static int /* O - Zero on success, non-zero on failure */
lpd_queue(const char *hostname, /* I - Host to connect to */
http_addrlist_t *addrlist, /* I - List of host addresses */
const char *printer, /* I - Printer/queue name */
int print_fd, /* I - File to print */
int snmp_fd, /* I - SNMP socket */
int mode, /* I - Print mode */
const char *user, /* I - Requesting user */
const char *title, /* I - Job title */
int copies, /* I - Number of copies */
int banner, /* I - Print LPD banner? */
int format, /* I - Format specifier */
int order, /* I - Order of data/control files */
int reserve, /* I - Reserve ports? */
int manual_copies,/* I - Do copies by hand... */
int timeout, /* I - Timeout... */
int contimeout, /* I - Connection timeout */
const char *orighost) /* I - job-originating-host-name */
{
char localhost[255]; /* Local host name */
int error; /* Error number */
struct stat filestats; /* File statistics */
int lport; /* LPD connection local port */
int fd; /* LPD socket */
char control[10240], /* LPD control 'file' */
*cptr; /* Pointer into control file string */
char status; /* Status byte from command */
int delay; /* Delay for retries... */
char addrname[256]; /* Address name */
http_addrlist_t *addr; /* Socket address */
int have_supplies; /* Printer supports supply levels? */
int copy; /* Copies written */
time_t start_time; /* Time of first connect */
size_t nbytes; /* Number of bytes written */
off_t tbytes; /* Total bytes written */
char buffer[32768]; /* Output buffer */
#ifdef WIN32
DWORD tv; /* Timeout in milliseconds */
#else
struct timeval tv; /* Timeout in secs and usecs */
#endif /* WIN32 */
/*
* Remember when we started trying to connect to the printer...
*/
start_time = time(NULL);
/*
* Loop forever trying to print the file...
*/
while (!abort_job)
{
/*
* First try to reserve a port for this connection...
*/
fprintf(stderr, "DEBUG: Connecting to %s:%d for printer %s\n", hostname,
httpAddrPort(&(addrlist->addr)), printer);
_cupsLangPrintFilter(stderr, "INFO", _("Connecting to printer."));
for (lport = reserve == RESERVE_RFC1179 ? 732 : 1024, addr = addrlist,
delay = 5;;
addr = addr->next)
{
/*
* Stop if this job has been canceled...
*/
if (abort_job)
return (CUPS_BACKEND_FAILED);
/*
* Choose the next priviledged port...
*/
if (!addr)
addr = addrlist;
lport --;
if (lport < 721 && reserve == RESERVE_RFC1179)
lport = 731;
else if (lport < 1)
lport = 1023;
#ifdef HAVE_GETEUID
if (geteuid() || !reserve)
#else
if (getuid() || !reserve)
#endif /* HAVE_GETEUID */
{
/*
* Just create a regular socket...
*/
if ((fd = socket(addr->addr.addr.sa_family, SOCK_STREAM, 0)) < 0)
{
perror("DEBUG: Unable to create socket");
sleep(1);
continue;
}
lport = 0;
}
else
{
/*
* We're running as root and want to comply with RFC 1179. Reserve a
* priviledged lport between 721 and 731...
*/
if ((fd = rresvport_af(&lport, addr->addr.addr.sa_family)) < 0)
{
perror("DEBUG: Unable to reserve port");
sleep(1);
continue;
}
}
/*
* Connect to the printer or server...
*/
if (abort_job)
{
close(fd);
return (CUPS_BACKEND_FAILED);
}
if (!connect(fd, &(addr->addr.addr), httpAddrLength(&(addr->addr))))
break;
error = errno;
close(fd);
if (addr->next)
continue;
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 (error == ECONNREFUSED || error == EHOSTDOWN ||
error == EHOSTUNREACH)
{
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 :
_cupsLangPrintFilter(stderr, "WARNING",
_("The printer is unreachable at "
"this time."));
break;
case ECONNREFUSED :
default :
_cupsLangPrintFilter(stderr, "WARNING",
_("The printer is in use."));
break;
}
sleep(delay);
if (delay < 30)
delay += 5;
}
else if (error == EADDRINUSE)
{
/*
* Try on another port...
*/
sleep(1);
}
else
{
_cupsLangPrintFilter(stderr, "ERROR",
_("The printer is not responding."));
sleep(30);
}
}
/*
* Set the timeout...
*/
#ifdef WIN32
tv = (DWORD)(timeout * 1000);
setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, (char *)&tv, sizeof(tv));
setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, (char *)&tv, sizeof(tv));
#else
tv.tv_sec = timeout;
tv.tv_usec = 0;
setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
#endif /* WIN32 */
fputs("STATE: -connecting-to-device\n", stderr);
_cupsLangPrintFilter(stderr, "INFO", _("Connected to printer."));
fprintf(stderr, "DEBUG: Connected to %s:%d (local port %d)...\n",
httpAddrString(&(addr->addr), addrname, sizeof(addrname)),
httpAddrPort(&(addr->addr)), lport);
/*
* See if the printer supports SNMP...
*/
if (snmp_fd >= 0)
have_supplies = !backendSNMPSupplies(snmp_fd, &(addrlist->addr), NULL,
NULL);
else
have_supplies = 0;
/*
* Check for side-channel requests...
*/
backendCheckSideChannel(snmp_fd, &(addrlist->addr));
/*
* Next, open the print file and figure out its size...
*/
if (print_fd)
{
/*
* Use the size from the print file...
*/
if (fstat(print_fd, &filestats))
{
close(fd);
perror("DEBUG: unable to stat print file");
return (CUPS_BACKEND_FAILED);
}
filestats.st_size *= manual_copies;
}
else
{
/*
* Use a "very large value" for the size so that the printer will
* keep printing until we close the connection...
*/
#ifdef _LARGEFILE_SOURCE
filestats.st_size = (size_t)(999999999999.0);
#else
filestats.st_size = 2147483647;
#endif /* _LARGEFILE_SOURCE */
}
/*
* Send a job header to the printer, specifying no banner page and
* literal output...
*/
if (lpd_command(fd, "\002%s\n",
printer)) /* Receive print job(s) */
{
close(fd);
return (CUPS_BACKEND_FAILED);
}
if (orighost && _cups_strcasecmp(orighost, "localhost"))
strlcpy(localhost, orighost, sizeof(localhost));
else
httpGetHostname(NULL, localhost, sizeof(localhost));
snprintf(control, sizeof(control),
"H%.31s\n" /* RFC 1179, Section 7.2 - host name <= 31 chars */
"P%.31s\n" /* RFC 1179, Section 7.2 - user name <= 31 chars */
"J%.99s\n", /* RFC 1179, Section 7.2 - job name <= 99 chars */
localhost, user, title);
cptr = control + strlen(control);
if (banner)
{
snprintf(cptr, sizeof(control) - (cptr - control),
"C%.31s\n" /* RFC 1179, Section 7.2 - class name <= 31 chars */
"L%s\n",
localhost, user);
cptr += strlen(cptr);
}
while (copies > 0)
{
snprintf(cptr, sizeof(control) - (cptr - control), "%cdfA%03d%.15s\n",
format, (int)getpid() % 1000, localhost);
cptr += strlen(cptr);
copies --;
}
snprintf(cptr, sizeof(control) - (cptr - control),
"UdfA%03d%.15s\n"
"N%.131s\n", /* RFC 1179, Section 7.2 - sourcefile name <= 131 chars */
(int)getpid() % 1000, localhost, title);
fprintf(stderr, "DEBUG: Control file is:\n%s", control);
if (order == ORDER_CONTROL_DATA)
{
/*
* Check for side-channel requests...
*/
backendCheckSideChannel(snmp_fd, &(addr->addr));
/*
* Send the control file...
*/
if (lpd_command(fd, "\002%d cfA%03.3d%.15s\n", strlen(control),
(int)getpid() % 1000, localhost))
{
close(fd);
return (CUPS_BACKEND_FAILED);
}
fprintf(stderr, "DEBUG: Sending control file (%u bytes)\n",
(unsigned)strlen(control));
if (lpd_write(fd, control, strlen(control) + 1) < (strlen(control) + 1))
{
status = errno;
perror("DEBUG: Unable to write control file");
}
else
{
if (read(fd, &status, 1) < 1)
{
_cupsLangPrintFilter(stderr, "WARNING",
_("The printer did not respond."));
status = errno;
}
}
if (status != 0)
_cupsLangPrintFilter(stderr, "ERROR",
_("Remote host did not accept control file (%d)."),
status);
else
_cupsLangPrintFilter(stderr, "INFO",
_("Control file sent successfully."));
}
else
status = 0;
if (status == 0)
{
/*
* Check for side-channel requests...
*/
backendCheckSideChannel(snmp_fd, &(addr->addr));
/*
* Send the print file...
*/
if (lpd_command(fd, "\003" CUPS_LLFMT " dfA%03.3d%.15s\n",
CUPS_LLCAST filestats.st_size, (int)getpid() % 1000,
localhost))
{
close(fd);
return (CUPS_BACKEND_FAILED);
}
fprintf(stderr, "DEBUG: Sending data file (" CUPS_LLFMT " bytes)\n",
CUPS_LLCAST filestats.st_size);
tbytes = 0;
for (copy = 0; copy < manual_copies; copy ++)
{
lseek(print_fd, 0, SEEK_SET);
while ((nbytes = read(print_fd, buffer, sizeof(buffer))) > 0)
{
_cupsLangPrintFilter(stderr, "INFO",
_("Spooling job, %.0f%% complete."),
100.0 * tbytes / filestats.st_size);
if (lpd_write(fd, buffer, nbytes) < nbytes)
{
perror("DEBUG: Unable to send print file to printer");
break;
}
else
tbytes += nbytes;
}
}
if (mode == MODE_STANDARD)
{
if (tbytes < filestats.st_size)
status = errno;
else if (lpd_write(fd, "", 1) < 1)
{
perror("DEBUG: Unable to send trailing nul to printer");
status = errno;
}
else
{
/*
* Read the status byte from the printer; if we can't read the byte
* back now, we should set status to "errno", however at this point
* we know the printer got the whole file and we don't necessarily
* want to requeue it over and over...
*/
if (recv(fd, &status, 1, 0) < 1)
{
_cupsLangPrintFilter(stderr, "WARNING",
_("The printer did not respond."));
status = 0;
}
}
}
else
status = 0;
if (status != 0)
_cupsLangPrintFilter(stderr, "ERROR",
_("Remote host did not accept data file (%d)."),
status);
else
_cupsLangPrintFilter(stderr, "INFO",
_("Data file sent successfully."));
}
if (status == 0 && order == ORDER_DATA_CONTROL)
{
/*
* Check for side-channel requests...
*/
backendCheckSideChannel(snmp_fd, &(addr->addr));
/*
* Send control file...
*/
if (lpd_command(fd, "\002%d cfA%03.3d%.15s\n", strlen(control),
(int)getpid() % 1000, localhost))
{
close(fd);
return (CUPS_BACKEND_FAILED);
}
fprintf(stderr, "DEBUG: Sending control file (%lu bytes)\n",
(unsigned long)strlen(control));
if (lpd_write(fd, control, strlen(control) + 1) < (strlen(control) + 1))
{
status = errno;
perror("DEBUG: Unable to write control file");
}
else
{
if (read(fd, &status, 1) < 1)
{
_cupsLangPrintFilter(stderr, "WARNING",
_("The printer did not respond."));
status = errno;
}
}
if (status != 0)
_cupsLangPrintFilter(stderr, "ERROR",
_("Remote host did not accept control file (%d)."),
status);
else
_cupsLangPrintFilter(stderr, "INFO",
_("Control file sent successfully."));
}
/*
* Collect the final supply levels as needed...
*/
if (have_supplies)
backendSNMPSupplies(snmp_fd, &(addr->addr), NULL, NULL);
/*
* Close the socket connection and input file...
*/
close(fd);
if (status == 0)
return (CUPS_BACKEND_OK);
/*
* Waiting for a retry...
*/
sleep(30);
}
/*
* If we get here, then the job has been canceled...
*/
return (CUPS_BACKEND_FAILED);
}
static int /* O - Zero on success, non-zero on failure */
lpd_queue(const char *hostname, /* I - Host to connect to */
int port, /* I - Port to connect on */
const char *printer, /* I - Printer/queue name */
const char *filename, /* I - File to print */
const char *user, /* I - Requesting user */
const char *title, /* I - Job title */
int copies, /* I - Number of copies */
int banner, /* I - Print LPD banner? */
int format, /* I - Format specifier */
int order, /* I - Order of data/control files */
int reserve, /* I - Reserve ports? */
int manual_copies, /* I - Do copies by hand... */
int timeout) /* I - Timeout... */
{
FILE *fp; /* Job file */
char localhost[255]; /* Local host name */
int error; /* Error number */
struct stat filestats; /* File statistics */
int lport; /* LPD connection local port */
int fd; /* LPD socket */
char control[10240], /* LPD control 'file' */
*cptr; /* Pointer into control file string */
char status; /* Status byte from command */
struct sockaddr_in addr; /* Socket address */
struct hostent *hostaddr; /* Host address */
int copy; /* Copies written */
size_t nbytes, /* Number of bytes written */
tbytes; /* Total bytes written */
char buffer[8192]; /* Output buffer */
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
struct sigaction action; /* Actions for POSIX signals */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET */
/*
* Setup an alarm handler for timeouts...
*/
#ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */
sigset(SIGALRM, lpd_timeout);
#elif defined(HAVE_SIGACTION)
memset(&action, 0, sizeof(action));
sigemptyset(&action.sa_mask);
action.sa_handler = lpd_timeout;
sigaction(SIGALRM, &action, NULL);
#else
signal(SIGALRM, lpd_timeout);
#endif /* HAVE_SIGSET */
/*
* Loop forever trying to print the file...
*/
for (;;) /* FOREVER */
{
/*
* First try to reserve a port for this connection...
*/
if ((hostaddr = httpGetHostByName(hostname)) == NULL)
{
fprintf(stderr, "ERROR: Unable to locate printer \'%s\' - %s\n",
hostname, hstrerror(h_errno));
return (1);
}
fprintf(stderr, "INFO: Attempting to connect to host %s for printer %s\n",
hostname, printer);
memset(&addr, 0, sizeof(addr));
memcpy(&(addr.sin_addr), hostaddr->h_addr, hostaddr->h_length);
addr.sin_family = hostaddr->h_addrtype;
addr.sin_port = htons(port);
for (lport = reserve == RESERVE_RFC1179 ? 732 : 1024;;)
{
/*
* Choose the next priviledged port...
*/
lport --;
if (lport < 721 && reserve == RESERVE_RFC1179)
lport = 731;
else if (lport < 1)
lport = 1023;
#ifdef HAVE_GETEUID
if (geteuid() || !reserve)
#else
if (getuid() || !reserve)
#endif /* HAVE_GETEUID */
{
/*
* Just create a regular socket...
*/
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
perror("ERROR: Unable to create socket");
return (1);
}
lport = 0;
}
else
{
/*
* We're running as root and want to comply with RFC 1179. Reserve a
* priviledged lport between 721 and 731...
*/
if ((fd = rresvport(&lport)) < 0)
{
perror("ERROR: Unable to reserve port");
sleep(1);
continue;
}
}
if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
{
error = errno;
close(fd);
fd = -1;
if (error == ECONNREFUSED || error == EHOSTDOWN ||
error == EHOSTUNREACH)
{
fprintf(stderr, "WARNING: Network host \'%s\' is busy, down, or unreachable; will retry in 30 seconds...\n",
hostname);
sleep(30);
}
else if (error == EADDRINUSE)
{
/*
* Try on another port...
*/
sleep(1);
}
else
{
perror("ERROR: Unable to connect to printer; will retry in 30 seconds...");
sleep(30);
}
}
else
break;
}
fprintf(stderr, "INFO: Connected to %s...\n", hostname);
fprintf(stderr, "DEBUG: Connected on ports %d (local %d)...\n", port,
lport);
/*
* Next, open the print file and figure out its size...
*/
if (stat(filename, &filestats))
{
perror("ERROR: unable to stat print file");
return (1);
}
filestats.st_size *= manual_copies;
if ((fp = fopen(filename, "rb")) == NULL)
{
perror("ERROR: unable to open print file for reading");
return (1);
}
/*
* Send a job header to the printer, specifying no banner page and
* literal output...
*/
if (lpd_command(fd, timeout, "\002%s\n",
printer)) /* Receive print job(s) */
return (1);
gethostname(localhost, sizeof(localhost));
localhost[31] = '\0'; /* RFC 1179, Section 7.2 - host name < 32 chars */
snprintf(control, sizeof(control), "H%s\nP%s\nJ%s\n", localhost, user,
title);
cptr = control + strlen(control);
if (banner)
{
snprintf(cptr, sizeof(control) - (cptr - control), "C%s\nL%s\n",
localhost, user);
cptr += strlen(cptr);
}
while (copies > 0)
{
snprintf(cptr, sizeof(control) - (cptr - control), "%cdfA%03d%.15s\n", format,
getpid() % 1000, localhost);
cptr += strlen(cptr);
copies --;
}
snprintf(cptr, sizeof(control) - (cptr - control),
"UdfA%03d%.15s\nN%s\n",
getpid() % 1000, localhost, title);
fprintf(stderr, "DEBUG: Control file is:\n%s", control);
if (order == ORDER_CONTROL_DATA)
{
if (lpd_command(fd, timeout, "\002%d cfA%03.3d%.15s\n", strlen(control),
getpid() % 1000, localhost))
return (1);
fprintf(stderr, "INFO: Sending control file (%lu bytes)\n",
(unsigned long)strlen(control));
if (lpd_write(fd, control, strlen(control) + 1) < (strlen(control) + 1))
{
status = errno;
perror("ERROR: Unable to write control file");
}
else
{
alarm(timeout);
if (read(fd, &status, 1) < 1)
{
fprintf(stderr, "WARNING: Remote host did not respond with control "
"status byte after %d seconds!\n", timeout);
status = errno;
}
alarm(0);
}
if (status != 0)
fprintf(stderr, "ERROR: Remote host did not accept control file (%d)\n",
status);
else
fputs("INFO: Control file sent successfully\n", stderr);
}
else
status = 0;
if (status == 0)
{
/*
* Send the print file...
*/
if (lpd_command(fd, timeout, "\003%u dfA%03.3d%.15s\n",
(unsigned)filestats.st_size, getpid() % 1000,
localhost))
return (1);
fprintf(stderr, "INFO: Sending data file (%u bytes)\n",
(unsigned)filestats.st_size);
tbytes = 0;
for (copy = 0; copy < manual_copies; copy ++)
{
rewind(fp);
while ((nbytes = fread(buffer, 1, sizeof(buffer), fp)) > 0)
{
fprintf(stderr, "INFO: Spooling LPR job, %u%% complete...\n",
(unsigned)(100.0f * tbytes / filestats.st_size));
if (lpd_write(fd, buffer, nbytes) < nbytes)
{
perror("ERROR: Unable to send print file to printer");
break;
}
else
tbytes += nbytes;
}
}
if (tbytes < filestats.st_size)
status = errno;
else if (lpd_write(fd, "", 1) < 1)
{
perror("ERROR: Unable to send trailing nul to printer");
status = errno;
}
else
{
/*
* Read the status byte from the printer; if we can't read the byte
* back now, we should set status to "errno", however at this point
* we know the printer got the whole file and we don't necessarily
* want to requeue it over and over...
*/
alarm(timeout);
if (recv(fd, &status, 1, 0) < 1)
{
fprintf(stderr, "WARNING: Remote host did not respond with data "
"status byte after %d seconds!\n", timeout);
status = 0;
}
alarm(0);
}
if (status != 0)
fprintf(stderr, "ERROR: Remote host did not accept data file (%d)\n",
status);
else
fputs("INFO: Data file sent successfully\n", stderr);
}
if (status == 0 && order == ORDER_DATA_CONTROL)
{
if (lpd_command(fd, timeout, "\002%d cfA%03.3d%.15s\n", strlen(control),
getpid() % 1000, localhost))
return (1);
fprintf(stderr, "INFO: Sending control file (%lu bytes)\n",
(unsigned long)strlen(control));
if (lpd_write(fd, control, strlen(control) + 1) < (strlen(control) + 1))
{
status = errno;
perror("ERROR: Unable to write control file");
}
else
{
alarm(timeout);
if (read(fd, &status, 1) < 1)
{
fprintf(stderr, "WARNING: Remote host did not respond with control "
"status byte after %d seconds!\n", timeout);
status = errno;
}
alarm(0);
}
if (status != 0)
fprintf(stderr, "ERROR: Remote host did not accept control file (%d)\n",
status);
else
fputs("INFO: Control file sent successfully\n", stderr);
}
/*
* Close the socket connection and input file...
*/
close(fd);
fclose(fp);
if (status == 0)
return (0);
/*
* Waiting for a retry...
*/
sleep(30);
}
}
