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902f089da6
bluez/attrib/att.h
Vinicius Costa Gomes 9111ffe1c0 att: Replace ATT_MAX_MTU with ATT_MAX_VALUE_LEN 
ATT has the concept that an attribute value has a maximum length and we
weren't keeping track of this.
2012-10-11 08:46:33 +02:00

280 lines
9.2 KiB
C
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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2010 Nokia Corporation
* Copyright (C) 2010 Marcel Holtmann <marcel@holtmann.org>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
/* Attribute Protocol Opcodes */
#define ATT_OP_ERROR 0x01
#define ATT_OP_MTU_REQ 0x02
#define ATT_OP_MTU_RESP 0x03
#define ATT_OP_FIND_INFO_REQ 0x04
#define ATT_OP_FIND_INFO_RESP 0x05
#define ATT_OP_FIND_BY_TYPE_REQ 0x06
#define ATT_OP_FIND_BY_TYPE_RESP 0x07
#define ATT_OP_READ_BY_TYPE_REQ 0x08
#define ATT_OP_READ_BY_TYPE_RESP 0x09
#define ATT_OP_READ_REQ 0x0A
#define ATT_OP_READ_RESP 0x0B
#define ATT_OP_READ_BLOB_REQ 0x0C
#define ATT_OP_READ_BLOB_RESP 0x0D
#define ATT_OP_READ_MULTI_REQ 0x0E
#define ATT_OP_READ_MULTI_RESP 0x0F
#define ATT_OP_READ_BY_GROUP_REQ 0x10
#define ATT_OP_READ_BY_GROUP_RESP 0x11
#define ATT_OP_WRITE_REQ 0x12
#define ATT_OP_WRITE_RESP 0x13
#define ATT_OP_WRITE_CMD 0x52
#define ATT_OP_PREP_WRITE_REQ 0x16
#define ATT_OP_PREP_WRITE_RESP 0x17
#define ATT_OP_EXEC_WRITE_REQ 0x18
#define ATT_OP_EXEC_WRITE_RESP 0x19
#define ATT_OP_HANDLE_NOTIFY 0x1B
#define ATT_OP_HANDLE_IND 0x1D
#define ATT_OP_HANDLE_CNF 0x1E
#define ATT_OP_SIGNED_WRITE_CMD 0xD2
/* Error codes for Error response PDU */
#define ATT_ECODE_INVALID_HANDLE 0x01
#define ATT_ECODE_READ_NOT_PERM 0x02
#define ATT_ECODE_WRITE_NOT_PERM 0x03
#define ATT_ECODE_INVALID_PDU 0x04
#define ATT_ECODE_AUTHENTICATION 0x05
#define ATT_ECODE_REQ_NOT_SUPP 0x06
#define ATT_ECODE_INVALID_OFFSET 0x07
#define ATT_ECODE_AUTHORIZATION 0x08
#define ATT_ECODE_PREP_QUEUE_FULL 0x09
#define ATT_ECODE_ATTR_NOT_FOUND 0x0A
#define ATT_ECODE_ATTR_NOT_LONG 0x0B
#define ATT_ECODE_INSUFF_ENCR_KEY_SIZE 0x0C
#define ATT_ECODE_INVAL_ATTR_VALUE_LEN 0x0D
#define ATT_ECODE_UNLIKELY 0x0E
#define ATT_ECODE_INSUFF_ENC 0x0F
#define ATT_ECODE_UNSUPP_GRP_TYPE 0x10
#define ATT_ECODE_INSUFF_RESOURCES 0x11
/* Application error */
#define ATT_ECODE_IO 0x80
#define ATT_ECODE_TIMEOUT 0x81
#define ATT_ECODE_ABORTED 0x82
/* Characteristic Property bit field */
#define ATT_CHAR_PROPER_BROADCAST 0x01
#define ATT_CHAR_PROPER_READ 0x02
#define ATT_CHAR_PROPER_WRITE_WITHOUT_RESP 0x04
#define ATT_CHAR_PROPER_WRITE 0x08
#define ATT_CHAR_PROPER_NOTIFY 0x10
#define ATT_CHAR_PROPER_INDICATE 0x20
#define ATT_CHAR_PROPER_AUTH 0x40
#define ATT_CHAR_PROPER_EXT_PROPER 0x80
#define ATT_MAX_VALUE_LEN 512
#define ATT_DEFAULT_L2CAP_MTU 48
#define ATT_DEFAULT_LE_MTU 23
#define ATT_CID 4
#define ATT_PSM 31
/* Flags for Execute Write Request Operation */
#define ATT_CANCEL_ALL_PREP_WRITES 0x00
#define ATT_WRITE_ALL_PREP_WRITES 0x01
/* Find Information Response Formats */
#define ATT_FIND_INFO_RESP_FMT_16BIT 0x01
#define ATT_FIND_INFO_RESP_FMT_128BIT 0x02
struct att_data_list {
uint16_t num;
uint16_t len;
uint8_t **data;
};
struct att_range {
uint16_t start;
uint16_t end;
};
/* These functions do byte conversion */
static inline uint8_t att_get_u8(const void *ptr)
{
const uint8_t *u8_ptr = ptr;
return bt_get_unaligned(u8_ptr);
}
static inline uint16_t att_get_u16(const void *ptr)
{
const uint16_t *u16_ptr = ptr;
return btohs(bt_get_unaligned(u16_ptr));
}
static inline uint32_t att_get_u32(const void *ptr)
{
const uint32_t *u32_ptr = ptr;
return btohl(bt_get_unaligned(u32_ptr));
}
static inline uint128_t att_get_u128(const void *ptr)
{
const uint128_t *u128_ptr = ptr;
uint128_t dst;
btoh128(u128_ptr, &dst);
return dst;
}
static inline void att_put_u8(uint8_t src, void *dst)
{
bt_put_unaligned(src, (uint8_t *) dst);
}
static inline void att_put_u16(uint16_t src, void *dst)
{
bt_put_unaligned(htobs(src), (uint16_t *) dst);
}
static inline void att_put_u32(uint32_t src, void *dst)
{
bt_put_unaligned(htobl(src), (uint32_t *) dst);
}
static inline void att_put_u128(uint128_t src, void *dst)
{
uint128_t *d128 = dst;
htob128(&src, d128);
}
static inline void att_put_uuid16(bt_uuid_t src, void *dst)
{
att_put_u16(src.value.u16, dst);
}
static inline void att_put_uuid128(bt_uuid_t src, void *dst)
{
att_put_u128(src.value.u128, dst);
}
static inline void att_put_uuid(bt_uuid_t src, void *dst)
{
if (src.type == BT_UUID16)
att_put_uuid16(src, dst);
else
att_put_uuid128(src, dst);
}
static inline bt_uuid_t att_get_uuid16(const void *ptr)
{
bt_uuid_t uuid;
bt_uuid16_create(&uuid, att_get_u16(ptr));
return uuid;
}
static inline bt_uuid_t att_get_uuid128(const void *ptr)
{
bt_uuid_t uuid;
uint128_t value;
value = att_get_u128(ptr);
bt_uuid128_create(&uuid, value);
return uuid;
}
struct att_data_list *att_data_list_alloc(uint16_t num, uint16_t len);
void att_data_list_free(struct att_data_list *list);
const char *att_ecode2str(uint8_t status);
uint16_t enc_read_by_grp_req(uint16_t start, uint16_t end, bt_uuid_t *uuid,
uint8_t *pdu, size_t len);
uint16_t dec_read_by_grp_req(const uint8_t *pdu, size_t len, uint16_t *start,
uint16_t *end, bt_uuid_t *uuid);
uint16_t enc_read_by_grp_resp(struct att_data_list *list, uint8_t *pdu,
size_t len);
uint16_t enc_find_by_type_req(uint16_t start, uint16_t end, bt_uuid_t *uuid,
const uint8_t *value, size_t vlen, uint8_t *pdu,
size_t len);
uint16_t dec_find_by_type_req(const uint8_t *pdu, size_t len, uint16_t *start,
uint16_t *end, bt_uuid_t *uuid, uint8_t *value, size_t *vlen);
uint16_t enc_find_by_type_resp(GSList *ranges, uint8_t *pdu, size_t len);
GSList *dec_find_by_type_resp(const uint8_t *pdu, size_t len);
struct att_data_list *dec_read_by_grp_resp(const uint8_t *pdu, size_t len);
uint16_t enc_read_by_type_req(uint16_t start, uint16_t end, bt_uuid_t *uuid,
uint8_t *pdu, size_t len);
uint16_t dec_read_by_type_req(const uint8_t *pdu, size_t len, uint16_t *start,
uint16_t *end, bt_uuid_t *uuid);
uint16_t enc_read_by_type_resp(struct att_data_list *list, uint8_t *pdu,
size_t len);
uint16_t enc_write_cmd(uint16_t handle, const uint8_t *value, size_t vlen,
uint8_t *pdu, size_t len);
uint16_t dec_write_cmd(const uint8_t *pdu, size_t len, uint16_t *handle,
uint8_t *value, size_t *vlen);
struct att_data_list *dec_read_by_type_resp(const uint8_t *pdu, size_t len);
uint16_t enc_write_req(uint16_t handle, const uint8_t *value, size_t vlen,
uint8_t *pdu, size_t len);
uint16_t dec_write_req(const uint8_t *pdu, size_t len, uint16_t *handle,
uint8_t *value, size_t *vlen);
uint16_t enc_write_resp(uint8_t *pdu, size_t len);
uint16_t dec_write_resp(const uint8_t *pdu, size_t len);
uint16_t enc_read_req(uint16_t handle, uint8_t *pdu, size_t len);
uint16_t enc_read_blob_req(uint16_t handle, uint16_t offset, uint8_t *pdu,
size_t len);
uint16_t dec_read_req(const uint8_t *pdu, size_t len, uint16_t *handle);
uint16_t dec_read_blob_req(const uint8_t *pdu, size_t len, uint16_t *handle,
uint16_t *offset);
uint16_t enc_read_resp(uint8_t *value, size_t vlen, uint8_t *pdu, size_t len);
uint16_t enc_read_blob_resp(uint8_t *value, size_t vlen, uint16_t offset,
uint8_t *pdu, size_t len);
ssize_t dec_read_resp(const uint8_t *pdu, size_t len, uint8_t *value,
size_t vlen);
uint16_t enc_error_resp(uint8_t opcode, uint16_t handle, uint8_t status,
uint8_t *pdu, size_t len);
uint16_t enc_find_info_req(uint16_t start, uint16_t end, uint8_t *pdu,
size_t len);
uint16_t dec_find_info_req(const uint8_t *pdu, size_t len, uint16_t *start,
uint16_t *end);
uint16_t enc_find_info_resp(uint8_t format, struct att_data_list *list,
uint8_t *pdu, size_t len);
struct att_data_list *dec_find_info_resp(const uint8_t *pdu, size_t len,
uint8_t *format);
uint16_t enc_notification(uint16_t handle, uint8_t *value, size_t vlen,
uint8_t *pdu, size_t len);
uint16_t enc_indication(uint16_t handle, uint8_t *value, size_t vlen,
uint8_t *pdu, size_t len);
uint16_t dec_indication(const uint8_t *pdu, size_t len, uint16_t *handle,
uint8_t *value, size_t vlen);
uint16_t enc_confirmation(uint8_t *pdu, size_t len);
uint16_t enc_mtu_req(uint16_t mtu, uint8_t *pdu, size_t len);
uint16_t dec_mtu_req(const uint8_t *pdu, size_t len, uint16_t *mtu);
uint16_t enc_mtu_resp(uint16_t mtu, uint8_t *pdu, size_t len);
uint16_t dec_mtu_resp(const uint8_t *pdu, size_t len, uint16_t *mtu);
uint16_t enc_prep_write_req(uint16_t handle, uint16_t offset,
const uint8_t *value, size_t vlen,
uint8_t *pdu, size_t len);
uint16_t dec_prep_write_resp(const uint8_t *pdu, size_t len, uint16_t *handle,
uint16_t *offset, uint8_t *value,
size_t *vlen);
uint16_t enc_exec_write_req(uint8_t flags, uint8_t *pdu, size_t len);
uint16_t dec_exec_write_resp(const uint8_t *pdu, size_t len);
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