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esp-idf/examples/bluetooth/esp_hid_host/main/esp_hid_gap.c

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/*
* SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Unlicense OR CC0-1.0
*/
#include <string.h>
#include <stdbool.h>
#include <inttypes.h>
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "esp_hid_gap.h"
#if CONFIG_BT_BLUEDROID_ENABLED
#include "esp_bt_device.h"
#endif
#if CONFIG_BT_NIMBLE_ENABLED
#include "host/ble_hs.h"
#include "nimble/nimble_port.h"
#include "host/ble_gap.h"
#include "host/ble_hs_adv.h"
#include "nimble/ble.h"
#include "host/ble_sm.h"
#define BLE_HID_SVC_UUID 0x1812 /* HID Service*/
#else
#include "esp_bt_device.h"
#endif
static const char *TAG = "ESP_HID_GAP";
// uncomment to print all devices that were seen during a scan
#define GAP_DBG_PRINTF(...) printf(__VA_ARGS__)
#if CONFIG_BT_HID_HOST_ENABLED
static const char * gap_bt_prop_type_names[5] = {"","BDNAME","COD","RSSI","EIR"};
#endif
static esp_hid_scan_result_t *bt_scan_results = NULL;
static size_t num_bt_scan_results = 0;
static esp_hid_scan_result_t *ble_scan_results = NULL;
static size_t num_ble_scan_results = 0;
static SemaphoreHandle_t bt_hidh_cb_semaphore = NULL;
#define WAIT_BT_CB() xSemaphoreTake(bt_hidh_cb_semaphore, portMAX_DELAY)
#define SEND_BT_CB() xSemaphoreGive(bt_hidh_cb_semaphore)
static SemaphoreHandle_t ble_hidh_cb_semaphore = NULL;
#define WAIT_BLE_CB() xSemaphoreTake(ble_hidh_cb_semaphore, portMAX_DELAY)
#define SEND_BLE_CB() xSemaphoreGive(ble_hidh_cb_semaphore)
#define SIZEOF_ARRAY(a) (sizeof(a)/sizeof(*a))
#if !CONFIG_BT_NIMBLE_ENABLED
static const char *ble_gap_evt_names[] = { "ADV_DATA_SET_COMPLETE", "SCAN_RSP_DATA_SET_COMPLETE", "SCAN_PARAM_SET_COMPLETE", "SCAN_RESULT", "ADV_DATA_RAW_SET_COMPLETE", "SCAN_RSP_DATA_RAW_SET_COMPLETE", "ADV_START_COMPLETE", "SCAN_START_COMPLETE", "AUTH_CMPL", "KEY", "SEC_REQ", "PASSKEY_NOTIF", "PASSKEY_REQ", "OOB_REQ", "LOCAL_IR", "LOCAL_ER", "NC_REQ", "ADV_STOP_COMPLETE", "SCAN_STOP_COMPLETE", "SET_STATIC_RAND_ADDR", "UPDATE_CONN_PARAMS", "SET_PKT_LENGTH_COMPLETE", "SET_LOCAL_PRIVACY_COMPLETE", "REMOVE_BOND_DEV_COMPLETE", "CLEAR_BOND_DEV_COMPLETE", "GET_BOND_DEV_COMPLETE", "READ_RSSI_COMPLETE", "UPDATE_WHITELIST_COMPLETE"};
static const char *bt_gap_evt_names[] = { "DISC_RES", "DISC_STATE_CHANGED", "RMT_SRVCS", "RMT_SRVC_REC", "AUTH_CMPL", "PIN_REQ", "CFM_REQ", "KEY_NOTIF", "KEY_REQ", "READ_RSSI_DELTA"};
static const char *ble_addr_type_names[] = {"PUBLIC", "RANDOM", "RPA_PUBLIC", "RPA_RANDOM"};
const char *ble_addr_type_str(esp_ble_addr_type_t ble_addr_type)
{
if (ble_addr_type > BLE_ADDR_TYPE_RPA_RANDOM) {
return "UNKNOWN";
}
return ble_addr_type_names[ble_addr_type];
}
const char *ble_gap_evt_str(uint8_t event)
{
if (event >= SIZEOF_ARRAY(ble_gap_evt_names)) {
return "UNKNOWN";
}
return ble_gap_evt_names[event];
}
const char *bt_gap_evt_str(uint8_t event)
{
if (event >= SIZEOF_ARRAY(bt_gap_evt_names)) {
return "UNKNOWN";
}
return bt_gap_evt_names[event];
}
#endif
#if CONFIG_BT_BLE_ENABLED
const char *esp_ble_key_type_str(esp_ble_key_type_t key_type)
{
const char *key_str = NULL;
switch (key_type) {
case ESP_LE_KEY_NONE:
key_str = "ESP_LE_KEY_NONE";
break;
case ESP_LE_KEY_PENC:
key_str = "ESP_LE_KEY_PENC";
break;
case ESP_LE_KEY_PID:
key_str = "ESP_LE_KEY_PID";
break;
case ESP_LE_KEY_PCSRK:
key_str = "ESP_LE_KEY_PCSRK";
break;
case ESP_LE_KEY_PLK:
key_str = "ESP_LE_KEY_PLK";
break;
case ESP_LE_KEY_LLK:
key_str = "ESP_LE_KEY_LLK";
break;
case ESP_LE_KEY_LENC:
key_str = "ESP_LE_KEY_LENC";
break;
case ESP_LE_KEY_LID:
key_str = "ESP_LE_KEY_LID";
break;
case ESP_LE_KEY_LCSRK:
key_str = "ESP_LE_KEY_LCSRK";
break;
default:
key_str = "INVALID BLE KEY TYPE";
break;
}
return key_str;
}
#endif /* CONFIG_BT_BLE_ENABLED */
void esp_hid_scan_results_free(esp_hid_scan_result_t *results)
{
esp_hid_scan_result_t *r = NULL;
while (results) {
r = results;
results = results->next;
if (r->name != NULL) {
free((char *)r->name);
}
free(r);
}
}
#if (CONFIG_BT_HID_HOST_ENABLED || CONFIG_BT_BLE_ENABLED)
static esp_hid_scan_result_t *find_scan_result(esp_bd_addr_t bda, esp_hid_scan_result_t *results)
{
esp_hid_scan_result_t *r = results;
while (r) {
if (memcmp(bda, r->bda, sizeof(esp_bd_addr_t)) == 0) {
return r;
}
r = r->next;
}
return NULL;
}
#endif /* (CONFIG_BT_HID_HOST_ENABLED || CONFIG_BT_BLE_ENABLED) */
#if (CONFIG_BT_NIMBLE_ENABLED)
static esp_hid_scan_result_t *find_scan_result(const uint8_t *bda, esp_hid_scan_result_t *results)
{
esp_hid_scan_result_t *r = results;
while (r) {
if (memcmp(bda, r->bda, sizeof(r->bda)) == 0) {
return r;
}
r = r->next;
}
return NULL;
}
#endif
#if CONFIG_BT_HID_HOST_ENABLED
static void add_bt_scan_result(esp_bd_addr_t bda, esp_bt_cod_t *cod, esp_bt_uuid_t *uuid, uint8_t *name, uint8_t name_len, int rssi)
{
esp_hid_scan_result_t *r = find_scan_result(bda, bt_scan_results);
if (r) {
//Some info may come later
if (r->name == NULL && name && name_len) {
char *name_s = (char *)malloc(name_len + 1);
if (name_s == NULL) {
ESP_LOGE(TAG, "Malloc result name failed!");
return;
}
memcpy(name_s, name, name_len);
name_s[name_len] = 0;
r->name = (const char *)name_s;
}
if (r->bt.uuid.len == 0 && uuid->len) {
memcpy(&r->bt.uuid, uuid, sizeof(esp_bt_uuid_t));
}
if (rssi != 0) {
r->rssi = rssi;
}
return;
}
r = (esp_hid_scan_result_t *)malloc(sizeof(esp_hid_scan_result_t));
if (r == NULL) {
ESP_LOGE(TAG, "Malloc bt_hidh_scan_result_t failed!");
return;
}
r->transport = ESP_HID_TRANSPORT_BT;
memcpy(r->bda, bda, sizeof(esp_bd_addr_t));
memcpy(&r->bt.cod, cod, sizeof(esp_bt_cod_t));
memcpy(&r->bt.uuid, uuid, sizeof(esp_bt_uuid_t));
r->usage = esp_hid_usage_from_cod((uint32_t)cod);
r->rssi = rssi;
r->name = NULL;
if (name_len && name) {
char *name_s = (char *)malloc(name_len + 1);
if (name_s == NULL) {
free(r);
ESP_LOGE(TAG, "Malloc result name failed!");
return;
}
memcpy(name_s, name, name_len);
name_s[name_len] = 0;
r->name = (const char *)name_s;
}
r->next = bt_scan_results;
bt_scan_results = r;
num_bt_scan_results++;
}
#endif
#if CONFIG_BT_BLE_ENABLED
static void add_ble_scan_result(esp_bd_addr_t bda, esp_ble_addr_type_t addr_type, uint16_t appearance, uint8_t *name, uint8_t name_len, int rssi)
{
if (find_scan_result(bda, ble_scan_results)) {
ESP_LOGW(TAG, "Result already exists!");
return;
}
esp_hid_scan_result_t *r = (esp_hid_scan_result_t *)malloc(sizeof(esp_hid_scan_result_t));
if (r == NULL) {
ESP_LOGE(TAG, "Malloc ble_hidh_scan_result_t failed!");
return;
}
r->transport = ESP_HID_TRANSPORT_BLE;
memcpy(r->bda, bda, sizeof(esp_bd_addr_t));
r->ble.appearance = appearance;
r->ble.addr_type = addr_type;
r->usage = esp_hid_usage_from_appearance(appearance);
r->rssi = rssi;
r->name = NULL;
if (name_len && name) {
char *name_s = (char *)malloc(name_len + 1);
if (name_s == NULL) {
free(r);
ESP_LOGE(TAG, "Malloc result name failed!");
return;
}
memcpy(name_s, name, name_len);
name_s[name_len] = 0;
r->name = (const char *)name_s;
}
r->next = ble_scan_results;
ble_scan_results = r;
num_ble_scan_results++;
}
#endif /* CONFIG_BT_BLE_ENABLED */
#if CONFIG_BT_NIMBLE_ENABLED
static void add_ble_scan_result(const uint8_t *bda, uint8_t addr_type, uint16_t appearance, uint8_t *name, uint8_t name_len, int rssi)
{
if (find_scan_result(bda, ble_scan_results)) {
ESP_LOGW(TAG, "Result already exists!");
return;
}
esp_hid_scan_result_t *r = (esp_hid_scan_result_t *)malloc(sizeof(esp_hid_scan_result_t));
if (r == NULL) {
ESP_LOGE(TAG, "Malloc ble_hidh_scan_result_t failed!");
return;
}
r->transport = ESP_HID_TRANSPORT_BLE;
memcpy(r->bda, bda, sizeof(r->bda));
r->ble.appearance = appearance;
r->ble.addr_type = addr_type;
r->usage = esp_hid_usage_from_appearance(appearance);
r->rssi = rssi;
r->name = NULL;
if (name_len && name) {
char *name_s = (char *)malloc(name_len + 1);
if (name_s == NULL) {
free(r);
ESP_LOGE(TAG, "Malloc result name failed!");
return;
}
memcpy(name_s, name, name_len);
name_s[name_len] = 0;
r->name = (const char *)name_s;
}
r->next = ble_scan_results;
ble_scan_results = r;
num_ble_scan_results++;
}
#endif /* CONFIG_BT_BLE_ENABLED */
#if !CONFIG_BT_NIMBLE_ENABLED
void print_uuid(esp_bt_uuid_t *uuid)
{
if (uuid->len == ESP_UUID_LEN_16) {
GAP_DBG_PRINTF("UUID16: 0x%04x", uuid->uuid.uuid16);
} else if (uuid->len == ESP_UUID_LEN_32) {
GAP_DBG_PRINTF("UUID32: 0x%08"PRIx32, uuid->uuid.uuid32);
} else if (uuid->len == ESP_UUID_LEN_128) {
GAP_DBG_PRINTF("UUID128: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x", uuid->uuid.uuid128[0],
uuid->uuid.uuid128[1], uuid->uuid.uuid128[2], uuid->uuid.uuid128[3],
uuid->uuid.uuid128[4], uuid->uuid.uuid128[5], uuid->uuid.uuid128[6],
uuid->uuid.uuid128[7], uuid->uuid.uuid128[8], uuid->uuid.uuid128[9],
uuid->uuid.uuid128[10], uuid->uuid.uuid128[11], uuid->uuid.uuid128[12],
uuid->uuid.uuid128[13], uuid->uuid.uuid128[14], uuid->uuid.uuid128[15]);
}
}
#if CONFIG_BT_HID_HOST_ENABLED
static void handle_bt_device_result(struct disc_res_param *disc_res)
{
GAP_DBG_PRINTF("BT : " ESP_BD_ADDR_STR, ESP_BD_ADDR_HEX(disc_res->bda));
uint32_t codv = 0;
esp_bt_cod_t *cod = (esp_bt_cod_t *)&codv;
int8_t rssi = 0;
uint8_t *name = NULL;
uint8_t name_len = 0;
esp_bt_uuid_t uuid;
uuid.len = ESP_UUID_LEN_16;
uuid.uuid.uuid16 = 0;
for (int i = 0; i < disc_res->num_prop; i++) {
esp_bt_gap_dev_prop_t *prop = &disc_res->prop[i];
if (prop->type != ESP_BT_GAP_DEV_PROP_EIR) {
GAP_DBG_PRINTF(", %s: ", gap_bt_prop_type_names[prop->type]);
}
if (prop->type == ESP_BT_GAP_DEV_PROP_BDNAME) {
name = (uint8_t *)prop->val;
name_len = strlen((const char *)name);
GAP_DBG_PRINTF("%s", (const char *)name);
} else if (prop->type == ESP_BT_GAP_DEV_PROP_RSSI) {
rssi = *((int8_t *)prop->val);
GAP_DBG_PRINTF("%d", rssi);
} else if (prop->type == ESP_BT_GAP_DEV_PROP_COD) {
memcpy(&codv, prop->val, sizeof(uint32_t));
GAP_DBG_PRINTF("major: %s, minor: %d, service: 0x%03x", esp_hid_cod_major_str(cod->major), cod->minor, cod->service);
} else if (prop->type == ESP_BT_GAP_DEV_PROP_EIR) {
uint8_t len = 0;
uint8_t *data = 0;
data = esp_bt_gap_resolve_eir_data((uint8_t *)prop->val, ESP_BT_EIR_TYPE_CMPL_16BITS_UUID, &len);
if (data == NULL) {
data = esp_bt_gap_resolve_eir_data((uint8_t *)prop->val, ESP_BT_EIR_TYPE_INCMPL_16BITS_UUID, &len);
}
if (data && len == ESP_UUID_LEN_16) {
uuid.len = ESP_UUID_LEN_16;
uuid.uuid.uuid16 = data[0] + (data[1] << 8);
GAP_DBG_PRINTF(", "); print_uuid(&uuid);
continue;
}
data = esp_bt_gap_resolve_eir_data((uint8_t *)prop->val, ESP_BT_EIR_TYPE_CMPL_32BITS_UUID, &len);
if (data == NULL) {
data = esp_bt_gap_resolve_eir_data((uint8_t *)prop->val, ESP_BT_EIR_TYPE_INCMPL_32BITS_UUID, &len);
}
if (data && len == ESP_UUID_LEN_32) {
uuid.len = len;
memcpy(&uuid.uuid.uuid32, data, sizeof(uint32_t));
GAP_DBG_PRINTF(", "); print_uuid(&uuid);
continue;
}
data = esp_bt_gap_resolve_eir_data((uint8_t *)prop->val, ESP_BT_EIR_TYPE_CMPL_128BITS_UUID, &len);
if (data == NULL) {
data = esp_bt_gap_resolve_eir_data((uint8_t *)prop->val, ESP_BT_EIR_TYPE_INCMPL_128BITS_UUID, &len);
}
if (data && len == ESP_UUID_LEN_128) {
uuid.len = len;
memcpy(uuid.uuid.uuid128, (uint8_t *)data, len);
GAP_DBG_PRINTF(", "); print_uuid(&uuid);
continue;
}
//try to find a name
if (name == NULL) {
data = esp_bt_gap_resolve_eir_data((uint8_t *)prop->val, ESP_BT_EIR_TYPE_CMPL_LOCAL_NAME, &len);
if (data == NULL) {
data = esp_bt_gap_resolve_eir_data((uint8_t *)prop->val, ESP_BT_EIR_TYPE_SHORT_LOCAL_NAME, &len);
}
if (data && len) {
name = data;
name_len = len;
GAP_DBG_PRINTF(", NAME: ");
for (int x = 0; x < len; x++) {
GAP_DBG_PRINTF("%c", (char)data[x]);
}
}
}
}
}
GAP_DBG_PRINTF("\n");
if (cod->major == ESP_BT_COD_MAJOR_DEV_PERIPHERAL || (find_scan_result(disc_res->bda, bt_scan_results) != NULL)) {
add_bt_scan_result(disc_res->bda, cod, &uuid, name, name_len, rssi);
}
}
#endif
#if CONFIG_BT_BLE_ENABLED
static void handle_ble_device_result(struct ble_scan_result_evt_param *scan_rst)
{
uint16_t uuid = 0;
uint16_t appearance = 0;
char name[64] = {0};
uint8_t uuid_len = 0;
uint8_t *uuid_d = esp_ble_resolve_adv_data(scan_rst->ble_adv, ESP_BLE_AD_TYPE_16SRV_CMPL, &uuid_len);
if (uuid_d != NULL && uuid_len) {
uuid = uuid_d[0] + (uuid_d[1] << 8);
}
uint8_t appearance_len = 0;
uint8_t *appearance_d = esp_ble_resolve_adv_data(scan_rst->ble_adv, ESP_BLE_AD_TYPE_APPEARANCE, &appearance_len);
if (appearance_d != NULL && appearance_len) {
appearance = appearance_d[0] + (appearance_d[1] << 8);
}
uint8_t adv_name_len = 0;
uint8_t *adv_name = esp_ble_resolve_adv_data(scan_rst->ble_adv, ESP_BLE_AD_TYPE_NAME_CMPL, &adv_name_len);
if (adv_name == NULL) {
adv_name = esp_ble_resolve_adv_data(scan_rst->ble_adv, ESP_BLE_AD_TYPE_NAME_SHORT, &adv_name_len);
}
if (adv_name != NULL && adv_name_len) {
memcpy(name, adv_name, adv_name_len);
name[adv_name_len] = 0;
}
GAP_DBG_PRINTF("BLE: " ESP_BD_ADDR_STR ", ", ESP_BD_ADDR_HEX(scan_rst->bda));
GAP_DBG_PRINTF("RSSI: %d, ", scan_rst->rssi);
GAP_DBG_PRINTF("UUID: 0x%04x, ", uuid);
GAP_DBG_PRINTF("APPEARANCE: 0x%04x, ", appearance);
GAP_DBG_PRINTF("ADDR_TYPE: '%s'", ble_addr_type_str(scan_rst->ble_addr_type));
if (adv_name_len) {
GAP_DBG_PRINTF(", NAME: '%s'", name);
}
GAP_DBG_PRINTF("\n");
if (uuid == ESP_GATT_UUID_HID_SVC) {
add_ble_scan_result(scan_rst->bda, scan_rst->ble_addr_type, appearance, adv_name, adv_name_len, scan_rst->rssi);
}
}
#endif /* CONFIG_BT_BLE_ENABLED */
#if CONFIG_BT_HID_HOST_ENABLED
/*
* BT GAP
* */
static void bt_gap_event_handler(esp_bt_gap_cb_event_t event, esp_bt_gap_cb_param_t *param)
{
switch (event) {
case ESP_BT_GAP_DISC_STATE_CHANGED_EVT: {
ESP_LOGV(TAG, "BT GAP DISC_STATE %s", (param->disc_st_chg.state == ESP_BT_GAP_DISCOVERY_STARTED) ? "START" : "STOP");
if (param->disc_st_chg.state == ESP_BT_GAP_DISCOVERY_STOPPED) {
SEND_BT_CB();
}
break;
}
case ESP_BT_GAP_DISC_RES_EVT: {
handle_bt_device_result(&param->disc_res);
break;
}
#if (CONFIG_EXAMPLE_SSP_ENABLED)
case ESP_BT_GAP_KEY_NOTIF_EVT:
ESP_LOGI(TAG, "BT GAP KEY_NOTIF passkey:%"PRIu32, param->key_notif.passkey);
break;
case ESP_BT_GAP_CFM_REQ_EVT: {
ESP_LOGI(TAG, "BT GAP CFM_REQ_EVT Please compare the numeric value: %"PRIu32, param->cfm_req.num_val);
esp_bt_gap_ssp_confirm_reply(param->cfm_req.bda, true);
break;
}
case ESP_BT_GAP_KEY_REQ_EVT:
ESP_LOGI(TAG, "BT GAP KEY_REQ_EVT Please enter passkey!");
break;
#endif
case ESP_BT_GAP_MODE_CHG_EVT:
ESP_LOGI(TAG, "BT GAP MODE_CHG_EVT mode:%d", param->mode_chg.mode);
break;
case ESP_BT_GAP_PIN_REQ_EVT: {
ESP_LOGI(TAG, "BT GAP PIN_REQ_EVT min_16_digit:%d", param->pin_req.min_16_digit);
if (param->pin_req.min_16_digit) {
ESP_LOGI(TAG, "Input pin code: 0000 0000 0000 0000");
esp_bt_pin_code_t pin_code = {0};
esp_bt_gap_pin_reply(param->pin_req.bda, true, 16, pin_code);
} else {
ESP_LOGI(TAG, "Input pin code: 1234");
esp_bt_pin_code_t pin_code;
pin_code[0] = '1';
pin_code[1] = '2';
pin_code[2] = '3';
pin_code[3] = '4';
esp_bt_gap_pin_reply(param->pin_req.bda, true, 4, pin_code);
}
break;
}
default:
ESP_LOGW(TAG, "BT GAP EVENT %s", bt_gap_evt_str(event));
break;
}
}
static esp_err_t init_bt_gap(void)
{
esp_err_t ret;
#if (CONFIG_EXAMPLE_SSP_ENABLED)
/* Set default parameters for Secure Simple Pairing */
esp_bt_sp_param_t param_type = ESP_BT_SP_IOCAP_MODE;
esp_bt_io_cap_t iocap = ESP_BT_IO_CAP_IO;
esp_bt_gap_set_security_param(param_type, &iocap, sizeof(uint8_t));
#endif
/*
* Set default parameters for Legacy Pairing
* Use variable pin, input pin code when pairing
*/
esp_bt_pin_type_t pin_type = ESP_BT_PIN_TYPE_VARIABLE;
esp_bt_pin_code_t pin_code;
esp_bt_gap_set_pin(pin_type, 0, pin_code);
if ((ret = esp_bt_gap_register_callback(bt_gap_event_handler)) != ESP_OK) {
ESP_LOGE(TAG, "esp_bt_gap_register_callback failed: %d", ret);
return ret;
}
// Allow BT devices to connect back to us
if ((ret = esp_bt_gap_set_scan_mode(ESP_BT_CONNECTABLE, ESP_BT_NON_DISCOVERABLE)) != ESP_OK) {
ESP_LOGE(TAG, "esp_bt_gap_set_scan_mode failed: %d", ret);
return ret;
}
return ret;
}
static esp_err_t start_bt_scan(uint32_t seconds)
{
esp_err_t ret = ESP_OK;
if ((ret = esp_bt_gap_start_discovery(ESP_BT_INQ_MODE_GENERAL_INQUIRY, (int)(seconds / 1.28), 0)) != ESP_OK) {
ESP_LOGE(TAG, "esp_bt_gap_start_discovery failed: %d", ret);
return ret;
}
return ret;
}
#endif
#if CONFIG_BT_BLE_ENABLED
/*
* BLE GAP
* */
static void ble_gap_event_handler(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_param_t *param)
{
switch (event) {
/*
* SCAN
* */
case ESP_GAP_BLE_SCAN_PARAM_SET_COMPLETE_EVT: {
ESP_LOGV(TAG, "BLE GAP EVENT SCAN_PARAM_SET_COMPLETE");
SEND_BLE_CB();
break;
}
case ESP_GAP_BLE_SCAN_RESULT_EVT: {
esp_ble_gap_cb_param_t *scan_result = (esp_ble_gap_cb_param_t *)param;
switch (scan_result->scan_rst.search_evt) {
case ESP_GAP_SEARCH_INQ_RES_EVT: {
handle_ble_device_result(&scan_result->scan_rst);
break;
}
case ESP_GAP_SEARCH_INQ_CMPL_EVT:
ESP_LOGV(TAG, "BLE GAP EVENT SCAN DONE: %d", scan_result->scan_rst.num_resps);
SEND_BLE_CB();
break;
default:
break;
}
break;
}
case ESP_GAP_BLE_SCAN_STOP_COMPLETE_EVT: {
ESP_LOGV(TAG, "BLE GAP EVENT SCAN CANCELED");
break;
}
/*
* ADVERTISEMENT
* */
case ESP_GAP_BLE_ADV_DATA_SET_COMPLETE_EVT:
ESP_LOGV(TAG, "BLE GAP ADV_DATA_SET_COMPLETE");
break;
case ESP_GAP_BLE_ADV_START_COMPLETE_EVT:
ESP_LOGV(TAG, "BLE GAP ADV_START_COMPLETE");
break;
/*
* AUTHENTICATION
* */
case ESP_GAP_BLE_AUTH_CMPL_EVT:
if (!param->ble_security.auth_cmpl.success) {
ESP_LOGE(TAG, "BLE GAP AUTH ERROR: 0x%x", param->ble_security.auth_cmpl.fail_reason);
} else {
ESP_LOGI(TAG, "BLE GAP AUTH SUCCESS");
}
break;
case ESP_GAP_BLE_KEY_EVT: //shows the ble key info share with peer device to the user.
ESP_LOGI(TAG, "BLE GAP KEY type = %s", esp_ble_key_type_str(param->ble_security.ble_key.key_type));
break;
case ESP_GAP_BLE_PASSKEY_NOTIF_EVT: // ESP_IO_CAP_OUT
// The app will receive this evt when the IO has Output capability and the peer device IO has Input capability.
// Show the passkey number to the user to input it in the peer device.
ESP_LOGI(TAG, "BLE GAP PASSKEY_NOTIF passkey:%"PRIu32, param->ble_security.key_notif.passkey);
break;
case ESP_GAP_BLE_NC_REQ_EVT: // ESP_IO_CAP_IO
// The app will receive this event when the IO has DisplayYesNO capability and the peer device IO also has DisplayYesNo capability.
// show the passkey number to the user to confirm it with the number displayed by peer device.
ESP_LOGI(TAG, "BLE GAP NC_REQ passkey:%"PRIu32, param->ble_security.key_notif.passkey);
esp_ble_confirm_reply(param->ble_security.key_notif.bd_addr, true);
break;
case ESP_GAP_BLE_PASSKEY_REQ_EVT: // ESP_IO_CAP_IN
// The app will receive this evt when the IO has Input capability and the peer device IO has Output capability.
// See the passkey number on the peer device and send it back.
ESP_LOGI(TAG, "BLE GAP PASSKEY_REQ");
//esp_ble_passkey_reply(param->ble_security.ble_req.bd_addr, true, 1234);
break;
case ESP_GAP_BLE_SEC_REQ_EVT:
ESP_LOGI(TAG, "BLE GAP SEC_REQ");
// Send the positive(true) security response to the peer device to accept the security request.
// If not accept the security request, should send the security response with negative(false) accept value.
esp_ble_gap_security_rsp(param->ble_security.ble_req.bd_addr, true);
break;
default:
ESP_LOGV(TAG, "BLE GAP EVENT %s", ble_gap_evt_str(event));
break;
}
}
#endif
static esp_err_t init_ble_gap(void)
{
esp_err_t ret;
if ((ret = esp_ble_gap_register_callback(ble_gap_event_handler)) != ESP_OK) {
ESP_LOGE(TAG, "esp_ble_gap_register_callback failed: %d", ret);
return ret;
}
return ret;
}
static esp_ble_scan_params_t hid_scan_params = {
.scan_type = BLE_SCAN_TYPE_ACTIVE,
.own_addr_type = BLE_ADDR_TYPE_PUBLIC,
.scan_filter_policy = BLE_SCAN_FILTER_ALLOW_ALL,
.scan_interval = 0x50,
.scan_window = 0x30,
.scan_duplicate = BLE_SCAN_DUPLICATE_ENABLE,
};
static esp_err_t start_ble_scan(uint32_t seconds)
{
esp_err_t ret = ESP_OK;
if ((ret = esp_ble_gap_set_scan_params(&hid_scan_params)) != ESP_OK) {
ESP_LOGE(TAG, "esp_ble_gap_set_scan_params failed: %d", ret);
return ret;
}
WAIT_BLE_CB();
if ((ret = esp_ble_gap_start_scanning(seconds)) != ESP_OK) {
ESP_LOGE(TAG, "esp_ble_gap_start_scanning failed: %d", ret);
return ret;
}
return ret;
}
esp_err_t esp_hid_ble_gap_adv_init(uint16_t appearance, const char *device_name)
{
esp_err_t ret;
const uint8_t hidd_service_uuid128[] = {
0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80, 0x00, 0x10, 0x00, 0x00, 0x12, 0x18, 0x00, 0x00,
};
esp_ble_adv_data_t ble_adv_data = {
.set_scan_rsp = false,
.include_name = true,
.include_txpower = true,
.min_interval = 0x0006, //slave connection min interval, Time = min_interval * 1.25 msec
.max_interval = 0x0010, //slave connection max interval, Time = max_interval * 1.25 msec
.appearance = appearance,
.manufacturer_len = 0,
.p_manufacturer_data = NULL,
.service_data_len = 0,
.p_service_data = NULL,
.service_uuid_len = sizeof(hidd_service_uuid128),
.p_service_uuid = (uint8_t *)hidd_service_uuid128,
.flag = 0x6,
};
esp_ble_auth_req_t auth_req = ESP_LE_AUTH_REQ_SC_MITM_BOND;
//esp_ble_io_cap_t iocap = ESP_IO_CAP_OUT;//you have to enter the key on the host
//esp_ble_io_cap_t iocap = ESP_IO_CAP_IN;//you have to enter the key on the device
esp_ble_io_cap_t iocap = ESP_IO_CAP_IO;//you have to agree that key matches on both
//esp_ble_io_cap_t iocap = ESP_IO_CAP_NONE;//device is not capable of input or output, unsecure
uint8_t init_key = ESP_BLE_ENC_KEY_MASK | ESP_BLE_ID_KEY_MASK;
uint8_t rsp_key = ESP_BLE_ENC_KEY_MASK | ESP_BLE_ID_KEY_MASK;
uint8_t key_size = 16; //the key size should be 7~16 bytes
uint32_t passkey = 1234;//ESP_IO_CAP_OUT
if ((ret = esp_ble_gap_set_security_param(ESP_BLE_SM_AUTHEN_REQ_MODE, &auth_req, 1)) != ESP_OK) {
ESP_LOGE(TAG, "GAP set_security_param AUTHEN_REQ_MODE failed: %d", ret);
return ret;
}
if ((ret = esp_ble_gap_set_security_param(ESP_BLE_SM_IOCAP_MODE, &iocap, 1)) != ESP_OK) {
ESP_LOGE(TAG, "GAP set_security_param IOCAP_MODE failed: %d", ret);
return ret;
}
if ((ret = esp_ble_gap_set_security_param(ESP_BLE_SM_SET_INIT_KEY, &init_key, 1)) != ESP_OK) {
ESP_LOGE(TAG, "GAP set_security_param SET_INIT_KEY failed: %d", ret);
return ret;
}
if ((ret = esp_ble_gap_set_security_param(ESP_BLE_SM_SET_RSP_KEY, &rsp_key, 1)) != ESP_OK) {
ESP_LOGE(TAG, "GAP set_security_param SET_RSP_KEY failed: %d", ret);
return ret;
}
if ((ret = esp_ble_gap_set_security_param(ESP_BLE_SM_MAX_KEY_SIZE, &key_size, 1)) != ESP_OK) {
ESP_LOGE(TAG, "GAP set_security_param MAX_KEY_SIZE failed: %d", ret);
return ret;
}
if ((ret = esp_ble_gap_set_security_param(ESP_BLE_SM_SET_STATIC_PASSKEY, &passkey, sizeof(uint32_t))) != ESP_OK) {
ESP_LOGE(TAG, "GAP set_security_param SET_STATIC_PASSKEY failed: %d", ret);
return ret;
}
if ((ret = esp_bt_dev_set_device_name(device_name)) != ESP_OK) {
ESP_LOGE(TAG, "GAP set_device_name failed: %d", ret);
return ret;
}
if ((ret = esp_ble_gap_config_adv_data(&ble_adv_data)) != ESP_OK) {
ESP_LOGE(TAG, "GAP config_adv_data failed: %d", ret);
return ret;
}
return ret;
}
esp_err_t esp_hid_ble_gap_adv_start(void)
{
static esp_ble_adv_params_t hidd_adv_params = {
.adv_int_min = 0x20,
.adv_int_max = 0x30,
.adv_type = ADV_TYPE_IND,
.own_addr_type = BLE_ADDR_TYPE_PUBLIC,
.channel_map = ADV_CHNL_ALL,
.adv_filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY,
};
return esp_ble_gap_start_advertising(&hidd_adv_params);
}
#endif /* CONFIG_BT_BLE_ENABLED */
/*
* CONTROLLER INIT
* */
#if CONFIG_BT_NIMBLE_ENABLED
static esp_err_t init_low_level(uint8_t mode)
{
esp_err_t ret;
esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
#if CONFIG_IDF_TARGET_ESP32
bt_cfg.mode = mode;
#endif
ret = esp_bt_controller_mem_release(ESP_BT_MODE_CLASSIC_BT);
if (ret) {
ESP_LOGE(TAG, "esp_bt_controller_mem_release failed: %d", ret);
return ret;
}
ret = esp_bt_controller_init(&bt_cfg);
if (ret) {
ESP_LOGE(TAG, "esp_bt_controller_init failed: %d", ret);
return ret;
}
ret = esp_bt_controller_enable(mode);
if (ret) {
ESP_LOGE(TAG, "esp_bt_controller_enable failed: %d", ret);
return ret;
}
ret = esp_nimble_init();
if (ret) {
ESP_LOGE(TAG, "esp_nimble_init failed: %d", ret);
return ret;
}
return ret;
}
static void handle_ble_device_result(const struct ble_gap_disc_desc *disc)
{
int rc;
struct ble_hs_adv_fields fields;
uint16_t appearance;
uint8_t adv_name[BLE_HS_ADV_MAX_SZ];
uint8_t adv_name_len = 0;
appearance = 0; /* silent warnings for now */
rc = ble_hs_adv_parse_fields(&fields, disc->data, disc->length_data);
if(rc != 0) {
return;
}
if (fields.name != NULL) {
assert(fields.name_len < sizeof adv_name - 1);
memcpy(adv_name, fields.name, fields.name_len);
adv_name[fields.name_len] = '\0';
adv_name_len = fields.name_len;
MODLOG_DFLT(DEBUG, " name(%scomplete)=%s\n",
fields.name_is_complete ? "" : "in", adv_name);
}
if (fields.appearance_is_present) {
MODLOG_DFLT(DEBUG, " appearance=0x%04x\n", fields.appearance);
appearance = fields.appearance;
}
for (int i = 0; i < fields.num_uuids16; i++) {
if (ble_uuid_u16(&fields.uuids16[i].u) == BLE_HID_SVC_UUID &&
((adv_name_len > 0 && memcmp("ESP BLE HID2", adv_name, adv_name_len) == 0) ||
(adv_name_len > 0 && memcmp("ESP Mouse", adv_name, adv_name_len) == 0) ||
(adv_name_len > 0 && memcmp("ESP Keyboard", adv_name, adv_name_len) == 0))) {
add_ble_scan_result(disc->addr.val, disc->addr.type, appearance, adv_name, adv_name_len, disc->rssi);
break;
}
}
}
#endif
#if CONFIG_BT_NIMBLE_ENABLED
static int
nimble_hid_gap_event(struct ble_gap_event *event, void *arg)
{
struct ble_gap_conn_desc desc;
int rc;
switch (event->type) {
case BLE_GAP_EVENT_DISC:
handle_ble_device_result(&event->disc);
if (rc != 0) {
return 0;
}
/* An advertisment report was received during GAP discovery. */
return 0;
break;
case BLE_GAP_EVENT_DISC_COMPLETE:
MODLOG_DFLT(INFO, "discovery complete; reason=%d\n",
event->disc_complete.reason);
SEND_BLE_CB();
return 0;
case BLE_GAP_EVENT_CONNECT:
/* A new connection was established or a connection attempt failed. */
ESP_LOGI(TAG, "connection %s; status=%d",
event->connect.status == 0 ? "established" : "failed",
event->connect.status);
return 0;
break;
case BLE_GAP_EVENT_DISCONNECT:
ESP_LOGI(TAG, "disconnect; reason=%d", event->disconnect.reason);
return 0;
case BLE_GAP_EVENT_CONN_UPDATE:
/* The central has updated the connection parameters. */
ESP_LOGI(TAG, "connection updated; status=%d",
event->conn_update.status);
return 0;
case BLE_GAP_EVENT_ADV_COMPLETE:
ESP_LOGI(TAG, "advertise complete; reason=%d",
event->adv_complete.reason);
return 0;
case BLE_GAP_EVENT_SUBSCRIBE:
ESP_LOGI(TAG, "subscribe event; conn_handle=%d attr_handle=%d "
"reason=%d prevn=%d curn=%d previ=%d curi=%d\n",
event->subscribe.conn_handle,
event->subscribe.attr_handle,
event->subscribe.reason,
event->subscribe.prev_notify,
event->subscribe.cur_notify,
event->subscribe.prev_indicate,
event->subscribe.cur_indicate);
return 0;
case BLE_GAP_EVENT_MTU:
ESP_LOGI(TAG, "mtu update event; conn_handle=%d cid=%d mtu=%d",
event->mtu.conn_handle,
event->mtu.channel_id,
event->mtu.value);
return 0;
case BLE_GAP_EVENT_ENC_CHANGE:
/* Encryption has been enabled or disabled for this connection. */
MODLOG_DFLT(INFO, "encryption change event; status=%d ",
event->enc_change.status);
rc = ble_gap_conn_find(event->enc_change.conn_handle, &desc);
assert(rc == 0);
return 0;
case BLE_GAP_EVENT_NOTIFY_TX:
MODLOG_DFLT(INFO, "notify_tx event; conn_handle=%d attr_handle=%d "
"status=%d is_indication=%d",
event->notify_tx.conn_handle,
event->notify_tx.attr_handle,
event->notify_tx.status,
event->notify_tx.indication);
return 0;
case BLE_GAP_EVENT_REPEAT_PAIRING:
/* We already have a bond with the peer, but it is attempting to
* establish a new secure link. This app sacrifices security for
* convenience: just throw away the old bond and accept the new link.
*/
/* Delete the old bond. */
rc = ble_gap_conn_find(event->repeat_pairing.conn_handle, &desc);
assert(rc == 0);
ble_store_util_delete_peer(&desc.peer_id_addr);
/* Return BLE_GAP_REPEAT_PAIRING_RETRY to indicate that the host should
* continue with the pairing operation.
*/
return BLE_GAP_REPEAT_PAIRING_RETRY;
case BLE_GAP_EVENT_PASSKEY_ACTION:
ESP_LOGI(TAG, "PASSKEY_ACTION_EVENT started");
struct ble_sm_io pkey = {0};
int key = 0;
if (event->passkey.params.action == BLE_SM_IOACT_DISP) {
pkey.action = event->passkey.params.action;
pkey.passkey = 123456; // This is the passkey to be entered on peer
ESP_LOGI(TAG, "Enter passkey %" PRIu32 "on the peer side", pkey.passkey);
rc = ble_sm_inject_io(event->passkey.conn_handle, &pkey);
ESP_LOGI(TAG, "ble_sm_inject_io result: %d", rc);
} else if (event->passkey.params.action == BLE_SM_IOACT_NUMCMP) {
ESP_LOGI(TAG, "Accepting passkey..");
pkey.action = event->passkey.params.action;
pkey.numcmp_accept = key;
rc = ble_sm_inject_io(event->passkey.conn_handle, &pkey);
ESP_LOGI(TAG, "ble_sm_inject_io result: %d", rc);
} else if (event->passkey.params.action == BLE_SM_IOACT_OOB) {
static uint8_t tem_oob[16] = {0};
pkey.action = event->passkey.params.action;
for (int i = 0; i < 16; i++) {
pkey.oob[i] = tem_oob[i];
}
rc = ble_sm_inject_io(event->passkey.conn_handle, &pkey);
ESP_LOGI(TAG, "ble_sm_inject_io result: %d", rc);
} else if (event->passkey.params.action == BLE_SM_IOACT_INPUT) {
ESP_LOGI(TAG, "Input not supported passing -> 123456");
pkey.action = event->passkey.params.action;
pkey.passkey = 123456;
rc = ble_sm_inject_io(event->passkey.conn_handle, &pkey);
ESP_LOGI(TAG, "ble_sm_inject_io result: %d", rc);
}
return 0;
}
return 0;
}
static esp_err_t start_nimble_scan(uint32_t seconds)
{
uint8_t own_addr_type;
struct ble_gap_disc_params disc_params;
int rc;
/* Figure out address to use while advertising (no privacy for now) */
rc = ble_hs_id_infer_auto(0, &own_addr_type);
if (rc != 0) {
MODLOG_DFLT(ERROR, "error determining address type; rc=%d\n", rc);
return rc;
}
/* Tell the controller to filter duplicates; we don't want to process
* repeated advertisements from the same device.
*/
disc_params.filter_duplicates = 1;
/**
* Perform active scan.
*/
disc_params.passive = 0;
/* Use defaults for the rest of the parameters. */
disc_params.itvl = 0x50;
disc_params.window = 0x30;
disc_params.filter_policy = 0;
disc_params.limited = 0;
rc = ble_gap_disc(own_addr_type, seconds * 1000, &disc_params,
nimble_hid_gap_event, NULL);
if (rc != 0) {
MODLOG_DFLT(ERROR, "Error initiating GAP discovery procedure; rc=%d\n",
rc);
}
return rc;
}
#else
static esp_err_t init_low_level(uint8_t mode)
{
esp_err_t ret;
esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
#if CONFIG_IDF_TARGET_ESP32
bt_cfg.mode = mode;
#endif
#if CONFIG_BT_HID_HOST_ENABLED
if (mode & ESP_BT_MODE_CLASSIC_BT) {
bt_cfg.bt_max_acl_conn = 3;
bt_cfg.bt_max_sync_conn = 3;
} else
#endif
{
ret = esp_bt_controller_mem_release(ESP_BT_MODE_CLASSIC_BT);
if (ret) {
ESP_LOGE(TAG, "esp_bt_controller_mem_release failed: %d", ret);
return ret;
}
}
ret = esp_bt_controller_init(&bt_cfg);
if (ret) {
ESP_LOGE(TAG, "esp_bt_controller_init failed: %d", ret);
return ret;
}
ret = esp_bt_controller_enable(mode);
if (ret) {
ESP_LOGE(TAG, "esp_bt_controller_enable failed: %d", ret);
return ret;
}
esp_bluedroid_config_t bluedroid_cfg = BT_BLUEDROID_INIT_CONFIG_DEFAULT();
#if (CONFIG_EXAMPLE_SSP_ENABLED == false)
bluedroid_cfg.ssp_en = false;
#endif
ret = esp_bluedroid_init_with_cfg(&bluedroid_cfg);
if (ret) {
ESP_LOGE(TAG, "esp_bluedroid_init failed: %d", ret);
return ret;
}
ret = esp_bluedroid_enable();
if (ret) {
ESP_LOGE(TAG, "esp_bluedroid_enable failed: %d", ret);
return ret;
}
#if CONFIG_BT_HID_HOST_ENABLED
if (mode & ESP_BT_MODE_CLASSIC_BT) {
ret = init_bt_gap();
if (ret) {
return ret;
}
}
#endif
#if CONFIG_BT_BLE_ENABLED
if (mode & ESP_BT_MODE_BLE) {
ret = init_ble_gap();
if (ret) {
return ret;
}
}
#endif /* CONFIG_BT_BLE_ENABLED */
return ret;
}
#endif
esp_err_t esp_hid_gap_init(uint8_t mode)
{
esp_err_t ret;
if (!mode || mode > ESP_BT_MODE_BTDM) {
ESP_LOGE(TAG, "Invalid mode given!");
return ESP_FAIL;
}
if (bt_hidh_cb_semaphore != NULL) {
ESP_LOGE(TAG, "Already initialised");
return ESP_FAIL;
}
bt_hidh_cb_semaphore = xSemaphoreCreateBinary();
if (bt_hidh_cb_semaphore == NULL) {
ESP_LOGE(TAG, "xSemaphoreCreateMutex failed!");
return ESP_FAIL;
}
ble_hidh_cb_semaphore = xSemaphoreCreateBinary();
if (ble_hidh_cb_semaphore == NULL) {
ESP_LOGE(TAG, "xSemaphoreCreateMutex failed!");
vSemaphoreDelete(bt_hidh_cb_semaphore);
bt_hidh_cb_semaphore = NULL;
return ESP_FAIL;
}
ret = init_low_level(mode);
if (ret != ESP_OK) {
vSemaphoreDelete(bt_hidh_cb_semaphore);
bt_hidh_cb_semaphore = NULL;
vSemaphoreDelete(ble_hidh_cb_semaphore);
ble_hidh_cb_semaphore = NULL;
return ret;
}
return ESP_OK;
}
esp_err_t esp_hid_scan(uint32_t seconds, size_t *num_results, esp_hid_scan_result_t **results)
{
if (num_bt_scan_results || bt_scan_results || num_ble_scan_results || ble_scan_results) {
ESP_LOGE(TAG, "There are old scan results. Free them first!");
return ESP_FAIL;
}
#if CONFIG_BT_BLE_ENABLED
if (start_ble_scan(seconds) == ESP_OK) {
WAIT_BLE_CB();
} else {
return ESP_FAIL;
}
#endif /* CONFIG_BT_BLE_ENABLED */
#if CONFIG_BT_NIMBLE_ENABLED
if (start_nimble_scan(seconds) == ESP_OK) {
WAIT_BLE_CB();
} else {
return ESP_FAIL;
}
#endif /* CONFIG_BT_BLE_ENABLED */
#if CONFIG_BT_HID_HOST_ENABLED
if (start_bt_scan(seconds) == ESP_OK) {
WAIT_BT_CB();
} else {
return ESP_FAIL;
}
#endif
*num_results = num_bt_scan_results + num_ble_scan_results;
*results = bt_scan_results;
if (num_bt_scan_results) {
while (bt_scan_results->next != NULL) {
bt_scan_results = bt_scan_results->next;
}
bt_scan_results->next = ble_scan_results;
} else {
*results = ble_scan_results;
}
num_bt_scan_results = 0;
bt_scan_results = NULL;
num_ble_scan_results = 0;
ble_scan_results = NULL;
return ESP_OK;
}
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