Conference irocz::terminal_servers

3460.0. "problem with rapidprint200" by MLNCSC::VOCI () Mon Mar 10 1997 12:47

Hello,
    
    I finaly managed to have a RapidPrint 200 and I've done some testings.
    It doesn't work.
    
    I configured I printer on the parallel port, I run the customer program
    that opens the socket and send the data and with the printer on
    everything works fine, it work fine also if the printer is off-line,
    but it fails if the printer is off. Following you'll find all the
    details.
    
    Unix 4.0
    RapidPrint 200 ROM 1.17
    DecWrite 95
    
    nicprint.conf
    
    #Description                    Parameter
    #_________________________________________
     Internet-Address               16.192.16.162
     Netmask                        255.255.255.0
     Forwarding                     N
     Base-Port-Number               10000
     Keepalive                      Y
     Max-Transmission-Unit          1500
     Broadcast                      0
     SNMP-System-Description        Network printer
     SNMP-System-ID                 1.3.6.1.4.1.24
     Ethernet                       Y
     Default-Router-IP              16.192.16.116
     Serial-Direction               OUT
     Serial-Baud-Rate               19200
     Serial-Data-Bits               8
     Serial-Stop-Bits-Fixed         1
     Serial-Parity                  None
     Serial-DTR/DSR                 Enabled
     Serial-XOn/XOff                Enabled
     Novell-Protocol                Y
     Apple-Protocol                 Y
     Banners-ON/OFF                 OFF
     Parallel-port1-data-format     ASCII
     Serial-port2-data-format       ASCII
     Parallel-port-data-format      UNUSED
     Parallel-port-data-format      UNUSED
     LAT-Protocol                   Y
     Powerup-Status-Page            ON
    #             
    
    In the next reply you'll find the c program.
    
    Log:
    
    ------> printer on-line
    
    OPALE:gea:/usr/users/gea/linguaggi/c> ./sockprint rapidp
    IP address 0x10c010a2
    Send on socket 3 the message prova di stampa tramite printer server
    PRINTER DEC 200 
     of lenght 57 bytes
    Sended request return value 0
    
    ------> printer off-line
    
    OPALE:gea:/usr/users/gea/linguaggi/c> ./sockprint rapidp
    IP address 0x10c010a2
    Timeout
    Connection refused, retry !!!
    Connection refused, retry !!!
    Connection refused, retry !!!
    Connection refused, retry !!!
    Connection refused, retry !!!
    Connection refused, retry !!!
    Connection refused, retry !!!
    Connection refused, retry !!!
    Connection refused, retry !!!
    Connection refused
    
    ------> printer turned off
    
    OPALE:gea:/usr/users/gea/linguaggi/c> ./sockprint rapidp
    IP address 0x10c010a2
    Send on socket 3 the message prova di stampa tramite printer server
    PRINTER DEC 200 
     of lenght 57 bytes
    Sended request return value 0
    
    THIS IS THE PROBLEM !
    
    On the parallel port there should be no concern about signaling like
    data set ready or similar.
    
    Any idea is wellcome since this problem is critical for the customer,
    the allert messages of his applications are printed and he would like
    to have notifications when the printer is off.
    
    Thanks again,
    Gea
================================================================================
Note 3439.3                problem with RapidPrint 200                    3 of 3
MLNCSC::VOCI                                        118 lines   7-MAR-1997 11:39
                                 -< c program >-
--------------------------------------------------------------------------------
/* compilazione: cc prova.c -o prova */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <signal.h>

#include "recognize.h"

char	*hostname;
char	outdata[50];

int	sock;

/* argomento nome del printer server collegato in rete */

main(argc, argv)
int argc;
char **argv;
{
struct	servent		*sp;
struct	sockaddr_in	server;
struct	hostent		*hp, *gethostbyname();

unsigned	int	ip_addr;

int	ok, loops, str_len;
char	ack;

	hostname = argv[1];

	hp = gethostbyname(hostname);
	if (hp ==0){
		(void) fprintf(stderr,"%s: unknown host\n", hostname);
		exit(errno);
	}

	ip_addr = *(int*) hp-> h_addr;
	(void) fprintf(stderr,"IP address 0x%x\n", htonl(ip_addr));

	memset((char *)&server, 0, sizeof(server));
	server.sin_family 	= AF_INET;
	server.sin_port 	= htons(10001);
	server.sin_addr.s_addr 	= ip_addr;

	ok = 0;
	loops = 0;

	do{
		sock = socket(AF_INET, SOCK_STREAM, 0);
		if (sock < 0){
			(void) fprintf(stderr,"Error creating socket\n");
			exit(errno);
		}
		
		if (connect(sock, (struct sockaddr *) & server, sizeof server) < 0){
			loops++;

			if (errno == ECONNREFUSED){
				(void) fprintf(stderr,"Connection refused, retry !!!\n");
				close(sock);
				sleep(5);
			}else{
				if (errno == ETIMEDOUT){
					(void) fprintf(stderr,"Timeout\n");
					close(sock);
				}else{
					(void) fprintf(stderr,"Unable to contact lpd daemon %d\n", errno);
					exit(errno);
				}
			}
		}else{
			ok++;
		}
	}while (!ok && loops < 10);

	if (!ok){
		(void) fprintf(stderr,"Connection refused\n");
		exit(errno);
	}

	strcpy(&outdata[0], "prova di stampa tramite printer server PRINTER DEC 200 \r\n");
	str_len = strlen(outdata);

	fprintf(stderr,"Send on socket %d the message %s of lenght %d bytes\n", sock, outdata, str_len);
	if (ok = send((int)sock, outdata, (unsigned)str_len, 0) < 0)
	{
		(void) fprintf(stderr, "Error writing header to socket\n");
		close(sock);
		exit(errno);
	}

	(void) fprintf(stderr, "Sended request return value %d\n", ok);

#ifdef COMPILE
	if (read(sock, &ack, sizeof(ack)) < 0)
	{
		(void) fprintf(stderr, "Error reading answer from socket\n");
		close(sock);
		exit(errno);
	}

	(void) fprintf(stderr,"Receive from socket %d the message %s\n", sock, ack);
	if(atoi(ack) == 0)
		(void) fprintf(stderr,"Error on server end\n");

	if(atoi(ack) == 1)
		(void) fprintf(stderr,"Successfully\n");
	else
		(void) fprintf(stderr,"Error reading acknowledgment from server\n");
#endif
	/* finche' non si chiude la connessione non effettua la stampa, PROBLEMA !!!! */
	close(sock);
}

This problem is already discussed in note 3439...  please post replies to
that note.