esp-idf/components/ieee802154/driver/esp_ieee802154_ack.c

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2023-03-20 06:25:10 -04:00
/*
* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include "hal/ieee802154_ll.h"
#include "esp_attr.h"
#include "esp_err.h"
#include "esp_ieee802154_ack.h"
#include "esp_ieee802154_dev.h"
#include "esp_ieee802154_frame.h"
#include "esp_ieee802154_pib.h"
#include "esp_ieee802154_types.h"
static ieee802154_pending_table_t ieee802154_pending_table;
#define BIT_SET(mask, pos) ((mask) |= (1UL << (pos)))
#define BIT_CLR(mask, pos) ((mask) &= ~(1UL << (pos)))
#define BIT_IST(mask, pos) ((mask) & (1UL << (pos)))
static IRAM_ATTR bool ieee802154_addr_in_pending_table(const uint8_t *addr, bool is_short)
{
bool ret = false;
if (is_short) {
for (uint8_t index = 0; index < CONFIG_IEEE802154_PENDING_TABLE_SIZE; index++) {
if (BIT_IST(ieee802154_pending_table.short_addr_mask, index) &&
memcmp(addr, ieee802154_pending_table.short_addr[index], IEEE802154_FRAME_SHORT_ADDR_SIZE) == 0) {
ret = true;
break;
}
}
} else {
for (uint8_t index = 0; index < CONFIG_IEEE802154_PENDING_TABLE_SIZE; index++) {
if (BIT_IST(ieee802154_pending_table.ext_addr_mask, index) &&
memcmp(addr, ieee802154_pending_table.ext_addr[index], IEEE802154_FRAME_EXT_ADDR_SIZE) == 0) {
ret = true;
break;
}
}
}
return ret;
}
esp_err_t ieee802154_add_pending_addr(const uint8_t *addr, bool is_short)
{
esp_err_t ret = ESP_FAIL;
int8_t first_empty_index = -1;
if (is_short) {
for (uint8_t index = 0; index < CONFIG_IEEE802154_PENDING_TABLE_SIZE; index++) {
if (!BIT_IST(ieee802154_pending_table.short_addr_mask, index)) {
// record the first empty index
first_empty_index = (first_empty_index == -1 ? index : first_empty_index);
} else if (memcmp(addr, ieee802154_pending_table.short_addr[index], IEEE802154_FRAME_SHORT_ADDR_SIZE) == 0) {
// The address is in the table already.
ret = ESP_OK;
return ret;
}
}
if (first_empty_index != -1) {
memcpy(ieee802154_pending_table.short_addr[first_empty_index], addr, IEEE802154_FRAME_SHORT_ADDR_SIZE);
BIT_SET(ieee802154_pending_table.short_addr_mask, first_empty_index);
ret = ESP_OK;
}
} else {
for (uint8_t index = 0; index < CONFIG_IEEE802154_PENDING_TABLE_SIZE; index++) {
if (!BIT_IST(ieee802154_pending_table.ext_addr_mask, index)) {
first_empty_index = (first_empty_index == -1 ? index : first_empty_index);
} else if (memcmp(addr, ieee802154_pending_table.ext_addr[index], IEEE802154_FRAME_EXT_ADDR_SIZE) == 0) {
// The address is already in the pending table.
ret = ESP_OK;
return ret;
}
}
if (first_empty_index != -1) {
memcpy(ieee802154_pending_table.ext_addr[first_empty_index], addr, IEEE802154_FRAME_EXT_ADDR_SIZE);
BIT_SET(ieee802154_pending_table.ext_addr_mask, first_empty_index);
ret = ESP_OK;
}
}
return ret;
}
esp_err_t ieee802154_clear_pending_addr(const uint8_t *addr, bool is_short)
{
esp_err_t ret = ESP_FAIL;
// Consider this function may be called in ISR, only clear the mask bits for finishing the process quickly.
if (is_short) {
for (uint8_t index = 0; index < CONFIG_IEEE802154_PENDING_TABLE_SIZE; index++) {
if (BIT_IST(ieee802154_pending_table.short_addr_mask, index) &&
memcmp(addr, ieee802154_pending_table.short_addr[index], IEEE802154_FRAME_SHORT_ADDR_SIZE) == 0) {
BIT_CLR(ieee802154_pending_table.short_addr_mask, index);
ret = ESP_OK;
break;
}
}
} else {
for (uint8_t index = 0; index < CONFIG_IEEE802154_PENDING_TABLE_SIZE; index++) {
if (BIT_IST(ieee802154_pending_table.ext_addr_mask, index) &&
memcmp(addr, ieee802154_pending_table.ext_addr[index], IEEE802154_FRAME_EXT_ADDR_SIZE) == 0) {
BIT_CLR(ieee802154_pending_table.ext_addr_mask, index);
ret = ESP_OK;
break;
}
}
}
return ret;
}
void ieee802154_reset_pending_table(bool is_short)
{
// Consider this function may be called in ISR, only clear the mask bits for finishing the process quickly.
if (is_short) {
ieee802154_pending_table.short_addr_mask = 0;
} else {
ieee802154_pending_table.ext_addr_mask = 0;
}
}
bool ieee802154_ack_config_pending_bit(const uint8_t *frame)
{
bool pending_bit = false;
uint8_t addr[IEEE802154_FRAME_EXT_ADDR_SIZE] = {0};
uint8_t src_mode = 0;
// Only set the HW pending bit for the frames with version 0b00 or 0b01.
bool set_to_hw = (ieee802154_frame_get_version(frame) <= IEEE802154_FRAME_VERSION_1);
ieee802154_ll_pending_mode_t pending_mode = ieee802154_pib_get_pending_mode();
switch (pending_mode) {
case IEEE802154_AUTO_PENDING_DISABLE:
// HW will check whether the frame is data request or not
pending_bit = true;
break;
case IEEE802154_AUTO_PENDING_ENABLE:
case IEEE802154_AUTO_PENDING_ENHANCED:
src_mode = ieee802154_frame_get_src_addr(frame, addr);
if (src_mode == IEEE802154_FRAME_SRC_MODE_SHORT || src_mode == IEEE802154_FRAME_SRC_MODE_EXT) {
if (ieee802154_addr_in_pending_table(addr, src_mode == IEEE802154_FRAME_SRC_MODE_SHORT)) {
pending_bit = true;
}
}
break;
case IEEE802154_AUTO_PENDING_ZIGBEE:
// If the address type is short and in pending table, set 'pending_bit' false, otherwise set true.
src_mode = ieee802154_frame_get_src_addr(frame, addr);
pending_bit = true;
if (src_mode == IEEE802154_FRAME_SRC_MODE_SHORT && ieee802154_addr_in_pending_table(addr, src_mode == IEEE802154_FRAME_SRC_MODE_SHORT)) {
pending_bit = false;
}
break;
default:
assert(false);
}
if (set_to_hw) {
ieee802154_ll_set_pending_bit(pending_bit);
}
return pending_bit;
}