Simultaneous scan and request

I'm trying to scan for all available devices, and query them for their name
as soon as possible, without waiting for the scan to complete.

However, if I read a  EVT_INQUIRY_RESULT and then attempt to issue a
OCF_REMOTE_NAME_REQ on the same socket, it always returns with a 0x07 error
(out of memory?). The same thing happens if I use hci_read_remote_name. But
if I wait until EVT_INQUIRY_COMPLETE is received and then issue
hci_read_remote_name, everything works great.

I've also tried opening a 2nd socket with another call to hci_open_dev, but
it appears to be just a symbolic link to the same device. It has a different
fd number, but I receive the (same) data from both sockets, and it still
gives IO error.

So what is the trick to getting simultaneous commands like this working?

Thank you!


Some pseudo code:

/* this will be the socket accepting EVT_INQUIRY_RESULT */
scanner = hci_open_dev( 0 );

/* Set up a filter. If somebody could explain how this works? */
hci_filter_clear( &flt );
hci_filter_all_events( &flt );
hci_filter_set_ptype( HCI_EVENT_PKT, &flt );
setsockopt( sock, SOL_HCI, HCI_FILTER, &flt, sizeof(flt))

/* Send inquiry request - doesn't use ioctl like hid_inquiry does */
guint8 packet[5] = { 0x33, 0x8b, 0x9e, 0x08, 0xff }; (8 * 1.25 seconds
duration, 255 max response)
hci_send_cmd( sock, OGF_LINK_CTL, OCF_INQUIRY, sizeof(packet), packet)

while(1){
    select( [scanner FD_SET] ); // Wait for some response
    recv( scanner, resp, ..); // Read the response

    if (resp[0] == EVT_INQUIRY_RESULT){
        bacpy(bdaddr, resp + someoffset)
        hci_read_remote_name( scanner, bdaddr, ..., 0) // Fails
"Input/output" error

        // Note that this also fails:
        dd = hci_open_dev( 0 )
        hci_read_remote_name( dd, bdaddr, ..., 0) // Fails "Input/output"
error
        hci_close_close( dd )
    }

    if (resp[0] == EVT_INQUIRY_COMPLETE){
        hci_read_remote_name( scanner, bdaddr, ..., 0) // This one works!
        break;
    }
}

hci_close_dev( scanner );

-------------------------------------------------------------------------
Check out the new SourceForge.net Marketplace.
It's the best place to buy or sell services for
just about anything Open Source.
http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace

_______________________________________________
Bluez-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/bluez-users