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