Android ServerSocket accept as wifi hotspot

Question

I have an android device that is running as an access point (a.k.a. wifi hotspot) and It is running this code:

    serverSocket = new ServerSocket(serverPort);

    serverSocket.setReuseAddress(true);

    while (RUNNING) {
        try {
            final Socket socket = serverSocket.accept();

I will have some other client device connect to this device's wifi hotspot, and try to connect to the socket, and it will not be able to.

The access point's ip address is something like 192.168.43.1 ... so I will try to connect from the client device to 192.168.43.1:8080 and it will not work.

However, if both devices are connected to another wifi network, the serverSocket.accept(); will work just fine! I am using port 8080.

Do I need to tell the server socket to accept on the interface "ap0"? (Can I do that?) Is it a firewall issue on the android device?

Any solutions/ideas/suggestions are appreciated!

Edit:

I changed the port to 8988 and now it works just fine! ... Could it be a firewall issue? Any ideas how to navigate this issue?

score 0 · Answer 1 · answered Nov 20 '14 at 20:19

0

Yes you need to open socket on the server side also.

You should try the Android Example WiFiDirectDemo accessible in Android legacy: \Android\android-studio\sdk\samples\android-19\legacy just import it into your enviroment and give a try..

answered Nov 20 '14 at 20:19

5er

2,506
7
32
49

I changed the port from 8080 to 8988 and now it works. Now I want to know how to mek it work on port 80! =) – ChrisVollo Nov 20 '14 at 20:45
@ChrisVollo ports under 1024 are reserved for system. Why do you need port 80? – 5er Nov 20 '14 at 21:05
Found a solution. I changed the iptbles to redirect all traffic on port 80 to port 8080. – ChrisVollo Nov 20 '14 at 21:23

Android ServerSocket accept as wifi hotspot

1 Answers1