From ca248e3667f52f951bdd60d923b25a6b8fb4296d Mon Sep 17 00:00:00 2001
From: Alex Blasche <alexander.blasche@qt.io>
Date: Tue, 16 May 2017 15:11:57 +0200
Subject: Make it more obvious that another active BTLE connection prevents
 connect

Task-number: QTBUG-55150
Change-Id: I223e2b2015e210162e59fb994b9352e790b036d4
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
---
 src/bluetooth/bluez/bluez_data_p.h |  4 ++++
 src/bluetooth/bluez/hcimanager.cpp | 44 ++++++++++++++++++++++++++++++++++++++
 src/bluetooth/bluez/hcimanager_p.h |  4 ++++
 3 files changed, 52 insertions(+)

(limited to 'src/bluetooth/bluez')

diff --git a/src/bluetooth/bluez/bluez_data_p.h b/src/bluetooth/bluez/bluez_data_p.h
index 8c2dc43e..25edc661 100644
--- a/src/bluetooth/bluez/bluez_data_p.h
+++ b/src/bluetooth/bluez/bluez_data_p.h
@@ -99,6 +99,10 @@ struct bt_security {
 #define BDADDR_LE_PUBLIC    0x01
 #define BDADDR_LE_RANDOM    0x02
 
+#define SCO_LINK    0x00
+#define ACL_LINK    0x01
+#define ESCO_LINK   0x02
+#define LE_LINK     0x80    // based on hcitool.c -> no fixed constant available
 
 /* Byte order conversions */
 #if __BYTE_ORDER == __LITTLE_ENDIAN
diff --git a/src/bluetooth/bluez/hcimanager.cpp b/src/bluetooth/bluez/hcimanager.cpp
index 93bf941b..c524117c 100644
--- a/src/bluetooth/bluez/hcimanager.cpp
+++ b/src/bluetooth/bluez/hcimanager.cpp
@@ -288,6 +288,50 @@ QBluetoothAddress HciManager::addressForConnectionHandle(quint16 handle) const
     return QBluetoothAddress();
 }
 
+QVector<quint16> HciManager::activeLowEnergyConnections() const
+{
+    if (!isValid())
+        return QVector<quint16>();
+
+    hci_conn_info *info;
+    hci_conn_list_req *infoList;
+
+    const int maxNoOfConnections = 20;
+    infoList = (hci_conn_list_req *)
+            malloc(sizeof(hci_conn_list_req) + maxNoOfConnections * sizeof(hci_conn_info));
+
+    if (!infoList)
+        return QVector<quint16>();
+
+    QScopedPointer<hci_conn_list_req, QScopedPointerPodDeleter> p(infoList);
+    p->conn_num = maxNoOfConnections;
+    p->dev_id = hciDev;
+    info = p->conn_info;
+
+    if (ioctl(hciSocket, HCIGETCONNLIST, (void *) infoList) < 0) {
+        qCWarning(QT_BT_BLUEZ) << "Cannot retrieve connection list";
+        return QVector<quint16>();
+    }
+
+    QVector<quint16> activeLowEnergyHandles;
+    for (int i = 0; i < infoList->conn_num; i++) {
+        switch (info[i].type) {
+        case SCO_LINK:
+        case ACL_LINK:
+        case ESCO_LINK:
+            continue;
+        case LE_LINK:
+            activeLowEnergyHandles.append(info[i].handle);
+            break;
+        default:
+            qCWarning(QT_BT_BLUEZ) << "Unknown active connection type:" << hex << info[i].type;
+            break;
+        }
+    }
+
+    return activeLowEnergyHandles;
+}
+
 quint16 forceIntervalIntoRange(double connectionInterval)
 {
     return qMin<double>(qMax<double>(7.5, connectionInterval), 4000) / 1.25;
diff --git a/src/bluetooth/bluez/hcimanager_p.h b/src/bluetooth/bluez/hcimanager_p.h
index 3bae92e5..3127a747 100644
--- a/src/bluetooth/bluez/hcimanager_p.h
+++ b/src/bluetooth/bluez/hcimanager_p.h
@@ -55,6 +55,7 @@
 #include <QtCore/QSet>
 #include <QtCore/QSocketNotifier>
 #include <QtBluetooth/QBluetoothAddress>
+#include <QVector>
 #include "bluez/bluez_data_p.h"
 
 QT_BEGIN_NAMESPACE
@@ -82,6 +83,9 @@ public:
     void stopEvents();
     QBluetoothAddress addressForConnectionHandle(quint16 handle) const;
 
+    // active connections
+    QVector<quint16> activeLowEnergyConnections() const;
+
     bool sendConnectionUpdateCommand(quint16 handle, const QLowEnergyConnectionParameters &params);
     bool sendConnectionParameterUpdateRequest(quint16 handle,
                                               const QLowEnergyConnectionParameters &params);
-- 
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