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https://github.com/esphome/esphome.git
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91 lines
3.0 KiB
C++
91 lines
3.0 KiB
C++
#include "ble_descriptor.h"
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#include "ble_characteristic.h"
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#include "ble_service.h"
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#include "esphome/core/log.h"
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#include <cstring>
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#ifdef USE_ESP32
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namespace esphome {
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namespace esp32_ble_server {
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static const char *const TAG = "esp32_ble_server.descriptor";
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static RAMAllocator<uint8_t> descriptor_allocator{}; // NOLINT
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BLEDescriptor::BLEDescriptor(ESPBTUUID uuid, uint16_t max_len, bool read, bool write) {
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this->uuid_ = uuid;
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this->value_.attr_len = 0;
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this->value_.attr_max_len = max_len;
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this->value_.attr_value = descriptor_allocator.allocate(max_len);
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if (read) {
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this->permissions_ |= ESP_GATT_PERM_READ;
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}
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if (write) {
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this->permissions_ |= ESP_GATT_PERM_WRITE;
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}
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}
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BLEDescriptor::~BLEDescriptor() { free(this->value_.attr_value); } // NOLINT
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void BLEDescriptor::do_create(BLECharacteristic *characteristic) {
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this->characteristic_ = characteristic;
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esp_attr_control_t control;
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control.auto_rsp = ESP_GATT_AUTO_RSP;
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ESP_LOGV(TAG, "Creating descriptor - %s", this->uuid_.to_string().c_str());
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esp_bt_uuid_t uuid = this->uuid_.get_uuid();
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esp_err_t err = esp_ble_gatts_add_char_descr(this->characteristic_->get_service()->get_handle(), &uuid,
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this->permissions_, &this->value_, &control);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "esp_ble_gatts_add_char_descr failed: %d", err);
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this->state_ = FAILED;
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return;
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}
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this->state_ = CREATING;
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}
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void BLEDescriptor::set_value(std::vector<uint8_t> buffer) {
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size_t length = buffer.size();
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if (length > this->value_.attr_max_len) {
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ESP_LOGE(TAG, "Size %d too large, must be no bigger than %d", length, this->value_.attr_max_len);
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return;
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}
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this->value_.attr_len = length;
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memcpy(this->value_.attr_value, buffer.data(), length);
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}
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void BLEDescriptor::gatts_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if,
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esp_ble_gatts_cb_param_t *param) {
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switch (event) {
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case ESP_GATTS_ADD_CHAR_DESCR_EVT: {
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if (this->characteristic_ != nullptr && this->uuid_ == ESPBTUUID::from_uuid(param->add_char_descr.descr_uuid) &&
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this->characteristic_->get_service()->get_handle() == param->add_char_descr.service_handle &&
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this->characteristic_ == this->characteristic_->get_service()->get_last_created_characteristic()) {
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this->handle_ = param->add_char_descr.attr_handle;
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this->state_ = CREATED;
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}
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break;
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}
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case ESP_GATTS_WRITE_EVT: {
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if (this->handle_ != param->write.handle)
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break;
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this->value_.attr_len = param->write.len;
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memcpy(this->value_.attr_value, param->write.value, param->write.len);
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this->emit_(BLEDescriptorEvt::VectorEvt::ON_WRITE,
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std::vector<uint8_t>(param->write.value, param->write.value + param->write.len),
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param->write.conn_id);
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break;
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}
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default:
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break;
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}
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}
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} // namespace esp32_ble_server
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} // namespace esphome
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#endif
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