SocketException: EACCESS (permission denied)

I am trying to create a socket in Android but I keep getting EACCESS (Permission denied) errors.

Here is my code on a separate thread from the UI thread.

public class Client implements Runnable {
    private final static String SERVER_ADDRESS = "173.246.12.125";

    @Override
    public void run() {
        try {
            InetAddress serverAddr = InetAddress.getByName(SERVER_ADDRESS);
            DatagramSocket socket = new DatagramSocket();
            ...

      

My android permissions include:

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />

      

and just because of some stackoverflow answers I added this as well:

    <permission android:name="android.permission.INTERNET"/>

      

but I still cannot create the socket.

What am I missing? Error output:

 java.net.SocketException: socket failed: EACCES (Permission denied)
        at libcore.io.IoBridge.socket(IoBridge.java:623)
        at java.net.PlainDatagramSocketImpl.create(PlainDatagramSocketImpl.java:93)
        at java.net.DatagramSocket.createSocket(DatagramSocket.java:157)
        at java.net.DatagramSocket.<init>(DatagramSocket.java:80)
        at java.net.DatagramSocket.<init>(DatagramSocket.java:65)
        ...

Caused by: android.system.ErrnoException: socket failed: EACCES (Permission denied)
        at libcore.io.Posix.socket(Native Method)
        at libcore.io.BlockGuardOs.socket(BlockGuardOs.java:282)
        at libcore.io.IoBridge.socket(IoBridge.java:608) 
        at java.net.PlainDatagramSocketImpl.create(PlainDatagramSocketImpl.java:93)
        at java.net.DatagramSocket.createSocket(DatagramSocket.java:157)
        at java.net.DatagramSocket.<init>(DatagramSocket.java:80)
        at java.net.DatagramSocket.<init>(DatagramSocket.java:65)
        at com.austinfathman.traffic_server.Client.run(UDP.java:73)
        at java.lang.Thread.run(Thread.java:818)

      

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1 answer


I was getting a similar error. It turns out that if you try to bind the port that is in use, it won't work.

DatagramSocket socket = new DatagramSocket(3996);

      



This worked for me.

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