/*
- * "$Id$"
+ * "$Id: socket.c 6649 2007-07-11 21:46:42Z mike $"
*
* AppSocket backend for the Common UNIX Printing System (CUPS).
*
- * Copyright 1997-2006 by Easy Software Products, all rights reserved.
+ * Copyright 2007 by Apple Inc.
+ * Copyright 1997-2007 by Easy Software Products, all rights reserved.
*
* These coded instructions, statements, and computer programs are the
- * property of Easy Software Products and are protected by Federal
- * copyright law. Distribution and use rights are outlined in the file
+ * 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 please contact Easy Software Products
- * at:
- *
- * Attn: CUPS Licensing Information
- * Easy Software Products
- * 44141 Airport View Drive, Suite 204
- * Hollywood, Maryland 20636 USA
- *
- * Voice: (301) 373-9600
- * EMail: cups-info@cups.org
- * WWW: http://www.cups.org
+ * file is missing or damaged, see the license at "http://www.cups.org/".
*
* This file is subject to the Apple OS-Developed Software exception.
*
* Contents:
*
- * main() - Send a file to the printer or server.
+ * main() - Send a file to the printer or server.
+ * side_cb() - Handle side-channel requests...
+ * wait_bc() - Wait for back-channel data...
*/
/*
#endif /* WIN32 */
+/*
+ * Local functions...
+ */
+
+static void side_cb(int print_fd, int device_fd, int use_bc);
+static int wait_bc(int device_fd, int secs);
+
+
/*
* 'main()' - Send a file to the printer or server.
*
*ptr; /* Pointer into name or value */
int print_fd; /* Print file */
int copies; /* Number of copies to print */
+ time_t start_time; /* Time of first connect */
+ int recoverable; /* Recoverable error shown? */
+ int contimeout; /* Connection timeout */
int waiteof; /* Wait for end-of-file? */
int port; /* Port number */
char portname[255]; /* Port name */
int delay; /* Delay for retries... */
int device_fd; /* AppSocket */
int error; /* Error code (if any) */
- http_addrlist_t *addrlist; /* Address list */
+ http_addrlist_t *addrlist, /* Address list */
+ *addr; /* Connected address */
+ char addrname[256]; /* Address name */
ssize_t tbytes; /* Total number of bytes written */
- struct timeval timeout; /* Timeout for select() */
- fd_set input; /* Input set for select() */
- ssize_t bc_bytes; /* Number of back-channel bytes read */
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
struct sigaction action; /* Actions for POSIX signals */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET */
}
else if (argc < 6 || argc > 7)
{
- fprintf(stderr, "Usage: %s job-id user title copies options [file]\n",
+ fprintf(stderr, _("Usage: %s job-id user title copies options [file]\n"),
argv[0]);
return (CUPS_BACKEND_FAILED);
}
* Get options, if any...
*/
- waiteof = 1;
+ waiteof = 1;
+ contimeout = 7 * 24 * 60 * 60;
if ((options = strchr(resource, '?')) != NULL)
{
waiteof = !value[0] || !strcasecmp(value, "on") ||
!strcasecmp(value, "yes") || !strcasecmp(value, "true");
}
+ else if (!strcasecmp(name, "contimeout"))
+ {
+ /*
+ * Set the connection timeout...
+ */
+
+ if (atoi(value) > 0)
+ contimeout = atoi(value);
+ }
}
}
* Then try to connect to the remote host...
*/
+ recoverable = 0;
+ start_time = time(NULL);
+
sprintf(portname, "%d", port);
if ((addrlist = httpAddrGetList(hostname, AF_UNSPEC, portname)) == NULL)
{
- fprintf(stderr, "ERROR: Unable to locate printer \'%s\'!\n", hostname);
+ fprintf(stderr, _("ERROR: Unable to locate printer \'%s\'!\n"), hostname);
return (CUPS_BACKEND_STOP);
}
- fprintf(stderr, "INFO: Attempting to connect to host %s on port %d\n",
+ fprintf(stderr, _("INFO: Attempting to connect to host %s on port %d\n"),
hostname, port);
fputs("STATE: +connecting-to-device\n", stderr);
for (delay = 5;;)
{
- if (!httpAddrConnect(addrlist, &device_fd))
+ if ((addr = httpAddrConnect(addrlist, &device_fd)) == NULL)
{
error = errno;
device_fd = -1;
* available printer in the class.
*/
- fprintf(stderr, "INFO: Unable to connect to \"%s\", queuing on next printer in class...\n",
- hostname);
+ fputs(_("INFO: Unable to contact printer, queuing on next "
+ "printer in class...\n"), stderr);
/*
* Sleep 5 seconds to keep the job from requeuing too rapidly...
if (error == ECONNREFUSED || error == EHOSTDOWN ||
error == EHOSTUNREACH)
{
+ if (contimeout && (time(NULL) - start_time) > contimeout)
+ {
+ fputs(_("ERROR: Printer not responding!\n"), stderr);
+ return (CUPS_BACKEND_FAILED);
+ }
+
+ recoverable = 1;
+
fprintf(stderr,
- "INFO: Network host \'%s\' is busy; will retry in %d seconds...\n",
- hostname, delay);
+ _("WARNING: recoverable: Network host \'%s\' is busy; will "
+ "retry in %d seconds...\n"),
+ hostname, delay);
+
sleep(delay);
if (delay < 30)
}
else
{
- perror("ERROR: Unable to connect to printer (retrying in 30 seconds)");
+ recoverable = 1;
+
+ fprintf(stderr, "DEBUG: Connection error: %s\n", strerror(errno));
+ fputs(_("ERROR: recoverable: Unable to connect to printer; will "
+ "retry in 30 seconds...\n"), stderr);
sleep(30);
}
}
break;
}
+ if (recoverable)
+ {
+ /*
+ * If we've shown a recoverable error make sure the printer proxies
+ * have a chance to see the recovered message. Not pretty but
+ * necessary for now...
+ */
+
+ fputs("INFO: recovered: \n", stderr);
+ sleep(5);
+ }
+
fputs("STATE: -connecting-to-device\n", stderr);
+ fprintf(stderr, _("INFO: Connected to %s...\n"), hostname);
+
+#ifdef AF_INET6
+ if (addr->addr.addr.sa_family == AF_INET6)
+ fprintf(stderr, "DEBUG: Connected to [%s]:%d (IPv6)...\n",
+ httpAddrString(&addr->addr, addrname, sizeof(addrname)),
+ ntohs(addr->addr.ipv6.sin6_port));
+ else
+#endif /* AF_INET6 */
+ if (addr->addr.addr.sa_family == AF_INET)
+ fprintf(stderr, "DEBUG: Connected to %s:%d (IPv4)...\n",
+ httpAddrString(&addr->addr, addrname, sizeof(addrname)),
+ ntohs(addr->addr.ipv4.sin_port));
/*
* Print everything...
lseek(print_fd, 0, SEEK_SET);
}
- tbytes = backendRunLoop(print_fd, device_fd, 1);
+ tbytes = backendRunLoop(print_fd, device_fd, 1, side_cb);
if (print_fd != 0 && tbytes >= 0)
- fprintf(stderr, "INFO: Sent print file, " CUPS_LLFMT " bytes...\n",
- CUPS_LLCAST tbytes);
+ fprintf(stderr,
+#ifdef HAVE_LONG_LONG
+ _("INFO: Sent print file, %lld bytes...\n"),
+#else
+ _("INFO: Sent print file, %ld bytes...\n"),
+#endif /* HAVE_LONG_LONG */
+ CUPS_LLCAST tbytes);
}
+ /*
+ * Get any pending back-channel data...
+ */
+
+ while (wait_bc(device_fd, 5) > 0);
+
if (waiteof)
{
/*
* Shutdown the socket and wait for the other end to finish...
*/
- fputs("INFO: Print file sent, waiting for printer to finish...\n", stderr);
+ fputs(_("INFO: Print file sent, waiting for printer to finish...\n"),
+ stderr);
shutdown(device_fd, 1);
- for (;;)
- {
- /*
- * Wait a maximum of 90 seconds for backchannel data or a closed
- * connection...
- */
-
- timeout.tv_sec = 90;
- timeout.tv_usec = 0;
-
- FD_ZERO(&input);
- FD_SET(device_fd, &input);
-
-#ifdef __hpux
- if (select(device_fd + 1, (int *)&input, NULL, NULL, &timeout) > 0)
-#else
- if (select(device_fd + 1, &input, NULL, NULL, &timeout) > 0)
-#endif /* __hpux */
- {
- /*
- * Grab the data coming back and spit it out to stderr...
- */
-
- if ((bc_bytes = read(device_fd, resource, sizeof(resource))) > 0)
- {
- fprintf(stderr, "DEBUG: Received %d bytes of back-channel data!\n",
- (int)bc_bytes);
- cupsBackChannelWrite(resource, bc_bytes, 1.0);
- }
- else
- break;
- }
- else
- break;
- }
+ while (wait_bc(device_fd, 90) > 0);
}
/*
close(print_fd);
if (tbytes >= 0)
- fputs("INFO: Ready to print.\n", stderr);
+ fputs(_("INFO: Ready to print.\n"), stderr);
return (tbytes < 0 ? CUPS_BACKEND_FAILED : CUPS_BACKEND_OK);
}
/*
- * End of "$Id$".
+ * 'side_cb()' - Handle side-channel requests...
+ */
+
+static void
+side_cb(int print_fd, /* I - Print file */
+ int device_fd, /* I - Device file */
+ int use_bc) /* I - Using back-channel? */
+{
+ cups_sc_command_t command; /* Request command */
+ cups_sc_status_t status; /* Request/response status */
+ char data[2048]; /* Request/response data */
+ int datalen; /* Request/response data size */
+
+
+ datalen = sizeof(data);
+
+ if (cupsSideChannelRead(&command, &status, data, &datalen, 1.0))
+ {
+ fputs(_("WARNING: Failed to read side-channel request!\n"), stderr);
+ return;
+ }
+
+ switch (command)
+ {
+ case CUPS_SC_CMD_DRAIN_OUTPUT :
+ /*
+ * Our sockets disable the Nagle algorithm and data is sent immediately.
+ */
+
+ if (backendDrainOutput(print_fd, device_fd))
+ status = CUPS_SC_STATUS_IO_ERROR;
+ else
+ status = CUPS_SC_STATUS_OK;
+
+ datalen = 0;
+ break;
+
+ case CUPS_SC_CMD_GET_BIDI :
+ data[0] = use_bc;
+ datalen = 1;
+ break;
+
+ default :
+ status = CUPS_SC_STATUS_NOT_IMPLEMENTED;
+ datalen = 0;
+ break;
+ }
+
+ cupsSideChannelWrite(command, status, data, datalen, 1.0);
+}
+
+
+/*
+ * 'wait_bc()' - Wait for back-channel data...
+ */
+
+static int /* 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, bytes, 1.0);
+ }
+
+ return (bytes);
+ }
+ else
+ return (-1);
+}
+
+
+/*
+ * End of "$Id: socket.c 6649 2007-07-11 21:46:42Z mike $".
*/
projects / thirdparty / cups.git / blobdiff