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

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/******************************************************************************
*
* Copyright (C) 2008-2012 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 the GATT server functions
*
******************************************************************************/
#include "common/bt_target.h"
#include "osi/allocator.h"
#if BLE_INCLUDED == TRUE && GATTS_INCLUDED == TRUE
#include <string.h>
#include "gatt_int.h"
#include "stack/l2c_api.h"
#include "l2c_int.h"
#define GATT_MTU_REQ_MIN_LEN 2
/*******************************************************************************
**
** Function gatt_send_packet
**
** Description This function is called to send gatt packets directly
**
** Returns status
**
*******************************************************************************/
tGATT_STATUS gatt_send_packet (tGATT_TCB *p_tcb, UINT8 *p_data, UINT16 len)
{
BT_HDR *p_msg = NULL;
UINT8 *p_m = NULL;
UINT16 buf_len;
tGATT_STATUS status;
if (len > p_tcb->payload_size){
return GATT_ILLEGAL_PARAMETER;
}
buf_len = (UINT16)(sizeof(BT_HDR) + p_tcb->payload_size + L2CAP_MIN_OFFSET);
if ((p_msg = (BT_HDR *)osi_malloc(buf_len)) == NULL) {
return GATT_NO_RESOURCES;
}
memset(p_msg, 0, buf_len);
p_msg->len = len;
p_m = (UINT8 *)(p_msg + 1) + L2CAP_MIN_OFFSET;
memcpy(p_m, p_data, len);
status = attp_send_sr_msg(p_tcb, p_msg);
return status;
}
/*******************************************************************************
**
** Function gatt_sr_enqueue_cmd
**
** Description This function enqueue the request from client which needs a
** application response, and update the transaction ID.
**
** Returns void
**
*******************************************************************************/
UINT32 gatt_sr_enqueue_cmd (tGATT_TCB *p_tcb, UINT8 op_code, UINT16 handle)
{
tGATT_SR_CMD *p_cmd = &p_tcb->sr_cmd;
UINT32 trans_id = 0;
if ( (p_cmd->op_code == 0) ||
(op_code == GATT_HANDLE_VALUE_CONF)) { /* no pending request */
if (op_code == GATT_CMD_WRITE ||
op_code == GATT_SIGN_CMD_WRITE ||
op_code == GATT_REQ_MTU ||
op_code == GATT_HANDLE_VALUE_CONF) {
trans_id = ++p_tcb->trans_id;
} else {
p_cmd->trans_id = ++p_tcb->trans_id;
p_cmd->op_code = op_code;
p_cmd->handle = handle;
p_cmd->status = GATT_NOT_FOUND;
p_tcb->trans_id %= GATT_TRANS_ID_MAX;
trans_id = p_cmd->trans_id;
}
}
return trans_id;
}
/*******************************************************************************
**
** Function gatt_sr_cmd_empty
**
** Description This function check the server command queue is empty or not.
**
** Returns TRUE if empty, FALSE if there is pending command.
**
*******************************************************************************/
BOOLEAN gatt_sr_cmd_empty (tGATT_TCB *p_tcb)
{
return (p_tcb->sr_cmd.op_code == 0);
}
/*******************************************************************************
**
** Function gatt_dequeue_sr_cmd
**
** Description This function dequeue the request from command queue.
**
** Returns void
**
*******************************************************************************/
void gatt_dequeue_sr_cmd (tGATT_TCB *p_tcb)
{
/* Double check in case any buffers are queued */
GATT_TRACE_DEBUG("gatt_dequeue_sr_cmd" );
if (p_tcb->sr_cmd.p_rsp_msg) {
GATT_TRACE_ERROR("%s free msg %p", __func__, p_tcb->sr_cmd.p_rsp_msg);
osi_free(p_tcb->sr_cmd.p_rsp_msg);
p_tcb->sr_cmd.p_rsp_msg = NULL;
}
if (p_tcb->sr_cmd.multi_rsp_q) {
while (!fixed_queue_is_empty(p_tcb->sr_cmd.multi_rsp_q)) {
osi_free(fixed_queue_try_dequeue(p_tcb->sr_cmd.multi_rsp_q));
}
fixed_queue_free(p_tcb->sr_cmd.multi_rsp_q, NULL);
}
memset( &p_tcb->sr_cmd, 0, sizeof(tGATT_SR_CMD));
}
/*******************************************************************************
**
** Function process_read_multi_rsp
**
** Description This function check the read multiple response.
**
** Returns BOOLEAN if all replies have been received
**
*******************************************************************************/
static BOOLEAN process_read_multi_rsp (tGATT_SR_CMD *p_cmd, tGATT_STATUS status,
tGATTS_RSP *p_msg, UINT16 mtu)
{
UINT16 ii, total_len, len;
UINT8 *p;
BOOLEAN is_overflow = FALSE;
GATT_TRACE_DEBUG ("process_read_multi_rsp status=%d mtu=%d", status, mtu);
if (p_cmd->multi_rsp_q == NULL) {
p_cmd->multi_rsp_q = fixed_queue_new(QUEUE_SIZE_MAX);
}
/* Enqueue the response */
BT_HDR *p_buf = (BT_HDR *)osi_malloc(sizeof(tGATTS_RSP));
if (p_buf == NULL) {
p_cmd->status = GATT_INSUF_RESOURCE;
return FALSE;
}
memcpy((void *)p_buf, (const void *)p_msg, sizeof(tGATTS_RSP));
fixed_queue_enqueue(p_cmd->multi_rsp_q, p_buf);
p_cmd->status = status;
if (status == GATT_SUCCESS) {
GATT_TRACE_DEBUG ("Multi read count=%d num_hdls=%d",
fixed_queue_length(p_cmd->multi_rsp_q),
p_cmd->multi_req.num_handles);
/* Wait till we get all the responses */
if (fixed_queue_length(p_cmd->multi_rsp_q) == p_cmd->multi_req.num_handles) {
len = sizeof(BT_HDR) + L2CAP_MIN_OFFSET + mtu;
if ((p_buf = (BT_HDR *)osi_calloc(len)) == NULL) {
p_cmd->status = GATT_INSUF_RESOURCE;
return (TRUE);
}
p_buf->offset = L2CAP_MIN_OFFSET;
p = (UINT8 *)(p_buf + 1) + p_buf->offset;
/* First byte in the response is the opcode */
*p++ = GATT_RSP_READ_MULTI;
p_buf->len = 1;
/* Now walk through the buffers puting the data into the response in order */
list_t *list = NULL;
const list_node_t *node = NULL;
if (! fixed_queue_is_empty(p_cmd->multi_rsp_q)) {
list = fixed_queue_get_list(p_cmd->multi_rsp_q);
}
for (ii = 0; ii < p_cmd->multi_req.num_handles; ii++) {
tGATTS_RSP *p_rsp = NULL;
if (list != NULL) {
if (ii == 0) {
node = list_begin(list);
} else {
node = list_next(node);
}
if (node != list_end(list)) {
p_rsp = (tGATTS_RSP *)list_node(node);
}
}
if (p_rsp != NULL) {
total_len = (p_buf->len + p_rsp->attr_value.len);
if (total_len > mtu) {
/* just send the partial response for the overflow case */
len = p_rsp->attr_value.len - (total_len - mtu);
is_overflow = TRUE;
GATT_TRACE_DEBUG ("multi read overflow available len=%d val_len=%d", len, p_rsp->attr_value.len );
} else {
len = p_rsp->attr_value.len;
}
if (p_rsp->attr_value.handle == p_cmd->multi_req.handles[ii]) {
memcpy (p, p_rsp->attr_value.value, len);
if (!is_overflow) {
p += len;
}
p_buf->len += len;
} else {
p_cmd->status = GATT_NOT_FOUND;
break;
}
if (is_overflow) {
break;
}
} else {
p_cmd->status = GATT_NOT_FOUND;
break;
}
} /* loop through all handles*/
/* Sanity check on the buffer length */
if (p_buf->len == 0) {
GATT_TRACE_ERROR("process_read_multi_rsp - nothing found!!");
p_cmd->status = GATT_NOT_FOUND;
osi_free (p_buf);
GATT_TRACE_DEBUG(" osi_free (p_buf)");
} else if (p_cmd->p_rsp_msg != NULL) {
osi_free (p_buf);
} else {
p_cmd->p_rsp_msg = p_buf;
}
return (TRUE);
}
} else { /* any handle read exception occurs, return error */
return (TRUE);
}
/* If here, still waiting */
return (FALSE);
}
/*******************************************************************************
**
** Function gatt_sr_process_app_rsp
**
** Description This function checks whether the response message from application
** match any pending request or not.
**
** Returns void
**
*******************************************************************************/
tGATT_STATUS gatt_sr_process_app_rsp (tGATT_TCB *p_tcb, tGATT_IF gatt_if,
UINT32 trans_id, UINT8 op_code,
tGATT_STATUS status, tGATTS_RSP *p_msg)
{
tGATT_STATUS ret_code = GATT_SUCCESS;
UNUSED(trans_id);
GATT_TRACE_DEBUG("gatt_sr_process_app_rsp gatt_if=%d\n", gatt_if);
gatt_sr_update_cback_cnt(p_tcb, gatt_if, FALSE, FALSE);
if (op_code == GATT_REQ_READ_MULTI) {
/* If no error and still waiting, just return */
if (!process_read_multi_rsp (&p_tcb->sr_cmd, status, p_msg, p_tcb->payload_size)) {
return (GATT_SUCCESS);
}
} else {
if (op_code == GATT_REQ_PREPARE_WRITE && status == GATT_SUCCESS) {
gatt_sr_update_prep_cnt(p_tcb, gatt_if, TRUE, FALSE);
}
if (op_code == GATT_REQ_EXEC_WRITE && status != GATT_SUCCESS) {
gatt_sr_reset_cback_cnt(p_tcb);
}
p_tcb->sr_cmd.status = status;
if (gatt_sr_is_cback_cnt_zero(p_tcb)
&& status == GATT_SUCCESS) {
if (p_tcb->sr_cmd.p_rsp_msg == NULL) {
p_tcb->sr_cmd.p_rsp_msg = attp_build_sr_msg (p_tcb, (UINT8)(op_code + 1), (tGATT_SR_MSG *)p_msg);
} else {
GATT_TRACE_ERROR("Exception!!! already has respond message\n");
}
}
}
if (gatt_sr_is_cback_cnt_zero(p_tcb)) {
if ( (p_tcb->sr_cmd.status == GATT_SUCCESS) && (p_tcb->sr_cmd.p_rsp_msg) ) {
ret_code = attp_send_sr_msg (p_tcb, p_tcb->sr_cmd.p_rsp_msg);
p_tcb->sr_cmd.p_rsp_msg = NULL;
} else {
if (p_tcb->sr_cmd.status == GATT_SUCCESS){
status = GATT_UNKNOWN_ERROR;
}
ret_code = gatt_send_error_rsp (p_tcb, status, op_code, p_tcb->sr_cmd.handle, FALSE);
}
gatt_dequeue_sr_cmd(p_tcb);
}
GATT_TRACE_DEBUG("gatt_sr_process_app_rsp ret_code=%d\n", ret_code);
return ret_code;
}
/*******************************************************************************
**
** Function gatt_process_exec_write_req
**
** Description This function is called to process the execute write request
** from client.
**
** Returns void
**
*******************************************************************************/
void gatt_process_exec_write_req (tGATT_TCB *p_tcb, UINT8 op_code, UINT16 len, UINT8 *p_data)
{
UINT8 *p = p_data, flag, i = 0;
UINT32 trans_id = 0;
tGATT_IF gatt_if;
UINT16 conn_id;
UINT16 queue_num = 0;
BOOLEAN is_first = TRUE;
BOOLEAN is_prepare_write_valid = FALSE;
BOOLEAN is_need_dequeue_sr_cmd = FALSE;
tGATT_PREPARE_WRITE_RECORD *prepare_record = NULL;
tGATT_PREPARE_WRITE_QUEUE_DATA * queue_data = NULL;
UNUSED(len);
#if GATT_CONFORMANCE_TESTING == TRUE
if (gatt_cb.enable_err_rsp && gatt_cb.req_op_code == op_code) {
GATT_TRACE_DEBUG("Conformance tst: forced err rspv for Execute Write: error status=%d",
gatt_cb.err_status);
gatt_send_error_rsp (p_tcb, gatt_cb.err_status, gatt_cb.req_op_code, gatt_cb.handle, FALSE);
return;
}
#endif
STREAM_TO_UINT8(flag, p);
/* mask the flag */
flag &= GATT_PREP_WRITE_EXEC;
prepare_record = &(p_tcb->prepare_write_record);
queue_num = fixed_queue_length(prepare_record->queue);
//if received prepare_write packets include stack_rsp and app_rsp,
//stack respond to execute_write only when stack_rsp handle has invalid_offset
//or invalid_length error;
//app need to respond to execute_write if it has received app_rsp handle packets
if (((prepare_record->error_code_app == GATT_SUCCESS) &&
(prepare_record->total_num == queue_num))
|| (flag == GATT_PREP_WRITE_CANCEL)){
tGATT_EXEC_WRITE_RSP gatt_exec_write_rsp;
gatt_exec_write_rsp.op_code = GATT_RSP_EXEC_WRITE;
gatt_send_packet(p_tcb, (UINT8 *)(&gatt_exec_write_rsp), sizeof(gatt_exec_write_rsp));
gatt_dequeue_sr_cmd(p_tcb);
if (flag != GATT_PREP_WRITE_CANCEL){
is_prepare_write_valid = TRUE;
}
GATT_TRACE_DEBUG("Send execute_write_rsp\n");
} else if ((prepare_record->error_code_app == GATT_SUCCESS) &&
(prepare_record->total_num > queue_num)){
//No error for stack_rsp's handles and there exist some app_rsp's handles,
//so exec_write_rsp depends to app's response; but stack_rsp's data is valid
//TODO: there exist problem if stack_rsp's data is valid but app_rsp's data is not valid.
is_prepare_write_valid = TRUE;
} else if(prepare_record->total_num < queue_num) {
GATT_TRACE_ERROR("Error in %s, line=%d, prepare write total number (%d) \
should not smaller than prepare queue number (%d)\n", \
__func__, __LINE__,prepare_record->total_num, queue_num);
} else if (prepare_record->error_code_app != GATT_SUCCESS){
GATT_TRACE_DEBUG("Send error code for execute_write, code=0x%x\n", prepare_record->error_code_app);
is_need_dequeue_sr_cmd = (prepare_record->total_num == queue_num) ? TRUE : FALSE;
gatt_send_error_rsp(p_tcb, prepare_record->error_code_app, GATT_REQ_EXEC_WRITE, 0, is_need_dequeue_sr_cmd);
}
//dequeue prepare write data
while(fixed_queue_try_peek_first(prepare_record->queue)) {
queue_data = fixed_queue_dequeue(prepare_record->queue);
if (is_prepare_write_valid){
if((queue_data->p_attr->p_value != NULL) && (queue_data->p_attr->p_value->attr_val.attr_val != NULL)){
if(is_first) {
//clear attr_val.attr_len before handle prepare write data
queue_data->p_attr->p_value->attr_val.attr_len = 0;
is_first = FALSE;
}
memcpy(queue_data->p_attr->p_value->attr_val.attr_val+queue_data->offset, queue_data->value, queue_data->len);
//don't forget to increase the attribute value length in the gatts database.
queue_data->p_attr->p_value->attr_val.attr_len += queue_data->len;
}
}
osi_free(queue_data);
}
fixed_queue_free(prepare_record->queue, NULL);
prepare_record->queue = NULL;
/* according to ble spec, even if there is no prep write queued,
* need to respond execute_write_response
* Note: exec_write_rsp callback should be called after all data has been written*/
if (!gatt_sr_is_prep_cnt_zero(p_tcb)) {
if (prepare_record->total_num > queue_num){
trans_id = gatt_sr_enqueue_cmd(p_tcb, op_code, 0);
gatt_sr_copy_prep_cnt_to_cback_cnt(p_tcb);
}
for (i = 0; i < GATT_MAX_APPS; i++) {
if (p_tcb->prep_cnt[i]) {
gatt_if = (tGATT_IF) (i + 1);
conn_id = GATT_CREATE_CONN_ID(p_tcb->tcb_idx, gatt_if);
gatt_sr_send_req_callback(conn_id,
trans_id,
GATTS_REQ_TYPE_WRITE_EXEC,
(tGATTS_DATA *)&flag);
p_tcb->prep_cnt[i] = 0;
}
}
}
prepare_record->total_num = 0;
prepare_record->error_code_app = GATT_SUCCESS;
}
/*******************************************************************************
**
** Function gatt_process_read_multi_req
**
** Description This function is called to process the read multiple request
** from client.
**
** Returns void
**
*******************************************************************************/
void gatt_process_read_multi_req (tGATT_TCB *p_tcb, UINT8 op_code, UINT16 len, UINT8 *p_data)
{
UINT32 trans_id;
UINT16 handle = 0, ll = len;
UINT8 *p = p_data, i_rcb;
tGATT_STATUS err = GATT_SUCCESS;
UINT8 sec_flag, key_size;
tGATTS_RSP *p_msg;
GATT_TRACE_DEBUG("gatt_process_read_multi_req" );
p_tcb->sr_cmd.multi_req.num_handles = 0;
gatt_sr_get_sec_info(p_tcb->peer_bda,
p_tcb->transport,
&sec_flag,
&key_size);
#if GATT_CONFORMANCE_TESTING == TRUE
if (gatt_cb.enable_err_rsp && gatt_cb.req_op_code == op_code) {
GATT_TRACE_DEBUG("Conformance tst: forced err rspvofr ReadMultiple: error status=%d\n", gatt_cb.err_status);
STREAM_TO_UINT16(handle, p);
gatt_send_error_rsp (p_tcb, gatt_cb.err_status, gatt_cb.req_op_code, handle, FALSE);
return;
}
#endif
while (ll >= 2 && p_tcb->sr_cmd.multi_req.num_handles < GATT_MAX_READ_MULTI_HANDLES) {
STREAM_TO_UINT16(handle, p);
if ((i_rcb = gatt_sr_find_i_rcb_by_handle(handle)) < GATT_MAX_SR_PROFILES) {
p_tcb->sr_cmd.multi_req.handles[p_tcb->sr_cmd.multi_req.num_handles++] = handle;
/* check read permission */
if ((err = gatts_read_attr_perm_check( gatt_cb.sr_reg[i_rcb].p_db,
FALSE,
handle,
sec_flag,
key_size))
!= GATT_SUCCESS) {
GATT_TRACE_DEBUG("read permission denied : 0x%02x", err);
break;
}
} else {
/* invalid handle */
err = GATT_INVALID_HANDLE;
break;
}
ll -= 2;
}
if (ll != 0) {
GATT_TRACE_ERROR("max attribute handle reached in ReadMultiple Request.");
err = GATT_INVALID_HANDLE;
}
if (p_tcb->sr_cmd.multi_req.num_handles == 0) {
err = GATT_INVALID_HANDLE;
}
if (err == GATT_SUCCESS) {
if ((trans_id = gatt_sr_enqueue_cmd (p_tcb, op_code, p_tcb->sr_cmd.multi_req.handles[0])) != 0) {
gatt_sr_reset_cback_cnt(p_tcb); /* read multiple use multi_rsp_q's count*/
for (ll = 0; ll < p_tcb->sr_cmd.multi_req.num_handles; ll ++) {
if ((p_msg = (tGATTS_RSP *)osi_malloc(sizeof(tGATTS_RSP))) != NULL) {
memset(p_msg, 0, sizeof(tGATTS_RSP))
;
handle = p_tcb->sr_cmd.multi_req.handles[ll];
i_rcb = gatt_sr_find_i_rcb_by_handle(handle);
p_msg->attr_value.handle = handle;
err = gatts_read_attr_value_by_handle(p_tcb,
gatt_cb.sr_reg[i_rcb].p_db,
op_code,
handle,
0,
p_msg->attr_value.value,
&p_msg->attr_value.len,
GATT_MAX_ATTR_LEN,
sec_flag,
key_size,
trans_id);
if (err == GATT_SUCCESS || err == GATT_STACK_RSP) {
gatt_sr_process_app_rsp(p_tcb, gatt_cb.sr_reg[i_rcb].gatt_if , trans_id, op_code, GATT_SUCCESS, p_msg);
}
/* either not using or done using the buffer, release it now */
osi_free(p_msg);
} else {
err = GATT_NO_RESOURCES;
gatt_dequeue_sr_cmd(p_tcb);
break;
}
}
} else {
err = GATT_NO_RESOURCES;
}
}
/* in theroy BUSY is not possible(should already been checked), protected check */
if (err != GATT_SUCCESS && err != GATT_STACK_RSP && err != GATT_PENDING && err != GATT_BUSY) {
gatt_send_error_rsp(p_tcb, err, op_code, handle, FALSE);
}
}
/*******************************************************************************
**
** Function gatt_build_primary_service_rsp
**
** Description Primamry service request processed internally. Theretically
** only deal with ReadByTypeVAlue and ReadByGroupType.
**
** Returns void
**
*******************************************************************************/
static tGATT_STATUS gatt_build_primary_service_rsp (BT_HDR *p_msg, tGATT_TCB *p_tcb,
UINT8 op_code, UINT16 s_hdl,
UINT16 e_hdl, UINT8 *p_data, tBT_UUID value)
{
tGATT_STATUS status = GATT_NOT_FOUND;
UINT8 handle_len = 4, *p ;
tGATT_SR_REG *p_rcb;
tGATT_SRV_LIST_INFO *p_list = &gatt_cb.srv_list_info;
tGATT_SRV_LIST_ELEM *p_srv = NULL;
tBT_UUID *p_uuid;
UNUSED(p_data);
p = (UINT8 *)(p_msg + 1) + L2CAP_MIN_OFFSET;
p_srv = p_list->p_first;
while (p_srv) {
p_rcb = GATT_GET_SR_REG_PTR(p_srv->i_sreg);
if (p_rcb->in_use &&
p_rcb->s_hdl >= s_hdl &&
p_rcb->s_hdl <= e_hdl &&
p_rcb->type == GATT_UUID_PRI_SERVICE) {
if ((p_uuid = gatts_get_service_uuid (p_rcb->p_db)) != NULL) {
if (op_code == GATT_REQ_READ_BY_GRP_TYPE) {
handle_len = 4 + p_uuid->len;
}
/* get the length byte in the repsonse */
if (p_msg->offset == 0) {
*p ++ = op_code + 1;
p_msg->len ++;
p_msg->offset = handle_len;
if (op_code == GATT_REQ_READ_BY_GRP_TYPE) {
*p ++ = (UINT8)p_msg->offset; /* length byte */
p_msg->len ++;
}
}
if (p_msg->len + p_msg->offset <= p_tcb->payload_size &&
handle_len == p_msg->offset) {
if (op_code != GATT_REQ_FIND_TYPE_VALUE ||
gatt_uuid_compare(value, *p_uuid)) {
UINT16_TO_STREAM(p, p_rcb->s_hdl);
if (p_list->p_last_primary == p_srv &&
p_list->p_last_primary == p_list->p_last) {
GATT_TRACE_DEBUG("Use 0xFFFF for the last primary attribute");
UINT16_TO_STREAM(p, 0xFFFF); /* see GATT ERRATA 4065, 4063, ATT ERRATA 4062 */
} else {
UINT16_TO_STREAM(p, p_rcb->e_hdl);
}
if (op_code == GATT_REQ_READ_BY_GRP_TYPE) {
gatt_build_uuid_to_stream(&p, *p_uuid);
}
status = GATT_SUCCESS;
p_msg->len += p_msg->offset;
}
} else {
break;
}
}
}
p_srv = p_srv->p_next;
}
p_msg->offset = L2CAP_MIN_OFFSET;
return status;
}
/*******************************************************************************
**
** Function gatt_build_find_info_rsp
**
** Description fill the find information response information in the given
** buffer.
**
** Returns TRUE: if data filled successfully.
** FALSE: packet full, or format mismatch.
**
*******************************************************************************/
static tGATT_STATUS gatt_build_find_info_rsp(tGATT_SR_REG *p_rcb, BT_HDR *p_msg, UINT16 *p_len,
UINT16 s_hdl, UINT16 e_hdl)
{
tGATT_STATUS status = GATT_NOT_FOUND;
UINT8 *p;
UINT16 len = *p_len;
tGATT_ATTR16 *p_attr = NULL;
UINT8 info_pair_len[2] = {4, 18};
if (!p_rcb->p_db || !p_rcb->p_db->p_attr_list) {
return status;
}
/* check the attribute database */
p_attr = (tGATT_ATTR16 *) p_rcb->p_db->p_attr_list;
p = (UINT8 *)(p_msg + 1) + L2CAP_MIN_OFFSET + p_msg->len;
while (p_attr) {
if (p_attr->handle > e_hdl) {
break;
}
if (p_attr->handle >= s_hdl) {
if (p_msg->offset == 0) {
p_msg->offset = (p_attr->uuid_type == GATT_ATTR_UUID_TYPE_16) ? GATT_INFO_TYPE_PAIR_16 : GATT_INFO_TYPE_PAIR_128;
}
if (len >= info_pair_len[p_msg->offset - 1]) {
if (p_msg->offset == GATT_INFO_TYPE_PAIR_16 && p_attr->uuid_type == GATT_ATTR_UUID_TYPE_16) {
UINT16_TO_STREAM(p, p_attr->handle);
UINT16_TO_STREAM(p, p_attr->uuid);
} else if (p_msg->offset == GATT_INFO_TYPE_PAIR_128 && p_attr->uuid_type == GATT_ATTR_UUID_TYPE_128 ) {
UINT16_TO_STREAM(p, p_attr->handle);
ARRAY_TO_STREAM (p, ((tGATT_ATTR128 *) p_attr)->uuid, LEN_UUID_128);
} else if (p_msg->offset == GATT_INFO_TYPE_PAIR_128 && p_attr->uuid_type == GATT_ATTR_UUID_TYPE_32) {
UINT16_TO_STREAM(p, p_attr->handle);
gatt_convert_uuid32_to_uuid128(p, ((tGATT_ATTR32 *) p_attr)->uuid);
p += LEN_UUID_128;
} else {
GATT_TRACE_ERROR("format mismatch");
status = GATT_NO_RESOURCES;
break;
/* format mismatch */
}
p_msg->len += info_pair_len[p_msg->offset - 1];
len -= info_pair_len[p_msg->offset - 1];
status = GATT_SUCCESS;
} else {
status = GATT_NO_RESOURCES;
break;
}
}
p_attr = (tGATT_ATTR16 *)p_attr->p_next;
}
*p_len = len;
return status;
}
/*******************************************************************************
**
** Function gatts_internal_read_by_type_req
**
** Description check to see if the ReadByType request can be handled internally.
**
** Returns void
**
*******************************************************************************/
static tGATT_STATUS gatts_validate_packet_format(UINT8 op_code, UINT16 *p_len,
UINT8 **p_data, tBT_UUID *p_uuid_filter,
UINT16 *p_s_hdl, UINT16 *p_e_hdl)
{
tGATT_STATUS reason = GATT_SUCCESS;
UINT16 uuid_len, s_hdl = 0, e_hdl = 0;
UINT16 len = *p_len;
UINT8 *p = *p_data;
if (len >= 4) {
/* obtain starting handle, and ending handle */
STREAM_TO_UINT16(s_hdl, p);
STREAM_TO_UINT16(e_hdl, p);
len -= 4;
if (s_hdl > e_hdl || !GATT_HANDLE_IS_VALID(s_hdl) || !GATT_HANDLE_IS_VALID(e_hdl)) {
reason = GATT_INVALID_HANDLE;
}
/* for these PDUs, uuid filter must present */
else if (op_code == GATT_REQ_READ_BY_GRP_TYPE ||
op_code == GATT_REQ_FIND_TYPE_VALUE ||
op_code == GATT_REQ_READ_BY_TYPE) {
if (len >= 2 && p_uuid_filter != NULL) {
uuid_len = (op_code == GATT_REQ_FIND_TYPE_VALUE) ? 2 : len;
/* parse uuid now */
if (gatt_parse_uuid_from_cmd (p_uuid_filter, uuid_len, &p) == FALSE ||
p_uuid_filter->len == 0) {
GATT_TRACE_DEBUG("UUID filter does not exsit");
reason = GATT_INVALID_PDU;
} else {
len -= p_uuid_filter->len;
}
} else {
reason = GATT_INVALID_PDU;
}
}
} else {
reason = GATT_INVALID_PDU;
}
*p_data = p;
*p_len = len;
*p_s_hdl = s_hdl;
*p_e_hdl = e_hdl;
return reason;
}
/*******************************************************************************
**
** Function gatts_process_primary_service_req
**
** Description process ReadByGroupType/ReadByTypeValue request, for discover
** all primary services or discover primary service by UUID request.
**
** Returns void
**
*******************************************************************************/
void gatts_process_primary_service_req(tGATT_TCB *p_tcb, UINT8 op_code, UINT16 len, UINT8 *p_data)
{
UINT8 reason = GATT_INVALID_PDU;
UINT16 s_hdl = 0, e_hdl = 0;
tBT_UUID uuid, value, primary_service = {LEN_UUID_16, {GATT_UUID_PRI_SERVICE}};
BT_HDR *p_msg = NULL;
UINT16 msg_len = (UINT16)(sizeof(BT_HDR) + p_tcb->payload_size + L2CAP_MIN_OFFSET);
memset (&value, 0, sizeof(tBT_UUID));
reason = gatts_validate_packet_format(op_code, &len, &p_data, &uuid, &s_hdl, &e_hdl);
if (reason == GATT_SUCCESS) {
if (gatt_uuid_compare(uuid, primary_service)) {
if (op_code == GATT_REQ_FIND_TYPE_VALUE) {
if (gatt_parse_uuid_from_cmd(&value, len, &p_data) == FALSE) {
reason = GATT_INVALID_PDU;
}
}
if (reason == GATT_SUCCESS) {
if ((p_msg = (BT_HDR *)osi_calloc(msg_len)) == NULL) {
GATT_TRACE_ERROR("gatts_process_primary_service_req failed. no resources.");
reason = GATT_NO_RESOURCES;
} else {
reason = gatt_build_primary_service_rsp (p_msg, p_tcb, op_code, s_hdl, e_hdl, p_data, value);
}
}
} else {
if (op_code == GATT_REQ_READ_BY_GRP_TYPE) {
reason = GATT_UNSUPPORT_GRP_TYPE;
GATT_TRACE_DEBUG("unexpected ReadByGrpType Group: 0x%04x", uuid.uu.uuid16);
} else {
/* we do not support ReadByTypeValue with any non-primamry_service type */
reason = GATT_NOT_FOUND;
GATT_TRACE_DEBUG("unexpected ReadByTypeValue type: 0x%04x", uuid.uu.uuid16);
}
}
}
if (reason != GATT_SUCCESS) {
if (p_msg) {
osi_free(p_msg);
}
gatt_send_error_rsp (p_tcb, reason, op_code, s_hdl, FALSE);
} else {
attp_send_sr_msg(p_tcb, p_msg);
}
}
/*******************************************************************************
**
** Function gatts_process_find_info
**
** Description process find information request, for discover character
** descriptors.
**
** Returns void
**
*******************************************************************************/
static void gatts_process_find_info(tGATT_TCB *p_tcb, UINT8 op_code, UINT16 len, UINT8 *p_data)
{
UINT8 reason = GATT_INVALID_PDU, *p;
UINT16 s_hdl = 0, e_hdl = 0, buf_len;
BT_HDR *p_msg = NULL;
tGATT_SR_REG *p_rcb;
tGATT_SRV_LIST_INFO *p_list = &gatt_cb.srv_list_info;
tGATT_SRV_LIST_ELEM *p_srv = NULL;
reason = gatts_validate_packet_format(op_code, &len, &p_data, NULL, &s_hdl, &e_hdl);
if (reason == GATT_SUCCESS) {
buf_len = (UINT16)(sizeof(BT_HDR) + p_tcb->payload_size + L2CAP_MIN_OFFSET);
if ((p_msg = (BT_HDR *)osi_calloc(buf_len)) == NULL) {
reason = GATT_NO_RESOURCES;
} else {
reason = GATT_NOT_FOUND;
p = (UINT8 *)(p_msg + 1) + L2CAP_MIN_OFFSET;
*p ++ = op_code + 1;
p_msg->len = 2;
buf_len = p_tcb->payload_size - 2;
p_srv = p_list->p_first;
while (p_srv) {
p_rcb = GATT_GET_SR_REG_PTR(p_srv->i_sreg);
if (p_rcb->in_use &&
!(p_rcb->s_hdl > e_hdl ||
p_rcb->e_hdl < s_hdl)) {
reason = gatt_build_find_info_rsp(p_rcb, p_msg, &buf_len, s_hdl, e_hdl);
if (reason == GATT_NO_RESOURCES) {
reason = GATT_SUCCESS;
break;
}
}
p_srv = p_srv->p_next;
}
*p = (UINT8)p_msg->offset;
p_msg->offset = L2CAP_MIN_OFFSET;
}
}
if (reason != GATT_SUCCESS) {
if (p_msg) {
osi_free(p_msg);
}
gatt_send_error_rsp (p_tcb, reason, op_code, s_hdl, FALSE);
} else {
attp_send_sr_msg(p_tcb, p_msg);
}
}
/*******************************************************************************
**
** Function gatts_process_mtu_req
**
** Description This function is called to process excahnge MTU request.
** Only used on LE.
**
** Returns void
**
*******************************************************************************/
static void gatts_process_mtu_req (tGATT_TCB *p_tcb, UINT16 len, UINT8 *p_data)
{
UINT16 mtu = 0;
UINT8 *p = p_data, i;
BT_HDR *p_buf;
UINT16 conn_id;
/* BR/EDR conenction, send error response */
if (p_tcb->att_lcid != L2CAP_ATT_CID) {
gatt_send_error_rsp (p_tcb, GATT_REQ_NOT_SUPPORTED, GATT_REQ_MTU, 0, FALSE);
} else if (len < GATT_MTU_REQ_MIN_LEN) {
GATT_TRACE_ERROR("invalid MTU request PDU received.\n");
gatt_send_error_rsp (p_tcb, GATT_INVALID_PDU, GATT_REQ_MTU, 0, FALSE);
} else {
STREAM_TO_UINT16 (mtu, p);
/* mtu must be greater than default MTU which is 23/48 */
if (mtu < GATT_DEF_BLE_MTU_SIZE) {
p_tcb->payload_size = GATT_DEF_BLE_MTU_SIZE;
} else if (mtu > gatt_default.local_mtu) {
p_tcb->payload_size = gatt_default.local_mtu;
} else {
p_tcb->payload_size = mtu;
}
/* host will set packet data length to 251 automatically if remote device support set packet data length,
so l2cble_set_fixed_channel_tx_data_length() is not necessary.
l2cble_set_fixed_channel_tx_data_length(p_tcb->peer_bda, L2CAP_ATT_CID, p_tcb->payload_size);
*/
if ((p_buf = attp_build_sr_msg(p_tcb, GATT_RSP_MTU, (tGATT_SR_MSG *) &p_tcb->payload_size)) != NULL) {
attp_send_sr_msg (p_tcb, p_buf);
/* Notify all registered application with new MTU size. Us a transaction ID */
/* of 0, as no response is allowed from applcations */
for (i = 0; i < GATT_MAX_APPS; i ++) {
if (gatt_cb.cl_rcb[i].in_use ) {
conn_id = GATT_CREATE_CONN_ID(p_tcb->tcb_idx, gatt_cb.cl_rcb[i].gatt_if);
gatt_sr_send_req_callback(conn_id, 0, GATTS_REQ_TYPE_MTU,
(tGATTS_DATA *)&p_tcb->payload_size);
}
}
}
}
}
/*******************************************************************************
**
** Function gatts_process_read_by_type_req
**
** Description process Read By type request.
** This PDU can be used to perform:
** - read characteristic value
** - read characteristic descriptor value
** - discover characteristic
** - discover characteristic by UUID
** - relationship discovery
**
** Returns void
**
*******************************************************************************/
void gatts_process_read_by_type_req(tGATT_TCB *p_tcb, UINT8 op_code, UINT16 len, UINT8 *p_data)
{
tBT_UUID uuid;
tGATT_SR_REG *p_rcb;
UINT16 msg_len = (UINT16)(sizeof(BT_HDR) + p_tcb->payload_size + L2CAP_MIN_OFFSET),
buf_len,
s_hdl, e_hdl, err_hdl = 0;
BT_HDR *p_msg = NULL;
tGATT_STATUS reason, ret;
UINT8 *p;
UINT8 sec_flag, key_size;
tGATT_SRV_LIST_INFO *p_list = &gatt_cb.srv_list_info;
tGATT_SRV_LIST_ELEM *p_srv = NULL;
reason = gatts_validate_packet_format(op_code, &len, &p_data, &uuid, &s_hdl, &e_hdl);
GATT_TRACE_DEBUG("%s, op_code =%x, len = %x\n", __func__, op_code, len);
#if GATT_CONFORMANCE_TESTING == TRUE
if (gatt_cb.enable_err_rsp && gatt_cb.req_op_code == op_code) {
GATT_TRACE_DEBUG("Conformance tst: forced err rsp for ReadByType: error status=%d\n", gatt_cb.err_status);
gatt_send_error_rsp (p_tcb, gatt_cb.err_status, gatt_cb.req_op_code, s_hdl, FALSE);
return;
}
#endif
if (reason == GATT_SUCCESS) {
if ((p_msg = (BT_HDR *)osi_calloc(msg_len)) == NULL) {
GATT_TRACE_ERROR("gatts_process_find_info failed. no resources.\n");
reason = GATT_NO_RESOURCES;
} else {
p = (UINT8 *)(p_msg + 1) + L2CAP_MIN_OFFSET;
*p ++ = op_code + 1;
/* reserve length byte */
p_msg->len = 2;
buf_len = p_tcb->payload_size - 2;
reason = GATT_NOT_FOUND;
p_srv = p_list->p_first;
while (p_srv) {
p_rcb = GATT_GET_SR_REG_PTR(p_srv->i_sreg);
if (p_rcb->in_use &&
!(p_rcb->s_hdl > e_hdl ||
p_rcb->e_hdl < s_hdl)) {
gatt_sr_get_sec_info(p_tcb->peer_bda,
p_tcb->transport,
&sec_flag,
&key_size);
ret = gatts_db_read_attr_value_by_type(p_tcb,
p_rcb->p_db,
op_code,
p_msg,
s_hdl,
e_hdl,
uuid,
&buf_len,
sec_flag,
key_size,
0,
&err_hdl);
if (ret != GATT_NOT_FOUND) {
reason = ret;
if (ret == GATT_NO_RESOURCES) {
reason = GATT_SUCCESS;
}
}
if (ret != GATT_SUCCESS && ret != GATT_NOT_FOUND) {
s_hdl = err_hdl;
break;
}
}
p_srv = p_srv->p_next;
}
*p = (UINT8)p_msg->offset;
p_msg->offset = L2CAP_MIN_OFFSET;
}
}
if (reason != GATT_SUCCESS && reason != GATT_STACK_RSP) {
if (p_msg) {
osi_free(p_msg);
}
/* in theroy BUSY is not possible(should already been checked), protected check */
if (reason != GATT_PENDING && reason != GATT_BUSY) {
gatt_send_error_rsp (p_tcb, reason, op_code, s_hdl, FALSE);
}
} else {
attp_send_sr_msg(p_tcb, p_msg);
gatt_dequeue_sr_cmd(p_tcb);
}
}
/*******************************************************************************
**
** Function gatts_process_write_req
**
** Description This function is called to process the write request
** from client.
**
** Returns void
**
*******************************************************************************/
void gatts_process_write_req (tGATT_TCB *p_tcb, UINT8 i_rcb, UINT16 handle,
UINT8 op_code, UINT16 len, UINT8 *p_data)
{
tGATTS_DATA sr_data;
UINT32 trans_id;
tGATT_STATUS status;
UINT8 sec_flag, key_size, *p = p_data;
tGATT_SR_REG *p_sreg;
UINT16 conn_id, offset = 0;
memset(&sr_data, 0, sizeof(tGATTS_DATA));
sr_data.write_req.need_rsp = FALSE;
switch (op_code) {
case GATT_SIGN_CMD_WRITE:
if (op_code == GATT_SIGN_CMD_WRITE) {
GATT_TRACE_DEBUG("Write CMD with data signing" );
len -= GATT_AUTH_SIGN_LEN;
}
/* fall through */
case GATT_CMD_WRITE:
case GATT_REQ_WRITE:
sr_data.write_req.handle = handle;
sr_data.write_req.len = len;
if (len != 0 && p != NULL) {
memcpy (sr_data.write_req.value, p, len);
}
break;
}
gatt_sr_get_sec_info(p_tcb->peer_bda,
p_tcb->transport,
&sec_flag,
&key_size);
status = gatts_write_attr_perm_check (gatt_cb.sr_reg[i_rcb].p_db,
op_code,
handle,
sr_data.write_req.offset,
p,
len,
sec_flag,
key_size);
if (status == GATT_SUCCESS) {
if ((trans_id = gatt_sr_enqueue_cmd(p_tcb, op_code, handle)) != 0) {
p_sreg = &gatt_cb.sr_reg[i_rcb];
conn_id = GATT_CREATE_CONN_ID(p_tcb->tcb_idx, p_sreg->gatt_if);
status = gatts_write_attr_value_by_handle(gatt_cb.sr_reg[i_rcb].p_db,
handle, offset, p, len);
if((op_code == GATT_REQ_WRITE) && (status == GATT_APP_RSP)){
sr_data.write_req.need_rsp = TRUE;
status = GATT_PENDING;
}
gatt_sr_send_req_callback(conn_id,
trans_id,
GATTS_REQ_TYPE_WRITE,
&sr_data);
} else {
GATT_TRACE_ERROR("Error in %s, line=%d, max pending command, send error\n", __func__, __LINE__);
status = GATT_BUSY; /* max pending command, application error */
}
}
/* response should be sent only for write_request */
if ((op_code == GATT_REQ_WRITE) && (sr_data.write_req.need_rsp == FALSE)){
if (status == GATT_SUCCESS){
tGATT_WRITE_REQ_RSP gatt_write_req_rsp;
gatt_write_req_rsp.op_code = GATT_RSP_WRITE;
gatt_send_packet(p_tcb, (UINT8 *)(&gatt_write_req_rsp), sizeof(gatt_write_req_rsp));
gatt_dequeue_sr_cmd(p_tcb);
} else if (status != GATT_PENDING){
/* note: in case of GATT_BUSY, will respond this application error to remote device */
gatt_send_error_rsp (p_tcb, status, op_code, handle, TRUE);
}
}
return;
}
/*******************************************************************************
**
** Function gatts_attr_process_preapre_write
**
** Description This function is called to process the prepare write request
** from client.
**
** Returns void
**
*******************************************************************************/
void gatt_attr_process_prepare_write (tGATT_TCB *p_tcb, UINT8 i_rcb, UINT16 handle,
UINT8 op_code, UINT16 len, UINT8 *p_data)
{
tGATT_STATUS status;
tGATT_PREPARE_WRITE_QUEUE_DATA * queue_data = NULL;
tGATT_ATTR16 *p_attr;
tGATT_ATTR16 *p_attr_temp;
tGATTS_DATA sr_data;
UINT32 trans_id = 0;
UINT8 sec_flag, key_size, *p = p_data;
tGATT_SR_REG *p_sreg;
UINT16 conn_id, offset = 0;
tGATT_SVC_DB *p_db;
BOOLEAN is_need_prepare_write_rsp = FALSE;
BOOLEAN is_need_queue_data = FALSE;
tGATT_PREPARE_WRITE_RECORD *prepare_record = NULL;
memset(&sr_data, 0, sizeof(tGATTS_DATA));
if (len < 2) {
GATT_TRACE_ERROR("%s: Prepare write request was invalid - missing offset, sending error response", __func__);
gatt_send_error_rsp(p_tcb, GATT_INVALID_PDU, op_code, handle, FALSE);
return;
}
//get offset from p_data
STREAM_TO_UINT16(offset, p);
len -= 2;
p_sreg = &gatt_cb.sr_reg[i_rcb];
conn_id = GATT_CREATE_CONN_ID(p_tcb->tcb_idx, p_sreg->gatt_if);
//prepare_record = &(prepare_write_record);
prepare_record = &(p_tcb->prepare_write_record);
gatt_sr_get_sec_info(p_tcb->peer_bda,
p_tcb->transport,
&sec_flag,
&key_size);
status = gatts_write_attr_perm_check (gatt_cb.sr_reg[i_rcb].p_db,
op_code,
handle,
sr_data.write_req.offset,
p,
len,
sec_flag,
key_size);
if (status == GATT_SUCCESS){
if ((trans_id = gatt_sr_enqueue_cmd(p_tcb, op_code, handle)) != 0) {
p_db = gatt_cb.sr_reg[i_rcb].p_db;
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 ) {
p_attr_temp = p_attr;
if (p_attr->control.auto_rsp == GATT_RSP_BY_APP) {
status = GATT_APP_RSP;
} else if (p_attr->p_value != NULL &&
offset > p_attr->p_value->attr_val.attr_max_len) {
status = GATT_INVALID_OFFSET;
is_need_prepare_write_rsp = TRUE;
is_need_queue_data = TRUE;
} else if (p_attr->p_value != NULL &&
((offset + len) > p_attr->p_value->attr_val.attr_max_len)){
status = GATT_INVALID_ATTR_LEN;
is_need_prepare_write_rsp = TRUE;
is_need_queue_data = TRUE;
} else if (p_attr->p_value == NULL) {
GATT_TRACE_ERROR("Error in %s, attribute of handle 0x%x not allocate value buffer\n",
__func__, handle);
status = GATT_UNKNOWN_ERROR;
} else {
//valid prepare write request, need to send response and queue the data
//status: GATT_SUCCESS
is_need_prepare_write_rsp = TRUE;
is_need_queue_data = TRUE;
}
}
p_attr = (tGATT_ATTR16 *)p_attr->p_next;
}
}
} else{
status = GATT_UNKNOWN_ERROR;
GATT_TRACE_ERROR("Error in %s, Line %d: GATT BUSY\n", __func__, __LINE__);
}
}
if (is_need_queue_data){
queue_data = (tGATT_PREPARE_WRITE_QUEUE_DATA *)osi_malloc(len + sizeof(tGATT_PREPARE_WRITE_QUEUE_DATA));
if (queue_data == NULL){
status = GATT_PREPARE_Q_FULL;
} else {
queue_data->p_attr = p_attr_temp;
queue_data->len = len;
queue_data->handle = handle;
queue_data->offset = offset;
memcpy(queue_data->value, p, len);
if (prepare_record->queue == NULL) {
prepare_record->queue = fixed_queue_new(QUEUE_SIZE_MAX);
}
fixed_queue_enqueue(prepare_record->queue, queue_data);
}
}
if (is_need_prepare_write_rsp){
//send prepare write response
if (queue_data != NULL){
queue_data->op_code = op_code + 1;
//5: op_code 1 + handle 2 + offset 2
tGATT_STATUS rsp_send_status = gatt_send_packet(p_tcb, &(queue_data->op_code), queue_data->len + 5);
gatt_sr_update_prep_cnt(p_tcb, p_sreg->gatt_if, TRUE, FALSE);
gatt_dequeue_sr_cmd(p_tcb);
if (rsp_send_status != GATT_SUCCESS){
GATT_TRACE_ERROR("Error in %s, line=%d, fail to send prepare_write_rsp, status=0x%x\n",
__func__, __LINE__, rsp_send_status);
}
} else{
GATT_TRACE_ERROR("Error in %s, line=%d, queue_data should not be NULL here, fail to send prepare_write_rsp\n",
__func__, __LINE__);
}
}
if ((status == GATT_APP_RSP) || (is_need_prepare_write_rsp)){
prepare_record->total_num++;
memset(&sr_data, 0, sizeof(sr_data));
sr_data.write_req.is_prep = TRUE;
sr_data.write_req.handle = handle;
sr_data.write_req.offset = offset;
sr_data.write_req.len = len;
sr_data.write_req.need_rsp = (status == GATT_APP_RSP) ? TRUE : FALSE;
memcpy(sr_data.write_req.value, p, len);
gatt_sr_send_req_callback(conn_id, trans_id, GATTS_REQ_TYPE_WRITE, &sr_data);
} else{
gatt_send_error_rsp(p_tcb, status, GATT_REQ_PREPARE_WRITE, handle, TRUE);
}
if ((prepare_record->error_code_app == GATT_SUCCESS)
&& ((status == GATT_INVALID_OFFSET) || (status == GATT_INVALID_ATTR_LEN))){
prepare_record->error_code_app = status;
}
}
/*******************************************************************************
**
** Function gatts_process_read_req
**
** Description This function is called to process the read request
** from client.
**
** Returns void
**
*******************************************************************************/
static void gatts_process_read_req(tGATT_TCB *p_tcb, tGATT_SR_REG *p_rcb, UINT8 op_code,
UINT16 handle, UINT16 len, UINT8 *p_data)
{
UINT16 buf_len = (UINT16)(sizeof(BT_HDR) + p_tcb->payload_size + L2CAP_MIN_OFFSET);
tGATT_STATUS reason;
BT_HDR *p_msg = NULL;
UINT8 sec_flag, key_size, *p;
UINT16 offset = 0, value_len = 0;
UNUSED (len);
if ((p_msg = (BT_HDR *)osi_calloc(buf_len)) == NULL) {
GATT_TRACE_ERROR("gatts_process_find_info failed. no resources.\n");
reason = GATT_NO_RESOURCES;
} else {
if (op_code == GATT_REQ_READ_BLOB) {
STREAM_TO_UINT16(offset, p_data);
}
p = (UINT8 *)(p_msg + 1) + L2CAP_MIN_OFFSET;
*p ++ = op_code + 1;
p_msg->len = 1;
buf_len = p_tcb->payload_size - 1;
gatt_sr_get_sec_info(p_tcb->peer_bda,
p_tcb->transport,
&sec_flag,
&key_size);
reason = gatts_read_attr_value_by_handle(p_tcb,
p_rcb->p_db,
op_code,
handle,
offset,
p,
&value_len,
buf_len,
sec_flag,
key_size,
0);
p_msg->len += value_len;
}
if (reason != GATT_SUCCESS && reason != GATT_PENDING && reason != GATT_STACK_RSP) {
if (p_msg) {
osi_free(p_msg);
}
/* in theroy BUSY is not possible(should already been checked), protected check */
if (reason != GATT_BUSY) {
gatt_send_error_rsp (p_tcb, reason, op_code, handle, FALSE);
gatt_dequeue_sr_cmd(p_tcb);
}
} else if (reason == GATT_SUCCESS || reason == GATT_STACK_RSP) {
attp_send_sr_msg(p_tcb, p_msg);
gatt_dequeue_sr_cmd(p_tcb);
} else {
if (p_msg) {
osi_free(p_msg);
}
}
}
/*******************************************************************************
**
** Function gatts_process_attribute_req
**
** Description This function is called to process the per attribute handle request
** from client.
**
** Returns void
**
*******************************************************************************/
void gatts_process_attribute_req (tGATT_TCB *p_tcb, UINT8 op_code,
UINT16 len, UINT8 *p_data)
{
UINT16 handle = 0;
UINT8 *p = p_data, i;
tGATT_SR_REG *p_rcb = gatt_cb.sr_reg;
tGATT_STATUS status = GATT_INVALID_HANDLE;
tGATT_ATTR16 *p_attr;
if (len < 2) {
GATT_TRACE_ERROR("Illegal PDU length, discard request\n");
status = GATT_INVALID_PDU;
} else {
STREAM_TO_UINT16(handle, p);
len -= 2;
}
#if GATT_CONFORMANCE_TESTING == TRUE
gatt_cb.handle = handle;
if (gatt_cb.enable_err_rsp && gatt_cb.req_op_code == op_code) {
GATT_TRACE_DEBUG("Conformance tst: forced err rsp: error status=%d\n", gatt_cb.err_status);
gatt_send_error_rsp (p_tcb, gatt_cb.err_status, gatt_cb.req_op_code, handle, FALSE);
return;
}
#endif
if (GATT_HANDLE_IS_VALID(handle)) {
for (i = 0; i < GATT_MAX_SR_PROFILES; i ++, p_rcb ++) {
if (p_rcb->in_use && p_rcb->s_hdl <= handle && p_rcb->e_hdl >= handle) {
p_attr = (tGATT_ATTR16 *)p_rcb->p_db->p_attr_list;
while (p_attr) {
if (p_attr->handle == handle) {
switch (op_code) {
case GATT_REQ_READ: /* read char/char descriptor value */
case GATT_REQ_READ_BLOB:
gatts_process_read_req(p_tcb, p_rcb, op_code, handle, len, p);
break;
case GATT_REQ_WRITE: /* write char/char descriptor value */
case GATT_CMD_WRITE:
case GATT_SIGN_CMD_WRITE:
gatts_process_write_req(p_tcb, i, handle, op_code, len, p);
break;
case GATT_REQ_PREPARE_WRITE:
gatt_attr_process_prepare_write (p_tcb, i, handle, op_code, len, p);
default:
break;
}
status = GATT_SUCCESS;
break;
}
p_attr = (tGATT_ATTR16 *)p_attr->p_next;
}
break;
}
}
}
if (status != GATT_SUCCESS && op_code != GATT_CMD_WRITE && op_code != GATT_SIGN_CMD_WRITE) {
gatt_send_error_rsp (p_tcb, status, op_code, handle, FALSE);
}
}
/*******************************************************************************
**
** Function gatts_proc_srv_chg_ind_ack
**
** Description This function process the service changed indicaiton ACK
**
** Returns void
**
*******************************************************************************/
static void gatts_proc_srv_chg_ind_ack(tGATT_TCB *p_tcb )
{
tGATTS_SRV_CHG_REQ req;
tGATTS_SRV_CHG *p_buf = NULL;
GATT_TRACE_DEBUG("gatts_proc_srv_chg_ind_ack");
if ((p_buf = gatt_is_bda_in_the_srv_chg_clt_list(p_tcb->peer_bda)) != NULL) {
GATT_TRACE_DEBUG("NV update set srv chg = FALSE");
p_buf->srv_changed = FALSE;
memcpy(&req.srv_chg, p_buf, sizeof(tGATTS_SRV_CHG));
if (gatt_cb.cb_info.p_srv_chg_callback) {
(*gatt_cb.cb_info.p_srv_chg_callback)(GATTS_SRV_CHG_CMD_UPDATE_CLIENT, &req, NULL);
}
}
}
/*******************************************************************************
**
** Function gatts_chk_pending_ind
**
** Description This function check any pending indication needs to be sent if
** there is a pending indication then sent the indication
**
** Returns void
**
*******************************************************************************/
static void gatts_chk_pending_ind(tGATT_TCB *p_tcb )
{
#if (GATTS_INCLUDED == TRUE)
tGATT_VALUE *p_buf = (tGATT_VALUE *)fixed_queue_try_peek_first(p_tcb->pending_ind_q);
GATT_TRACE_DEBUG("gatts_chk_pending_ind");
if (p_buf ) {
GATTS_HandleValueIndication (p_buf->conn_id,
p_buf->handle,
p_buf->len,
p_buf->value);
osi_free(fixed_queue_try_remove_from_queue(p_tcb->pending_ind_q,
p_buf));
}
#endif ///GATTS_INCLUDED == TRUE
}
/*******************************************************************************
**
** Function gatts_proc_ind_ack
**
** Description This function process the Indication ack
**
** Returns TRUE continue to process the indication ack by the aaplication
** if the ACk is not a Service Changed Indication Ack
**
*******************************************************************************/
static BOOLEAN gatts_proc_ind_ack(tGATT_TCB *p_tcb, UINT16 ack_handle)
{
BOOLEAN continue_processing = TRUE;
GATT_TRACE_DEBUG ("gatts_proc_ind_ack ack handle=%d", ack_handle);
if (ack_handle == gatt_cb.handle_of_h_r) {
gatts_proc_srv_chg_ind_ack(p_tcb);
/* there is no need to inform the application since srv chg is handled internally by GATT */
continue_processing = FALSE;
}
gatts_chk_pending_ind(p_tcb);
return continue_processing;
}
/*******************************************************************************
**
** Function gatts_process_value_conf
**
** Description This function is called to process the handle value confirmation.
**
** Returns void
**
*******************************************************************************/
void gatts_process_value_conf(tGATT_TCB *p_tcb, UINT8 op_code)
{
UINT16 handle = p_tcb->indicate_handle;
UINT32 trans_id;
UINT8 i;
tGATT_SR_REG *p_rcb = gatt_cb.sr_reg;
BOOLEAN continue_processing;
UINT16 conn_id;
btu_stop_timer (&p_tcb->conf_timer_ent);
if (GATT_HANDLE_IS_VALID(handle)) {
p_tcb->indicate_handle = 0;
continue_processing = gatts_proc_ind_ack(p_tcb, handle);
if (continue_processing) {
for (i = 0; i < GATT_MAX_SR_PROFILES; i ++, p_rcb ++) {
if (p_rcb->in_use && p_rcb->s_hdl <= handle && p_rcb->e_hdl >= handle) {
trans_id = gatt_sr_enqueue_cmd(p_tcb, op_code, handle);
conn_id = GATT_CREATE_CONN_ID(p_tcb->tcb_idx, p_rcb->gatt_if);
tGATTS_DATA p_data = {0};
p_data.handle = handle;
gatt_sr_send_req_callback(conn_id,
trans_id, GATTS_REQ_TYPE_CONF, &p_data);
}
}
}
} else {
GATT_TRACE_ERROR("unexpected handle value confirmation");
}
}
/*******************************************************************************
**
** Function gatt_server_handle_client_req
**
** Description This function is called to handle the client requests to
** server.
**
**
** Returns void
**
*******************************************************************************/
void gatt_server_handle_client_req (tGATT_TCB *p_tcb, UINT8 op_code,
UINT16 len, UINT8 *p_data)
{
/* there is pending command, discard this one */
if (!gatt_sr_cmd_empty(p_tcb) && op_code != GATT_HANDLE_VALUE_CONF) {
return;
}
/* the size of the message may not be bigger than the local max PDU size*/
/* The message has to be smaller than the agreed MTU, len does not include op code */
if (len >= p_tcb->payload_size) {
GATT_TRACE_ERROR("server receive invalid PDU size:%d pdu size:%d", len + 1, p_tcb->payload_size );
/* for invalid request expecting response, send it now */
if (op_code != GATT_CMD_WRITE &&
op_code != GATT_SIGN_CMD_WRITE &&
op_code != GATT_HANDLE_VALUE_CONF) {
gatt_send_error_rsp (p_tcb, GATT_INVALID_PDU, op_code, 0, FALSE);
}
/* otherwise, ignore the pkt */
} else {
switch (op_code) {
case GATT_REQ_READ_BY_GRP_TYPE: /* discover primary services */
case GATT_REQ_FIND_TYPE_VALUE: /* discover service by UUID */
gatts_process_primary_service_req (p_tcb, op_code, len, p_data);
break;
case GATT_REQ_FIND_INFO: /* discover char descrptor */
gatts_process_find_info(p_tcb, op_code, len, p_data);
break;
case GATT_REQ_READ_BY_TYPE: /* read characteristic value, char descriptor value */
/* discover characteristic, discover char by UUID */
gatts_process_read_by_type_req(p_tcb, op_code, len, p_data);
break;
case GATT_REQ_READ: /* read char/char descriptor value */
case GATT_REQ_READ_BLOB:
case GATT_REQ_WRITE: /* write char/char descriptor value */
case GATT_CMD_WRITE:
case GATT_SIGN_CMD_WRITE:
case GATT_REQ_PREPARE_WRITE:
gatts_process_attribute_req (p_tcb, op_code, len, p_data);
break;
case GATT_HANDLE_VALUE_CONF:
gatts_process_value_conf (p_tcb, op_code);
break;
case GATT_REQ_MTU:
gatts_process_mtu_req (p_tcb, len, p_data);
break;
case GATT_REQ_EXEC_WRITE:
gatt_process_exec_write_req (p_tcb, op_code, len, p_data);
break;
case GATT_REQ_READ_MULTI:
gatt_process_read_multi_req (p_tcb, op_code, len, p_data);
break;
default:
break;
}
}
}
#endif /* BLE_INCLUDED == TRUE && GATTS_INCLUDED == TRUE */
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