opiebluez: add scanning.

Ok, guys, everything until now was easy. It gets very ugly to go from here - even
to just get the name of a remote device, you have to setup some filters on the bluez socket,
fill in some random flags to generate a PDU that calls 'get name' and then afterwards
poll until the result comes in. Nasty :/

The BlueZ kernel interface seems to be very badly (if at all) documented.
All people are assuming that you use libbluetooth to talk to that stack.
However since libbluetooth is GPL, we can't do that :/
Guess, we are stuck here until someone finds time and/or motivation to look
into that and create some easy-to-understand examples for how to talk
directly to the BlueZ kernel interface.

1 files changed, 130 insertions, 7 deletions

diff --git a/libopie2/opiebluez/obluetooth.cpp b/libopie2/opiebluez/obluetooth.cpp
index e0ba0ec..80f4bfc 100644
--- a/libopie2/opiebluez/obluetooth.cpp
+++ b/libopie2/opiebluez/obluetooth.cpp
@@ -16,236 +16,359 @@
     : ..    .:,     . . .    without even the implied warranty of
     =_        +     =;=|`    MERCHANTABILITY or FITNESS FOR A
   _.=:.       :    :=>`:     PARTICULAR PURPOSE. See the GNU
 ..}^=.=       =       ;      Library General Public License for more
 ++=   -.     .`     .:       details.
  :     =  ...= . :.=-
  -.   .:....=;==+<;          You should have received a copy of the GNU
   -_. . .   )=.  =           Library General Public License along with
     --        :-=`           this library; see the file COPYING.LIB.
                              If not, write to the Free Software Foundation,
                              Inc., 59 Temple Place - Suite 330,
                              Boston, MA 02111-1307, USA.
 */
 
 #include "obluetooth.h"
 
 /* OPIE */
 #include <opie2/odebug.h>
 using namespace Opie::Core;
 
 /* STD */
 #include <bluetooth/bluetooth.h>
 #include <bluetooth/hci.h>
 #include <bluetooth/hci_lib.h>
 #include <assert.h>
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <sys/ioctl.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 
 namespace Opie {
 namespace Bluez {
 
 /*======================================================================================
  * OBluetooth
  *======================================================================================*/
 
 OBluetooth* OBluetooth::_instance = 0;
 
 OBluetooth::OBluetooth()
 {
     synchronize();
 }
 
 OBluetooth* OBluetooth::instance()
 {
     if ( !_instance ) _instance = new OBluetooth();
     return _instance;
 }
 
 OBluetooth::InterfaceIterator OBluetooth::iterator() const
 {
     return OBluetooth::InterfaceIterator( _interfaces );
 }
 
 int OBluetooth::count() const
 {
     return _interfaces.count();
 }
 
 OBluetoothInterface* OBluetooth::interface( const QString& iface ) const
 {
     return _interfaces[iface];
 }
 
 void OBluetooth::synchronize()
 {
     odebug << "OBluetooth::synchronize() - gathering available HCI devices" << oendl;
     _interfaces.clear();
 
     _fd = ::socket( AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI );
     if ( _fd == -1 )
     {
         owarn << "OBluetooth::synchronize() - can't open HCI control socket (" << strerror( errno ) << ")" << oendl;
         return;
     }
 
     struct hci_dev_list_req *dl;
     struct hci_dev_req *dr;
     struct hci_dev_info di;
 
     if (!(dl = (struct hci_dev_list_req*)malloc(HCI_MAX_DEV * sizeof(struct hci_dev_req) + sizeof(uint16_t))))
     {
         ofatal << "OBluetooth::synchronize() - can't allocate memory for HCI request" << oendl;
         return;
     }
 
     dl->dev_num = HCI_MAX_DEV;
     dr = dl->dev_req;
 
     if (::ioctl( _fd, HCIGETDEVLIST, (void *) dl) == -1)
     {
         owarn << "OBluetooth::synchronize() - can't complete HCIGETDEVLIST (" << strerror( errno ) << ")" << oendl;
         return;
     }
 
     for ( int i = 0; i < dl->dev_num; ++i )
     {
         di.dev_id = ( dr + i )->dev_id;
         if ( ::ioctl( _fd, HCIGETDEVINFO, (void *) &di ) == -1 )
         {
             owarn << "OBluetooth::synchronize() - can't issue HCIGETDEVINFO on device " << i << " (" << strerror( errno ) << ") - skipping that device. " << oendl;
             continue;
         }
         odebug << "OBluetooth::synchronize() - found device #" << di.dev_id << oendl;
         _interfaces.insert( di.name, new OBluetoothInterface( this, di.name, (void*) &di, _fd ) );
     }
 }
 
 /*======================================================================================
  * OBluetoothInterface
  *======================================================================================*/
 
 class OBluetoothInterface::Private
 {
   public:
     Private( struct hci_dev_info* di, int fd )
     {
         ::memcpy( &devinfo, di, sizeof(struct hci_dev_info) );
         ctlfd = fd;
     }
     void reloadInfo()
     {
         int result = ::ioctl( ctlfd, HCIGETDEVINFO, (void *) &devinfo );
         if ( result == -1 )
         {
             owarn << "OBluetoothInterface::Private - can't reload device info (" << strerror( errno ) << ")" << oendl;
         }
     }
     struct hci_dev_info devinfo;
     int ctlfd;
 };
 
 OBluetoothInterface::OBluetoothInterface( QObject* parent, const char* name, void* devinfo, int ctlfd )
                     :QObject( parent, name )
 {
     d = new OBluetoothInterface::Private( (struct hci_dev_info*) devinfo, ctlfd );
 }
 
 OBluetoothInterface::~OBluetoothInterface()
 {
 }
 
 QString OBluetoothInterface::macAddress() const
 {
     return QString().sprintf( "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X",
                               d->devinfo.bdaddr.b[5],
                               d->devinfo.bdaddr.b[4],
                               d->devinfo.bdaddr.b[3],
                               d->devinfo.bdaddr.b[2],
                               d->devinfo.bdaddr.b[1],
                               d->devinfo.bdaddr.b[0] );
 }
 
 bool OBluetoothInterface::setUp( bool b )
 {
     int cmd = b ? HCIDEVUP : HCIDEVDOWN;
     int result = ::ioctl( d->ctlfd, cmd, d->devinfo.dev_id );
     if ( result == -1 && errno != EALREADY )
     {
         owarn << "OBluetoothInterface::setUp( " << b << " ) - couldn't change interface state (" << strerror( errno ) << ")" << oendl;
         return false;
     }
     else
     {
         d->reloadInfo();
         return true;
     }
 }
 
 bool OBluetoothInterface::isUp() const
 {
     return hci_test_bit( HCI_UP, &d->devinfo.flags );
 }
 
 OBluetoothInterface::DeviceIterator OBluetoothInterface::neighbourhood()
 {
     _devices.clear();
     struct hci_inquiry_req* ir;
     int nrsp = 255;
 
     char* mybuffer = static_cast<char*>( malloc( sizeof( *ir ) + ( sizeof( inquiry_info ) * (nrsp) ) ) );
     assert( mybuffer );
 
     ir = (struct hci_inquiry_req*) mybuffer;
     memset( ir, 0, sizeof( *ir ) + ( sizeof( inquiry_info ) * (nrsp) ) );
 
     ir->dev_id  = d->devinfo.dev_id;
     ir->num_rsp = nrsp;
-    ir->length  = 8;
+    ir->length  = 8; // 10 seconds
     ir->flags   = 0;
-    ir->lap[0] = 0x33;
+    ir->lap[0] = 0x33; // GIAC
     ir->lap[1] = 0x8b;
     ir->lap[2] = 0x9e;
 
     int result = ::ioctl( d->ctlfd, HCIINQUIRY, mybuffer );
     if ( result == -1 )
     {
         owarn << "OBluetoothInterface::neighbourhood() - can't issue HCIINQUIRY (" << strerror( errno ) << ")" << oendl;
         return DeviceIterator( _devices );
     }
 
-    for( int i = 0; i < ir->num_rsp; ++i )
+    inquiry_info* ii = (inquiry_info*)( ir+1 );
+
+    for ( int i = 0; i < ir->num_rsp; ++i )
     {
-        odebug << "found a device" << oendl;
+        OBluetoothDevice* dev = new OBluetoothDevice( this, 0, ii );
+        _devices.insert( dev->macAddress(), dev );
+        ++ii;
     }
 
     return DeviceIterator( _devices );
 }
 
-
 /*======================================================================================
  * OBluetoothDevice
  *======================================================================================*/
 
-OBluetoothDevice::OBluetoothDevice( QObject* parent, const char* name )
+class OBluetoothDevice::Private
+{
+  public:
+    Private( inquiry_info* ii )
+    {
+        ::memcpy( &inqinfo, ii, sizeof(inquiry_info) );
+    }
+    inquiry_info inqinfo;
+};
+
+OBluetoothDevice::OBluetoothDevice( QObject* parent, const char* name, void* inqinfo )
                  :QObject( parent, name )
 {
     odebug << "OBluetoothDevice::OBluetoothDevice() - '" << name << "'" << oendl;
+    d = new OBluetoothDevice::Private( (inquiry_info*) inqinfo );
 }
 
 OBluetoothDevice::~OBluetoothDevice()
 {
     odebug << "OBluetoothDevice::~OBluetoothDevice()" << oendl;
 }
 
 QString OBluetoothDevice::macAddress() const
 {
-    return "N/A";
+    return QString().sprintf( "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X",
+    d->inqinfo.bdaddr.b[5],
+    d->inqinfo.bdaddr.b[4],
+    d->inqinfo.bdaddr.b[3],
+    d->inqinfo.bdaddr.b[2],
+    d->inqinfo.bdaddr.b[1],
+    d->inqinfo.bdaddr.b[0] );
+}
+
+QString OBluetoothDevice::deviceClass() const
+{
+    int maj = d->inqinfo.dev_class[1] & 0x1f;
+    int min = d->inqinfo.dev_class[0] >> 2;
+
+    QString major = QString( "Unknown(%1)" ).arg( maj );
+    QString minor = QString( "Unknown(%1)" ).arg( min );
+
+    switch ( maj )
+    {
+        case 0: major = "Miscellaneous";
+        break;
+
+        case 1: major = "Computer";
+        switch ( min )
+        {
+            case 0: minor = "Uncategorized";
+            case 1: minor = "Desktop workstation";
+            case 2: minor = "Server";
+            case 3: minor = "Laptop";
+            case 4: minor = "Handheld";
+            case 5: minor = "Palm";
+            case 6: minor = "Wearable";
+        }
+        break;
+
+        case 2: major = "Phone";
+        switch ( min )
+        {
+            case 0: minor = "Uncategorized"; break;
+            case 1: minor = "Cellular"; break;
+            case 2: minor = "Cordless"; break;
+            case 3: minor = "Smart phone"; break;
+            case 4: minor = "Wired modem or voice gateway"; break;
+            case 5: minor = "Common ISDN Access"; break;
+            case 6: minor = "Sim Card Reader"; break;
+        }
+        break;
+
+        case 3: major = "LAN Access";
+        break;
+
+        case 4: major = "Audio/Video";
+        switch ( min )
+        {
+            case 0: minor = "Uncategorized"; break;
+            case 1: minor = "Device conforms to the Headset profile"; break;
+            case 2: minor = "Hands-free"; break;
+            case 3: minor = "Reserved(3)"; break;
+            case 4: minor = "Microphone"; break;
+            case 5: minor = "Loudspeaker"; break;
+            case 6: minor = "Headphones"; break;
+            case 7: minor = "Portable Audio"; break;
+            case 8: minor = "Car Audio"; break;
+            case 9: minor = "Set-top box"; break;
+            case 10: minor = "HiFi Audio Device"; break;
+            case 11: minor = "VCR"; break;
+            case 12: minor = "Video Camera"; break;
+            case 13: minor = "Camcorder"; break;
+            case 14: minor = "Video Monitor"; break;
+            case 15: minor = "Video Display and Loudspeaker"; break;
+            case 16: minor = "Video Conferencing"; break;
+            case 17: minor = "Reserved(17)"; break;
+            case 18: minor = "Gaming/Toy"; break;
+        }
+        break;
+
+        case 5: major = "Peripheral";
+        switch ( min )
+        {
+            case 16: minor = "Keyboard"; break;
+            case 32: minor = "Pointing Device"; break;
+            case 48: minor = "Keyboard and Pointing Device"; break;
+        }
+        break;
+
+        case 6: major = "Imaging";
+        if (min & 4) minor = "Display";
+        else if (min & 8) minor = "Camera";
+        else if (min & 16) minor = "Scanner";
+        else if (min & 32) minor = "Printer";
+        break;
+
+        case 63: major = "Uncategorized";
+        break;
+    }
+
+    return QString( "%1:%2" ).arg( major ).arg( minor );
 }
 
+QString OBluetoothDevice::getName()
+{
+    /* FIXME: Uahhh, this gets ugly.
+    The BlueZ kernel interface seems to be very badly (if at all) documented.
+    All people are assuming that you use libbluetooth to talk to that stack.
+    However since libbluetooth is GPL, we can't do that :/
+    Guess, we are stuck here until someone finds time and/or motivation to look
+    into that and create some easy-to-understand examples for how to talk
+    directly to the BlueZ kernel interface.
+    */
+};
+
+
 }
 }