From: Johan Hedberg <johan.hedberg@xxxxxxxxx>
This patch adds automated creation of the local EIR data based on what
16-bit UUIDs are registered and what the device name is. This should
cover the majority use cases, however things like 32/128-bit UUIDs, TX
power and Device ID will need to be added later to be on par with what
bluetoothd is capable of doing (without the Management interface).
Signed-off-by: Johan Hedberg <johan.hedberg@xxxxxxxxx>
---
v2: Updated to assume that the UUIDs are in little endian byte order
like like all other data types in the management interface.
include/net/bluetooth/hci.h | 8 ++
include/net/bluetooth/hci_core.h | 1 +
net/bluetooth/mgmt.c | 163 ++++++++++++++++++++++++++++++++++++++
3 files changed, 172 insertions(+), 0 deletions(-)
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index b989a8c..6846ec0 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -614,6 +614,14 @@ struct hci_cp_host_buffer_size {
#define HCI_OP_WRITE_INQUIRY_MODE 0x0c45
+#define HCI_MAX_EIR_LENGTH 240
+
+#define HCI_OP_WRITE_EIR 0x0c52
+struct hci_cp_write_eir {
+ uint8_t fec;
+ uint8_t data[HCI_MAX_EIR_LENGTH];
+} __packed;
+
#define HCI_OP_READ_SSP_MODE 0x0c55
struct hci_rp_read_ssp_mode {
__u8 status;
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 87bff51..3b2f09d 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -102,6 +102,7 @@ struct hci_dev {
__u8 dev_type;
bdaddr_t bdaddr;
__u8 dev_name[HCI_MAX_NAME_LENGTH];
+ __u8 eir[HCI_MAX_EIR_LENGTH];
__u8 dev_class[3];
__u8 major_class;
__u8 minor_class;
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index a42dc8c..62055c9 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -544,6 +544,150 @@ failed:
return err;
}
+#define EIR_FLAGS 0x01 /* flags */
+#define EIR_UUID16_SOME 0x02 /* 16-bit UUID, more available */
+#define EIR_UUID16_ALL 0x03 /* 16-bit UUID, all listed */
+#define EIR_UUID32_SOME 0x04 /* 32-bit UUID, more available */
+#define EIR_UUID32_ALL 0x05 /* 32-bit UUID, all listed */
+#define EIR_UUID128_SOME 0x06 /* 128-bit UUID, more available */
+#define EIR_UUID128_ALL 0x07 /* 128-bit UUID, all listed */
+#define EIR_NAME_SHORT 0x08 /* shortened local name */
+#define EIR_NAME_COMPLETE 0x09 /* complete local name */
+#define EIR_TX_POWER 0x0A /* transmit power level */
+#define EIR_DEVICE_ID 0x10 /* device ID */
+
+#define PNP_INFO_SVCLASS_ID 0x1200
+
+static u8 bluetooth_base_uuid[] = {
+ 0xFB, 0x34, 0x9B, 0x5F, 0x80, 0x00, 0x00, 0x80,
+ 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+};
+
+static u16 get_uuid16(u8 *uuid128)
+{
+ u32 val;
+ int i;
+
+ for (i = 0; i < 12; i++) {
+ if (bluetooth_base_uuid[i] != uuid128[i])
+ return 0;
+ }
+
+ memcpy(&val, &uuid128[12], 4);
+
+ val = le32_to_cpu(val);
+ if (val > 0xffff)
+ return 0;
+
+ return (u16) val;
+}
+
+static void create_eir(struct hci_dev *hdev, u8 *data)
+{
+ u8 *ptr = data;
+ u16 eir_len = 0;
+ u16 uuid16_list[HCI_MAX_EIR_LENGTH / sizeof(u16)];
+ int i, truncated = 0;
+ struct list_head *p;
+ size_t name_len;
+
+ name_len = strlen(hdev->dev_name);
+
+ if (name_len > 0) {
+ /* EIR Data type */
+ if (name_len > 48) {
+ name_len = 48;
+ ptr[1] = EIR_NAME_SHORT;
+ } else
+ ptr[1] = EIR_NAME_COMPLETE;
+
+ /* EIR Data length */
+ ptr[0] = name_len + 1;
+
+ memcpy(ptr + 2, hdev->dev_name, name_len);
+
+ eir_len += (name_len + 2);
+ ptr += (name_len + 2);
+ }
+
+ memset(uuid16_list, 0, sizeof(uuid16_list));
+
+ /* Group all UUID16 types */
+ list_for_each(p, &hdev->uuids) {
+ struct bt_uuid *uuid = list_entry(p, struct bt_uuid, list);
+ u16 uuid16;
+
+ uuid16 = get_uuid16(uuid->uuid);
+ if (uuid16 == 0)
+ return;
+
+ if (uuid16 < 0x1100)
+ continue;
+
+ if (uuid16 == PNP_INFO_SVCLASS_ID)
+ continue;
+
+ /* Stop if not enough space to put next UUID */
+ if (eir_len + 2 + sizeof(u16) > HCI_MAX_EIR_LENGTH) {
+ truncated = 1;
+ break;
+ }
+
+ /* Check for duplicates */
+ for (i = 0; uuid16_list[i] != 0; i++)
+ if (uuid16_list[i] == uuid16)
+ break;
+
+ if (uuid16_list[i] == 0) {
+ uuid16_list[i] = uuid16;
+ eir_len += sizeof(u16);
+ }
+ }
+
+ if (uuid16_list[0] != 0) {
+ u8 *length = ptr;
+
+ /* EIR Data type */
+ ptr[1] = truncated ? EIR_UUID16_SOME : EIR_UUID16_ALL;
+
+ ptr += 2;
+ eir_len += 2;
+
+ for (i = 0; uuid16_list[i] != 0; i++) {
+ *ptr++ = (uuid16_list[i] & 0x00ff);
+ *ptr++ = (uuid16_list[i] & 0xff00) >> 8;
+ }
+
+ /* EIR Data length */
+ *length = (i * sizeof(u16)) + 1;
+ }
+}
+
+static int update_eir(struct hci_dev *hdev)
+{
+ struct hci_cp_write_eir cp;
+
+ if (!(hdev->features[6] & LMP_EXT_INQ))
+ return 0;
+
+ if (hdev->ssp_mode == 0)
+ return 0;
+
+ if (test_bit(HCI_SERVICE_CACHE, &hdev->flags))
+ return 0;
+
+ memset(&cp, 0, sizeof(cp));
+
+ create_eir(hdev, cp.data);
+
+ if (memcmp(cp.data, hdev->eir, sizeof(cp.data)) == 0)
+ return 0;
+
+ memcpy(hdev->eir, cp.data, sizeof(cp.data));
+
+ return hci_send_cmd(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
+}
+
static u8 get_service_classes(struct hci_dev *hdev)
{
struct list_head *p;
@@ -612,6 +756,10 @@ static int add_uuid(struct sock *sk, u16 index, unsigned char *data, u16 len)
if (err < 0)
goto failed;
+ err = update_eir(hdev);
+ if (err < 0)
+ goto failed;
+
err = cmd_complete(sk, index, MGMT_OP_ADD_UUID, NULL, 0);
failed:
@@ -668,6 +816,10 @@ static int remove_uuid(struct sock *sk, u16 index, unsigned char *data, u16 len)
if (err < 0)
goto unlock;
+ err = update_eir(hdev);
+ if (err < 0)
+ goto unlock;
+
err = cmd_complete(sk, index, MGMT_OP_REMOVE_UUID, NULL, 0);
unlock:
@@ -737,6 +889,8 @@ static int set_service_cache(struct sock *sk, u16 index, unsigned char *data,
} else {
clear_bit(HCI_SERVICE_CACHE, &hdev->flags);
err = update_class(hdev);
+ if (err == 0)
+ err = update_eir(hdev);
}
if (err == 0)
@@ -1822,6 +1976,7 @@ int mgmt_auth_failed(u16 index, bdaddr_t *bdaddr, u8 status)
int mgmt_set_local_name_complete(u16 index, u8 *name, u8 status)
{
struct pending_cmd *cmd;
+ struct hci_dev *hdev;
struct mgmt_cp_set_local_name ev;
int err;
@@ -1837,6 +1992,14 @@ int mgmt_set_local_name_complete(u16 index, u8 *name, u8 status)
goto failed;
}
+ hdev = hci_dev_get(index);
+ if (hdev) {
+ hci_dev_lock_bh(hdev);
+ update_eir(hdev);
+ hci_dev_unlock_bh(hdev);
+ hci_dev_put(hdev);
+ }
+
err = cmd_complete(cmd->sk, index, MGMT_OP_SET_LOCAL_NAME, &ev,
sizeof(ev));
if (err < 0)
--
1.7.4.1
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