sample_client.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define SERVER_IP "127.0.0.1"
#define PORT 8889
#define BUFFER_SIZE 1024

int main() {
    int client_socket;
    struct sockaddr_in server_addr;
    char buffer[BUFFER_SIZE];

    // Create socket
    if ((client_socket = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
        perror("Socket creation failed");
        exit(EXIT_FAILURE);
    }

    // Prepare server address structure
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);
    server_addr.sin_port = htons(PORT);

    // Connect to server
    if (connect(client_socket, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1) {
        perror("Connection failed");
        exit(EXIT_FAILURE);
    }

    printf("Connected to server\n");

    // Send data to server
    const char *message = "Hello, server!";
    send(client_socket, message, strlen(message), 0);

    // Receive response from server
    ssize_t bytes_received = recv(client_socket, buffer, BUFFER_SIZE, 0);
    if (bytes_received == -1) {
        perror("Receive error");
        close(client_socket);
        exit(EXIT_FAILURE);
    } else if (bytes_received == 0) {
        printf("Server closed connection\n");
        close(client_socket);
        exit(EXIT_SUCCESS);
    }

    // Process received data
    printf("Received response from server: %.*s\n", (int)bytes_received, buffer);

    // Close socket
    // close(client_socket);

    return 0;
}