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esp-idf/components/bt/bluedroid/stack/gatt/gatt_db.c

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component/bt: add bluedroid 1st version 1. add bluedroid 1st version 2. alarm adapter 3. task semaphore lock 4. other bugs resolved
2016-09-26 09:37:39 -04:00
/******************************************************************************
*
* Copyright (C) 2009-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* this file contains GATT database building and query functions
*
******************************************************************************/
#include "bt_target.h"
#if BLE_INCLUDED == TRUE
#include "bt_trace.h"
//#include "bt_utils.h"
//#include <stdio.h>
#include <string.h>
#include "gatt_int.h"
#include "l2c_api.h"
#include "btm_int.h"
/********************************************************************************
** L O C A L F U N C T I O N P R O T O T Y P E S *
*********************************************************************************/
static BOOLEAN allocate_svc_db_buf(tGATT_SVC_DB *p_db);
static void *allocate_attr_in_db(tGATT_SVC_DB *p_db, tBT_UUID *p_uuid, tGATT_PERM perm);
static BOOLEAN deallocate_attr_in_db(tGATT_SVC_DB *p_db, void *p_attr);
static BOOLEAN copy_extra_byte_in_db(tGATT_SVC_DB *p_db, void **p_dst, UINT16 len);
static BOOLEAN gatts_db_add_service_declaration(tGATT_SVC_DB *p_db, tBT_UUID *p_service, BOOLEAN is_pri);
static tGATT_STATUS gatts_send_app_read_request(tGATT_TCB *p_tcb, UINT8 op_code,
UINT16 handle, UINT16 offset, UINT32 trans_id);
/*******************************************************************************
**
** Function gatts_init_service_db
**
** Description This function initialize a memory space to be a service database.
**
** Parameter p_db: database pointer.
** len: size of the memory space.
**
** Returns Status of te operation.
**
*******************************************************************************/
BOOLEAN gatts_init_service_db (tGATT_SVC_DB *p_db, tBT_UUID *p_service, BOOLEAN is_pri,
UINT16 s_hdl, UINT16 num_handle)
{
GKI_init_q(&p_db->svc_buffer);
if (!allocate_svc_db_buf(p_db))
{
GATT_TRACE_ERROR("gatts_init_service_db failed, no resources");
return FALSE;
}
GATT_TRACE_DEBUG("gatts_init_service_db");
GATT_TRACE_DEBUG("s_hdl = %d num_handle = %d", s_hdl, num_handle );
/* update service database information */
p_db->next_handle = s_hdl;
p_db->end_handle = s_hdl + num_handle;
return gatts_db_add_service_declaration(p_db, p_service, is_pri);
}
/*******************************************************************************
**
** Function gatts_init_service_db
**
** Description This function initialize a memory space to be a service database.
**
** Parameter p_db: database pointer.
** len: size of the memory space.
**
** Returns Status of te operation.
**
*******************************************************************************/
tBT_UUID * gatts_get_service_uuid (tGATT_SVC_DB *p_db)
{
if (!p_db || !p_db->p_attr_list)
{
GATT_TRACE_ERROR("service DB empty");
return NULL;
}
else
{
return &((tGATT_ATTR16 *)p_db->p_attr_list)->p_value->uuid;
}
}
/*******************************************************************************
**
** Function gatts_check_attr_readability
**
** Description check attribute readability
**
** Returns status of operation.
**
*******************************************************************************/
static tGATT_STATUS gatts_check_attr_readability(tGATT_ATTR16 *p_attr,
UINT16 offset,
BOOLEAN read_long,
tGATT_SEC_FLAG sec_flag,
UINT8 key_size)
{
UINT16 min_key_size;
tGATT_PERM perm = p_attr->permission;
UNUSED(offset);
min_key_size = (((perm & GATT_ENCRYPT_KEY_SIZE_MASK) >> 12));
if (min_key_size != 0 )
{
min_key_size +=6;
}
if (!(perm & GATT_READ_ALLOWED))
{
GATT_TRACE_ERROR( "GATT_READ_NOT_PERMIT");
return GATT_READ_NOT_PERMIT;
}
if ((perm & GATT_READ_AUTH_REQUIRED ) && !(sec_flag & GATT_SEC_FLAG_LKEY_UNAUTHED) &&
!(sec_flag & BTM_SEC_FLAG_ENCRYPTED))
{
GATT_TRACE_ERROR( "GATT_INSUF_AUTHENTICATION");
return GATT_INSUF_AUTHENTICATION;
}
if ((perm & GATT_READ_MITM_REQUIRED ) && !(sec_flag & GATT_SEC_FLAG_LKEY_AUTHED))
{
GATT_TRACE_ERROR( "GATT_INSUF_AUTHENTICATION: MITM Required");
return GATT_INSUF_AUTHENTICATION;
}
if ((perm & GATT_READ_ENCRYPTED_REQUIRED ) && !(sec_flag & GATT_SEC_FLAG_ENCRYPTED))
{
GATT_TRACE_ERROR( "GATT_INSUF_ENCRYPTION");
return GATT_INSUF_ENCRYPTION;
}
if ( (perm & GATT_READ_ENCRYPTED_REQUIRED) && (sec_flag & GATT_SEC_FLAG_ENCRYPTED) && (key_size < min_key_size))
{
GATT_TRACE_ERROR( "GATT_INSUF_KEY_SIZE");
return GATT_INSUF_KEY_SIZE;
}
if (read_long)
{
switch (p_attr->uuid)
{
case GATT_UUID_PRI_SERVICE:
case GATT_UUID_SEC_SERVICE:
case GATT_UUID_CHAR_DECLARE:
case GATT_UUID_INCLUDE_SERVICE:
case GATT_UUID_CHAR_EXT_PROP:
case GATT_UUID_CHAR_CLIENT_CONFIG:
case GATT_UUID_CHAR_SRVR_CONFIG:
case GATT_UUID_CHAR_PRESENT_FORMAT:
GATT_TRACE_ERROR("GATT_NOT_LONG");
return GATT_NOT_LONG;
default:
break;
}
}
return GATT_SUCCESS;
}
/*******************************************************************************
**
** Function read_attr_value
**
** Description Utility function to read an attribute value.
**
** Parameter p_attr: pointer to the attribute to read.
** offset: read offset.
** p_value: output parameter to carry out the attribute value.
** p_len: output parameter to carry out the attribute length.
** read_long: this is a read blob request.
** mtu: MTU
** sec_flag: current link security status.
** key_size: encryption key size.
**
** Returns status of operation.
**
*******************************************************************************/
static tGATT_STATUS read_attr_value (void *p_attr,
UINT16 offset,
UINT8 **p_data,
BOOLEAN read_long,
UINT16 mtu,
UINT16 *p_len,
tGATT_SEC_FLAG sec_flag,
UINT8 key_size)
{
UINT16 len = 0, uuid16 = 0;
UINT8 *p = *p_data;
tGATT_STATUS status;
tGATT_ATTR16 *p_attr16 = (tGATT_ATTR16 *)p_attr;
GATT_TRACE_DEBUG("read_attr_value uuid=0x%04x perm=0x%0x sec_flag=0x%x offset=%d read_long=%d",
p_attr16->uuid,
p_attr16->permission,
sec_flag,
offset,
read_long);
status = gatts_check_attr_readability((tGATT_ATTR16 *)p_attr, offset, read_long, sec_flag, key_size);
if (status != GATT_SUCCESS)
return status;
if (p_attr16->uuid_type == GATT_ATTR_UUID_TYPE_16)
uuid16 = p_attr16->uuid;
status = GATT_NO_RESOURCES;
if (uuid16 == GATT_UUID_PRI_SERVICE || uuid16 == GATT_UUID_SEC_SERVICE)
{
len = p_attr16->p_value->uuid.len;
if (mtu >= p_attr16->p_value->uuid.len)
{
gatt_build_uuid_to_stream(&p, p_attr16->p_value->uuid);
status = GATT_SUCCESS;
}
}
else if (uuid16 == GATT_UUID_CHAR_DECLARE)
{
len = (((tGATT_ATTR16 *)(p_attr16->p_next))->uuid_type == GATT_ATTR_UUID_TYPE_16) ? 5 :19;
if (mtu >= len)
{
UINT8_TO_STREAM(p, p_attr16->p_value->char_decl.property);
UINT16_TO_STREAM(p, p_attr16->p_value->char_decl.char_val_handle);
if (((tGATT_ATTR16 *)(p_attr16->p_next))->uuid_type == GATT_ATTR_UUID_TYPE_16)
{
UINT16_TO_STREAM(p, ((tGATT_ATTR16 *)(p_attr16->p_next))->uuid);
}
/* convert a 32bits UUID to 128 bits */
else if (((tGATT_ATTR32 *)(p_attr16->p_next))->uuid_type == GATT_ATTR_UUID_TYPE_32)
{
gatt_convert_uuid32_to_uuid128 (p, ((tGATT_ATTR32 *)(p_attr16->p_next))->uuid);
p += LEN_UUID_128;
}
else
{
ARRAY_TO_STREAM (p, ((tGATT_ATTR128 *)(p_attr16->p_next))->uuid, LEN_UUID_128);
}
status = GATT_SUCCESS;
}
}
else if (uuid16 == GATT_UUID_INCLUDE_SERVICE)
{
if (p_attr16->p_value->incl_handle.service_type.len == LEN_UUID_16)
len = 6;
else
len = 4;
if (mtu >= len)
{
UINT16_TO_STREAM(p, p_attr16->p_value->incl_handle.s_handle);
UINT16_TO_STREAM(p, p_attr16->p_value->incl_handle.e_handle);
if (p_attr16->p_value->incl_handle.service_type.len == LEN_UUID_16)
{
UINT16_TO_STREAM(p, p_attr16->p_value->incl_handle.service_type.uu.uuid16);
}
status = GATT_SUCCESS;
}
}
else /* characteristic description or characteristic value */
{
status = GATT_PENDING;
}
*p_len = len;
*p_data = p;
return status;
}
/*******************************************************************************
**
** Function gatts_db_read_attr_value_by_type
**
** Description Query attribute value by attribute type.
**
** Parameter p_db: pointer to the attribute database.
** p_rsp: Read By type response data.
** s_handle: starting handle of the range we are looking for.
** e_handle: ending handle of the range we are looking for.
** type: Attribute type.
** mtu: MTU.
** sec_flag: current link security status.
** key_size: encryption key size.
**
** Returns Status of the operation.
**
*******************************************************************************/
tGATT_STATUS gatts_db_read_attr_value_by_type (tGATT_TCB *p_tcb,
tGATT_SVC_DB *p_db,
UINT8 op_code,
BT_HDR *p_rsp,
UINT16 s_handle,
UINT16 e_handle,
tBT_UUID type,
UINT16 *p_len,
tGATT_SEC_FLAG sec_flag,
UINT8 key_size,
UINT32 trans_id,
UINT16 *p_cur_handle)
{
tGATT_STATUS status = GATT_NOT_FOUND;
tGATT_ATTR16 *p_attr;
UINT16 len = 0;
UINT8 *p = (UINT8 *)(p_rsp + 1) + p_rsp->len + L2CAP_MIN_OFFSET;
tBT_UUID attr_uuid;
#if (defined(BLE_DELAY_REQUEST_ENC) && (BLE_DELAY_REQUEST_ENC == TRUE))
UINT8 flag;
#endif
if (p_db && p_db->p_attr_list)
{
p_attr = (tGATT_ATTR16 *)p_db->p_attr_list;
while (p_attr && p_attr->handle <= e_handle)
{
if (p_attr->uuid_type == GATT_ATTR_UUID_TYPE_16)
{
attr_uuid.len = LEN_UUID_16;
attr_uuid.uu.uuid16 = p_attr->uuid;
}
else if (p_attr->uuid_type == GATT_ATTR_UUID_TYPE_32)
{
attr_uuid.len = LEN_UUID_32;
attr_uuid.uu.uuid32 = ((tGATT_ATTR32 *)p_attr)->uuid;
}
else
{
attr_uuid.len = LEN_UUID_128;
memcpy(attr_uuid.uu.uuid128, ((tGATT_ATTR128 *)p_attr)->uuid, LEN_UUID_128);
}
if (p_attr->handle >= s_handle && gatt_uuid_compare(type, attr_uuid))
{
if (*p_len <= 2)
{
status = GATT_NO_RESOURCES;
break;
}
UINT16_TO_STREAM (p, p_attr->handle);
status = read_attr_value ((void *)p_attr, 0, &p, FALSE, (UINT16)(*p_len -2), &len, sec_flag, key_size);
if (status == GATT_PENDING)
{
status = gatts_send_app_read_request(p_tcb, op_code, p_attr->handle, 0, trans_id);
/* one callback at a time */
break;
}
else if (status == GATT_SUCCESS)
{
if (p_rsp->offset == 0)
p_rsp->offset = len + 2;
if (p_rsp->offset == len + 2)
{
p_rsp->len += (len + 2);
*p_len -= (len + 2);
}
else
{
GATT_TRACE_ERROR("format mismatch");
status = GATT_NO_RESOURCES;
break;
}
}
else
{
*p_cur_handle = p_attr->handle;
break;
}
}
p_attr = (tGATT_ATTR16 *)p_attr->p_next;
}
}
#if (defined(BLE_DELAY_REQUEST_ENC) && (BLE_DELAY_REQUEST_ENC == TRUE))
if (BTM_GetSecurityFlags(p_tcb->peer_bda, &flag))
{
if ((p_tcb->att_lcid == L2CAP_ATT_CID) && (status == GATT_PENDING) &&
(type.uu.uuid16 == GATT_UUID_GAP_DEVICE_NAME))
{
if ((flag & (BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_FLAG_ENCRYPTED)) ==
BTM_SEC_LINK_KEY_KNOWN)
{
tACL_CONN *p;
p = btm_bda_to_acl(p_tcb->peer_bda, BT_TRANSPORT_LE);
if ((p != NULL) && (p->link_role == BTM_ROLE_MASTER))
{
tBTM_BLE_SEC_ACT sec_act = BTM_BLE_SEC_ENCRYPT;
btm_ble_set_encryption(p_tcb->peer_bda, &sec_act, p->link_role);
}
}
}
}
#endif
return status;
}
/*******************************************************************************
**
** Function gatts_add_included_service
**
** Description This function adds an included service into a database.
**
** Parameter p_db: database pointer.
** inc_srvc_type: included service type.
**
** Returns Status of the operation.
**
*******************************************************************************/
UINT16 gatts_add_included_service (tGATT_SVC_DB *p_db, UINT16 s_handle, UINT16 e_handle,
tBT_UUID service)
{
tGATT_ATTR16 *p_attr;
tBT_UUID uuid = {LEN_UUID_16, {GATT_UUID_INCLUDE_SERVICE}};
GATT_TRACE_DEBUG("gatts_add_included_service: s_hdl = 0x%04x e_hdl = 0x%04x uuid = 0x%04x",
s_handle, e_handle, service.uu.uuid16);
if (service.len == 0 || s_handle == 0 || e_handle == 0)
{
GATT_TRACE_ERROR("gatts_add_included_service Illegal Params.");
return 0;
}
if ((p_attr = (tGATT_ATTR16 *) allocate_attr_in_db(p_db, &uuid, GATT_PERM_READ)) != NULL)
{
if (copy_extra_byte_in_db(p_db, (void **)&p_attr->p_value, sizeof(tGATT_INCL_SRVC)))
{
p_attr->p_value->incl_handle.s_handle = s_handle;
p_attr->p_value->incl_handle.e_handle = e_handle;
memcpy(&p_attr->p_value->incl_handle.service_type, &service, sizeof(tBT_UUID));
return p_attr->handle;
}
else
{
deallocate_attr_in_db(p_db, p_attr);
}
}
return 0;
}
/*******************************************************************************
**
** Function gatts_add_characteristic
**
** Description This function add a characteristics and its descriptor into
** a servce identified by the service database pointer.
**
** Parameter p_db: database pointer.
** perm: permission (authentication and key size requirements)
** property: property of the characteristic.
** p_char: characteristic value information.
**
** Returns Status of te operation.
**
*******************************************************************************/
UINT16 gatts_add_characteristic (tGATT_SVC_DB *p_db, tGATT_PERM perm,
tGATT_CHAR_PROP property,
tBT_UUID * p_char_uuid)
{
tGATT_ATTR16 *p_char_decl, *p_char_val;
tBT_UUID uuid = {LEN_UUID_16, {GATT_UUID_CHAR_DECLARE}};
GATT_TRACE_DEBUG("gatts_add_characteristic perm=0x%0x property=0x%0x", perm, property);
if ((p_char_decl = (tGATT_ATTR16 *)allocate_attr_in_db(p_db, &uuid, GATT_PERM_READ)) != NULL)
{
if (!copy_extra_byte_in_db(p_db, (void **)&p_char_decl->p_value, sizeof(tGATT_CHAR_DECL)))
{
deallocate_attr_in_db(p_db, p_char_decl);
return 0;
}
p_char_val = (tGATT_ATTR16 *)allocate_attr_in_db(p_db, p_char_uuid, perm);
if (p_char_val == NULL)
{
deallocate_attr_in_db(p_db, p_char_decl);
return 0;
}
p_char_decl->p_value->char_decl.property = property;
p_char_decl->p_value->char_decl.char_val_handle = p_char_val->handle;
p_char_val->p_value = NULL;
return p_char_val->handle;
}
return 0;
}
/*******************************************************************************
**
** Function gatt_convertchar_descr_type
**
** Description This function convert a char descript UUID into descriptor type.
**
** Returns descriptor type.
**
*******************************************************************************/
UINT8 gatt_convertchar_descr_type(tBT_UUID *p_descr_uuid)
{
tBT_UUID std_descr = {LEN_UUID_16, {GATT_UUID_CHAR_EXT_PROP}};
if (gatt_uuid_compare(std_descr, * p_descr_uuid))
return GATT_DESCR_EXT_DSCPTOR;
std_descr.uu.uuid16 ++;
if (gatt_uuid_compare(std_descr, * p_descr_uuid))
return GATT_DESCR_USER_DSCPTOR;
std_descr.uu.uuid16 ++;
if (gatt_uuid_compare(std_descr, * p_descr_uuid))
return GATT_DESCR_CLT_CONFIG;
std_descr.uu.uuid16 ++;
if (gatt_uuid_compare(std_descr, * p_descr_uuid))
return GATT_DESCR_SVR_CONFIG;
std_descr.uu.uuid16 ++;
if (gatt_uuid_compare(std_descr, * p_descr_uuid))
return GATT_DESCR_PRES_FORMAT;
std_descr.uu.uuid16 ++;
if (gatt_uuid_compare(std_descr, * p_descr_uuid))
return GATT_DESCR_AGGR_FORMAT;
std_descr.uu.uuid16 ++;
if (gatt_uuid_compare(std_descr, * p_descr_uuid))
return GATT_DESCR_VALID_RANGE;
return GATT_DESCR_UNKNOWN;
}
/*******************************************************************************
**
** Function gatts_add_char_descr
**
** Description This function add a characteristics descriptor.
**
** Parameter p_db: database pointer.
** perm: characteristic descriptor permission type.
** char_dscp_tpye: the characteristic descriptor masks.
** p_dscp_params: characteristic descriptors values.
**
** Returns Status of the operation.
**
*******************************************************************************/
UINT16 gatts_add_char_descr (tGATT_SVC_DB *p_db, tGATT_PERM perm,
tBT_UUID * p_descr_uuid)
{
tGATT_ATTR16 *p_char_dscptr;
GATT_TRACE_DEBUG("gatts_add_char_descr uuid=0x%04x", p_descr_uuid->uu.uuid16);
/* Add characteristic descriptors */
if ((p_char_dscptr = (tGATT_ATTR16 *)allocate_attr_in_db(p_db,
p_descr_uuid,
perm))
== NULL)
{
GATT_TRACE_DEBUG("gatts_add_char_descr Fail for adding char descriptors.");
return 0;
}
else
{
return p_char_dscptr->handle;
}
}
/*******************************************************************************/
/* Service Attribute Database Query Utility Functions */
/*******************************************************************************/
/*******************************************************************************
**
** Function gatts_read_attr_value_by_handle
**
** Description Query attribute value by attribute handle.
**
** Parameter p_db: pointer to the attribute database.
** handle: Attribute handle to read.
** offset: Read offset.
** p_value: output parameter to carry out the attribute value.
** p_len: output parameter as attribute length read.
** read_long: this is a read blob request.
** mtu: MTU.
** sec_flag: current link security status.
** key_size: encryption key size
**
** Returns Status of operation.
**
*******************************************************************************/
tGATT_STATUS gatts_read_attr_value_by_handle(tGATT_TCB *p_tcb,
tGATT_SVC_DB *p_db,
UINT8 op_code,
UINT16 handle, UINT16 offset,
UINT8 *p_value, UINT16 *p_len,
UINT16 mtu,
tGATT_SEC_FLAG sec_flag,
UINT8 key_size,
UINT32 trans_id)
{
tGATT_STATUS status = GATT_NOT_FOUND;
tGATT_ATTR16 *p_attr;
UINT8 *pp = p_value;
if (p_db && p_db->p_attr_list)
{
p_attr = (tGATT_ATTR16 *)p_db->p_attr_list;
while (p_attr && handle >= p_attr->handle)
{
if (p_attr->handle == handle)
{
status = read_attr_value (p_attr, offset, &pp,
(BOOLEAN)(op_code == GATT_REQ_READ_BLOB),
mtu, p_len, sec_flag, key_size);
if (status == GATT_PENDING)
{
status = gatts_send_app_read_request(p_tcb, op_code, p_attr->handle, offset, trans_id);
}
break;
}
p_attr = (tGATT_ATTR16 *)p_attr->p_next;
}
}
return status;
}
/*******************************************************************************
**
** Function gatts_read_attr_perm_check
**
** Description Check attribute readability.
**
** Parameter p_db: pointer to the attribute database.
** handle: Attribute handle to read.
** offset: Read offset.
** p_value: output parameter to carry out the attribute value.
** p_len: output parameter as attribute length read.
** read_long: this is a read blob request.
** mtu: MTU.
** sec_flag: current link security status.
** key_size: encryption key size
**
** Returns Status of operation.
**
*******************************************************************************/
tGATT_STATUS gatts_read_attr_perm_check(tGATT_SVC_DB *p_db,
BOOLEAN is_long,
UINT16 handle,
tGATT_SEC_FLAG sec_flag,
UINT8 key_size)
{
tGATT_STATUS status = GATT_NOT_FOUND;
tGATT_ATTR16 *p_attr;
if (p_db && p_db->p_attr_list)
{
p_attr = (tGATT_ATTR16 *)p_db->p_attr_list;
while (p_attr && handle >= p_attr->handle)
{
if (p_attr->handle == handle)
{
status = gatts_check_attr_readability (p_attr, 0,
is_long,
sec_flag, key_size);
break;
}
p_attr = (tGATT_ATTR16 *) p_attr->p_next;
}
}
return status;
}
/*******************************************************************************
**
** Function gatts_write_attr_perm_check
**
** Description Write attribute value into database.
**
** Parameter p_db: pointer to the attribute database.
** op_code:op code of this write.
** handle: handle of the attribute to write.
** offset: Write offset if write op code is write blob.
** p_data: Attribute value to write.
** len: attribute data length.
** sec_flag: current link security status.
** key_size: encryption key size
**
** Returns Status of the operation.
**
*******************************************************************************/
tGATT_STATUS gatts_write_attr_perm_check (tGATT_SVC_DB *p_db, UINT8 op_code,
UINT16 handle, UINT16 offset, UINT8 *p_data,
UINT16 len, tGATT_SEC_FLAG sec_flag, UINT8 key_size)
{
tGATT_STATUS status = GATT_NOT_FOUND;
tGATT_ATTR16 *p_attr;
UINT16 max_size = 0;
tGATT_PERM perm;
UINT16 min_key_size;
GATT_TRACE_DEBUG( "gatts_write_attr_perm_check op_code=0x%0x handle=0x%04x offset=%d len=%d sec_flag=0x%0x key_size=%d",
op_code, handle, offset, len, sec_flag, key_size);
if (p_db != NULL)
{
p_attr = (tGATT_ATTR16 *) p_db->p_attr_list;
while (p_attr != NULL)
{
if (p_attr->handle == handle)
{
perm = p_attr->permission;
min_key_size = (((perm & GATT_ENCRYPT_KEY_SIZE_MASK) >> 12));
if (min_key_size != 0 )
{
min_key_size +=6;
}
GATT_TRACE_DEBUG( "gatts_write_attr_perm_check p_attr->permission =0x%04x min_key_size==0x%04x",
p_attr->permission,
min_key_size);
if ((op_code == GATT_CMD_WRITE || op_code == GATT_REQ_WRITE)
&& (perm & GATT_WRITE_SIGNED_PERM))
{
/* use the rules for the mixed security see section 10.2.3*/
/* use security mode 1 level 2 when the following condition follows */
/* LE security mode 2 level 1 and LE security mode 1 level 2 */
if ((perm & GATT_PERM_WRITE_SIGNED) && (perm & GATT_PERM_WRITE_ENCRYPTED))
{
perm = GATT_PERM_WRITE_ENCRYPTED;
}
/* use security mode 1 level 3 when the following condition follows */
/* LE security mode 2 level 2 and security mode 1 and LE */
else if (((perm & GATT_PERM_WRITE_SIGNED_MITM) && (perm & GATT_PERM_WRITE_ENCRYPTED)) ||
/* LE security mode 2 and security mode 1 level 3 */
((perm & GATT_WRITE_SIGNED_PERM) && (perm & GATT_PERM_WRITE_ENC_MITM)))
{
perm = GATT_PERM_WRITE_ENC_MITM;
}
}
if ((op_code == GATT_SIGN_CMD_WRITE) && !(perm & GATT_WRITE_SIGNED_PERM))
{
status = GATT_WRITE_NOT_PERMIT;
GATT_TRACE_DEBUG( "gatts_write_attr_perm_check - sign cmd write not allowed");
}
if ((op_code == GATT_SIGN_CMD_WRITE) && (sec_flag & GATT_SEC_FLAG_ENCRYPTED))
{
status = GATT_INVALID_PDU;
GATT_TRACE_ERROR( "gatts_write_attr_perm_check - Error!! sign cmd write sent on a encypted link");
}
else if (!(perm & GATT_WRITE_ALLOWED))
{
status = GATT_WRITE_NOT_PERMIT;
GATT_TRACE_ERROR( "gatts_write_attr_perm_check - GATT_WRITE_NOT_PERMIT");
}
/* require authentication, but not been authenticated */
else if ((perm & GATT_WRITE_AUTH_REQUIRED ) && !(sec_flag & GATT_SEC_FLAG_LKEY_UNAUTHED))
{
status = GATT_INSUF_AUTHENTICATION;
GATT_TRACE_ERROR( "gatts_write_attr_perm_check - GATT_INSUF_AUTHENTICATION");
}
else if ((perm & GATT_WRITE_MITM_REQUIRED ) && !(sec_flag & GATT_SEC_FLAG_LKEY_AUTHED))
{
status = GATT_INSUF_AUTHENTICATION;
GATT_TRACE_ERROR( "gatts_write_attr_perm_check - GATT_INSUF_AUTHENTICATION: MITM required");
}
else if ((perm & GATT_WRITE_ENCRYPTED_PERM ) && !(sec_flag & GATT_SEC_FLAG_ENCRYPTED))
{
status = GATT_INSUF_ENCRYPTION;
GATT_TRACE_ERROR( "gatts_write_attr_perm_check - GATT_INSUF_ENCRYPTION");
}
else if ((perm & GATT_WRITE_ENCRYPTED_PERM ) && (sec_flag & GATT_SEC_FLAG_ENCRYPTED) && (key_size < min_key_size))
{
status = GATT_INSUF_KEY_SIZE;
GATT_TRACE_ERROR( "gatts_write_attr_perm_check - GATT_INSUF_KEY_SIZE");
}
/* LE security mode 2 attribute */
else if (perm & GATT_WRITE_SIGNED_PERM && op_code != GATT_SIGN_CMD_WRITE && !(sec_flag & GATT_SEC_FLAG_ENCRYPTED)
&& (perm & GATT_WRITE_ALLOWED) == 0)
{
status = GATT_INSUF_AUTHENTICATION;
GATT_TRACE_ERROR( "gatts_write_attr_perm_check - GATT_INSUF_AUTHENTICATION: LE security mode 2 required");
}
else /* writable: must be char value declaration or char descritpors */
{
if(p_attr->uuid_type == GATT_ATTR_UUID_TYPE_16)
{
switch (p_attr->uuid)
{
case GATT_UUID_CHAR_PRESENT_FORMAT:/* should be readable only */
case GATT_UUID_CHAR_EXT_PROP:/* should be readable only */
case GATT_UUID_CHAR_AGG_FORMAT: /* should be readable only */
case GATT_UUID_CHAR_VALID_RANGE:
status = GATT_WRITE_NOT_PERMIT;
break;
case GATT_UUID_CHAR_CLIENT_CONFIG:
/* coverity[MISSING_BREAK] */
/* intnended fall through, ignored */
/* fall through */
case GATT_UUID_CHAR_SRVR_CONFIG:
max_size = 2;
case GATT_UUID_CHAR_DESCRIPTION:
default: /* any other must be character value declaration */
status = GATT_SUCCESS;
break;
}
}
else if (p_attr->uuid_type == GATT_ATTR_UUID_TYPE_128 ||
p_attr->uuid_type == GATT_ATTR_UUID_TYPE_32)
{
status = GATT_SUCCESS;
}
else
{
status = GATT_INVALID_PDU;
}
if (p_data == NULL && len > 0)
{
status = GATT_INVALID_PDU;
}
/* these attribute does not allow write blob */
// btla-specific ++
else if ( (p_attr->uuid_type == GATT_ATTR_UUID_TYPE_16) &&
(p_attr->uuid == GATT_UUID_CHAR_CLIENT_CONFIG ||
p_attr->uuid == GATT_UUID_CHAR_SRVR_CONFIG) )
// btla-specific --
{
if (op_code == GATT_REQ_PREPARE_WRITE && offset != 0) /* does not allow write blob */
{
status = GATT_NOT_LONG;
GATT_TRACE_ERROR( "gatts_write_attr_perm_check - GATT_NOT_LONG");
}
else if (len != max_size) /* data does not match the required format */
{
status = GATT_INVALID_ATTR_LEN;
GATT_TRACE_ERROR( "gatts_write_attr_perm_check - GATT_INVALID_PDU");
}
else
{
status = GATT_SUCCESS;
}
}
}
break;
}
else
p_attr = (tGATT_ATTR16 *)p_attr->p_next;
}
}
return status;
}
/*******************************************************************************
**
** Function allocate_attr_in_db
**
** Description Allocate a memory space for a new attribute, and link this
** attribute into the database attribute list.
**
**
** Parameter p_db : database pointer.
** p_uuid: pointer to attribute UUID
** service : type of attribute to be added.
**
** Returns pointer to the newly allocated attribute.
**
*******************************************************************************/
static void *allocate_attr_in_db(tGATT_SVC_DB *p_db, tBT_UUID *p_uuid, tGATT_PERM perm)
{
tGATT_ATTR16 *p_attr16 = NULL, *p_last;
tGATT_ATTR32 *p_attr32 = NULL;
tGATT_ATTR128 *p_attr128 = NULL;
UINT16 len = sizeof(tGATT_ATTR128);
if (p_uuid == NULL)
{
GATT_TRACE_ERROR("illegal UUID");
return NULL;
}
if (p_uuid->len == LEN_UUID_16)
len = sizeof(tGATT_ATTR16);
else if (p_uuid->len == LEN_UUID_32)
len = sizeof(tGATT_ATTR32);
GATT_TRACE_DEBUG("allocate attr %d bytes ",len);
if (p_db->end_handle <= p_db->next_handle)
{
GATT_TRACE_DEBUG("handle space full. handle_max = %d next_handle = %d",
p_db->end_handle, p_db->next_handle);
return NULL;
}
if (p_db->mem_free < len)
{
if (!allocate_svc_db_buf(p_db))
{
GATT_TRACE_ERROR("allocate_attr_in_db failed, no resources");
return NULL;
}
}
memset(p_db->p_free_mem, 0, len);
p_attr16 = (tGATT_ATTR16 *) p_db->p_free_mem;
if (p_uuid->len == LEN_UUID_16 && p_uuid->uu.uuid16 != GATT_ILLEGAL_UUID)
{
p_attr16->uuid_type = GATT_ATTR_UUID_TYPE_16;
p_attr16->uuid = p_uuid->uu.uuid16;
}
else if (p_uuid->len == LEN_UUID_32)
{
p_attr32 = (tGATT_ATTR32 *) p_db->p_free_mem;
p_attr32->uuid_type = GATT_ATTR_UUID_TYPE_32;
p_attr32->uuid = p_uuid->uu.uuid32;
}
else if (p_uuid->len == LEN_UUID_128)
{
p_attr128 = (tGATT_ATTR128 *) p_db->p_free_mem;
p_attr128->uuid_type = GATT_ATTR_UUID_TYPE_128;
memcpy(p_attr128->uuid, p_uuid->uu.uuid128, LEN_UUID_128);
}
p_db->p_free_mem += len;
p_db->mem_free -= len;
p_attr16->handle = p_db->next_handle++;
p_attr16->permission = perm;
p_attr16->p_next = NULL;
/* link the attribute record into the end of DB */
if (p_db->p_attr_list == NULL)
p_db->p_attr_list = p_attr16;
else
{
p_last = (tGATT_ATTR16 *)p_db->p_attr_list;
while (p_last != NULL && p_last->p_next != NULL)
p_last = (tGATT_ATTR16 *)p_last->p_next;
p_last->p_next = p_attr16;
}
if (p_attr16->uuid_type == GATT_ATTR_UUID_TYPE_16)
{
GATT_TRACE_DEBUG("=====> handle = [0x%04x] uuid16 = [0x%04x] perm=0x%02x ",
p_attr16->handle, p_attr16->uuid, p_attr16->permission);
}
else if (p_attr16->uuid_type == GATT_ATTR_UUID_TYPE_32)
{
GATT_TRACE_DEBUG("=====> handle = [0x%04x] uuid32 = [0x%08x] perm=0x%02x ",
p_attr32->handle, p_attr32->uuid, p_attr32->permission);
}
else
{
GATT_TRACE_DEBUG("=====> handle = [0x%04x] uuid128 = [0x%02x:0x%02x] perm=0x%02x ",
p_attr128->handle, p_attr128->uuid[0],p_attr128->uuid[1],
p_attr128->permission);
}
return(void *)p_attr16;
}
/*******************************************************************************
**
** Function deallocate_attr_in_db
**
** Description Free an attribute within the database.
**
** Parameter p_db: database pointer.
** p_attr: pointer to the attribute record to be freed.
**
** Returns BOOLEAN: success
**
*******************************************************************************/
static BOOLEAN deallocate_attr_in_db(tGATT_SVC_DB *p_db, void *p_attr)
{
tGATT_ATTR16 *p_cur, *p_next;
BOOLEAN found = FALSE;
if (p_db->p_attr_list == NULL)
return found;
p_cur = (tGATT_ATTR16 *) p_db->p_attr_list;
p_next = (tGATT_ATTR16 *) p_cur->p_next;
for (; p_cur != NULL && p_next != NULL;
p_cur = p_next, p_next = (tGATT_ATTR16 *)p_next->p_next)
{
if (p_next == p_attr)
{
p_cur->p_next = p_next->p_next;
found = TRUE;
}
}
if (p_cur == p_attr && p_cur == p_db->p_attr_list)
{
p_db->p_attr_list = p_cur->p_next;
found = TRUE;
}
/* else attr not found */
if ( found)
p_db->next_handle --;
return found;
}
/*******************************************************************************
**
** Function copy_extra_byte_in_db
**
** Description Utility function to allocate extra bytes memory in DB and copy
** the value from a source place.
**
**
** Parameter p_db: database pointer.
** p_dst: destination data pointer.
** p_src: source data pointer.
** len: data length to be copied.
**
** Returns None.
**
*******************************************************************************/
static BOOLEAN copy_extra_byte_in_db(tGATT_SVC_DB *p_db, void **p_dst, UINT16 len)
{
UINT8 *p = (UINT8 *)*p_dst;
if (p_db->mem_free < len)
{
if (!allocate_svc_db_buf(p_db))
{
GATT_TRACE_ERROR("copy_extra_byte_in_db failed, no resources");
return FALSE;
}
}
p = p_db->p_free_mem;
p_db->p_free_mem += len;
p_db->mem_free -= len;
memset((void *)p, 0, len);
*p_dst = (void *)p;
return TRUE;
}
/*******************************************************************************
**
** Function allocate_svc_db_buf
**
** Description Utility function to allocate extra buffer for service database.
**
** Returns TRUE if allocation succeed, otherwise FALSE.
**
*******************************************************************************/
static BOOLEAN allocate_svc_db_buf(tGATT_SVC_DB *p_db)
{
BT_HDR *p_buf;
GATT_TRACE_DEBUG("allocate_svc_db_buf allocating extra buffer");
if ((p_buf = (BT_HDR *)GKI_getpoolbuf(GATT_DB_POOL_ID)) == NULL)
{
GATT_TRACE_ERROR("allocate_svc_db_buf failed, no resources");
return FALSE;
}
memset(p_buf, 0, GKI_get_buf_size(p_buf));
p_db->p_free_mem = (UINT8 *) p_buf;
p_db->mem_free = GKI_get_buf_size(p_buf);
GKI_enqueue(&p_db->svc_buffer, p_buf);
return TRUE;
}
/*******************************************************************************
**
** Function gatts_send_app_read_request
**
** Description Send application read request callback
**
** Returns status of operation.
**
*******************************************************************************/
static tGATT_STATUS gatts_send_app_read_request(tGATT_TCB *p_tcb, UINT8 op_code,
UINT16 handle, UINT16 offset, UINT32 trans_id)
{
tGATTS_DATA sr_data;
UINT8 i_rcb;
tGATT_SR_REG *p_sreg;
UINT16 conn_id;
i_rcb = gatt_sr_find_i_rcb_by_handle(handle);
p_sreg = &gatt_cb.sr_reg[i_rcb];
conn_id = GATT_CREATE_CONN_ID(p_tcb->tcb_idx, p_sreg->gatt_if);
if (trans_id == 0)
{
trans_id = gatt_sr_enqueue_cmd(p_tcb, op_code, handle);
gatt_sr_update_cback_cnt(p_tcb, p_sreg->gatt_if, TRUE, TRUE);
}
if (trans_id != 0 )
{
memset(&sr_data, 0, sizeof(tGATTS_DATA));
sr_data.read_req.handle = handle;
sr_data.read_req.is_long = (BOOLEAN)(op_code == GATT_REQ_READ_BLOB);
sr_data.read_req.offset = offset;
gatt_sr_send_req_callback(conn_id,
trans_id, GATTS_REQ_TYPE_READ, &sr_data);
return(tGATT_STATUS) GATT_PENDING;
}
else
return(tGATT_STATUS) GATT_BUSY; /* max pending command, application error */
}
/*******************************************************************************
**
** Function gatts_db_add_service_declaration
**
** Description Update a service database service declaration record.
**
** Parameter p_db: database pointer.
** service: UUID of the service.
**
** Returns void
**
*******************************************************************************/
static BOOLEAN gatts_db_add_service_declaration(tGATT_SVC_DB *p_db, tBT_UUID *p_service, BOOLEAN is_pri)
{
tGATT_ATTR16 *p_attr;
tBT_UUID uuid = {LEN_UUID_16, {0}};
BOOLEAN rt = FALSE;
GATT_TRACE_DEBUG( "add_service_declaration");
if (is_pri)
uuid.uu.uuid16 = GATT_UUID_PRI_SERVICE;
else
uuid.uu.uuid16 = GATT_UUID_SEC_SERVICE;
/* add service declration record */
if ((p_attr = (tGATT_ATTR16 *)(allocate_attr_in_db(p_db, &uuid, GATT_PERM_READ))) != NULL)
{
if (copy_extra_byte_in_db (p_db, (void **)&p_attr->p_value, sizeof(tBT_UUID)))
{
if (p_service->len == LEN_UUID_16)
{
p_attr->p_value->uuid.len = LEN_UUID_16;
p_attr->p_value->uuid.uu.uuid16 = p_service->uu.uuid16;
}
else if (p_service->len == LEN_UUID_32)
{
p_attr->p_value->uuid.len = LEN_UUID_128;
gatt_convert_uuid32_to_uuid128(p_attr->p_value->uuid.uu.uuid128, p_service->uu.uuid32);
}
else
{
p_attr->p_value->uuid.len = LEN_UUID_128;
memcpy(p_attr->p_value->uuid.uu.uuid128, p_service->uu.uuid128, LEN_UUID_128);
}
rt = TRUE;
}
}
return rt;
}
#endif /* BLE_INCLUDED */
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