Add ConnectivityManager.getConnectionOwnerUid()
Allow VPN apps to lookup the UID owner of a network connection.
Requires specifying the:
- IP address and port for both the source and destination of a TCP
connection.
- IP address and port for either source and destination or just
source for a UDP connection.
Only TCP and UDP protocols are supported. Only connections for UIDs
that apply to the calling VPN app will be resolved. This is intended
to replace direct app access to /proc/net/{tcp,tcp6,udp,udp6}.
The implementation uses netlink inet_diag sockets[1] to perform
the lookup on TCP sockets as well as UDP sockets when supported
(kernel has CONFIG_INET_UDP_DIAG=y).
[1] http://man7.org/linux/man-pages/man7/sock_diag.7.html
Bug: 9496886
Bug: 109758967
Test: atest HostsideVpnTests
Test: atest InetDiagSocketTest on Taimen with CONFIG_INET_UDP_DIAG
and on Sailfish without CONFIG_INET_UDP_DIAG.
Change-Id: I2bbc7072dd091e2e653dadf6dc05024c04180f34
diff --git a/core/java/android/net/ConnectionInfo.aidl b/core/java/android/net/ConnectionInfo.aidl
new file mode 100644
index 0000000..07faf8b
--- /dev/null
+++ b/core/java/android/net/ConnectionInfo.aidl
@@ -0,0 +1,20 @@
+/*
+**
+** Copyright (C) 2018 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;
+
+parcelable ConnectionInfo;
diff --git a/core/java/android/net/ConnectionInfo.java b/core/java/android/net/ConnectionInfo.java
new file mode 100644
index 0000000..58d0e05
--- /dev/null
+++ b/core/java/android/net/ConnectionInfo.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.UnknownHostException;
+
+/**
+ * Describe a network connection including local and remote address/port of a connection and the
+ * transport protocol.
+ *
+ * @hide
+ */
+public final class ConnectionInfo implements Parcelable {
+ public final int protocol;
+ public final InetSocketAddress local;
+ public final InetSocketAddress remote;
+
+ @Override
+ public int describeContents() {
+ return 0;
+ }
+
+ public ConnectionInfo(int protocol, InetSocketAddress local, InetSocketAddress remote) {
+ this.protocol = protocol;
+ this.local = local;
+ this.remote = remote;
+ }
+
+ @Override
+ public void writeToParcel(Parcel out, int flags) {
+ out.writeInt(protocol);
+ out.writeByteArray(local.getAddress().getAddress());
+ out.writeInt(local.getPort());
+ out.writeByteArray(remote.getAddress().getAddress());
+ out.writeInt(remote.getPort());
+ }
+
+ public static final Creator<ConnectionInfo> CREATOR = new Creator<ConnectionInfo>() {
+ public ConnectionInfo createFromParcel(Parcel in) {
+ int protocol = in.readInt();
+ InetAddress localAddress;
+ try {
+ localAddress = InetAddress.getByAddress(in.createByteArray());
+ } catch (UnknownHostException e) {
+ throw new IllegalArgumentException("Invalid InetAddress");
+ }
+ int localPort = in.readInt();
+ InetAddress remoteAddress;
+ try {
+ remoteAddress = InetAddress.getByAddress(in.createByteArray());
+ } catch (UnknownHostException e) {
+ throw new IllegalArgumentException("Invalid InetAddress");
+ }
+ int remotePort = in.readInt();
+ InetSocketAddress local = new InetSocketAddress(localAddress, localPort);
+ InetSocketAddress remote = new InetSocketAddress(remoteAddress, remotePort);
+ return new ConnectionInfo(protocol, local, remote);
+ }
+
+ public ConnectionInfo[] newArray(int size) {
+ return new ConnectionInfo[size];
+ }
+ };
+}
diff --git a/core/java/android/net/ConnectivityManager.java b/core/java/android/net/ConnectivityManager.java
index ce18796..f2e9078 100644
--- a/core/java/android/net/ConnectivityManager.java
+++ b/core/java/android/net/ConnectivityManager.java
@@ -59,6 +59,7 @@
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.net.InetAddress;
+import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
@@ -3930,4 +3931,26 @@
throw e.rethrowFromSystemServer();
}
}
+
+ /**
+ * Returns the {@code uid} of the owner of a network connection.
+ *
+ * @param protocol The protocol of the connection. Only {@code IPPROTO_TCP} and
+ * {@code IPPROTO_UDP} currently supported.
+ * @param local The local {@link InetSocketAddress} of a connection.
+ * @param remote The remote {@link InetSocketAddress} of a connection.
+ *
+ * @return {@code uid} if the connection is found and the app has permission to observe it
+ * (e.g., if it is associated with the calling VPN app's tunnel) or
+ * {@link android.os.Process#INVALID_UID} if the connection is not found.
+ */
+ public int getConnectionOwnerUid(int protocol, InetSocketAddress local,
+ InetSocketAddress remote) {
+ ConnectionInfo connectionInfo = new ConnectionInfo(protocol, local, remote);
+ try {
+ return mService.getConnectionOwnerUid(connectionInfo);
+ } catch (RemoteException e) {
+ throw e.rethrowFromSystemServer();
+ }
+ }
}
diff --git a/core/java/android/net/IConnectivityManager.aidl b/core/java/android/net/IConnectivityManager.aidl
index ce95b60..e7d441d 100644
--- a/core/java/android/net/IConnectivityManager.aidl
+++ b/core/java/android/net/IConnectivityManager.aidl
@@ -17,6 +17,7 @@
package android.net;
import android.app.PendingIntent;
+import android.net.ConnectionInfo;
import android.net.LinkProperties;
import android.net.Network;
import android.net.NetworkCapabilities;
@@ -182,4 +183,6 @@
String getCaptivePortalServerUrl();
byte[] getNetworkWatchlistConfigHash();
+
+ int getConnectionOwnerUid(in ConnectionInfo connectionInfo);
}
diff --git a/core/java/android/os/Process.java b/core/java/android/os/Process.java
index 7ce7c92..d0cdf6e 100644
--- a/core/java/android/os/Process.java
+++ b/core/java/android/os/Process.java
@@ -40,6 +40,11 @@
public static final String SECONDARY_ZYGOTE_SOCKET = "zygote_secondary";
/**
+ * An invalid UID value.
+ */
+ public static final int INVALID_UID = -1;
+
+ /**
* Defines the root UID.
* @hide
*/