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From:   Sathish Narsimman <nsathish41@gmail.com>
To:     linux-bluetooth@vger.kernel.org, nsathish41@gmail.com
Cc:     chethan.tumkur.narayan@intel.com,
        Sathish Narsimman <sathish.narasimman@intel.com>,
        Joy Shermin <shermin.joy@intel.com>
Subject: [PATCH 3/7] Bluetooth: Update the Resolving list when Local IRK changed
Date:   Thu, 12 Mar 2020 15:37:50 +0530
Message-Id: <20200312100754.3445-4-sathish.narasimman@intel.com>
In-Reply-To: <20200312100754.3445-1-sathish.narasimman@intel.com>
References: <20200312100754.3445-1-sathish.narasimman@intel.com>
Sender: linux-bluetooth-owner@vger.kernel.org
Precedence: bulk

Whenever the Local IRK changes. i.e privacy mode is toggled
this patch helps to change the IRK list in the bluetooth
controller

Signed-off-by: Sathish Narsimman <sathish.narasimman@intel.com>
Signed-off-by: Joy Shermin <shermin.joy@intel.com>
---
 include/net/bluetooth/hci_core.h |  2 ++
 net/bluetooth/hci_request.c      | 50 ++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index e5e09d530ce7..43d31a9339a6 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1659,6 +1659,8 @@ void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
 			       u8 *bdaddr_type);
 int hci_req_update_resolving_list(struct hci_dev *hdev,  u8 addr_type,
 				  bdaddr_t *bdaddr, u8 irk[16]);
+void hci_req_update_resolving_list_local_irk(struct hci_dev *hdev);
+
 void hci_req_del_from_resolving_list(struct hci_dev *hdev, u8 addr_type,
 				     bdaddr_t *bdaddr);
 
diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index 88225a9ca1f8..9ffb62178d24 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -965,6 +965,56 @@ int hci_req_update_resolving_list(struct hci_dev *hdev, u8 type, bdaddr_t *bdadd
 	return 0;
 }
 
+void hci_req_update_resolving_list_local_irk(struct hci_dev *hdev)
+{
+	struct bdaddr_list_with_irk *irk;
+	struct hci_request req;
+
+	BT_DBG("");
+
+	/* Nothing to be done if LL privacy is not supported. */
+	if (!(hdev->le_features[0] & HCI_LE_LL_PRIVACY))
+		return;
+
+	/* If resolving list is empty, nothing is to be done.*/
+	if (list_empty(&hdev->le_resolv_list))
+		return;
+
+	/* Resolving List cannot be updated if address resolution
+	 * in the controller is enabled and advertisement or scanning
+	 * or create connection command is ongoing.
+	 */
+	if ( !hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION) &&
+	    ( hci_dev_test_flag(hdev, HCI_LE_ADV) ||
+	      hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
+	      hci_lookup_le_connect(hdev) ) )
+		return;
+
+	/* If resolving list is not empty, then clear the resolving list
+	 * and add back each entry with updated local IRK.
+	 */
+	hci_req_init(&req, hdev);
+
+	list_for_each_entry(irk, &hdev->le_resolv_list, list) {
+		struct hci_cp_le_add_to_resolv_list cp;
+		struct hci_cp_le_del_from_resolv_list cp1;
+
+		cp1.bdaddr_type = irk->bdaddr_type;
+		bacpy(&cp1.bdaddr, &irk->bdaddr);
+		hci_req_add(&req, HCI_OP_LE_DEL_FROM_RESOLV_LIST,
+			    sizeof(cp1), &cp1);
+
+		cp.bdaddr_type = irk->bdaddr_type;
+		bacpy(&cp.bdaddr, &irk->bdaddr);
+		memcpy(cp.peer_irk, irk->peer_irk, 16);
+		memcpy(cp.local_irk, hdev->irk, 16);
+		hci_req_add(&req, HCI_OP_LE_ADD_TO_RESOLV_LIST,
+			    sizeof(cp), &cp);
+	}
+
+	hci_req_run(&req, NULL);
+}
+
 void hci_req_del_from_resolving_list(struct hci_dev *hdev, u8 addr_type, bdaddr_t *bdaddr)
 {
 	struct hci_cp_le_del_from_resolv_list cp;
-- 
2.17.1