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att_server: add att_server_multiple_notify

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This commit is contained in:
Matthias Ringwald 2023-06-05 16:16:57 +02:00
parent 27afb09486
commit 40f8d8f21f
2 changed files with 72 additions and 0 deletions
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60
src/ble/att_server.c
View File

@ -120,6 +120,7 @@ typedef struct {
uint8_t * receive_buffer;
uint8_t * send_buffer;
} att_server_eatt_bearer_t;
static att_server_eatt_bearer_t * att_server_eatt_bearer_for_con_handle(hci_con_handle_t con_handle);
static btstack_linked_list_t att_server_eatt_bearer_pool;
static btstack_linked_list_t att_server_eatt_bearer_active;
#endif
@ -560,6 +561,7 @@ att_server_send_prepared(const att_server_t *att_server, const att_connection_t
switch (att_server->bearer_type) {
case ATT_BEARER_UNENHANCED_LE:
status = l2cap_send_prepared_connectionless(att_connection->con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, size);
break;
#ifdef ENABLE_GATT_OVER_CLASSIC
case ATT_BEARER_UNENHANCED_CLASSIC:
status = l2cap_send_prepared(att_server->l2cap_cid, size);
@ -1359,6 +1361,52 @@ uint8_t att_server_notify(hci_con_handle_t con_handle, uint16_t attribute_handle
return att_server_send_prepared(att_server, att_connection, NULL, size);
}
/**
* @brief notify client about multiple attribute value changes
* @param con_handle
* @param num_attributes
* @param attribute_handles[]
* @param values_data[]
* @param values_len[]
* @return 0 if ok, error otherwise
*/
uint8_t att_server_multiple_notify(hci_con_handle_t con_handle, uint8_t num_attributes,
const uint16_t * attribute_handles, const uint8_t ** values_data, const uint16_t * values_len){
att_server_t * att_server = NULL;
att_connection_t * att_connection = NULL;
uint8_t * packet_buffer = NULL;
// prfer enhanced bearer
#ifdef ENABLE_GATT_OVER_EATT
att_server_eatt_bearer_t * eatt_bearer = att_server_eatt_bearer_for_con_handle(con_handle);
if (eatt_bearer != NULL){
att_server = &eatt_bearer->att_server;
att_connection = &eatt_bearer->att_connection;
packet_buffer = eatt_bearer->send_buffer;
} else
#endif
{
hci_connection_t *hci_connection = hci_connection_for_handle(con_handle);
if (hci_connection != NULL) {
att_server = &hci_connection->att_server;
att_connection = &hci_connection->att_connection;
}
}
if (att_server == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
if (!att_server_can_send_packet(att_server, att_connection)) return BTSTACK_ACL_BUFFERS_FULL;
if (packet_buffer == NULL){
l2cap_reserve_packet_buffer();
packet_buffer = l2cap_get_outgoing_buffer();
}
uint16_t size = att_prepare_handle_value_multiple_notification(att_connection, num_attributes, attribute_handles, values_data, values_len, packet_buffer);
return att_server_send_prepared(att_server, att_connection, packet_buffer, size);
}
uint8_t att_server_indicate(hci_con_handle_t con_handle, uint16_t attribute_handle, const uint8_t *value, uint16_t value_len){
hci_connection_t * hci_connection = hci_connection_for_handle(con_handle);
if (!hci_connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
@ -1414,6 +1462,18 @@ static att_server_eatt_bearer_t * att_server_eatt_bearer_for_cid(uint16_t cid){
return NULL;
}
static att_server_eatt_bearer_t * att_server_eatt_bearer_for_con_handle(hci_con_handle_t con_handle){
btstack_linked_list_iterator_t it;
btstack_linked_list_iterator_init(&it, &att_server_eatt_bearer_active);
while(btstack_linked_list_iterator_has_next(&it)){
att_server_eatt_bearer_t * eatt_bearer = (att_server_eatt_bearer_t *) btstack_linked_list_iterator_next(&it);
if (eatt_bearer->att_connection.con_handle == con_handle) {
return eatt_bearer;
}
}
return NULL;
}
static void att_server_eatt_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
uint16_t cid;
uint8_t status;

12
src/ble/att_server.h
View File

@ -130,6 +130,18 @@ uint8_t att_server_request_to_send_indication(btstack_context_callback_registrat
*/
uint8_t att_server_notify(hci_con_handle_t con_handle, uint16_t attribute_handle, const uint8_t *value, uint16_t value_len);
/**
* @brief notify client about multiple attribute value changes
* @param con_handle
* @param num_attributes
* @param attribute_handles[]
* @param values_data[]
* @param values_len[]
* @return 0 if ok, error otherwise
*/
uint8_t att_server_multiple_notify(hci_con_handle_t con_handle, uint8_t num_attributes,
const uint16_t * attribute_handles, const uint8_t ** values_data, const uint16_t * values_len);
/**
* @brief indicate value change to client. client is supposed to reply with an indication_response
* @param con_handle