[thirdparty/cups.git] / backend / socket.c

/*
 * AppSocket backend for CUPS.
 *
 * Copyright 2007-2018 by Apple Inc.
 * Copyright 1997-2007 by Easy Software Products, all rights reserved.
 *
 * These coded instructions, statements, and computer programs are the
 * property of Apple Inc. and are protected by Federal copyright
 * law.  Distribution and use rights are outlined in the file "LICENSE.txt"
 * "LICENSE" which should have been included with this file.  If this
 * file is missing or damaged, see the license at "http://www.cups.org/".
 *
 * This file is subject to the Apple OS-Developed Software exception.
 */

/*
 * Include necessary headers.
 */

#include <cups/http-private.h>
#include "backend-private.h"
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>

#ifdef _WIN32
#  include <winsock.h>
#else
#  include <unistd.h>
#  include <fcntl.h>
#  include <sys/socket.h>
#  include <netinet/in.h>
#  include <arpa/inet.h>
#  include <netdb.h>
#endif /* _WIN32 */


/*
 * Local functions...
 */

static ssize_t	wait_bc(int device_fd, int secs);


/*
 * 'main()' - Send a file to the printer or server.
 *
 * Usage:
 *
 *    printer-uri job-id user title copies options [file]
 */

int					/* O - Exit status */
main(int  argc,				/* I - Number of command-line arguments (6 or 7) */
     char *argv[])			/* I - Command-line arguments */
{
  const char	*device_uri;		/* Device URI */
  char		scheme[255],		/* Scheme in URI */
		hostname[1024],		/* Hostname */
		username[255],		/* Username info (not used) */
		resource[1024],		/* Resource info (not used) */
		*options,		/* Pointer to options */
		*name,			/* Name of option */
		*value,			/* Value of option */
		sep;			/* Option separator */
  int		print_fd;		/* Print file */
  int		copies;			/* Number of copies to print */
  time_t	start_time;		/* Time of first connect */
  int		contimeout;		/* Connection timeout */
  int		waiteof;		/* Wait for end-of-file? */
  int		port;			/* Port number */
  int		delay;			/* Delay for retries... */
  int		device_fd;		/* AppSocket */
  int		error;			/* Error code (if any) */
  http_addrlist_t *addrlist,		/* Address list */
		*addr;			/* Connected address */
  char		addrname[256];		/* Address name */
  int		snmp_enabled = 1;	/* Is SNMP enabled? */
  int		snmp_fd,		/* SNMP socket */
		start_count,		/* Page count via SNMP at start */
		page_count,		/* Page count via SNMP */
		have_supplies;		/* Printer supports supply levels? */
  ssize_t	bytes = 0,		/* Initial bytes read */
		tbytes;			/* Total number of bytes written */
  char		buffer[1024];		/* Initial print buffer */
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
  struct sigaction action;		/* Actions for POSIX signals */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET */


 /*
  * Make sure status messages are not buffered...
  */

  setbuf(stderr, NULL);

 /*
  * Ignore SIGPIPE signals...
  */

#ifdef HAVE_SIGSET
  sigset(SIGPIPE, SIG_IGN);
#elif defined(HAVE_SIGACTION)
  memset(&action, 0, sizeof(action));
  action.sa_handler = SIG_IGN;
  sigaction(SIGPIPE, &action, NULL);
#else
  signal(SIGPIPE, SIG_IGN);
#endif /* HAVE_SIGSET */

 /*
  * Check command-line...
  */

  if (argc == 1)
  {
    printf("network socket \"Unknown\" \"%s\"\n",
           _cupsLangString(cupsLangDefault(), _("AppSocket/HP JetDirect")));
    return (CUPS_BACKEND_OK);
  }
  else if (argc < 6 || argc > 7)
  {
    _cupsLangPrintf(stderr,
                    _("Usage: %s job-id user title copies options [file]"),
                    argv[0]);
    return (CUPS_BACKEND_FAILED);
  }

 /*
  * If we have 7 arguments, print the file named on the command-line.
  * Otherwise, send stdin instead...
  */

  if (argc == 6)
  {
    print_fd = 0;
    copies   = 1;
  }
  else
  {
   /*
    * Try to open the print file...
    */

    if ((print_fd = open(argv[6], O_RDONLY)) < 0)
    {
      _cupsLangPrintError("ERROR", _("Unable to open print file"));
      return (CUPS_BACKEND_FAILED);
    }

    copies = atoi(argv[4]);
  }

 /*
  * Extract the hostname and port number from the URI...
  */

  while ((device_uri = cupsBackendDeviceURI(argv)) == NULL)
  {
    _cupsLangPrintFilter(stderr, "INFO", _("Unable to locate printer."));
    sleep(10);

    if (getenv("CLASS") != NULL)
      return (CUPS_BACKEND_FAILED);
  }

  httpSeparateURI(HTTP_URI_CODING_ALL, device_uri, scheme, sizeof(scheme),
                  username, sizeof(username), hostname, sizeof(hostname), &port,
		  resource, sizeof(resource));

  if (port == 0)
    port = 9100;	/* Default to HP JetDirect/Tektronix PhaserShare */

 /*
  * Get options, if any...
  */

  waiteof    = 1;
  contimeout = 7 * 24 * 60 * 60;

  if ((options = strchr(resource, '?')) != NULL)
  {
   /*
    * Yup, terminate the device name string and move to the first
    * character of the options...
    */

    *options++ = '\0';

   /*
    * Parse options...
    */

    while (*options)
    {
     /*
      * Get the name...
      */

      name = options;

      while (*options && *options != '=' && *options != '+' && *options != '&')
        options ++;

      if ((sep = *options) != '\0')
        *options++ = '\0';

      if (sep == '=')
      {
       /*
        * Get the value...
	*/

        value = options;

	while (*options && *options != '+' && *options != '&')
	  options ++;

        if (*options)
	  *options++ = '\0';
      }
      else
        value = (char *)"";

     /*
      * Process the option...
      */

      if (!_cups_strcasecmp(name, "waiteof"))
      {
       /*
        * Set the wait-for-eof value...
	*/

        waiteof = !value[0] || !_cups_strcasecmp(value, "on") ||
		  !_cups_strcasecmp(value, "yes") || !_cups_strcasecmp(value, "true");
      }
      else if (!_cups_strcasecmp(name, "snmp"))
      {
        /*
         * Enable/disable SNMP stuff...
         */

         snmp_enabled = !value[0] || !_cups_strcasecmp(value, "on") ||
                        !_cups_strcasecmp(value, "yes") ||
                        !_cups_strcasecmp(value, "true");
      }
      else if (!_cups_strcasecmp(name, "contimeout"))
      {
       /*
        * Set the connection timeout...
	*/

	if (atoi(value) > 0)
	  contimeout = atoi(value);
      }
    }
  }

 /*
  * Then try finding the remote host...
  */

  start_time = time(NULL);

  addrlist = backendLookup(hostname, port, NULL);

 /*
  * See if the printer supports SNMP...
  */

  if (snmp_enabled)
    snmp_fd = _cupsSNMPOpen(addrlist->addr.addr.sa_family);
  else
    snmp_fd = -1;

  if (snmp_fd >= 0)
    have_supplies = !backendSNMPSupplies(snmp_fd, &(addrlist->addr),
                                         &start_count, NULL);
  else
    have_supplies = start_count = 0;

 /*
  * Wait for data from the filter...
  */

  if (print_fd == 0)
  {
    if (!backendWaitLoop(snmp_fd, &(addrlist->addr), 1, backendNetworkSideCB))
      return (CUPS_BACKEND_OK);
    else if ((bytes = read(0, buffer, sizeof(buffer))) <= 0)
      return (CUPS_BACKEND_OK);
  }

 /*
  * Connect to the printer...
  */

  fprintf(stderr, "DEBUG: Connecting to %s:%d\n", hostname, port);
  _cupsLangPrintFilter(stderr, "INFO", _("Connecting to printer."));

  for (delay = 5;;)
  {
    if ((addr = httpAddrConnect(addrlist, &device_fd)) == NULL)
    {
      error     = errno;
      device_fd = -1;

      if (getenv("CLASS") != NULL)
      {
       /*
        * If the CLASS environment variable is set, the job was submitted
	* to a class and not to a specific queue.  In this case, we want
	* to abort immediately so that the job can be requeued on the next
	* available printer in the class.
	*/

        _cupsLangPrintFilter(stderr, "INFO",
			     _("Unable to contact printer, queuing on next "
			       "printer in class."));

       /*
        * Sleep 5 seconds to keep the job from requeuing too rapidly...
	*/

	sleep(5);

        return (CUPS_BACKEND_FAILED);
      }

      fprintf(stderr, "DEBUG: Connection error: %s\n", strerror(error));

      if (errno == ECONNREFUSED || errno == EHOSTDOWN || errno == EHOSTUNREACH || errno == ETIMEDOUT || errno == ENOTCONN)
      {
        if (contimeout && (time(NULL) - start_time) > contimeout)
	{
	  _cupsLangPrintFilter(stderr, "ERROR",
	                       _("The printer is not responding."));
	  return (CUPS_BACKEND_FAILED);
	}

	switch (error)
	{
	  case EHOSTDOWN :
	      _cupsLangPrintFilter(stderr, "WARNING",
				   _("The printer may not exist or "
				     "is unavailable at this time."));
	      break;

	  case EHOSTUNREACH :
	  default :
	      _cupsLangPrintFilter(stderr, "WARNING",
				   _("The printer is unreachable at this "
				     "time."));
	      break;

	  case ECONNREFUSED :
	      _cupsLangPrintFilter(stderr, "WARNING",
	                           _("The printer is in use."));
	      break;
        }

	sleep((unsigned)delay);

	if (delay < 30)
	  delay += 5;
      }
      else
      {
	_cupsLangPrintFilter(stderr, "ERROR",
	                     _("The printer is not responding."));
	sleep(30);
      }
    }
    else
      break;
  }

  fputs("STATE: -connecting-to-device\n", stderr);
  _cupsLangPrintFilter(stderr, "INFO", _("Connected to printer."));

  fprintf(stderr, "DEBUG: Connected to %s:%d...\n",
	  httpAddrString(&(addr->addr), addrname, sizeof(addrname)),
	  httpAddrPort(&(addr->addr)));

 /*
  * Print everything...
  */

  tbytes = 0;

  if (bytes > 0)
    tbytes += write(device_fd, buffer, (size_t)bytes);

  while (copies > 0 && tbytes >= 0)
  {
    copies --;

    if (print_fd != 0)
    {
      fputs("PAGE: 1 1\n", stderr);
      lseek(print_fd, 0, SEEK_SET);
    }

    if ((bytes = backendRunLoop(print_fd, device_fd, snmp_fd, &(addrlist->addr), 1, 0, backendNetworkSideCB)) < 0)
      tbytes = -1;
    else
      tbytes = bytes;

    if (print_fd != 0 && tbytes >= 0)
      _cupsLangPrintFilter(stderr, "INFO", _("Print file sent."));
  }

  fputs("STATE: +cups-waiting-for-job-completed\n", stderr);

  if (waiteof && tbytes >= 0)
  {
   /*
    * Shutdown the socket and wait for the other end to finish...
    */

    _cupsLangPrintFilter(stderr, "INFO", _("Waiting for printer to finish."));

    shutdown(device_fd, 1);

    while (wait_bc(device_fd, 90) > 0);
  }

 /*
  * Collect the final page count as needed...
  */

  if (have_supplies &&
      !backendSNMPSupplies(snmp_fd, &(addrlist->addr), &page_count, NULL) &&
      page_count > start_count)
    fprintf(stderr, "PAGE: total %d\n", page_count - start_count);

 /*
  * Close the socket connection...
  */

  close(device_fd);

  httpAddrFreeList(addrlist);

 /*
  * Close the input file and return...
  */

  if (print_fd != 0)
    close(print_fd);

  return (tbytes >= 0 ? CUPS_BACKEND_OK : CUPS_BACKEND_FAILED);
}


/*
 * 'wait_bc()' - Wait for back-channel data...
 */

static ssize_t				/* O - # bytes read or -1 on error */
wait_bc(int device_fd,			/* I - Socket */
        int secs)			/* I - Seconds to wait */
{
  struct timeval timeout;		/* Timeout for select() */
  fd_set	input;			/* Input set for select() */
  ssize_t	bytes;			/* Number of back-channel bytes read */
  char		buffer[1024];		/* Back-channel buffer */


 /*
  * Wait up to "secs" seconds for backchannel data...
  */

  timeout.tv_sec  = secs;
  timeout.tv_usec = 0;

  FD_ZERO(&input);
  FD_SET(device_fd, &input);

  if (select(device_fd + 1, &input, NULL, NULL, &timeout) > 0)
  {
   /*
    * Grab the data coming back and spit it out to stderr...
    */

    if ((bytes = read(device_fd, buffer, sizeof(buffer))) > 0)
    {
      fprintf(stderr, "DEBUG: Received %d bytes of back-channel data\n",
	      (int)bytes);
      cupsBackChannelWrite(buffer, (size_t)bytes, 1.0);
    }

    return (bytes);
  }
  else
    return (-1);
}
Commit	Line	Data
ef416fc2	1	/*
581dae2d	2	* AppSocket backend for CUPS.
ef416fc2	3	*
e7e33bf6	4	* Copyright 2007-2018 by Apple Inc.
581dae2d	5	* Copyright 1997-2007 by Easy Software Products, all rights reserved.
ef416fc2	6	*
581dae2d MS	7	* These coded instructions, statements, and computer programs are the
	8	* property of Apple Inc. and are protected by Federal copyright
	9	* law. Distribution and use rights are outlined in the file "LICENSE.txt"
	10	* "LICENSE" which should have been included with this file. If this
	11	* file is missing or damaged, see the license at "http://www.cups.org/".
ef416fc2	12	*
581dae2d	13	* This file is subject to the Apple OS-Developed Software exception.
ef416fc2	14	*/
	15
	16	/*
	17	* Include necessary headers.
	18	*/
	19
ef416fc2	20	#include <cups/http-private.h>
ed486911	21	#include "backend-private.h"
ef416fc2	22	#include <stdarg.h>
ef416fc2	23	#include <sys/types.h>
ef416fc2	24	#include <sys/stat.h>
ef416fc2	25
0313a59e	26	#ifdef _WIN32
ef416fc2	27	# include <winsock.h>
	28	#else
	29	# include <unistd.h>
	30	# include <fcntl.h>
	31	# include <sys/socket.h>
	32	# include <netinet/in.h>
	33	# include <arpa/inet.h>
	34	# include <netdb.h>
0313a59e	35	#endif /* _WIN32 */
ef416fc2	36
ef416fc2	37
f7deaa1a	38	/*
	39	* Local functions...
	40	*/
	41
7e86f2f6	42	static ssize_t wait_bc(int device_fd, int secs);
f7deaa1a	43
f7deaa1a	44
ef416fc2	45	/*
	46	* 'main()' - Send a file to the printer or server.
	47	*
	48	* Usage:
	49	*
	50	* printer-uri job-id user title copies options [file]
	51	*/
	52
	53	int /* O - Exit status */
	54	main(int argc, /* I - Number of command-line arguments (6 or 7) */
	55	char argv[]) / I - Command-line arguments */
	56	{
1f0275e3	57	const char device_uri; / Device URI */
acb056cb	58	char scheme[255], /* Scheme in URI */
ef416fc2	59	hostname[1024], /* Hostname */
ef416fc2	60	username[255], /* Username info (not used) */
fa73b229	61	resource[1024], /* Resource info (not used) */
fa73b229	62	options, / Pointer to options */
db1f069b MS	63	name, / Name of option */
	64	value, / Value of option */
	65	sep; /* Option separator */
ed486911	66	int print_fd; /* Print file */
ef416fc2	67	int copies; /* Number of copies to print */
f8b3a85b	68	time_t start_time; /* Time of first connect */
c0e1af83	69	int contimeout; /* Connection timeout */
fa73b229	70	int waiteof; /* Wait for end-of-file? */
ef416fc2	71	int port; /* Port number */
ef416fc2	72	int delay; /* Delay for retries... */
ed486911	73	int device_fd; /* AppSocket */
ef416fc2	74	int error; /* Error code (if any) */
26d47ec6	75	http_addrlist_t addrlist, / Address list */
db1f069b	76	addr; / Connected address */
26d47ec6	77	char addrname[256]; /* Address name */
5a9febac	78	int snmp_enabled = 1; /* Is SNMP enabled? */
568fa3fa MS	79	int snmp_fd, /* SNMP socket */
568fa3fa MS	80	start_count, /* Page count via SNMP at start */
426c6a59 MS	81	page_count, /* Page count via SNMP */
426c6a59 MS	82	have_supplies; /* Printer supports supply levels? */
eac3a0a0 MS	83	ssize_t bytes = 0, /* Initial bytes read */
	84	tbytes; /* Total number of bytes written */
	85	char buffer[1024]; /* Initial print buffer */
ef416fc2	86	#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
	87	struct sigaction action; /* Actions for POSIX signals */
	88	#endif /* HAVE_SIGACTION && !HAVE_SIGSET */
	89
	90
	91	/*
	92	* Make sure status messages are not buffered...
	93	*/
	94
	95	setbuf(stderr, NULL);
	96
	97	/*
	98	* Ignore SIGPIPE signals...
	99	*/
	100
	101	#ifdef HAVE_SIGSET
	102	sigset(SIGPIPE, SIG_IGN);
	103	#elif defined(HAVE_SIGACTION)
	104	memset(&action, 0, sizeof(action));
	105	action.sa_handler = SIG_IGN;
	106	sigaction(SIGPIPE, &action, NULL);
	107	#else
	108	signal(SIGPIPE, SIG_IGN);
	109	#endif /* HAVE_SIGSET */
	110
	111	/*
	112	* Check command-line...
	113	*/
	114
	115	if (argc == 1)
	116	{
8b450588 MS	117	printf("network socket \"Unknown\" \"%s\"\n",
8b450588 MS	118	_cupsLangString(cupsLangDefault(), _("AppSocket/HP JetDirect")));
ef416fc2	119	return (CUPS_BACKEND_OK);
	120	}
	121	else if (argc < 6 \|\| argc > 7)
	122	{
db1f069b	123	_cupsLangPrintf(stderr,
0837b7e8	124	_("Usage: %s job-id user title copies options [file]"),
db1f069b	125	argv[0]);
ef416fc2	126	return (CUPS_BACKEND_FAILED);
	127	}
	128
	129	/*
	130	* If we have 7 arguments, print the file named on the command-line.
	131	* Otherwise, send stdin instead...
	132	*/
	133
	134	if (argc == 6)
	135	{
ed486911	136	print_fd = 0;
ed486911	137	copies = 1;
ef416fc2	138	}
	139	else
	140	{
	141	/*
	142	* Try to open the print file...
	143	*/
	144
ed486911	145	if ((print_fd = open(argv[6], O_RDONLY)) < 0)
ef416fc2	146	{
0837b7e8	147	_cupsLangPrintError("ERROR", _("Unable to open print file"));
ef416fc2	148	return (CUPS_BACKEND_FAILED);
	149	}
	150
	151	copies = atoi(argv[4]);
	152	}
	153
	154	/*
	155	* Extract the hostname and port number from the URI...
	156	*/
	157
0268488e MS	158	while ((device_uri = cupsBackendDeviceURI(argv)) == NULL)
	159	{
	160	_cupsLangPrintFilter(stderr, "INFO", _("Unable to locate printer."));
	161	sleep(10);
	162
	163	if (getenv("CLASS") != NULL)
	164	return (CUPS_BACKEND_FAILED);
	165	}
1f0275e3	166
acb056cb MS	167	httpSeparateURI(HTTP_URI_CODING_ALL, device_uri, scheme, sizeof(scheme),
acb056cb MS	168	username, sizeof(username), hostname, sizeof(hostname), &port,
ef416fc2	169	resource, sizeof(resource));
	170
	171	if (port == 0)
	172	port = 9100; /* Default to HP JetDirect/Tektronix PhaserShare */
	173
fa73b229	174	/*
	175	* Get options, if any...
	176	*/
	177
c0e1af83	178	waiteof = 1;
c0e1af83	179	contimeout = 7 * 24 * 60 * 60;
fa73b229	180
	181	if ((options = strchr(resource, '?')) != NULL)
	182	{
	183	/*
	184	* Yup, terminate the device name string and move to the first
	185	* character of the options...
	186	*/
	187
	188	*options++ = '\0';
	189
	190	/*
	191	* Parse options...
	192	*/
	193
	194	while (*options)
	195	{
	196	/*
	197	* Get the name...
	198	*/
	199
db1f069b	200	name = options;
fa73b229	201
db1f069b MS	202	while (options && options != '=' && options != '+' && options != '&')
	203	options ++;
	204
	205	if ((sep = *options) != '\0')
	206	*options++ = '\0';
	207
	208	if (sep == '=')
fa73b229	209	{
	210	/*
	211	* Get the value...
	212	*/
	213
db1f069b	214	value = options;
fa73b229	215
db1f069b	216	while (options && options != '+' && *options != '&')
fa73b229	217	options ++;
db1f069b MS	218
	219	if (*options)
	220	*options++ = '\0';
fa73b229	221	}
fa73b229	222	else
db1f069b	223	value = (char *)"";
fa73b229	224
	225	/*
	226	* Process the option...
	227	*/
	228
88f9aafc	229	if (!_cups_strcasecmp(name, "waiteof"))
fa73b229	230	{
	231	/*
	232	* Set the wait-for-eof value...
	233	*/
	234
88f9aafc MS	235	waiteof = !value[0] \|\| !_cups_strcasecmp(value, "on") \|\|
88f9aafc MS	236	!_cups_strcasecmp(value, "yes") \|\| !_cups_strcasecmp(value, "true");
fa73b229	237	}
5a9febac MS	238	else if (!_cups_strcasecmp(name, "snmp"))
	239	{
	240	/*
	241	* Enable/disable SNMP stuff...
	242	*/
	243
	244	snmp_enabled = !value[0] \|\| !_cups_strcasecmp(value, "on") \|\|
5a582409 MS	245	!_cups_strcasecmp(value, "yes") \|\|
5a582409 MS	246	!_cups_strcasecmp(value, "true");
5a9febac	247	}
88f9aafc	248	else if (!_cups_strcasecmp(name, "contimeout"))
c0e1af83	249	{
	250	/*
	251	* Set the connection timeout...
	252	*/
	253
	254	if (atoi(value) > 0)
	255	contimeout = atoi(value);
	256	}
fa73b229	257	}
	258	}
	259
ef416fc2	260	/*
c8fef167	261	* Then try finding the remote host...
ef416fc2	262	*/
ef416fc2	263
4d301e69	264	start_time = time(NULL);
c0e1af83	265
f5cffc18	266	addrlist = backendLookup(hostname, port, NULL);
c8fef167 MS	267
	268	/*
	269	* See if the printer supports SNMP...
	270	*/
	271
5a9febac MS	272	if (snmp_enabled)
	273	snmp_fd = _cupsSNMPOpen(addrlist->addr.addr.sa_family);
	274	else
	275	snmp_fd = -1;
	276
	277	if (snmp_fd >= 0)
f14324a7 MS	278	have_supplies = !backendSNMPSupplies(snmp_fd, &(addrlist->addr),
f14324a7 MS	279	&start_count, NULL);
c8fef167 MS	280	else
	281	have_supplies = start_count = 0;
	282
	283	/*
	284	* Wait for data from the filter...
	285	*/
	286
	287	if (print_fd == 0)
eac3a0a0	288	{
f14324a7	289	if (!backendWaitLoop(snmp_fd, &(addrlist->addr), 1, backendNetworkSideCB))
c8fef167	290	return (CUPS_BACKEND_OK);
eac3a0a0 MS	291	else if ((bytes = read(0, buffer, sizeof(buffer))) <= 0)
	292	return (CUPS_BACKEND_OK);
	293	}
c8fef167 MS	294
	295	/*
	296	* Connect to the printer...
	297	*/
ef416fc2	298
acb056cb	299	fprintf(stderr, "DEBUG: Connecting to %s:%d\n", hostname, port);
0837b7e8	300	_cupsLangPrintFilter(stderr, "INFO", _("Connecting to printer."));
ef416fc2	301
ed486911	302	for (delay = 5;;)
ef416fc2	303	{
26d47ec6	304	if ((addr = httpAddrConnect(addrlist, &device_fd)) == NULL)
ef416fc2	305	{
ed486911	306	error = errno;
ed486911	307	device_fd = -1;
ef416fc2	308
ed486911	309	if (getenv("CLASS") != NULL)
	310	{
	311	/*
	312	* If the CLASS environment variable is set, the job was submitted
	313	* to a class and not to a specific queue. In this case, we want
	314	* to abort immediately so that the job can be requeued on the next
	315	* available printer in the class.
	316	*/
ef416fc2	317
0837b7e8 MS	318	_cupsLangPrintFilter(stderr, "INFO",
	319	_("Unable to contact printer, queuing on next "
	320	"printer in class."));
ef416fc2	321
ed486911	322	/*
	323	* Sleep 5 seconds to keep the job from requeuing too rapidly...
	324	*/
ef416fc2	325
ed486911	326	sleep(5);
ef416fc2	327
ed486911	328	return (CUPS_BACKEND_FAILED);
ed486911	329	}
ef416fc2	330
c7017ecc MS	331	fprintf(stderr, "DEBUG: Connection error: %s\n", strerror(error));
c7017ecc MS	332
4cf66fef	333	if (errno == ECONNREFUSED \|\| errno == EHOSTDOWN \|\| errno == EHOSTUNREACH \|\| errno == ETIMEDOUT \|\| errno == ENOTCONN)
ed486911	334	{
c0e1af83	335	if (contimeout && (time(NULL) - start_time) > contimeout)
c0e1af83	336	{
0837b7e8 MS	337	_cupsLangPrintFilter(stderr, "ERROR",
0837b7e8 MS	338	_("The printer is not responding."));
c0e1af83	339	return (CUPS_BACKEND_FAILED);
	340	}
	341
c7017ecc MS	342	switch (error)
	343	{
	344	case EHOSTDOWN :
0837b7e8	345	_cupsLangPrintFilter(stderr, "WARNING",
22c9029b MS	346	_("The printer may not exist or "
22c9029b MS	347	"is unavailable at this time."));
c7017ecc MS	348	break;
	349
	350	case EHOSTUNREACH :
4cf66fef	351	default :
0837b7e8	352	_cupsLangPrintFilter(stderr, "WARNING",
22c9029b MS	353	_("The printer is unreachable at this "
22c9029b MS	354	"time."));
c7017ecc MS	355	break;
	356
	357	case ECONNREFUSED :
0837b7e8	358	_cupsLangPrintFilter(stderr, "WARNING",
f3c17241	359	_("The printer is in use."));
c7017ecc MS	360	break;
c7017ecc MS	361	}
c0e1af83	362
7e86f2f6	363	sleep((unsigned)delay);
ef416fc2	364
ed486911	365	if (delay < 30)
ed486911	366	delay += 5;
ef416fc2	367	}
ef416fc2	368	else
ed486911	369	{
0837b7e8	370	_cupsLangPrintFilter(stderr, "ERROR",
22c9029b	371	_("The printer is not responding."));
ed486911	372	sleep(30);
ed486911	373	}
ef416fc2	374	}
ed486911	375	else
	376	break;
	377	}
ef416fc2	378
ed486911	379	fputs("STATE: -connecting-to-device\n", stderr);
0837b7e8	380	_cupsLangPrintFilter(stderr, "INFO", _("Connected to printer."));
26d47ec6	381
22c9029b MS	382	fprintf(stderr, "DEBUG: Connected to %s:%d...\n",
22c9029b MS	383	httpAddrString(&(addr->addr), addrname, sizeof(addrname)),
a469f8a5	384	httpAddrPort(&(addr->addr)));
ef416fc2	385
ed486911	386	/*
	387	* Print everything...
	388	*/
ef416fc2	389
ed486911	390	tbytes = 0;
ef416fc2	391
eac3a0a0	392	if (bytes > 0)
7e86f2f6	393	tbytes += write(device_fd, buffer, (size_t)bytes);
eac3a0a0	394
ed486911	395	while (copies > 0 && tbytes >= 0)
ed486911	396	{
ef416fc2	397	copies --;
ef416fc2	398
ed486911	399	if (print_fd != 0)
ef416fc2	400	{
ef416fc2	401	fputs("PAGE: 1 1\n", stderr);
ed486911	402	lseek(print_fd, 0, SEEK_SET);
ef416fc2	403	}
ef416fc2	404
e7e33bf6 MS	405	if ((bytes = backendRunLoop(print_fd, device_fd, snmp_fd, &(addrlist->addr), 1, 0, backendNetworkSideCB)) < 0)
	406	tbytes = -1;
	407	else
	408	tbytes = bytes;
ef416fc2	409
ed486911	410	if (print_fd != 0 && tbytes >= 0)
0837b7e8	411	_cupsLangPrintFilter(stderr, "INFO", _("Print file sent."));
ed486911	412	}
ef416fc2	413
1e3e80bb	414	fputs("STATE: +cups-waiting-for-job-completed\n", stderr);
581dae2d	415
e7e33bf6	416	if (waiteof && tbytes >= 0)
ed486911	417	{
	418	/*
	419	* Shutdown the socket and wait for the other end to finish...
	420	*/
ef416fc2	421
0837b7e8	422	_cupsLangPrintFilter(stderr, "INFO", _("Waiting for printer to finish."));
ef416fc2	423
ed486911	424	shutdown(device_fd, 1);
ef416fc2	425
323c5de1	426	while (wait_bc(device_fd, 90) > 0);
ed486911	427	}
ef416fc2	428
568fa3fa MS	429	/*
	430	* Collect the final page count as needed...
	431	*/
	432
f14324a7 MS	433	if (have_supplies &&
f14324a7 MS	434	!backendSNMPSupplies(snmp_fd, &(addrlist->addr), &page_count, NULL) &&
568fa3fa MS	435	page_count > start_count)
	436	fprintf(stderr, "PAGE: total %d\n", page_count - start_count);
	437
ed486911	438	/*
	439	* Close the socket connection...
	440	*/
ef416fc2	441
ed486911	442	close(device_fd);
ef416fc2	443
	444	httpAddrFreeList(addrlist);
	445
	446	/*
	447	* Close the input file and return...
	448	*/
	449
ed486911	450	if (print_fd != 0)
ed486911	451	close(print_fd);
ef416fc2	452
e7e33bf6	453	return (tbytes >= 0 ? CUPS_BACKEND_OK : CUPS_BACKEND_FAILED);
ef416fc2	454	}
	455
	456
f7deaa1a	457	/*
323c5de1	458	* 'wait_bc()' - Wait for back-channel data...
	459	*/
	460
7e86f2f6	461	static ssize_t /* O - # bytes read or -1 on error */
323c5de1	462	wait_bc(int device_fd, /* I - Socket */
	463	int secs) /* I - Seconds to wait */
	464	{
	465	struct timeval timeout; /* Timeout for select() */
	466	fd_set input; /* Input set for select() */
	467	ssize_t bytes; /* Number of back-channel bytes read */
	468	char buffer[1024]; /* Back-channel buffer */
	469
	470
	471	/*
	472	* Wait up to "secs" seconds for backchannel data...
	473	*/
	474
	475	timeout.tv_sec = secs;
	476	timeout.tv_usec = 0;
	477
	478	FD_ZERO(&input);
	479	FD_SET(device_fd, &input);
	480
	481	if (select(device_fd + 1, &input, NULL, NULL, &timeout) > 0)
	482	{
	483	/*
	484	* Grab the data coming back and spit it out to stderr...
	485	*/
	486
	487	if ((bytes = read(device_fd, buffer, sizeof(buffer))) > 0)
	488	{
4d301e69	489	fprintf(stderr, "DEBUG: Received %d bytes of back-channel data\n",
323c5de1	490	(int)bytes);
7e86f2f6	491	cupsBackChannelWrite(buffer, (size_t)bytes, 1.0);
323c5de1	492	}
	493
	494	return (bytes);
	495	}
	496	else
	497	return (-1);
	498	}