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att_server: reserved send buffer for each eatt bearer

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This commit is contained in:
Matthias Ringwald 2023-05-16 15:45:11 +02:00
parent 2954c397d6
commit 8d3bb68f49
1 changed files with 8 additions and 1 deletions
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9
src/ble/att_server.c
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@ -1340,13 +1340,16 @@ void att_server_deinit(void){
}
#ifdef ENABLE_GATT_OVER_EATT
static uint16_t att_server_eatt_receive_buffer_size;
static uint16_t att_server_eatt_send_buffer_size;
typedef struct {
btstack_linked_item_t item;
uint16_t l2cap_cid;
att_server_t att_server;
att_connection_t att_connection;
uint8_t * receive_buffer;
uint8_t * send_buffer;
} att_server_eatt_bearer_t;
static btstack_linked_list_t att_server_eatt_bearer_pool;
@ -1464,7 +1467,9 @@ uint8_t att_server_eatt_init(uint8_t num_eatt_bearers, uint8_t * storage_buffer,
// TODO: The minimum ATT_MTU for an Enhanced ATT bearer is 64 octets.
memset(storage_buffer, 0, storage_size);
att_server_eatt_receive_buffer_size = ((storage_size - size_for_structs) / num_eatt_bearers);
uint16_t buffer_size_per_bearer = ((storage_size - size_for_structs) / num_eatt_bearers);
att_server_eatt_receive_buffer_size = buffer_size_per_bearer / 2;
att_server_eatt_send_buffer_size = buffer_size_per_bearer / 2;
uint8_t * bearer_buffer = &storage_buffer[size_for_structs];
uint8_t i;
att_server_eatt_bearer_t * eatt_bearer = (att_server_eatt_bearer_t *) storage_buffer;
@ -1474,6 +1479,8 @@ uint8_t att_server_eatt_init(uint8_t num_eatt_bearers, uint8_t * storage_buffer,
eatt_bearer->att_connection.con_handle = HCI_CON_HANDLE_INVALID;
eatt_bearer->receive_buffer = bearer_buffer;
bearer_buffer += att_server_eatt_receive_buffer_size;
eatt_bearer->send_buffer = bearer_buffer;
bearer_buffer += att_server_eatt_send_buffer_size;
btstack_linked_list_add(&att_server_eatt_bearer_pool, (btstack_linked_item_t *) eatt_bearer);
eatt_bearer++;
}