From patchwork Thu Jul 30 09:14:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcel Holtmann X-Patchwork-Id: 11692565 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9E6256C1 for ; Thu, 30 Jul 2020 09:14:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 90FEA20809 for ; Thu, 30 Jul 2020 09:14:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729213AbgG3JO2 (ORCPT ); Thu, 30 Jul 2020 05:14:28 -0400 Received: from coyote.holtmann.net ([212.227.132.17]:43649 "EHLO mail.holtmann.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728815AbgG3JO1 (ORCPT ); Thu, 30 Jul 2020 05:14:27 -0400 Received: from localhost.localdomain (p4ff9f430.dip0.t-ipconnect.de [79.249.244.48]) by mail.holtmann.org (Postfix) with ESMTPSA id 626DDCECF3 for ; Thu, 30 Jul 2020 11:24:28 +0200 (CEST) From: Marcel Holtmann To: linux-bluetooth@vger.kernel.org Subject: [PATCH 2/8] Bluetooth: Configure controller address resolution if available Date: Thu, 30 Jul 2020 11:14:15 +0200 Message-Id: <20200730091421.48847-2-marcel@holtmann.org> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org When the LL Privacy support is available, then as part of enabling or disabling passive background scanning, it is required to set up the controller based address resolution as well. Since only passive background scanning is utilizing the whitelist, the address resolution is now bound to the whitelist and passive background scanning. All other resolution can be easily done by the host stack. Signed-off-by: Marcel Holtmann Signed-off-by: Sathish Narsimman Signed-off-by: Marcel Holtmann --- include/net/bluetooth/hci_core.h | 3 +++ net/bluetooth/hci_request.c | 26 +++++++++++++++++++++++--- 2 files changed, 26 insertions(+), 3 deletions(-) diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index bee1b4778ccc..8caac20556b4 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -1359,6 +1359,9 @@ void hci_conn_del_sysfs(struct hci_conn *conn); #define scan_coded(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_CODED) || \ ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_CODED)) +/* Use LL Privacy based address resolution if supported */ +#define use_ll_privacy(dev) ((dev)->le_features[0] & HCI_LE_LL_PRIVACY) + /* Use ext scanning if set ext scan param and ext scan enable is supported */ #define use_ext_scan(dev) (((dev)->commands[37] & 0x20) && \ ((dev)->commands[37] & 0x40)) diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c index 7c0c2fda04ad..7d0ba53ffed0 100644 --- a/net/bluetooth/hci_request.c +++ b/net/bluetooth/hci_request.c @@ -675,6 +675,12 @@ void hci_req_add_le_scan_disable(struct hci_request *req) cp.enable = LE_SCAN_DISABLE; hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp); } + + if (use_ll_privacy(hdev) && + hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) { + __u8 enable = 0x00; + hci_req_add(req, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, 1, &enable); + } } static void del_from_white_list(struct hci_request *req, bdaddr_t *bdaddr, @@ -816,7 +822,8 @@ static bool scan_use_rpa(struct hci_dev *hdev) } static void hci_req_start_scan(struct hci_request *req, u8 type, u16 interval, - u16 window, u8 own_addr_type, u8 filter_policy) + u16 window, u8 own_addr_type, u8 filter_policy, + bool addr_resolv) { struct hci_dev *hdev = req->hdev; @@ -825,6 +832,11 @@ static void hci_req_start_scan(struct hci_request *req, u8 type, u16 interval, return; } + if (use_ll_privacy(hdev) && addr_resolv) { + u8 enable = 0x01; + hci_req_add(req, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, 1, &enable); + } + /* Use ext scanning if set ext scan param and ext scan enable is * supported */ @@ -898,12 +910,18 @@ static void hci_req_start_scan(struct hci_request *req, u8 type, u16 interval, } } +/* Ensure to call hci_req_add_le_scan_disable() first to disable the + * controller based address resolution to be able to reconfigure + * resolving list. + */ void hci_req_add_le_passive_scan(struct hci_request *req) { struct hci_dev *hdev = req->hdev; u8 own_addr_type; u8 filter_policy; u16 window, interval; + /* Background scanning should run with address resolution */ + bool addr_resolv = true; if (hdev->scanning_paused) { bt_dev_dbg(hdev, "Scanning is paused for suspend"); @@ -949,7 +967,7 @@ void hci_req_add_le_passive_scan(struct hci_request *req) bt_dev_dbg(hdev, "LE passive scan with whitelist = %d", filter_policy); hci_req_start_scan(req, LE_SCAN_PASSIVE, interval, window, - own_addr_type, filter_policy); + own_addr_type, filter_policy, addr_resolv); } static u8 get_adv_instance_scan_rsp_len(struct hci_dev *hdev, u8 instance) @@ -2789,6 +2807,8 @@ static int active_scan(struct hci_request *req, unsigned long opt) u8 own_addr_type; /* White list is not used for discovery */ u8 filter_policy = 0x00; + /* Discovery doesn't require controller address resolution */ + bool addr_resolv = false; int err; BT_DBG("%s", hdev->name); @@ -2811,7 +2831,7 @@ static int active_scan(struct hci_request *req, unsigned long opt) hci_req_start_scan(req, LE_SCAN_ACTIVE, interval, hdev->le_scan_window_discovery, own_addr_type, - filter_policy); + filter_policy, addr_resolv); return 0; }