Issue BTDevice::unpair() directly when device is discovered, disconnected and connected as peripheral

This enforces a consistent and stable security workflow.
- when a BTRole::Slave BTDevice is discovered, see AdapterStatusListener::deviceFound().
- when a BTRole::Slave BTDevice is disconnected, see AdapterStatusListener::deviceDisconnected().
- when a BTRole::Master BTDevice gets connected, see AdapterStatusListener::deviceConnected().

+++

Especially when connected as peripheral without unpair in SC mode,
the peripheral fails the DHKey Check.
TODO: Provide a persistent pre-pairing mechanism via SMPKeyBin for peripheral mode.

+++

Note: Our existing example code to connect to a remote slave/peripheral,
already performed the unpair on deviceFound(..) and deviceDisconnected().
These calls have now being removed, as they are performed directly by Direct-BT.

The example code uploads pre-existing keys for pre-pairing when device is found,
if existing.

1 files changed, 0 insertions, 10 deletions

diff --git a/examples/java/DBTScanner10.java b/examples/java/DBTScanner10.java
index 67b92df5..f6f31b43 100644
--- a/examples/java/DBTScanner10.java
+++ b/examples/java/DBTScanner10.java
@@ -348,11 +348,6 @@ public class DBTScanner10 {
             } });
 
         {
-            final HCIStatusCode r = device.unpair();
-            BTUtils.println(System.err, "****** Connecting Device: Unpair-Pre result: "+r);
-        }
-
-        {
             final HCIStatusCode r = device.getAdapter().stopDiscovery();
             BTUtils.println(System.err, "****** Connecting Device: stopDiscovery result "+r);
         }
@@ -567,11 +562,6 @@ public class DBTScanner10 {
 
         if( !KEEP_CONNECTED ) {
 
-            {
-                final HCIStatusCode unpair_res = device.unpair();
-                BTUtils.println(System.err, "****** Processing Ready Device: Unpair-Post result: "+unpair_res);
-            }
-
             device.remove();
 
             if( 0 < RESET_ADAPTER_EACH_CONN && 0 == deviceReadyCount.get() % RESET_ADAPTER_EACH_CONN ) {