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Bluetooth: Refactor append name and appearance 

Use eir_append_data to remove code duplication.

Signed-off-by: Michał Narajowski <michal.narajowski@codecoup.pl>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Michał Narajowski 2016-10-05 12:28:27 +02:00 committed by Marcel Holtmann
parent 7ddb30c747
commit 1b42206665
3 changed files with 38 additions and 50 deletions
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44
net/bluetooth/hci_request.c
View File

@ -21,8 +21,6 @@
SOFTWARE IS DISCLAIMED.
*/
#include <asm/unaligned.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include <net/bluetooth/mgmt.h>
@ -992,46 +990,39 @@ static u8 append_local_name(struct hci_dev *hdev, u8 *ptr, u8 ad_len)
/* complete name fits and is eq to max short name len or smaller */
if (complete_len <= max_len &&
complete_len <= HCI_MAX_SHORT_NAME_LENGTH) {
ptr[0] = complete_len + 1;
ptr[1] = EIR_NAME_COMPLETE;
memcpy(ptr + 2, hdev->dev_name, complete_len);
return ad_len + complete_len + 2;
return eir_append_data(ptr, ad_len, EIR_NAME_COMPLETE,
hdev->dev_name, complete_len);
}
/* short name set and fits */
if (short_len && short_len <= max_len) {
ptr[0] = short_len + 1;
ptr[1] = EIR_NAME_SHORT;
memcpy(ptr + 2, hdev->short_name, short_len);
return ad_len + short_len + 2;
return eir_append_data(ptr, ad_len, EIR_NAME_SHORT,
hdev->short_name, short_len);
}
/* no short name set so shorten complete name */
if (!short_len) {
ptr[0] = max_len + 1;
ptr[1] = EIR_NAME_SHORT;
memcpy(ptr + 2, hdev->dev_name, max_len);
return ad_len + max_len + 2;
return eir_append_data(ptr, ad_len, EIR_NAME_SHORT,
hdev->dev_name, max_len);
}
return ad_len;
}
static u8 append_appearance(struct hci_dev *hdev, u8 *ptr, u8 ad_len)
{
return eir_append_le16(ptr, ad_len, EIR_APPEARANCE, hdev->appearance);
}
static u8 create_default_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
{
u8 scan_rsp_len = 0;
if (hdev->appearance) {
ptr[0] = 3;
ptr[1] = EIR_APPEARANCE;
put_unaligned_le16(hdev->appearance, ptr + 2);
scan_rsp_len += 4;
scan_rsp_len = append_appearance(hdev, ptr, scan_rsp_len);
}
return append_local_name(hdev, ptr + scan_rsp_len, scan_rsp_len);
return append_local_name(hdev, ptr, scan_rsp_len);
}
static u8 create_instance_scan_rsp_data(struct hci_dev *hdev, u8 instance,
@ -1048,18 +1039,13 @@ static u8 create_instance_scan_rsp_data(struct hci_dev *hdev, u8 instance,
instance_flags = adv_instance->flags;
if ((instance_flags & MGMT_ADV_FLAG_APPEARANCE) && hdev->appearance) {
ptr[0] = 3;
ptr[1] = EIR_APPEARANCE;
put_unaligned_le16(hdev->appearance, ptr + 2);
scan_rsp_len += 4;
ptr += 4;
scan_rsp_len = append_appearance(hdev, ptr, scan_rsp_len);
}
memcpy(ptr, adv_instance->scan_rsp_data,
memcpy(&ptr[scan_rsp_len], adv_instance->scan_rsp_data,
adv_instance->scan_rsp_len);
scan_rsp_len += adv_instance->scan_rsp_len;
ptr += adv_instance->scan_rsp_len;
if (instance_flags & MGMT_ADV_FLAG_LOCAL_NAME)
scan_rsp_len = append_local_name(hdev, ptr, scan_rsp_len);

23
net/bluetooth/hci_request.h
View File

@ -20,6 +20,8 @@
SOFTWARE IS DISCLAIMED.
*/
#include <asm/unaligned.h>
#define hci_req_sync_lock(hdev) mutex_lock(&hdev->req_lock)
#define hci_req_sync_unlock(hdev) mutex_unlock(&hdev->req_lock)
@ -103,3 +105,24 @@ static inline void hci_update_background_scan(struct hci_dev *hdev)
void hci_request_setup(struct hci_dev *hdev);
void hci_request_cancel_all(struct hci_dev *hdev);
static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type,
u8 *data, u8 data_len)
{
eir[eir_len++] = sizeof(type) + data_len;
eir[eir_len++] = type;
memcpy(&eir[eir_len], data, data_len);
eir_len += data_len;
return eir_len;
}
static inline u16 eir_append_le16(u8 *eir, u16 eir_len, u8 type, u16 data)
{
eir[eir_len++] = sizeof(type) + sizeof(data);
eir[eir_len++] = type;
put_unaligned_le16(data, &eir[eir_len]);
eir_len += sizeof(data);
return eir_len;
}

21
net/bluetooth/mgmt.c
View File

@ -867,27 +867,6 @@ static int read_controller_info(struct sock *sk, struct hci_dev *hdev,
sizeof(rp));
}
static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type, u8 *data,
u8 data_len)
{
eir[eir_len++] = sizeof(type) + data_len;
eir[eir_len++] = type;
memcpy(&eir[eir_len], data, data_len);
eir_len += data_len;
return eir_len;
}
static inline u16 eir_append_le16(u8 *eir, u16 eir_len, u8 type, u16 data)
{
eir[eir_len++] = sizeof(type) + sizeof(data);
eir[eir_len++] = type;
put_unaligned_le16(data, &eir[eir_len]);
eir_len += sizeof(data);
return eir_len;
}
static u16 append_eir_data_to_buf(struct hci_dev *hdev, u8 *eir)
{
u16 eir_len = 0;