mirror of
https://github.com/espressif/esp-idf.git
synced 2025-11-04 09:01:40 +01:00
93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/*
|
|
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
|
|
*
|
|
* SPDX-License-Identifier: Unlicense OR CC0-1.0
|
|
*/
|
|
#include "sdkconfig.h"
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sys/socket.h>
|
|
#include <errno.h>
|
|
#include <netdb.h> // struct addrinfo
|
|
#include <arpa/inet.h>
|
|
#include "esp_netif.h"
|
|
#include "esp_log.h"
|
|
#if defined(CONFIG_EXAMPLE_SOCKET_IP_INPUT_STDIN)
|
|
#include "addr_from_stdin.h"
|
|
#endif
|
|
|
|
#if defined(CONFIG_EXAMPLE_IPV4)
|
|
#define HOST_IP_ADDR CONFIG_EXAMPLE_IPV4_ADDR
|
|
#elif defined(CONFIG_EXAMPLE_SOCKET_IP_INPUT_STDIN)
|
|
#define HOST_IP_ADDR ""
|
|
#endif
|
|
|
|
#define PORT CONFIG_EXAMPLE_PORT
|
|
|
|
static const char *TAG = "example";
|
|
static const char *payload = "Message from ESP32 ";
|
|
|
|
|
|
void tcp_client(void)
|
|
{
|
|
char rx_buffer[128];
|
|
char host_ip[] = HOST_IP_ADDR;
|
|
int addr_family = 0;
|
|
int ip_protocol = 0;
|
|
|
|
while (1) {
|
|
#if defined(CONFIG_EXAMPLE_IPV4)
|
|
struct sockaddr_in dest_addr;
|
|
inet_pton(AF_INET, host_ip, &dest_addr.sin_addr);
|
|
dest_addr.sin_family = AF_INET;
|
|
dest_addr.sin_port = htons(PORT);
|
|
addr_family = AF_INET;
|
|
ip_protocol = IPPROTO_IP;
|
|
#elif defined(CONFIG_EXAMPLE_SOCKET_IP_INPUT_STDIN)
|
|
struct sockaddr_storage dest_addr = { 0 };
|
|
ESP_ERROR_CHECK(get_addr_from_stdin(PORT, SOCK_STREAM, &ip_protocol, &addr_family, &dest_addr));
|
|
#endif
|
|
|
|
int sock = socket(addr_family, SOCK_STREAM, ip_protocol);
|
|
if (sock < 0) {
|
|
ESP_LOGE(TAG, "Unable to create socket: errno %d", errno);
|
|
break;
|
|
}
|
|
ESP_LOGI(TAG, "Socket created, connecting to %s:%d", host_ip, PORT);
|
|
|
|
int err = connect(sock, (struct sockaddr *)&dest_addr, sizeof(dest_addr));
|
|
if (err != 0) {
|
|
ESP_LOGE(TAG, "Socket unable to connect: errno %d", errno);
|
|
break;
|
|
}
|
|
ESP_LOGI(TAG, "Successfully connected");
|
|
|
|
while (1) {
|
|
int err = send(sock, payload, strlen(payload), 0);
|
|
if (err < 0) {
|
|
ESP_LOGE(TAG, "Error occurred during sending: errno %d", errno);
|
|
break;
|
|
}
|
|
|
|
int len = recv(sock, rx_buffer, sizeof(rx_buffer) - 1, 0);
|
|
// Error occurred during receiving
|
|
if (len < 0) {
|
|
ESP_LOGE(TAG, "recv failed: errno %d", errno);
|
|
break;
|
|
}
|
|
// Data received
|
|
else {
|
|
rx_buffer[len] = 0; // Null-terminate whatever we received and treat like a string
|
|
ESP_LOGI(TAG, "Received %d bytes from %s:", len, host_ip);
|
|
ESP_LOGI(TAG, "%s", rx_buffer);
|
|
}
|
|
}
|
|
|
|
if (sock != -1) {
|
|
ESP_LOGE(TAG, "Shutting down socket and restarting...");
|
|
shutdown(sock, 0);
|
|
close(sock);
|
|
}
|
|
}
|
|
}
|