#include <netdb.h>

#define MAXLEN 80

int client_write (int client_socket, char *s)

{

    return write (client_socket, s, strlen (s));

}

    char message[MAXLEN + 1];

    struct addrinfo hints, *result, *rp;

    memset (&hints, 0, sizeof (struct addrinfo));

    hints.ai_family = AF_UNSPEC;

    hints.ai_socktype = SOCK_STREAM;

    hints.ai_flags = 0;

    hints.ai_protocol = IPPROTO_TCP;

    if (getaddrinfo ("localhost", "4000", &hints, &result) != 0) {

        perror ("getaddrinfo");

        return -1;

    client_socket = -1;

    for (rp = result; rp != NULL; rp = rp->ai_next) {

        if ((client_socket = socket (rp->ai_family, rp->ai_socktype, rp->ai_protocol)) == -1)

            continue;

        if (connect (client_socket, rp->ai_addr, rp->ai_addrlen) != -1) {

            break;

        }

        close (client_socket);

        client_socket = -1;

    }

    if (result != NULL)

        freeaddrinfo (result);

    status = client_write (client_socket, "Hello\r\n");

        status = read (client_socket, message, MAXLEN);

            message[status] = '\0';