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esp-idf/examples/bluetooth/nimble/bleprph_wifi_coex/main/main.c
Nachiket Kukade 6fd6a8b40b esp_wifi: Always connect Station in PMF mode if possible 
While using esp_wifi_set_config, flag pmf_capable defaults to 0.
Users may not bother to enable it, which prevents connection to a
WPA3 AP. Or the AP may reset into WPA3 mode failing the re-connection.
To ensure better security, deprecate the pmf_capable flag and set it to
true internally.
2022-03-10 17:16:32 +05:30

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// Copyright 2015-2020 The Apache Software Foundation
// Modifications Copyright 2017-2020 Espressif Systems (Shanghai) CO., LTD.
//
// Portions of this software were developed at Runtime Inc, copyright 2015.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "esp_log.h"
#include "nvs_flash.h"
/* BLE */
#include "esp_nimble_hci.h"
#include "nimble/nimble_port.h"
#include "nimble/nimble_port_freertos.h"
#include "host/ble_hs.h"
#include "host/util/util.h"
#include "console/console.h"
#include "services/gap/ble_svc_gap.h"
#include "bleprph.h"
/* WIFI */
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "esp_system.h"
#include "esp_wifi.h"
#include "esp_event.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "ping/ping_sock.h"
#include "lwip/err.h"
#include "lwip/sys.h"
#include "lwip/inet.h"
#include "lwip/netdb.h"
#include "lwip/sockets.h"
#define EXAMPLE_ESP_WIFI_SSID CONFIG_EXAMPLE_ESP_WIFI_SSID
#define EXAMPLE_ESP_WIFI_PASS CONFIG_EXAMPLE_ESP_WIFI_PASSWORD
#define EXAMPLE_ESP_MAXIMUM_RETRY CONFIG_EXAMPLE_ESP_MAXIMUM_RETRY
#define EXAMPLE_PING_IP CONFIG_EXAMPLE_ESP_PING_IP
#define EXAMPLE_PING_COUNT CONFIG_EXAMPLE_ESP_PING_COUNT
#define EXAMPLE_PING_INTERVAL 1
static int bleprph_gap_event(struct ble_gap_event *event, void *arg);
static uint8_t own_addr_type;
/* FreeRTOS event group to signal when we are connected*/
static EventGroupHandle_t s_wifi_event_group;
/* The event group allows multiple bits for each event, but we only care about two events:
* - we are connected to the AP with an IP
* - we failed to connect after the maximum amount of retries */
#define WIFI_CONNECTED_BIT BIT0
#define WIFI_FAIL_BIT BIT1
static const char *TAG = "wifi_prph_coex";
static int s_retry_num = 0;
static void event_handler(void* arg, esp_event_base_t event_base,
int32_t event_id, void* event_data)
{
if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
esp_wifi_connect();
} else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
if (s_retry_num < EXAMPLE_ESP_MAXIMUM_RETRY) {
esp_wifi_connect();
s_retry_num++;
ESP_LOGI(TAG, "retry to connect to the AP");
} else {
xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
}
ESP_LOGI(TAG,"connect to the AP fail");
} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
s_retry_num = 0;
xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
}
}
void wifi_init_sta(void)
{
s_wifi_event_group = xEventGroupCreate();
ESP_ERROR_CHECK(esp_netif_init());
ESP_ERROR_CHECK(esp_event_loop_create_default());
esp_netif_create_default_wifi_sta();
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
esp_event_handler_instance_t instance_any_id;
esp_event_handler_instance_t instance_got_ip;
ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT,
ESP_EVENT_ANY_ID,
&event_handler,
NULL,
&instance_any_id));
ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT,
IP_EVENT_STA_GOT_IP,
&event_handler,
NULL,
&instance_got_ip));
wifi_config_t wifi_config = {
.sta = {
.ssid = EXAMPLE_ESP_WIFI_SSID,
.password = EXAMPLE_ESP_WIFI_PASS,
/* Setting a password implies station will connect to all security modes including WEP/WPA.
* However these modes are deprecated and not advisable to be used. Incase your Access point
* doesn't support WPA2, these mode can be enabled by commenting below line */
.threshold.authmode = WIFI_AUTH_WPA2_PSK,
},
};
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA) );
ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_config) );
ESP_ERROR_CHECK(esp_wifi_start() );
ESP_LOGI(TAG, "wifi_init_sta finished.");
/* Waiting until either the connection is established (WIFI_CONNECTED_BIT) or connection failed for the maximum
* number of re-tries (WIFI_FAIL_BIT). The bits are set by event_handler() (see above) */
EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
pdFALSE,
pdFALSE,
portMAX_DELAY);
/* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually
* happened. */
if (bits & WIFI_CONNECTED_BIT) {
ESP_LOGI(TAG, "connected to ap SSID:%s password:%s",
EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
} else if (bits & WIFI_FAIL_BIT) {
ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s",
EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
} else {
ESP_LOGE(TAG, "UNEXPECTED EVENT");
}
/* The event will not be processed after unregister */
ESP_ERROR_CHECK(esp_event_handler_instance_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP, instance_got_ip));
ESP_ERROR_CHECK(esp_event_handler_instance_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, instance_any_id));
vEventGroupDelete(s_wifi_event_group);
}
static void cmd_ping_on_ping_success(esp_ping_handle_t hdl, void *args)
{
uint8_t ttl;
uint16_t seqno;
uint32_t elapsed_time, recv_len;
ip_addr_t target_addr;
esp_ping_get_profile(hdl, ESP_PING_PROF_SEQNO, &seqno, sizeof(seqno));
esp_ping_get_profile(hdl, ESP_PING_PROF_TTL, &ttl, sizeof(ttl));
esp_ping_get_profile(hdl, ESP_PING_PROF_IPADDR, &target_addr, sizeof(target_addr));
esp_ping_get_profile(hdl, ESP_PING_PROF_SIZE, &recv_len, sizeof(recv_len));
esp_ping_get_profile(hdl, ESP_PING_PROF_TIMEGAP, &elapsed_time, sizeof(elapsed_time));
printf("%d bytes from %s icmp_seq=%d ttl=%d time=%d ms\n",
recv_len, inet_ntoa(target_addr.u_addr.ip4), seqno, ttl, elapsed_time);
}
static void cmd_ping_on_ping_timeout(esp_ping_handle_t hdl, void *args)
{
uint16_t seqno;
ip_addr_t target_addr;
esp_ping_get_profile(hdl, ESP_PING_PROF_SEQNO, &seqno, sizeof(seqno));
esp_ping_get_profile(hdl, ESP_PING_PROF_IPADDR, &target_addr, sizeof(target_addr));
printf("From %s icmp_seq=%d timeout\n", inet_ntoa(target_addr.u_addr.ip4), seqno);
}
static void cmd_ping_on_ping_end(esp_ping_handle_t hdl, void *args)
{
ip_addr_t target_addr;
uint32_t transmitted;
uint32_t received;
uint32_t total_time_ms;
esp_ping_get_profile(hdl, ESP_PING_PROF_REQUEST, &transmitted, sizeof(transmitted));
esp_ping_get_profile(hdl, ESP_PING_PROF_REPLY, &received, sizeof(received));
esp_ping_get_profile(hdl, ESP_PING_PROF_IPADDR, &target_addr, sizeof(target_addr));
esp_ping_get_profile(hdl, ESP_PING_PROF_DURATION, &total_time_ms, sizeof(total_time_ms));
uint32_t loss = (uint32_t)((1 - ((float)received) / transmitted) * 100);
if (IP_IS_V4(&target_addr)) {
printf("\n--- %s ping statistics ---\n", inet_ntoa(*ip_2_ip4(&target_addr)));
} else {
printf("\n--- %s ping statistics ---\n", inet6_ntoa(*ip_2_ip6(&target_addr)));
}
printf("%d packets transmitted, %d received, %d%% packet loss, time %dms\n",
transmitted, received, loss, total_time_ms);
// delete the ping sessions, so that we clean up all resources and can create a new ping session
// we don't have to call delete function in the callback, instead we can call delete function from other tasks
esp_ping_delete_session(hdl);
}
static int do_ping_cmd(void)
{
esp_ping_config_t config = ESP_PING_DEFAULT_CONFIG();
static esp_ping_handle_t ping;
config.interval_ms = (uint32_t)(EXAMPLE_PING_INTERVAL * 1000);
config.count = (uint32_t)(EXAMPLE_PING_COUNT);
// parse IP address
ip_addr_t target_addr;
struct addrinfo hint;
struct addrinfo *res = NULL;
memset(&hint, 0, sizeof(hint));
memset(&target_addr, 0, sizeof(target_addr));
/* convert domain name to IP address */
if (getaddrinfo(EXAMPLE_PING_IP, NULL, &hint, &res) != 0) {
printf("ping: unknown host %s\n", EXAMPLE_PING_IP);
return 1;
}
if (res->ai_family == AF_INET) {
struct in_addr addr4 = ((struct sockaddr_in *) (res->ai_addr))->sin_addr;
inet_addr_to_ip4addr(ip_2_ip4(&target_addr), &addr4);
} else {
struct in6_addr addr6 = ((struct sockaddr_in6 *) (res->ai_addr))->sin6_addr;
inet6_addr_to_ip6addr(ip_2_ip6(&target_addr), &addr6);
}
freeaddrinfo(res);
config.target_addr = target_addr;
/* set callback functions */
esp_ping_callbacks_t cbs = {
.on_ping_success = cmd_ping_on_ping_success,
.on_ping_timeout = cmd_ping_on_ping_timeout,
.on_ping_end = cmd_ping_on_ping_end,
.cb_args = NULL
};
esp_ping_new_session(&config, &cbs, &ping);
esp_ping_start(ping);
return 0;
}
void ble_store_config_init(void);
/**
* Logs information about a connection to the console.
*/
static void
bleprph_print_conn_desc(struct ble_gap_conn_desc *desc)
{
ESP_LOGI(TAG, "handle=%d our_ota_addr_type=%d our_ota_addr=%02x:%02x:%02x:%02x:%02x:%02x",
desc->conn_handle, desc->our_ota_addr.type,
desc->our_ota_addr.val[5],
desc->our_ota_addr.val[4],
desc->our_ota_addr.val[3],
desc->our_ota_addr.val[2],
desc->our_ota_addr.val[1],
desc->our_ota_addr.val[0]);
ESP_LOGI(TAG, "our_id_addr_type=%d our_id_addr=%02x:%02x:%02x:%02x:%02x:%02x",
desc->our_id_addr.type,
desc->our_id_addr.val[5],
desc->our_id_addr.val[4],
desc->our_id_addr.val[3],
desc->our_id_addr.val[2],
desc->our_id_addr.val[1],
desc->our_id_addr.val[0]);
ESP_LOGI(TAG, "peer_ota_addr_type=%d peer_ota_addr=%02x:%02x:%02x:%02x:%02x:%02x",
desc->peer_ota_addr.type,
desc->peer_ota_addr.val[5],
desc->peer_ota_addr.val[4],
desc->peer_ota_addr.val[3],
desc->peer_ota_addr.val[2],
desc->peer_ota_addr.val[1],
desc->peer_ota_addr.val[0]);
ESP_LOGI(TAG, "peer_id_addr_type=%d peer_id_addr=%02x:%02x:%02x:%02x:%02x:%02x",
desc->peer_id_addr.type,
desc->peer_id_addr.val[5],
desc->peer_id_addr.val[4],
desc->peer_id_addr.val[3],
desc->peer_id_addr.val[2],
desc->peer_id_addr.val[1],
desc->peer_id_addr.val[0]);
ESP_LOGI(TAG, "conn_itvl=%d conn_latency=%d supervision_timeout=%d "
"encrypted=%d authenticated=%d bonded=%d",
desc->conn_itvl, desc->conn_latency,
desc->supervision_timeout,
desc->sec_state.encrypted,
desc->sec_state.authenticated,
desc->sec_state.bonded);
}
/**
* Enables advertising with the following parameters:
* o General discoverable mode.
* o Undirected connectable mode.
*/
static void
bleprph_advertise(void)
{
struct ble_gap_adv_params adv_params;
struct ble_hs_adv_fields fields;
const char *name;
int rc;
/**
* Set the advertisement data included in our advertisements:
* o Flags (indicates advertisement type and other general info).
* o Advertising tx power.
* o Device name.
* o 16-bit service UUIDs (alert notifications).
*/
memset(&fields, 0, sizeof fields);
/* Advertise two flags:
* o Discoverability in forthcoming advertisement (general)
* o BLE-only (BR/EDR unsupported).
*/
fields.flags = BLE_HS_ADV_F_DISC_GEN |
BLE_HS_ADV_F_BREDR_UNSUP;
/* Indicate that the TX power level field should be included; have the
* stack fill this value automatically. This is done by assigning the
* special value BLE_HS_ADV_TX_PWR_LVL_AUTO.
*/
fields.tx_pwr_lvl_is_present = 1;
fields.tx_pwr_lvl = BLE_HS_ADV_TX_PWR_LVL_AUTO;
name = ble_svc_gap_device_name();
fields.name = (uint8_t *)name;
fields.name_len = strlen(name);
fields.name_is_complete = 1;
fields.uuids16 = (ble_uuid16_t[]) {
BLE_UUID16_INIT(GATT_SVR_SVC_ALERT_UUID)
};
fields.num_uuids16 = 1;
fields.uuids16_is_complete = 1;
rc = ble_gap_adv_set_fields(&fields);
if (rc != 0) {
ESP_LOGE(TAG, "error setting advertisement data; rc=%d", rc);
return;
}
/* Begin advertising. */
memset(&adv_params, 0, sizeof adv_params);
adv_params.conn_mode = BLE_GAP_CONN_MODE_UND;
adv_params.disc_mode = BLE_GAP_DISC_MODE_GEN;
rc = ble_gap_adv_start(own_addr_type, NULL, BLE_HS_FOREVER,
&adv_params, bleprph_gap_event, NULL);
if (rc != 0) {
ESP_LOGE(TAG, "error enabling advertisement; rc=%d", rc);
return;
}
}
/**
* The nimble host executes this callback when a GAP event occurs. The
* application associates a GAP event callback with each connection that forms.
* bleprph uses the same callback for all connections.
*
* @param event The type of event being signalled.
* @param ctxt Various information pertaining to the event.
* @param arg Application-specified argument; unused by
* bleprph.
*
* @return 0 if the application successfully handled the
* event; nonzero on failure. The semantics
* of the return code is specific to the
* particular GAP event being signalled.
*/
static int
bleprph_gap_event(struct ble_gap_event *event, void *arg)
{
struct ble_gap_conn_desc desc;
int rc;
switch (event->type) {
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);
if (event->connect.status == 0) {
rc = ble_gap_conn_find(event->connect.conn_handle, &desc);
assert(rc == 0);
bleprph_print_conn_desc(&desc);
}
if (event->connect.status != 0) {
/* Connection failed; resume advertising. */
bleprph_advertise();
}
return 0;
case BLE_GAP_EVENT_DISCONNECT:
ESP_LOGI(TAG, "disconnect; reason=%d ", event->disconnect.reason);
bleprph_print_conn_desc(&event->disconnect.conn);
/* Connection terminated; resume advertising. */
bleprph_advertise();
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);
rc = ble_gap_conn_find(event->conn_update.conn_handle, &desc);
assert(rc == 0);
bleprph_print_conn_desc(&desc);
return 0;
case BLE_GAP_EVENT_ADV_COMPLETE:
ESP_LOGI(TAG, "advertise complete; reason=%d",
event->adv_complete.reason);
bleprph_advertise();
return 0;
case BLE_GAP_EVENT_ENC_CHANGE:
/* Encryption has been enabled or disabled for this connection. */
ESP_LOGI(TAG, "encryption change event; status=%d ",
event->enc_change.status);
rc = ble_gap_conn_find(event->enc_change.conn_handle, &desc);
assert(rc == 0);
bleprph_print_conn_desc(&desc);
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",
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_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;
}
return 0;
}
static void
bleprph_on_reset(int reason)
{
ESP_LOGE(TAG, "Resetting state; reason=%d", reason);
}
static void
bleprph_on_sync(void)
{
int rc;
rc = ble_hs_util_ensure_addr(0);
assert(rc == 0);
/* Figure out address to use while advertising (no privacy for now) */
rc = ble_hs_id_infer_auto(0, &own_addr_type);
if (rc != 0) {
ESP_LOGE(TAG, "error determining address type; rc=%d", rc);
return;
}
/* Printing ADDR */
uint8_t addr_val[6] = {0};
rc = ble_hs_id_copy_addr(own_addr_type, addr_val, NULL);
ESP_LOGI(TAG, "Device Address:%02x:%02x:%02x:%02x:%02x:%02x",
addr_val[5],
addr_val[4],
addr_val[3],
addr_val[2],
addr_val[1],
addr_val[0]);
/* Begin advertising. */
bleprph_advertise();
}
void bleprph_host_task(void *param)
{
ESP_LOGI(TAG, "BLE Host Task Started");
/* This function will return only when nimble_port_stop() is executed */
nimble_port_run();
nimble_port_freertos_deinit();
}
void
app_main(void)
{
int rc;
/* Initialize NVS — it is used to store PHY calibration data */
esp_err_t ret = nvs_flash_init();
if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
ESP_ERROR_CHECK(nvs_flash_erase());
ret = nvs_flash_init();
}
ESP_ERROR_CHECK(ret);
ESP_LOGI(TAG, "ESP_WIFI_MODE_STA");
wifi_init_sta();
do_ping_cmd();
ESP_ERROR_CHECK(esp_nimble_hci_and_controller_init());
nimble_port_init();
/* Initialize the NimBLE host configuration. */
ble_hs_cfg.reset_cb = bleprph_on_reset;
ble_hs_cfg.sync_cb = bleprph_on_sync;
ble_hs_cfg.gatts_register_cb = gatt_svr_register_cb;
ble_hs_cfg.store_status_cb = ble_store_util_status_rr;
rc = gatt_svr_init();
assert(rc == 0);
/* Set the default device name. */
rc = ble_svc_gap_device_name_set("nimble-bleprph");
assert(rc == 0);
/* XXX Need to have template for store */
ble_store_config_init();
nimble_port_freertos_init(bleprph_host_task);
}
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