linux/net/bluetooth/eir.h
Luiz Augusto von Dentz 01ce70b0a2 Bluetooth: eir: Move EIR/Adv Data functions to its own file
This moves functions manipulating EIR/Adv Data to its own file so it
can be reused by other files.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2021-09-21 10:37:33 +02:00

73 lines
1.4 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2021 Intel Corporation
*/
void eir_create(struct hci_dev *hdev, u8 *data);
u8 eir_create_adv_data(struct hci_dev *hdev, u8 instance, u8 *ptr);
u8 eir_create_scan_rsp(struct hci_dev *hdev, u8 instance, u8 *ptr);
u8 eir_append_local_name(struct hci_dev *hdev, u8 *eir, u8 ad_len);
u8 eir_append_appearance(struct hci_dev *hdev, u8 *ptr, u8 ad_len);
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 inline void *eir_get_data(u8 *eir, size_t eir_len, u8 type,
size_t *data_len)
{
size_t parsed = 0;
if (eir_len < 2)
return NULL;
while (parsed < eir_len - 1) {
u8 field_len = eir[0];
if (field_len == 0)
break;
parsed += field_len + 1;
if (parsed > eir_len)
break;
if (eir[1] != type) {
eir += field_len + 1;
continue;
}
/* Zero length data */
if (field_len == 1)
return NULL;
if (data_len)
*data_len = field_len - 1;
return &eir[2];
}
return NULL;
}