#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
//======================================================================
int error( int ern, const char *err ){
	perror( err );
	return ern;
}
//======================================================================
int main( void )
{
	/* zmienne predefiniowane *****************************************/
	int  	port   = 12345;
	char 	host[] = "127.0.0.1";
	/* zmienne niezainicjowane ****************************************/
    int 	fd, n;
    struct 	sockaddr_in serv_addr;
    struct 	hostent *server;
    char 	buffer[256];

    /* tworzymy gniazdo ***********************************************/
    fd = socket(AF_INET, SOCK_STREAM, 0);

    if (fd < 0)
        return error( 1, "socket()");

	/* pobieramy informacje o serwerze ********************************/
    server = gethostbyname( host );

    if( server == NULL )
		return error( 2, "gethostbyname()" );

    /* zapelniamy strukture zerami (inicjujemy) ***********************/
    bzero((char *) &serv_addr, sizeof(serv_addr));

    /* przypisujemy parametry *****************************************/
    serv_addr.sin_family = AF_INET;			// typ gniazda
    serv_addr.sin_port = htons(port);		// port

    bcopy( (char *) server->h_addr, (char *) &serv_addr.sin_addr.s_addr, server->h_length );

    /* nawiazujemy polaczenie *****************************************/
    if( connect( fd, (struct sockaddr *) &serv_addr, sizeof( serv_addr ) ) < 0 )
        return error( 3, "connect()" );

	/* zerujemy bufor *************************************************/
    bzero( buffer, 256 );

    /* odczytujemy wiadomosc ******************************************/
    n = read( fd, buffer, 255 );
    if (n < 0)
         return error( 4, "read()" );

	/* wypisujemy wiadomosc *******************************************/
    printf( "%s\n", buffer );

    /* konczymy polaczenie ********************************************/
    close(fd);

    //------------------------------------------------------------------
    return 0;
}
//======================================================================