circuitpython/shared-module/_bleio/ScanResults.c

137 lines
5.0 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2019 Dan Halbert for Adafruit Industries
* Copyright (c) 2018 Artur Pacholec
* Copyright (c) 2017 Glenn Ruben Bakke
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <string.h>
#include "shared/runtime/interrupt_char.h"
#include "py/objstr.h"
#include "py/runtime.h"
#include "shared-bindings/_bleio/ScanEntry.h"
#include "shared-bindings/_bleio/ScanResults.h"
bleio_scanresults_obj_t *shared_module_bleio_new_scanresults(size_t buffer_size, uint8_t *prefixes, size_t prefixes_len, mp_int_t minimum_rssi) {
bleio_scanresults_obj_t *self = mp_obj_malloc(bleio_scanresults_obj_t, &bleio_scanresults_type);
ringbuf_alloc(&self->buf, buffer_size);
self->prefixes = prefixes;
self->prefix_length = prefixes_len;
self->minimum_rssi = minimum_rssi;
return self;
}
mp_obj_t common_hal_bleio_scanresults_next(bleio_scanresults_obj_t *self) {
while (ringbuf_num_filled(&self->buf) == 0 && !self->done && !mp_hal_is_interrupted()) {
RUN_BACKGROUND_TASKS;
}
if (ringbuf_num_filled(&self->buf) == 0 || mp_hal_is_interrupted()) {
return mp_const_none;
}
// Create a ScanEntry out of the data on the buffer.
uint8_t type = ringbuf_get(&self->buf);
bool connectable = (type & (1 << 0)) != 0;
bool scan_response = (type & (1 << 1)) != 0;
uint64_t ticks_ms;
ringbuf_get_n(&self->buf, (uint8_t *)&ticks_ms, sizeof(ticks_ms));
uint8_t rssi = ringbuf_get(&self->buf);
uint8_t peer_addr[NUM_BLEIO_ADDRESS_BYTES];
ringbuf_get_n(&self->buf, peer_addr, sizeof(peer_addr));
uint8_t addr_type = ringbuf_get(&self->buf);
uint16_t len;
ringbuf_get_n(&self->buf, (uint8_t *)&len, sizeof(len));
mp_obj_str_t *o = MP_OBJ_TO_PTR(mp_obj_new_bytes_of_zeros(len));
ringbuf_get_n(&self->buf, (uint8_t *)o->data, len);
bleio_scanentry_obj_t *entry = mp_obj_malloc(bleio_scanentry_obj_t, &bleio_scanentry_type);
entry->rssi = rssi;
bleio_address_obj_t *address = mp_obj_malloc(bleio_address_obj_t, &bleio_address_type);
common_hal_bleio_address_construct(MP_OBJ_TO_PTR(address), peer_addr, addr_type);
entry->address = address;
entry->data = o;
entry->time_received = ticks_ms;
entry->connectable = connectable;
entry->scan_response = scan_response;
return MP_OBJ_FROM_PTR(entry);
}
void shared_module_bleio_scanresults_append(bleio_scanresults_obj_t *self,
uint64_t ticks_ms,
bool connectable,
bool scan_response,
int8_t rssi,
const uint8_t *peer_addr,
uint8_t addr_type,
const uint8_t *data,
uint16_t len) {
int32_t packet_size = sizeof(uint8_t) + sizeof(ticks_ms) + sizeof(rssi) + NUM_BLEIO_ADDRESS_BYTES +
sizeof(addr_type) + sizeof(len) + len;
int32_t empty_space = self->buf.size - ringbuf_num_filled(&self->buf);
if (packet_size >= empty_space) {
// We can't fit the packet so skip it.
return;
}
// Filter the packet.
if (rssi < self->minimum_rssi) {
return;
}
// If any prefixes are provided, then only include packets that include at least one of them.
if (!bleio_scanentry_data_matches(data, len, self->prefixes, self->prefix_length, true)) {
return;
}
uint8_t type = 0;
if (connectable) {
type |= 1 << 0;
}
if (scan_response) {
type |= 1 << 1;
}
// Add the packet to the buffer.
ringbuf_put(&self->buf, type);
ringbuf_put_n(&self->buf, (uint8_t *)&ticks_ms, sizeof(ticks_ms));
ringbuf_put(&self->buf, rssi);
ringbuf_put_n(&self->buf, peer_addr, NUM_BLEIO_ADDRESS_BYTES);
ringbuf_put(&self->buf, addr_type);
ringbuf_put_n(&self->buf, (uint8_t *)&len, sizeof(len));
ringbuf_put_n(&self->buf, data, len);
}
bool shared_module_bleio_scanresults_get_done(bleio_scanresults_obj_t *self) {
return self->done;
}
void shared_module_bleio_scanresults_set_done(bleio_scanresults_obj_t *self, bool done) {
self->done = done;
self->common_hal_data = NULL;
}