I'm trying to create a TCP/IP connection with a device that is running embedded linux, I'm using from android the USB tethering to have a ethernet connection between the Android device and the Embedded Linux device, I modified the embedded linux device to support RNDIS device driver.
The Android and the embedded linux device are working correctly, a ethernet conection was established succesfully, I can ping from embedded linux to android device and viceversa.
On my android application I created a simple service to establish a TCP/IP connection with the embedded linux device, the problem happens when I try to connect i got the following error:
02-17 13:53:13.300: E/TCP Client(2576): C: Connecting...
02-17 13:53:13.310: E/TCP Client(2576): C: Error
02-17 13:53:13.310: E/TCP Client(2576): java.net.SocketException: socket failed: EACCES (Permission denied)
02-17 13:53:13.310: E/TCP Client(2576): at libcore.io.IoBridge.socket(IoBridge.java:583)
02-17 13:53:13.310: E/TCP Client(2576): at java.net.PlainSocketImpl.create(PlainSocketImpl.java:201)
02-17 13:53:13.310: E/TCP Client(2576): at java.net.Socket.startupSocket(Socket.java:559)
02-17 13:53:13.310: E/TCP Client(2576): at java.net.Socket.<init>(Socket.java:225)
02-17 13:53:13.310: E/TCP Client(2576): at com.example.service.TCPClientThread.run(TCPClientThread.java:75)
02-17 13:53:13.310: E/TCP Client(2576): Caused by: libcore.io.ErrnoException: socket failed: EACCES (Permission denied)
02-17 13:53:13.310: E/TCP Client(2576): at libcore.io.Posix.socket(Native Method)
02-17 13:53:13.310: E/TCP Client(2576): at libcore.io.BlockGuardOs.socket(BlockGuardOs.java:181)
02-17 13:53:13.310: E/TCP Client(2576): at libcore.io.IoBridge.socket(IoBridge.java:568)
02-17 13:53:13.310: E/TCP Client(2576): ... 4 more
I have configured my manifest as follows:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.dea600"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@drawable/example"
android:label="@string/appName" >
<activity
android:name="com.example.gui.mainActivity"
android:configChanges="orientation|screenSize"
android:screenOrientation="landscape"
android:theme="@android:style/Theme.Holo.Light.DarkActionBar" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<category android:name="android.intent.category.HOME" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<service
android:name="com.example.service.TCPClientService"
android:isolatedProcess="true"
android:label="TCP Client Service"
android:process=":TCPClientService" >
</service>
<receiver
android:name="com.example.service.TCPStartClientService"
android:enabled="true"
android:exported="true"
android:process=":StartTCPService">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
</application>
</manifest>
The most extrange thing is if I use a Android VM (Genymotion) I'm able to connect and everithing works correctly, but when I try to use it on a real device I get the error.
Thank you in advance for any comment.
EDIT:
This is the code I'm using to create the binding, I'm using the port 6540, and the IP is 192.168.42.130
public void run() {
try {
//here you must put your computer's IP address.
InetAddress serverAddr = InetAddress.getByName(SERVERIP);
Log.e("TCP Client", "C: Connecting...");
//create a socket to make the connection with the server
Connection = new Socket(serverAddr, SERVERPORT);
Log.e("TCP Client", "C: Connected...");
// Output Stream
OutStream = new DataOutputStream((OutputStream)Connection.getOutputStream());
// Input stream
InStream = new DataInputStream((InputStream)Connection.getInputStream());
while (ThreadStatus) {
try {
String message = myReadStream(InStream);
if (message.length() > 0) {
Log.e("TCP Client", "Received message ... " + message);
if (mMessageListener != null){
mMessageListener.messageReceived(message);
}
}
} catch (Exception e) {
ThreadStatus = false;
Log.e("TCP Client", "S: Error", e);
}
}
} catch (Exception e) {
Log.e("TCP Client", "C: Error", e);
} finally {
try {
Connection.close();
OutStream.close();
InStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (mConnectionEndListener != null){
mConnectionEndListener.notifyConnectionEnd();
}
}
I believe that when I try to create the socket the error occurs (Connection = new Socket(serverAddr, SERVERPORT);).
