/*
* SPDX-FileCopyrightText: 2010-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
/*
* After station connects to AP and gets IP address by smartconfig,
* it will use UDP to send 'ACK' to cellphone.
*/
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_netif.h"
#include "esp_log.h"
#include "esp_wifi.h"
#include "esp_event.h"
#if CONFIG_ESP_NETIF_TCPIP_LWIP
#include <string.h>
#include "lwip/sockets.h"
#include "esp_smartconfig.h"
#include "smartconfig_ack.h"
#define SC_ACK_TASK_PRIORITY 2 /*!< Priority of sending smartconfig ACK task */
#define SC_ACK_TASK_STACK_SIZE 2048 /*!< Stack size of sending smartconfig ACK task */
#define SC_ACK_TOUCH_DEVICE_PORT 7001 /*!< ESPTouch UDP port of server on device */
#define SC_ACK_TOUCH_SERVER_PORT 18266 /*!< ESPTouch UDP port of server on cellphone */
#define SC_ACK_TOUCH_V2_SERVER_PORT(i) (18266+i*10000) /*!< ESPTouch v2 UDP port of server on cellphone */
#define SC_ACK_AIRKISS_SERVER_PORT 10000 /*!< Airkiss UDP port of server on cellphone */
#define SC_ACK_AIRKISS_DEVICE_PORT 10001 /*!< Airkiss UDP port of server on device */
#define SC_ACK_AIRKISS_TIMEOUT 1500 /*!< Airkiss read data timout millisecond */
#define SC_ACK_TOUCH_LEN 11 /*!< Length of ESPTouch ACK context */
#define SC_ACK_AIRKISS_LEN 7 /*!< Length of Airkiss ACK context */
#define SC_ACK_MAX_COUNT 30 /*!< Maximum count of sending smartconfig ACK */
/**
* @brief Smartconfig parameters passed to sc_ack_send call.
*/
typedef struct sc_ack {
smartconfig_type_t type; /*!< Smartconfig type(ESPTouch or AirKiss) */
struct {
uint8_t token; /*!< Smartconfig token from the cellphone */
uint8_t mac[6]; /*!< MAC address of station */
uint8_t ip[4]; /*!< IP address of cellphone */
} ctx;
} sc_ack_t;
static const char *TAG = "smartconfig";
/* Flag to indicate sending smartconfig ACK or not. */
static bool s_sc_ack_send = false;
static int sc_ack_send_get_errno(int fd)
{
int sock_errno = 0;
u32_t optlen = sizeof(sock_errno);
if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &sock_errno, &optlen) < 0) {
return sock_errno;
}
return 0;
}
static void sc_ack_send_task(void *pvParameters)
{
sc_ack_t *ack = (sc_ack_t *)pvParameters;
esp_netif_ip_info_t local_ip;
uint8_t remote_ip[4];
memcpy(remote_ip, ack->ctx.ip, sizeof(remote_ip));
struct sockaddr_in server_addr;
socklen_t sin_size = sizeof(server_addr);
int send_sock = -1;
int optval = 1;
int sendlen;
int ack_len = (ack->type == SC_TYPE_ESPTOUCH) ? SC_ACK_TOUCH_LEN : SC_ACK_AIRKISS_LEN;
uint8_t packet_count = 1;
int err;
int ret;
int remote_port = 0;
if (ack->type == SC_TYPE_ESPTOUCH) {
remote_port = SC_ACK_TOUCH_SERVER_PORT;
} else if (ack->type == SC_TYPE_ESPTOUCH_V2) {
uint8_t port_bit = ack->ctx.token;
if(port_bit > 3) {
port_bit = 0;
}
remote_port = SC_ACK_TOUCH_V2_SERVER_PORT(port_bit);
} else {
remote_port = SC_ACK_AIRKISS_SERVER_PORT;
}
bzero(&server_addr, sizeof(struct sockaddr_in));
server_addr.sin_family = AF_INET;
memcpy(&server_addr.sin_addr.s_addr, remote_ip, sizeof(remote_ip));
server_addr.sin_port = htons(remote_port);
esp_wifi_get_mac(WIFI_IF_STA, ack->ctx.mac);
vTaskDelay(200 / portTICK_PERIOD_MS);
while (s_sc_ack_send) {
/* Get local IP address of station */
ret = esp_netif_get_ip_info(esp_netif_get_handle_from_ifkey("WIFI_STA_DEF"), &local_ip);
if ((ESP_OK == ret) && (local_ip.ip.addr != INADDR_ANY)) {
/* If ESPTouch, smartconfig ACK contains local IP address. */
if (ack->type == SC_TYPE_ESPTOUCH) {
memcpy(ack->ctx.ip, &local_ip.ip.addr, 4);
}
/* Create UDP socket. */
send_sock = socket(AF_INET, SOCK_DGRAM, 0);
if ((send_sock < LWIP_SOCKET_OFFSET) || (send_sock > (FD_SETSIZE - 1))) {
ESP_LOGE(TAG, "Creat udp socket failed");
goto _end;
}
if (setsockopt(send_sock, SOL_SOCKET, SO_BROADCAST, &optval, sizeof(int)) < 0) {
ESP_LOGE(TAG, "setsockopt SO_BROADCAST failed");
goto _end;
}
if (setsockopt(send_sock, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(int)) < 0) {
ESP_LOGE(TAG, "setsockopt SO_REUSEADDR failed");
goto _end;
}
if (ack->type == SC_TYPE_AIRKISS) {
char data = 0;
struct sockaddr_in local_addr, from;
socklen_t sockadd_len = sizeof(struct sockaddr);
struct timeval timeout = {
SC_ACK_AIRKISS_TIMEOUT / 1000,
SC_ACK_AIRKISS_TIMEOUT % 1000 * 1000
};
bzero(&local_addr, sizeof(struct sockaddr_in));
bzero(&from, sizeof(struct sockaddr_in));
local_addr.sin_family = AF_INET;
local_addr.sin_addr.s_addr = INADDR_ANY;
if (ack->type == SC_TYPE_AIRKISS) {
local_addr.sin_port = htons(SC_ACK_AIRKISS_DEVICE_PORT);
} else {
local_addr.sin_port = htons(SC_ACK_TOUCH_DEVICE_PORT);
}
if (bind(send_sock, (struct sockaddr *)&local_addr, sockadd_len) < 0) {
ESP_LOGE(TAG, "socket bind failed");
goto _end;
}
if (setsockopt(send_sock, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout)) < 0) {
goto _end;
}
if (recvfrom(send_sock, &data, 1, 0, (struct sockaddr *)&from, &sockadd_len) < 0) {
goto _end;
}
if (from.sin_addr.s_addr != INADDR_ANY) {
memcpy(remote_ip, &from.sin_addr, 4);
server_addr.sin_addr.s_addr = from.sin_addr.s_addr;
} else {
goto _end;
}
}
while (s_sc_ack_send) {
/* Send smartconfig ACK every 100ms. */
vTaskDelay(100 / portTICK_PERIOD_MS);
sendlen = sendto(send_sock, &ack->ctx, ack_len, 0, (struct sockaddr*) &server_addr, sin_size);
if (sendlen <= 0) {
err = sc_ack_send_get_errno(send_sock);
ESP_LOGD(TAG, "send failed, errno %d", err);
vTaskDelay(100 / portTICK_PERIOD_MS);
}
/* Send 30 smartconfig ACKs. Then smartconfig is successful. */
if (packet_count++ >= SC_ACK_MAX_COUNT) {
esp_event_post(SC_EVENT, SC_EVENT_SEND_ACK_DONE, NULL, 0, portMAX_DELAY);
goto _end;
}
}
}
else {
vTaskDelay((TickType_t)(100 / portTICK_PERIOD_MS));
}
}
_end:
close(send_sock);
free(ack);
vTaskDelete(NULL);
}
esp_err_t sc_send_ack_start(smartconfig_type_t type, uint8_t token, uint8_t *cellphone_ip)
{
sc_ack_t *ack = NULL;
if (cellphone_ip == NULL) {
ESP_LOGE(TAG, "Cellphone IP address is NULL");
return ESP_ERR_INVALID_ARG;
}
ack = malloc(sizeof(sc_ack_t));
if (ack == NULL) {
ESP_LOGE(TAG, "ACK parameter malloc fail");
return ESP_ERR_NO_MEM;
}
ack->type = type;
ack->ctx.token = token;
memcpy(ack->ctx.ip, cellphone_ip, 4);
s_sc_ack_send = true;
if (xTaskCreate(sc_ack_send_task, "sc_ack_send_task", SC_ACK_TASK_STACK_SIZE, ack, SC_ACK_TASK_PRIORITY, NULL) != pdPASS) {
ESP_LOGE(TAG, "Create sending smartconfig ACK task fail");
free(ack);
return ESP_ERR_NO_MEM;
}
return ESP_OK;
}
void sc_send_ack_stop(void)
{
s_sc_ack_send = false;
}
#endif