From c1a85a007b1ee86857fdf49a64cc0598cc5b7cef Mon Sep 17 00:00:00 2001
From: Andrzej Kaczmarek <andrzej.kaczmarek@codecoup.pl>
Date: Mon, 14 May 2018 21:43:02 +0200
Subject: [PATCH] nimble/host: Enable auth payload tmo event only for >=4.1

LE Ping was added in Core 4.1 thus Authenticated Payload Timeout Event
shall be only enabled for controller supporting >=4.1.

Note it would be also good to check for controller features to confirm,
but we do not have this implemented yet.
---
 nimble/host/src/ble_hs_startup.c | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/nimble/host/src/ble_hs_startup.c b/nimble/host/src/ble_hs_startup.c
index 63428a0fb..00a0f86ef 100644
--- a/nimble/host/src/ble_hs_startup.c
+++ b/nimble/host/src/ble_hs_startup.c
@@ -279,8 +279,11 @@ static int
 ble_hs_startup_set_evmask_tx(void)
 {
     uint8_t buf[BLE_HCI_SET_EVENT_MASK_LEN];
+    uint8_t version;
     int rc;
 
+    version = ble_hs_hci_get_hci_version();
+
     /**
      * Enable the following events:
      *     0x0000000000000010 Disconnection Complete Event
@@ -298,16 +301,18 @@ ble_hs_startup_set_evmask_tx(void)
         return rc;
     }
 
-    /**
-     * Enable the following events:
-     *     0x0000000000800000 Authenticated Payload Timeout Event
-     */
-    ble_hs_hci_cmd_build_set_event_mask2(0x0000000000800000, buf, sizeof buf);
-    rc = ble_hs_hci_cmd_tx_empty_ack(BLE_HCI_OP(BLE_HCI_OGF_CTLR_BASEBAND,
-                                                BLE_HCI_OCF_CB_SET_EVENT_MASK2),
-                                     buf, sizeof(buf));
-    if (rc != 0) {
-        return rc;
+    if (version >= BLE_HCI_VER_BCS_4_1) {
+        /**
+         * Enable the following events:
+         *     0x0000000000800000 Authenticated Payload Timeout Event
+         */
+        ble_hs_hci_cmd_build_set_event_mask2(0x0000000000800000, buf, sizeof buf);
+        rc = ble_hs_hci_cmd_tx_empty_ack(BLE_HCI_OP(BLE_HCI_OGF_CTLR_BASEBAND,
+                                                    BLE_HCI_OCF_CB_SET_EVENT_MASK2),
+                                         buf, sizeof(buf));
+        if (rc != 0) {
+            return rc;
+        }
     }
 
     return 0;