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Code Issues Projects Releases Wiki Activity

Use WifiManager to get wifi network information.

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This ensures we bind to the wifi interface even if it doesn't have internet access and there's another interface with internet access (e.g. mobile data).
This commit is contained in:
akwizgran
2018-03-26 13:58:10 +01:00
parent 235183a3af
commit e0a1fa559d
1 changed files with 41 additions and 13 deletions
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54
bramble-android/src/main/java/org/briarproject/bramble/plugin/tcp/AndroidLanTcpPlugin.java
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@@ -4,21 +4,25 @@ import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
import org.briarproject.bramble.api.plugin.Backoff;
import org.briarproject.bramble.api.plugin.duplex.DuplexPluginCallback;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Collection;
import java.util.concurrent.Executor;
import java.util.logging.Logger;
import javax.annotation.Nullable;
import static android.content.Context.CONNECTIVITY_SERVICE;
import static android.content.Context.WIFI_SERVICE;
import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
import static android.net.ConnectivityManager.TYPE_WIFI;
import static java.util.Collections.emptyList;
import static java.util.Collections.singletonList;
@NotNullByDefault
class AndroidLanTcpPlugin extends LanTcpPlugin {
@@ -27,6 +31,8 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
Logger.getLogger(AndroidLanTcpPlugin.class.getName());
private final Context appContext;
@Nullable
private final WifiManager wifiManager;
@Nullable
private volatile BroadcastReceiver networkStateReceiver = null;
@@ -36,6 +42,8 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
int maxIdleTime) {
super(ioExecutor, backoff, callback, maxLatency, maxIdleTime);
this.appContext = appContext;
wifiManager = (WifiManager) appContext.getApplicationContext()
.getSystemService(WIFI_SERVICE);
}
@Override
@@ -56,20 +64,40 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
tryToClose(socket);
}
@Override
protected Collection<InetAddress> getLocalIpAddresses() {
if (wifiManager == null) return emptyList();
WifiInfo info = wifiManager.getConnectionInfo();
if (info == null || info.getIpAddress() == 0) return emptyList();
return singletonList(intToInetAddress(info.getIpAddress()));
}
private InetAddress intToInetAddress(int ip) {
byte[] ipBytes = new byte[4];
ipBytes[0] = (byte) (ip & 0xFF);
ipBytes[1] = (byte) ((ip >> 8) & 0xFF);
ipBytes[2] = (byte) ((ip >> 16) & 0xFF);
ipBytes[3] = (byte) ((ip >> 24) & 0xFF);
try {
return InetAddress.getByAddress(ipBytes);
} catch (UnknownHostException e) {
// Should only be thrown if address has illegal length
throw new AssertionError(e);
}
}
private class NetworkStateReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context ctx, Intent i) {
if (!running) return;
Object o = ctx.getSystemService(CONNECTIVITY_SERVICE);
ConnectivityManager cm = (ConnectivityManager) o;
NetworkInfo net = cm.getActiveNetworkInfo();
if (net != null && net.getType() == TYPE_WIFI && net.isConnected()) {
LOG.info("Connected to Wi-Fi");
if (socket == null || socket.isClosed()) bind();
} else {
LOG.info("Not connected to Wi-Fi");
if (!running || wifiManager == null) return;
WifiInfo info = wifiManager.getConnectionInfo();
if (info == null || info.getIpAddress() == 0) {
LOG.info("Not connected to wifi");
tryToClose(socket);
} else {
LOG.info("Connected to wifi");
if (socket == null || socket.isClosed()) bind();
}
}
}