mirror of
https://github.com/google/pebble.git
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109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ble_scan.h"
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#include "ble_ad_parse.h"
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#include "applib/app_logging.h"
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#include "applib/applib_malloc.auto.h"
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#include "process_state/app_state/app_state.h"
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#include "comm/ble/gap_le_scan.h"
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#include "kernel/events.h"
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#include "syscall/syscall.h"
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void ble_scan_handle_event(PebbleEvent *e) {
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BLEAppState *ble_app_state = app_state_get_ble_app_state();
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if (!ble_app_state->scan_handler) {
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return;
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}
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// Use the same buffer size as the kernel itself:
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uint8_t *buffer = (uint8_t *) applib_malloc(GAP_LE_SCAN_REPORTS_BUFFER_SIZE);
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if (!buffer) {
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APP_LOG(LOG_LEVEL_ERROR, "Need %u bytes of heap for ble_scan_start()",
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GAP_LE_SCAN_REPORTS_BUFFER_SIZE);
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return;
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}
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uint16_t size = GAP_LE_SCAN_REPORTS_BUFFER_SIZE;
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sys_ble_consume_scan_results(buffer, &size);
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if (size == 0) {
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goto finally;
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}
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// Walk all the reports in the buffer:
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const uint8_t *cursor = buffer;
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while (cursor < buffer + size) {
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const GAPLERawAdReport *report = (GAPLERawAdReport *)cursor;
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const BTDeviceInternal device = (const BTDeviceInternal) {
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.address = report->address.address,
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.is_classic = false,
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.is_random_address = report->is_random_address,
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};
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// Call the scan handler for each report:
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ble_app_state->scan_handler(device.opaque, report->rssi, &report->payload);
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const size_t report_length = sizeof(GAPLERawAdReport) +
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report->payload.ad_data_length +
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report->payload.scan_resp_data_length;
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cursor += report_length;
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}
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finally:
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applib_free(buffer);
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}
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BTErrno ble_scan_start(BLEScanHandler handler) {
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if (!handler) {
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return (BTErrnoInvalidParameter);
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}
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BLEAppState *ble_app_state = app_state_get_ble_app_state();
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if (ble_app_state->scan_handler) {
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return (BTErrnoInvalidState);
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}
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const bool result = sys_ble_scan_start();
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if (!result) {
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return BTErrnoOther;
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}
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ble_app_state->scan_handler = handler;
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event_service_client_subscribe(&ble_app_state->scan_service_info);
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return BTErrnoOK;
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}
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BTErrno ble_scan_stop(void) {
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BLEAppState *ble_app_state = app_state_get_ble_app_state();
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if (!ble_app_state->scan_handler) {
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return (BTErrnoInvalidState);
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}
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const bool result = sys_ble_scan_stop();
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if (!result) {
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return BTErrnoOther;
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}
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event_service_client_unsubscribe(&ble_app_state->scan_service_info);
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ble_app_state->scan_handler = NULL;
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return BTErrnoOK;
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}
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bool ble_scan_is_scanning(void) {
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return sys_ble_scan_is_scanning();
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}
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