Can the client of a WifiP2pGroup know about the other clients?

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Brendan

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Jul 11, 2016, 2:25:46 PM7/11/16
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If I connect to a WifiP2pGroup as a client, can I get the client list? I asked this on StackOverflow, but haven't received any answers. https://stackoverflow.com/posts/38187617/edit 

I'm using Android Wi-Fi Direct service discovery. When connection info is available, I request group info if a group is formed. For some reason, when I connect as a client, I can get the group owner from the group, but the client list is empty. When I connect as a group owner, I'm able to get the group owner and the client list. When I get to the chat fragment, I'm trying to display who the group owner and clients are. Another issue is that the group owner device name seems to be blank, but the rest of the info is correct, like the address (I removed the address lines). I've tried requesting group info in a few different places, and I'm never able to get the client list when connected as a client. I switch to the chat fragment when I receive the `SERVICE_CONNECTED` intent. 

Connecting as client:

    I/wfd_: Wi-Fi P2P Connection Changed
    I/wfd_: Connected to P2P network. Requesting connection info
    I/wfd_: Connection info available
    I/wfd_: WifiP2pInfo:
    I/wfd_: Group formed: true
            Is group owner: false
            Group owner address: /192.168.49.1
    I/wfd_: Stopping service discovery
    I/wfd_: Service discovery stopped
    I/wfd_: Connected as client
    I/wfd_: Requesting group info
    I/wfd_CommReceiver: This device changed
    I/wfd_ClientSocketHandler: Client socket thread running
    I/wfd_ClientSocketHandler: Opening client socket
    I/System.out: [CDS][DNS] getAllByNameImpl netId = 0
    I/System.out: [socket][0] connection /192.168.49.1:4545;LocalPort=34789(5000)
    I/System.out: [CDS]connect[/192.168.49.1:4545] tm:5
    I/wfd_: Service discovery requests cleared
    I/wfd_: Group info available
    I/wfd_: WifiP2pGroup:
    I/wfd_: Network name: DIRECT-Ig-BLU Clark 2
            Is group owner: false
            Group owner:
            Device name: BLU Clark 2
            Status: Unavailable
                                                                   
            Client list is empty.
    /System.out: [socket][/192.168.49.117:34789] connected
    I/wfd_ClientSocketHandler: Client socket - true
    I/wfd_ClientSocketHandler: Launching the I/O handler
    I/wfd_CommReceiver: Service connected
    I/wfd_CommReceiver: Switching to Chat fragment
    I/wfd_: handleMessage() called


Connecting as group owner:

    I/wfd_: Wi-Fi P2P Connection Changed
    I/wfd_: Connected to P2P network. Requesting connection info
    I/wfd_: Connection info available
    I/wfd_: WifiP2pInfo:
    I/wfd_: Group formed: true
            Is group owner: true
            Group owner address: /192.168.49.1
    I/wfd_: Stopping service discovery
    I/wfd_: Service discovery stopped
    I/wfd_: Connected as group owner
    I/wfd_OwnerSocketHandler: Group owner server socket started
    I/wfd_: Requesting group info
    I/wfd_OwnerSocketHandler: Group owner server socket thread running
    I/wfd_: Service discovery requests cleared
    I/wfd_CommReceiver: This device changed
    I/wfd_: Group info available
    I/wfd_: WifiP2pGroup:
    I/wfd_: Network name: DIRECT-XB-Brendan BLU
            Is group owner: true
            Group owner:
            Device name:
            Status: Unavailable
                                                                   
            Client:
            Device name: BLU Clark 2
            Status: Connected
    I/wfd_CommReceiver: Service connected
    I/wfd_CommReceiver: Switching to Chat fragment
    I/wfd_OwnerSocketHandler: Launching the I/O handler
    I/wfd_: handleMessage() called



Code:

    @Override
        public void onConnectionInfoAvailable(WifiP2pInfo wifiP2pInfo) {
            Log.i(TAG, "Connection info available");
   
            Log.i(TAG, "WifiP2pInfo: ");
            Log.i(TAG, p2pInfoToString(wifiP2pInfo));
            this.groupFormed = wifiP2pInfo.groupFormed;
            this.isGroupOwner = wifiP2pInfo.isGroupOwner;
   
            if (wifiP2pInfo.groupFormed) {
                stopServiceDiscovery();
   
                Thread handler;
                if (wifiP2pInfo.isGroupOwner) {
                    Log.i(TAG, "Connected as group owner");
                    try {
                        handler = new OwnerSocketHandler(this.getHandler());
                        handler.start();
                    } catch (IOException e) {
                        Log.e(TAG, "Failed to create a server thread - " + e.getMessage());
                        return;
                    }
                } else {
                    Log.i(TAG, "Connected as client");
                    handler = new ClientSocketHandler(this.getHandler(), wifiP2pInfo.groupOwnerAddress);
                    handler.start();
                }
   
                Log.i(TAG, "Requesting group info");
                // Requests peer-to-peer group information
                wifiP2pManager.requestGroupInfo(channel, new WifiP2pManager.GroupInfoListener() {
                    @Override
                    public void onGroupInfoAvailable(WifiP2pGroup wifiP2pGroup) {
                        Log.i(TAG, "Group info available");
                        if (wifiP2pGroup != null) {
                            Log.i(TAG, "WifiP2pGroup:");
                            Log.i(TAG, p2pGroupToString(wifiP2pGroup));
                            WifiDirectHandler.this.wifiP2pGroup = wifiP2pGroup;
                        } else {
                            Log.w(TAG, "Group is null");
                        }
                        localBroadcastManager.sendBroadcast(new Intent(Action.SERVICE_CONNECTED));
                    }
                });
   
            } else {
                Log.w(TAG, "Group not formed");
            }
            localBroadcastManager.sendBroadcast(new Intent(Action.DEVICE_CHANGED));
        }

Thank you
- Brendan

Vinit Deshpande

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Jul 11, 2016, 3:21:35 PM7/11/16
to Brendan, Wi-Fi Direct
I don't think there is any way for the GC to get a complete list of all GCs. Only GO knows that.

This kind of functionality is expected to be handled at a higher layer. You should consider running a small server on GO to keep track of all the clients connected, and provide it to any client that might be running on GC.

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Brendan

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Jul 11, 2016, 8:46:55 PM7/11/16
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Thank you Vinit, I'll try that. 
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On Monday, July 11, 2016 at 7:25:46 PM UTC+1 Brendan wrote:
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