/* * bjnp backend for the Common UNIX Printing System (CUPS). * Copyright 2008 by Louis Lagendijk * * heavily based on cups AppSocket sources * 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 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. * * Contents: * * main() - Send a file to the printer or server. * side_cb() - removed and integrated in main loop of RunLoop * wait_bc() - removed as bjnp does not have a true backchannel * it is used to send acks only */ /* * Include necessary headers. */ #include "bjnp.h" #include #include #include #include #include #include #ifdef WIN32 # include #else # include # include # include # include # include # include #endif /* WIN32 */ /* * '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 */ { char method[255], /* Method 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 recoverable; /* Recoverable error shown? */ int contimeout; /* Connection timeout */ int port; /* Port number */ char portname[255]; /* Port name */ int delay; /* Delay for retries... */ int device_fd; /* AppSocket */ int error; /* Error code (if any) */ int i; /* loop variable */ http_addrlist_t *addrlist; /* Address list */ http_addr_t *addr; /* Connected address */ char addrname[256]; /* Address name */ ssize_t tbytes; /* Total number of bytes written */ char *bjnp_debugstr; /* environment string */ #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 */ /* * get debug level for printer discovery based on environment settings */ if ((bjnp_debugstr = getenv ("BJNP_DEBUG")) != NULL) bjnp_set_debug_level (bjnp_debugstr); /* * Check command-line... */ if (argc == 1) { struct printer_list printers[BJNP_PRINTERS_MAX]; int num_printers; int i; if ((num_printers = bjnp_discover_printers (printers)) == 0) puts ("network bjnp \"Unknown\" \"Canon network printer\""); else for (i = 0; i < num_printers; i++) { printf ("network bjnp://%s:%u \"%s\" \"%s %s\" \"%s\"\n", printers[i].hostname, printers[i].port, printers[i].model, printers[i].model, printers[i].hostname, printers[i].IEEE1284_id); } return (CUPS_BACKEND_OK); } else if (argc < 6 || argc > 7) { fprintf (stderr, "cups BJNP backend - version %s\n", VERSION); _cupsLangPrintf (stderr, _ ("Usage: %s job-id user title copies options [file]\n"), 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) { perror ("ERROR: unable to open print file"); return (CUPS_BACKEND_FAILED); } copies = atoi (argv[4]); } /* * Extract the hostname and port number from the URI... */ httpSeparateURI (HTTP_URI_CODING_ALL, cupsBackendDeviceURI (argv), method, sizeof (method), username, sizeof (username), hostname, sizeof (hostname), &port, resource, sizeof (resource)); if (port == 0) port = BJNP_PORT_PRINT; /* * Get options, if any... */ 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 (!strcasecmp (name, "contimeout")) { /* * Set the connection timeout... */ if (atoi (value) > 0) contimeout = atoi (value); } else if (!strcasecmp (name, "debuglevel")) { bjnp_set_debug_level (value); } } } /* * print command line arguments to debug log * We can not do that sooner, as we first need to initialize * the debug system */ for (i = 0; i < argc; i++) { bjnp_debug(LOG_DEBUG, "cups-bjnp: argv[%d] = %s\n", i, argv[i]); } /* * 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) { _cupsLangPrintf (stderr, _("ERROR: Unable to locate printer \'%s\'!\n"), hostname); return (CUPS_BACKEND_STOP); } _cupsLangPrintf (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 ( ( (addr = bjnp_start_job (addrlist, argv[2], argv[3]) ) == NULL) || ( device_fd = bjnp_addr_connect (addr)) < 0 ) { 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. */ _cupsLangPuts (stderr, _ ("INFO: Unable to contact printer, queuing on next " "printer in class...\n")); /* * Sleep 5 seconds to keep the job from requeuing too rapidly... */ sleep (5); return (CUPS_BACKEND_FAILED); } if (error == ECONNREFUSED || error == EHOSTDOWN || error == EHOSTUNREACH) { if (contimeout && (time (NULL) - start_time) > contimeout) { _cupsLangPuts (stderr, _("ERROR: Printer not responding!\n")); return (CUPS_BACKEND_FAILED); } recoverable = 1; _cupsLangPrintf (stderr, _ ("WARNING: recoverable: Network host \'%s\' is busy; " "will retry in %d seconds...\n"), hostname, delay); sleep (delay); if (delay < 30) delay += 5; } else { recoverable = 1; _cupsLangPrintf (stderr, "DEBUG: Connection error: %s\n", strerror (errno)); _cupsLangPuts (stderr, _ ("ERROR: recoverable: Unable to connect to printer; " "will retry in 30 seconds...\n")); sleep (30); } } else 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); _cupsLangPrintf (stderr, _("INFO: Connected to %s...\n"), hostname); get_address_info( addr, addrname, &port); fprintf (stderr, "DEBUG: Connected to [%s]:%d (%s)...\n", addrname, port, (addr->addr.sa_family == AF_INET ? "IPv4" : "IPV6") ); /* * Print everything... */ tbytes = 0; while (copies > 0 && tbytes >= 0) { copies--; if (print_fd != 0) { fputs ("PAGE: 1 1\n", stderr); lseek (print_fd, 0, SEEK_SET); } tbytes = bjnp_backendRunLoop (print_fd, device_fd, addr); if (print_fd != 0 && tbytes >= 0) { #ifdef HAVE_LONG_LONG _cupsLangPrintf (stderr, _("INFO: Sent print file, %lld bytes...\n"), CUPS_LLCAST tbytes); #else _cupsLangPrintf (stderr, _("INFO: Sent print file, %ld bytes...\n"), CUPS_LLCAST tbytes); #endif /* HAVE_LONG_LONG */ } } /* * Close the socket connection... */ close (device_fd); /* * and tell printer to finsh job */ bjnp_finish_job (addr); free(addr); addr = NULL; httpAddrFreeList (addrlist); addrlist = NULL; /* * delay a bit as otherwise next job may hang (reported by Zedonet for PIXMA MX7600) */ sleep(15); /* * Close the input file and return... */ if (print_fd != 0) close (print_fd); if (tbytes >= 0) _cupsLangPuts (stderr, _("INFO: Ready to print.\n")); return (tbytes < 0 ? CUPS_BACKEND_FAILED : CUPS_BACKEND_OK); } /* * End of "$Id: socket.c 6911 2007-09-04 20:35:08Z mike $". */