client.c

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

#define PORT 8080

int main(int argc, char const *argv[]) {
    int sock;
    struct sockaddr_in server_addr;

    if (argc != 2) {
        printf("Usage: %s <server_ip>\\n", argv[0]);
        return 1;
    }

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

    // Set up server address and port number
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(PORT);

    if (inet_pton(AF_INET, argv[1], &server_addr.sin_addr) <= 0) {
        fprintf(stderr, "Invalid address\\n");
        return 1;
    }

    // Connect to server
    if (connect(sock, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
        perror("Connection failed");
        exit(EXIT_FAILURE);
    }

    printf("Connected to %s:%d\\n", argv[1], PORT);

    close(sock);

    return 0;
}