From: Johan Hedberg <johan.hedberg@xxxxxxxxx>
This patch adds support for setting basing LE advertising data. The
three elements supported for now are the advertising flags, the TX power
and the friendly name.
Signed-off-by: Johan Hedberg <johan.hedberg@xxxxxxxxx>
---
include/net/bluetooth/hci.h | 15 ++++++
include/net/bluetooth/hci_core.h | 2 +
net/bluetooth/hci_event.c | 9 ++++
net/bluetooth/mgmt.c | 102 ++++++++++++++++++++++++++++++++++++--
4 files changed, 125 insertions(+), 3 deletions(-)
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index a633da0..f850e94 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -335,6 +335,13 @@ enum {
#define EIR_SSP_RAND_R 0x0F /* Simple Pairing Randomizer R */
#define EIR_DEVICE_ID 0x10 /* device ID */
+/* Low Energy Advertising Flags */
+#define LE_AD_LIMITED 0x01 /* Limited Discoverable */
+#define LE_AD_GENERAL 0x02 /* General Discoverable */
+#define LE_AD_NO_BREDR 0x04 /* BR/EDR not supported */
+#define LE_AD_SIM_LE_BREDR_CTRL 0x08 /* Simultaneous LE & BR/EDR Controller */
+#define LE_AD_SIM_LE_BREDR_HOST 0x10 /* Simultaneous LE & BR/EDR Host */
+
/* ----- HCI Commands ---- */
#define HCI_OP_NOP 0x0000
@@ -939,6 +946,14 @@ struct hci_rp_le_read_adv_tx_power {
__s8 tx_power;
} __packed;
+#define HCI_MAX_AD_LENGTH 31
+
+#define HCI_OP_LE_SET_ADV_DATA 0x2008
+struct hci_cp_le_set_adv_data {
+ __u8 length;
+ __u8 data[HCI_MAX_AD_LENGTH];
+} __packed;
+
#define HCI_OP_LE_SET_ADV_ENABLE 0x200a
#define HCI_OP_LE_SET_SCAN_PARAM 0x200b
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 9d7e94e..0981d3c 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -279,6 +279,8 @@ struct hci_dev {
struct le_scan_params le_scan_params;
__s8 adv_tx_power;
+ __u8 adv_data[HCI_MAX_AD_LENGTH];
+ __u8 adv_data_len;
int (*open)(struct hci_dev *hdev);
int (*close)(struct hci_dev *hdev);
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index ed6b1e2..3691251 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1108,6 +1108,15 @@ static void hci_cc_le_read_adv_tx_power(struct hci_dev *hdev,
if (!rp->status)
hdev->adv_tx_power = rp->tx_power;
+ if (hdev->adv_data_len > 0) {
+ struct hci_cp_le_set_adv_data cp;
+
+ memcpy(cp.data, hdev->adv_data, sizeof(cp.data));
+ cp.length = cpu_to_le16(hdev->adv_data_len);
+
+ hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
+ }
+
hci_req_complete(hdev, HCI_OP_LE_READ_ADV_TX_POWER, rp->status);
}
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 6770835..98c776a 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -593,6 +593,93 @@ static int update_eir(struct hci_dev *hdev)
return hci_send_cmd(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
}
+static u16 create_ad(struct hci_dev *hdev, u8 *data)
+{
+ u8 *ptr = data;
+ u16 ad_len = 0;
+ size_t name_len;
+ u8 flags = 0;
+
+ if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
+ flags |= LE_AD_GENERAL;
+
+ if (!lmp_bredr_capable(hdev))
+ flags |= LE_AD_NO_BREDR;
+
+ if (lmp_le_br_capable(hdev))
+ flags |= LE_AD_SIM_LE_BREDR_CTRL;
+
+ if (lmp_host_le_br_capable(hdev))
+ flags |= LE_AD_SIM_LE_BREDR_HOST;
+
+ if (flags) {
+ BT_DBG("adv flags 0x%02x", flags);
+
+ ptr[0] = 2;
+ ptr[1] = EIR_FLAGS;
+ ptr[2] = flags;
+
+ ad_len += 3;
+ ptr += 3;
+ }
+
+ if (hdev->adv_tx_power) {
+ ptr[0] = 2;
+ ptr[1] = EIR_TX_POWER;
+ ptr[2] = (u8) hdev->adv_tx_power;
+
+ ad_len += 3;
+ ptr += 3;
+ }
+
+ name_len = strlen(hdev->dev_name);
+ if (name_len > 0) {
+ size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
+
+ if (name_len > max_len) {
+ name_len = max_len;
+ ptr[1] = EIR_NAME_SHORT;
+ } else
+ ptr[1] = EIR_NAME_COMPLETE;
+
+ ptr[0] = name_len + 1;
+
+ memcpy(ptr + 2, hdev->dev_name, name_len);
+
+ ad_len += (name_len + 2);
+ ptr += (name_len + 2);
+ }
+
+ return ad_len;
+}
+
+static int update_ad(struct hci_dev *hdev)
+{
+ struct hci_cp_le_set_adv_data cp;
+ u16 len;
+
+ if (!hdev_is_powered(hdev))
+ return 0;
+
+ if (!lmp_le_capable(hdev))
+ return 0;
+
+ memset(&cp, 0, sizeof(cp));
+
+ len = create_ad(hdev, cp.data);
+
+ if (hdev->adv_data_len == len &&
+ memcmp(cp.data, hdev->adv_data, len) == 0)
+ return 0;
+
+ memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
+ hdev->adv_data_len = len;
+
+ cp.length = cpu_to_le16(len);
+
+ return hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
+}
+
static u8 get_service_classes(struct hci_dev *hdev)
{
struct bt_uuid *uuid;
@@ -1279,8 +1366,10 @@ static int set_le(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
/* If we're switching away from or into peripheral role toggle
* the corresponding flag
*/
- if (old_mode == MGMT_LE_PERIPHERAL || new_mode == MGMT_LE_PERIPHERAL)
+ if (old_mode == MGMT_LE_PERIPHERAL || new_mode == MGMT_LE_PERIPHERAL) {
change_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags);
+ update_ad(hdev);
+ }
if (!hdev_is_powered(hdev)) {
if (old_mode == MGMT_LE_OFF || new_mode == MGMT_LE_OFF)
@@ -3002,6 +3091,7 @@ int mgmt_powered(struct hci_dev *hdev, u8 powered)
update_name(hdev, hdev->dev_name);
update_eir(hdev);
}
+ update_ad(hdev);
} else {
u8 status = MGMT_STATUS_NOT_POWERED;
mgmt_pending_foreach(0, hdev, cmd_status_rsp, &status);
@@ -3582,12 +3672,14 @@ send_event:
err = mgmt_event(MGMT_EV_LOCAL_NAME_CHANGED, hdev, &ev,
sizeof(ev), cmd ? cmd->sk : NULL);
- /* EIR is taken care of separately when powering on the
+ /* EIR and AD are taken care of separately when powering on the
* adapter so only update them here if this is a name change
* unrelated to power on.
*/
- if (!test_bit(HCI_INIT, &hdev->flags))
+ if (!test_bit(HCI_INIT, &hdev->flags)) {
update_eir(hdev);
+ update_ad(hdev);
+ }
failed:
if (cmd)
@@ -3662,6 +3754,8 @@ int mgmt_le_enable_complete(struct hci_dev *hdev, u8 enable, u8 status)
if (enable && cp->val == MGMT_LE_PERIPHERAL)
return hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE,
sizeof(enable), &enable);
+ else
+ update_ad(hdev);
send_settings_rsp(cmd->sk, cmd->opcode, hdev);
list_del(&cmd->list);
@@ -3687,6 +3781,8 @@ int mgmt_le_adv_enable_complete(struct hci_dev *hdev, u8 enable, u8 status)
mgmt_pending_foreach(MGMT_OP_SET_LE, hdev, cmd_status_rsp,
&mgmt_err);
+ update_ad(hdev);
+
return 0;
}
--
1.7.10.4
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