client.c

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <netdb.h>
#include <string.h>

extern int errno;

int port;

int main (int argc, char *argv[])
{
    int sd,ok=1;
    struct sockaddr_in server;
    char msg[10000];
    if (argc != 3)
    {
        printf ("Sintaxa: %s <adresa_server> <port>\n", argv[0]);
        return -1;
    }
    port = atoi (argv[2]);
    if ((sd = socket (AF_INET, SOCK_STREAM, 0)) == -1)
    {
        perror ("Eroare la socket().\n");
        return errno;
    }
    server.sin_family = AF_INET;
    server.sin_addr.s_addr = inet_addr(argv[1]);
    server.sin_port = htons (port);
    if (connect (sd, (struct sockaddr *) &server,sizeof (struct sockaddr)) == -1)
    {
        perror ("Eroare la connect().\n");
        return errno;
    }

    while(ok)
    {
        bzero (msg, 200);
        printf ("Introduceti o comanda: ");
        fflush (stdout);
        read (0, msg, 200);
        //printf("[%s]\n",msg);
        if(!strcmp(msg,"quit\n") || !strcmp(msg,"Quit\n") || !strcmp(msg,"quit") || !strcmp(msg,"Quit")) ok=0;
        if (write (sd, msg, 200) <= 0)
        {
            perror ("Eroare la write() spre server.\n");
            return errno;
        }

        if (read (sd, msg, 2500) < 0)
        {
            perror ("Eroare la read() de la server.\n");
            return errno;
        }
        printf ("Mesajul primit este:\n%s\n", msg);
        if(ok==0) close(sd);
    }
    close (sd);
}