From: Sathish Narasimman <nsathish41@xxxxxxxxx>
This patch adds support to enable the use of RPA Address resolution
using expermental feature mgmt command.
Signed-off-by: Sathish Narasimman <sathish.narasimman@xxxxxxxxx>
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
---
include/net/bluetooth/hci.h | 1 +
net/bluetooth/hci_event.c | 1 +
net/bluetooth/hci_request.c | 7 +-
net/bluetooth/mgmt.c | 142 +++++++++++++++++++++++++++++++++++-
4 files changed, 148 insertions(+), 3 deletions(-)
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index dd82cce77a7a..c8e67042a3b1 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -318,6 +318,7 @@ enum {
HCI_FORCE_BREDR_SMP,
HCI_FORCE_STATIC_ADDR,
HCI_LL_RPA_RESOLUTION,
+ HCI_ENABLE_LL_PRIVACY,
HCI_CMD_PENDING,
HCI_FORCE_NO_MITM,
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 628831b15c0a..33d8458fdd4a 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -5230,6 +5230,7 @@ static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev,
le16_to_cpu(ev->supervision_timeout));
if (use_ll_privacy(hdev) &&
+ hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY) &&
hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
hci_req_disable_address_resolution(hdev);
}
diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index 70e077cc7dfa..435400a43a78 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -678,8 +678,10 @@ void hci_req_add_le_scan_disable(struct hci_request *req, bool rpa_le_conn)
/* Disable address resolution */
if (use_ll_privacy(hdev) &&
+ hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY) &&
hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION) && !rpa_le_conn) {
__u8 enable = 0x00;
+
hci_req_add(req, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, 1, &enable);
}
}
@@ -870,8 +872,11 @@ static void hci_req_start_scan(struct hci_request *req, u8 type, u16 interval,
return;
}
- if (use_ll_privacy(hdev) && addr_resolv) {
+ if (use_ll_privacy(hdev) &&
+ hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY) &&
+ addr_resolv) {
u8 enable = 0x01;
+
hci_req_add(req, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, 1, &enable);
}
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 47bcfe2fb14c..4ec0fee80344 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -795,10 +795,15 @@ static u32 get_supported_settings(struct hci_dev *hdev)
if (lmp_le_capable(hdev)) {
settings |= MGMT_SETTING_LE;
- settings |= MGMT_SETTING_ADVERTISING;
settings |= MGMT_SETTING_SECURE_CONN;
settings |= MGMT_SETTING_PRIVACY;
settings |= MGMT_SETTING_STATIC_ADDRESS;
+
+ /* When the experimental feature for LL Privacy support is
+ * enabled, then advertising is no longer supported.
+ */
+ if (!hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
+ settings |= MGMT_SETTING_ADVERTISING;
}
if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
@@ -3759,10 +3764,16 @@ static const u8 simult_central_periph_uuid[16] = {
0x96, 0x46, 0xc0, 0x42, 0xb5, 0x10, 0x1b, 0x67,
};
+/* 15c0a148-c273-11ea-b3de-0242ac130004 */
+static const u8 rpa_resolution_uuid[16] = {
+ 0x04, 0x00, 0x13, 0xac, 0x42, 0x02, 0xde, 0xb3,
+ 0xea, 0x11, 0x73, 0xc2, 0x48, 0xa1, 0xc0, 0x15,
+};
+
static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev,
void *data, u16 data_len)
{
- char buf[44];
+ char buf[62]; /* Enough space for 3 features */
struct mgmt_rp_read_exp_features_info *rp = (void *)buf;
u16 idx = 0;
u32 flags;
@@ -3795,6 +3806,17 @@ static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev,
idx++;
}
+ if (hdev && use_ll_privacy(hdev)) {
+ if (hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
+ flags = BIT(0) | BIT(1);
+ else
+ flags = BIT(1);
+
+ memcpy(rp->features[idx].uuid, rpa_resolution_uuid, 16);
+ rp->features[idx].flags = cpu_to_le32(flags);
+ idx++;
+ }
+
rp->feature_count = cpu_to_le16(idx);
/* After reading the experimental features information, enable
@@ -3807,6 +3829,21 @@ static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev,
0, rp, sizeof(*rp) + (20 * idx));
}
+static int exp_ll_privacy_feature_changed(bool enabled, struct hci_dev *hdev,
+ struct sock *skip)
+{
+ struct mgmt_ev_exp_feature_changed ev;
+
+ memset(&ev, 0, sizeof(ev));
+ memcpy(ev.uuid, rpa_resolution_uuid, 16);
+ ev.flags = cpu_to_le32((enabled ? BIT(0) : 0) | BIT(1));
+
+ return mgmt_limited_event(MGMT_EV_EXP_FEATURE_CHANGED, hdev,
+ &ev, sizeof(ev),
+ HCI_MGMT_EXP_FEATURE_EVENTS, skip);
+
+}
+
#ifdef CONFIG_BT_FEATURE_DEBUG
static int exp_debug_feature_changed(bool enabled, struct sock *skip)
{
@@ -3845,6 +3882,16 @@ static int set_exp_feature(struct sock *sk, struct hci_dev *hdev,
}
#endif
+ if (hdev && use_ll_privacy(hdev) && !hdev_is_powered(hdev)) {
+ bool changed = hci_dev_test_flag(hdev,
+ HCI_ENABLE_LL_PRIVACY);
+
+ hci_dev_clear_flag(hdev, HCI_ENABLE_LL_PRIVACY);
+
+ if (changed)
+ exp_ll_privacy_feature_changed(false, hdev, sk);
+ }
+
hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS);
return mgmt_cmd_complete(sk, hdev ? hdev->id : MGMT_INDEX_NONE,
@@ -3895,6 +3942,69 @@ static int set_exp_feature(struct sock *sk, struct hci_dev *hdev,
}
#endif
+ if (!memcmp(cp->uuid, rpa_resolution_uuid, 16)) {
+ bool val, changed;
+ int err;
+ u32 flags;
+
+ /* Command requires to use the controller index */
+ if (!hdev)
+ return mgmt_cmd_status(sk, MGMT_INDEX_NONE,
+ MGMT_OP_SET_EXP_FEATURE,
+ MGMT_STATUS_INVALID_INDEX);
+
+ /* Changes can only be made when controller is powered down */
+ if (hdev_is_powered(hdev))
+ return mgmt_cmd_status(sk, hdev->id,
+ MGMT_OP_SET_EXP_FEATURE,
+ MGMT_STATUS_NOT_POWERED);
+
+ /* Parameters are limited to a single octet */
+ if (data_len != MGMT_SET_EXP_FEATURE_SIZE + 1)
+ return mgmt_cmd_status(sk, hdev->id,
+ MGMT_OP_SET_EXP_FEATURE,
+ MGMT_STATUS_INVALID_PARAMS);
+
+ /* Only boolean on/off is supported */
+ if (cp->param[0] != 0x00 && cp->param[0] != 0x01)
+ return mgmt_cmd_status(sk, hdev->id,
+ MGMT_OP_SET_EXP_FEATURE,
+ MGMT_STATUS_INVALID_PARAMS);
+
+ val = !!cp->param[0];
+
+ if (val) {
+ changed = !hci_dev_test_flag(hdev,
+ HCI_ENABLE_LL_PRIVACY);
+ hci_dev_set_flag(hdev, HCI_ENABLE_LL_PRIVACY);
+ hci_dev_clear_flag(hdev, HCI_ADVERTISING);
+
+ /* Enable LL privacy + supported settings changed */
+ flags = BIT(0) | BIT(1);
+ } else {
+ changed = hci_dev_test_flag(hdev,
+ HCI_ENABLE_LL_PRIVACY);
+ hci_dev_clear_flag(hdev, HCI_ENABLE_LL_PRIVACY);
+
+ /* Disable LL privacy + supported settings changed */
+ flags = BIT(1);
+ }
+
+ memcpy(rp.uuid, rpa_resolution_uuid, 16);
+ rp.flags = cpu_to_le32(flags);
+
+ hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS);
+
+ err = mgmt_cmd_complete(sk, hdev->id,
+ MGMT_OP_SET_EXP_FEATURE, 0,
+ &rp, sizeof(rp));
+
+ if (changed)
+ exp_ll_privacy_feature_changed(val, hdev, sk);
+
+ return err;
+ }
+
return mgmt_cmd_status(sk, hdev ? hdev->id : MGMT_INDEX_NONE,
MGMT_OP_SET_EXP_FEATURE,
MGMT_STATUS_NOT_SUPPORTED);
@@ -5040,6 +5150,13 @@ static int set_advertising(struct sock *sk, struct hci_dev *hdev, void *data,
return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
status);
+ /* Enabling the experimental LL Privay support disables support for
+ * advertising.
+ */
+ if (hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
+ return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
+ MGMT_STATUS_NOT_SUPPORTED);
+
if (cp->val != 0x00 && cp->val != 0x01 && cp->val != 0x02)
return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
MGMT_STATUS_INVALID_PARAMS);
@@ -7112,6 +7229,13 @@ static int read_adv_features(struct sock *sk, struct hci_dev *hdev,
return mgmt_cmd_status(sk, hdev->id, MGMT_OP_READ_ADV_FEATURES,
MGMT_STATUS_REJECTED);
+ /* Enabling the experimental LL Privay support disables support for
+ * advertising.
+ */
+ if (hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
+ return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
+ MGMT_STATUS_NOT_SUPPORTED);
+
hci_dev_lock(hdev);
rp_len = sizeof(*rp) + hdev->adv_instance_cnt;
@@ -7315,6 +7439,13 @@ static int add_advertising(struct sock *sk, struct hci_dev *hdev,
return mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
status);
+ /* Enabling the experimental LL Privay support disables support for
+ * advertising.
+ */
+ if (hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
+ return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
+ MGMT_STATUS_NOT_SUPPORTED);
+
if (cp->instance < 1 || cp->instance > HCI_MAX_ADV_INSTANCES)
return mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
MGMT_STATUS_INVALID_PARAMS);
@@ -7479,6 +7610,13 @@ static int remove_advertising(struct sock *sk, struct hci_dev *hdev,
bt_dev_dbg(hdev, "sock %p", sk);
+ /* Enabling the experimental LL Privay support disables support for
+ * advertising.
+ */
+ if (hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
+ return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
+ MGMT_STATUS_NOT_SUPPORTED);
+
hci_dev_lock(hdev);
if (cp->instance && !hci_find_adv_instance(hdev, cp->instance)) {
--
2.26.2
