cups/ppd-util.c

   1 /*
   2  * PPD utilities for CUPS.
   3  *
   4  * Copyright 2007-2015 by Apple Inc.
   5  * Copyright 1997-2006 by Easy Software Products.
   6  *
   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  * which should have been included with this file.  If this file is
  11  * file is missing or damaged, see the license at "http://www.cups.org/".
  12  *
  13  * This file is subject to the Apple OS-Developed Software exception.
  14  */
  15
  16 /*
  17  * Include necessary headers...
  18  */
  19
  20 #include "cups-private.h"
  21 #include "ppd-private.h"
  22 #include <fcntl.h>
  23 #include <sys/stat.h>
  24 #if defined(WIN32) || defined(__EMX__)
  25 #  include <io.h>
  26 #else
  27 #  include <unistd.h>
  28 #endif /* WIN32 || __EMX__ */
  29
  30
  31 /*
  32  * Local functions...
  33  */
  34
  35 static int      cups_get_printer_uri(http_t *http, const char *name,
  36                                      char *host, int hostsize, int *port,
  37                                      char *resource, int resourcesize,
  38                                      int depth);
  39
  40
  41 /*
  42  * 'cupsGetPPD()' - Get the PPD file for a printer on the default server.
  43  *
  44  * For classes, @code cupsGetPPD@ returns the PPD file for the first printer
  45  * in the class.
  46  *
  47  * The returned filename is stored in a static buffer and is overwritten with
  48  * each call to @code cupsGetPPD@ or @link cupsGetPPD2@.  The caller "owns" the
  49  * file that is created and must @code unlink@ the returned filename.
  50  */
  51
  52 const char *                            /* O - Filename for PPD file */
  53 cupsGetPPD(const char *name)            /* I - Destination name */
  54 {
  55   _ppd_globals_t *pg = _ppdGlobals();   /* Pointer to library globals */
  56   time_t        modtime = 0;            /* Modification time */
  57
  58
  59  /*
  60   * Return the PPD file...
  61   */
  62
  63   pg->ppd_filename[0] = '\0';
  64
  65   if (cupsGetPPD3(CUPS_HTTP_DEFAULT, name, &modtime, pg->ppd_filename,
  66                   sizeof(pg->ppd_filename)) == HTTP_STATUS_OK)
  67     return (pg->ppd_filename);
  68   else
  69     return (NULL);
  70 }
  71
  72
  73 /*
  74  * 'cupsGetPPD2()' - Get the PPD file for a printer from the specified server.
  75  *
  76  * For classes, @code cupsGetPPD2@ returns the PPD file for the first printer
  77  * in the class.
  78  *
  79  * The returned filename is stored in a static buffer and is overwritten with
  80  * each call to @link cupsGetPPD@ or @code cupsGetPPD2@.  The caller "owns" the
  81  * file that is created and must @code unlink@ the returned filename.
  82  *
  83  * @since CUPS 1.1.21/macOS 10.4@
  84  */
  85
  86 const char *                            /* O - Filename for PPD file */
  87 cupsGetPPD2(http_t     *http,           /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
  88             const char *name)           /* I - Destination name */
  89 {
  90   _ppd_globals_t *pg = _ppdGlobals();   /* Pointer to library globals */
  91   time_t        modtime = 0;            /* Modification time */
  92
  93
  94   pg->ppd_filename[0] = '\0';
  95
  96   if (cupsGetPPD3(http, name, &modtime, pg->ppd_filename,
  97                   sizeof(pg->ppd_filename)) == HTTP_STATUS_OK)
  98     return (pg->ppd_filename);
  99   else
 100     return (NULL);
 101 }
 102
 103
 104 /*
 105  * 'cupsGetPPD3()' - Get the PPD file for a printer on the specified
 106  *                   server if it has changed.
 107  *
 108  * The "modtime" parameter contains the modification time of any
 109  * locally-cached content and is updated with the time from the PPD file on
 110  * the server.
 111  *
 112  * The "buffer" parameter contains the local PPD filename.  If it contains
 113  * the empty string, a new temporary file is created, otherwise the existing
 114  * file will be overwritten as needed.  The caller "owns" the file that is
 115  * created and must @code unlink@ the returned filename.
 116  *
 117  * On success, @code HTTP_STATUS_OK@ is returned for a new PPD file and
 118  * @code HTTP_STATUS_NOT_MODIFIED@ if the existing PPD file is up-to-date.  Any other
 119  * status is an error.
 120  *
 121  * For classes, @code cupsGetPPD3@ returns the PPD file for the first printer
 122  * in the class.
 123  *
 124  * @since CUPS 1.4/macOS 10.6@
 125  */
 126
 127 http_status_t                           /* O  - HTTP status */
 128 cupsGetPPD3(http_t     *http,           /* I  - HTTP connection or @code CUPS_HTTP_DEFAULT@ */
 129             const char *name,           /* I  - Destination name */
 130             time_t     *modtime,        /* IO - Modification time */
 131             char       *buffer,         /* I  - Filename buffer */
 132             size_t     bufsize)         /* I  - Size of filename buffer */
 133 {
 134   int           http_port;              /* Port number */
 135   char          http_hostname[HTTP_MAX_HOST];
 136                                         /* Hostname associated with connection */
 137   http_t        *http2;                 /* Alternate HTTP connection */
 138   int           fd;                     /* PPD file */
 139   char          localhost[HTTP_MAX_URI],/* Local hostname */
 140                 hostname[HTTP_MAX_URI], /* Hostname */
 141                 resource[HTTP_MAX_URI]; /* Resource name */
 142   int           port;                   /* Port number */
 143   http_status_t status;                 /* HTTP status from server */
 144   char          tempfile[1024] = "";    /* Temporary filename */
 145   _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */
 146
 147
 148  /*
 149   * Range check input...
 150   */
 151
 152   DEBUG_printf(("cupsGetPPD3(http=%p, name=\"%s\", modtime=%p(%d), buffer=%p, "
 153                 "bufsize=%d)", http, name, modtime,
 154                 modtime ? (int)*modtime : 0, buffer, (int)bufsize));
 155
 156   if (!name)
 157   {
 158     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No printer name"), 1);
 159     return (HTTP_STATUS_NOT_ACCEPTABLE);
 160   }
 161
 162   if (!modtime)
 163   {
 164     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No modification time"), 1);
 165     return (HTTP_STATUS_NOT_ACCEPTABLE);
 166   }
 167
 168   if (!buffer || bufsize <= 1)
 169   {
 170     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Bad filename buffer"), 1);
 171     return (HTTP_STATUS_NOT_ACCEPTABLE);
 172   }
 173
 174 #ifndef WIN32
 175  /*
 176   * See if the PPD file is available locally...
 177   */
 178
 179   if (http)
 180     httpGetHostname(http, hostname, sizeof(hostname));
 181   else
 182   {
 183     strlcpy(hostname, cupsServer(), sizeof(hostname));
 184     if (hostname[0] == '/')
 185       strlcpy(hostname, "localhost", sizeof(hostname));
 186   }
 187
 188   if (!_cups_strcasecmp(hostname, "localhost"))
 189   {
 190     char        ppdname[1024];          /* PPD filename */
 191     struct stat ppdinfo;                /* PPD file information */
 192
 193
 194     snprintf(ppdname, sizeof(ppdname), "%s/ppd/%s.ppd", cg->cups_serverroot,
 195              name);
 196     if (!stat(ppdname, &ppdinfo) && !access(ppdname, R_OK))
 197     {
 198      /*
 199       * OK, the file exists and is readable, use it!
 200       */
 201
 202       if (buffer[0])
 203       {
 204         unlink(buffer);
 205
 206         if (symlink(ppdname, buffer) && errno != EEXIST)
 207         {
 208           _cupsSetError(IPP_STATUS_ERROR_INTERNAL, NULL, 0);
 209
 210           return (HTTP_STATUS_SERVER_ERROR);
 211         }
 212       }
 213       else
 214       {
 215         int             tries;          /* Number of tries */
 216         const char      *tmpdir;        /* TMPDIR environment variable */
 217         struct timeval  curtime;        /* Current time */
 218
 219        /*
 220         * Previously we put root temporary files in the default CUPS temporary
 221         * directory under /var/spool/cups.  However, since the scheduler cleans
 222         * out temporary files there and runs independently of the user apps, we
 223         * don't want to use it unless specifically told to by cupsd.
 224         */
 225
 226         if ((tmpdir = getenv("TMPDIR")) == NULL)
 227 #  ifdef __APPLE__
 228           tmpdir = "/private/tmp";      /* /tmp is a symlink to /private/tmp */
 229 #  else
 230           tmpdir = "/tmp";
 231 #  endif /* __APPLE__ */
 232
 233        /*
 234         * Make the temporary name using the specified directory...
 235         */
 236
 237         tries = 0;
 238
 239         do
 240         {
 241          /*
 242           * Get the current time of day...
 243           */
 244
 245           gettimeofday(&curtime, NULL);
 246
 247          /*
 248           * Format a string using the hex time values...
 249           */
 250
 251           snprintf(buffer, bufsize, "%s/%08lx%05lx", tmpdir,
 252                    (unsigned long)curtime.tv_sec,
 253                    (unsigned long)curtime.tv_usec);
 254
 255          /*
 256           * Try to make a symlink...
 257           */
 258
 259           if (!symlink(ppdname, buffer))
 260             break;
 261
 262           tries ++;
 263         }
 264         while (tries < 1000);
 265
 266         if (tries >= 1000)
 267         {
 268           _cupsSetError(IPP_STATUS_ERROR_INTERNAL, NULL, 0);
 269
 270           return (HTTP_STATUS_SERVER_ERROR);
 271         }
 272       }
 273
 274       if (*modtime >= ppdinfo.st_mtime)
 275         return (HTTP_STATUS_NOT_MODIFIED);
 276       else
 277       {
 278         *modtime = ppdinfo.st_mtime;
 279         return (HTTP_STATUS_OK);
 280       }
 281     }
 282   }
 283 #endif /* !WIN32 */
 284
 285  /*
 286   * Try finding a printer URI for this printer...
 287   */
 288
 289   if (!http)
 290     if ((http = _cupsConnect()) == NULL)
 291       return (HTTP_STATUS_SERVICE_UNAVAILABLE);
 292
 293   if (!cups_get_printer_uri(http, name, hostname, sizeof(hostname), &port,
 294                             resource, sizeof(resource), 0))
 295     return (HTTP_STATUS_NOT_FOUND);
 296
 297   DEBUG_printf(("2cupsGetPPD3: Printer hostname=\"%s\", port=%d", hostname,
 298                 port));
 299
 300   if (cupsServer()[0] == '/' && !_cups_strcasecmp(hostname, "localhost") && port == ippPort())
 301   {
 302    /*
 303     * Redirect localhost to domain socket...
 304     */
 305
 306     strlcpy(hostname, cupsServer(), sizeof(hostname));
 307     port = 0;
 308
 309     DEBUG_printf(("2cupsGetPPD3: Redirecting to \"%s\".", hostname));
 310   }
 311
 312  /*
 313   * Remap local hostname to localhost...
 314   */
 315
 316   httpGetHostname(NULL, localhost, sizeof(localhost));
 317
 318   DEBUG_printf(("2cupsGetPPD3: Local hostname=\"%s\"", localhost));
 319
 320   if (!_cups_strcasecmp(localhost, hostname))
 321     strlcpy(hostname, "localhost", sizeof(hostname));
 322
 323  /*
 324   * Get the hostname and port number we are connected to...
 325   */
 326
 327   httpGetHostname(http, http_hostname, sizeof(http_hostname));
 328   http_port = httpAddrPort(http->hostaddr);
 329
 330   DEBUG_printf(("2cupsGetPPD3: Connection hostname=\"%s\", port=%d",
 331                 http_hostname, http_port));
 332
 333  /*
 334   * Reconnect to the correct server as needed...
 335   */
 336
 337   if (!_cups_strcasecmp(http_hostname, hostname) && port == http_port)
 338     http2 = http;
 339   else if ((http2 = httpConnect2(hostname, port, NULL, AF_UNSPEC,
 340                                  cupsEncryption(), 1, 30000, NULL)) == NULL)
 341   {
 342     DEBUG_puts("1cupsGetPPD3: Unable to connect to server");
 343
 344     return (HTTP_STATUS_SERVICE_UNAVAILABLE);
 345   }
 346
 347  /*
 348   * Get a temp file...
 349   */
 350
 351   if (buffer[0])
 352     fd = open(buffer, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 353   else
 354     fd = cupsTempFd(tempfile, sizeof(tempfile));
 355
 356   if (fd < 0)
 357   {
 358    /*
 359     * Can't open file; close the server connection and return NULL...
 360     */
 361
 362     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, NULL, 0);
 363
 364     if (http2 != http)
 365       httpClose(http2);
 366
 367     return (HTTP_STATUS_SERVER_ERROR);
 368   }
 369
 370  /*
 371   * And send a request to the HTTP server...
 372   */
 373
 374   strlcat(resource, ".ppd", sizeof(resource));
 375
 376   if (*modtime > 0)
 377     httpSetField(http2, HTTP_FIELD_IF_MODIFIED_SINCE,
 378                  httpGetDateString(*modtime));
 379
 380   status = cupsGetFd(http2, resource, fd);
 381
 382   close(fd);
 383
 384  /*
 385   * See if we actually got the file or an error...
 386   */
 387
 388   if (status == HTTP_STATUS_OK)
 389   {
 390     *modtime = httpGetDateTime(httpGetField(http2, HTTP_FIELD_DATE));
 391
 392     if (tempfile[0])
 393       strlcpy(buffer, tempfile, bufsize);
 394   }
 395   else if (status != HTTP_STATUS_NOT_MODIFIED)
 396   {
 397     _cupsSetHTTPError(status);
 398
 399     if (buffer[0])
 400       unlink(buffer);
 401     else if (tempfile[0])
 402       unlink(tempfile);
 403   }
 404   else if (tempfile[0])
 405     unlink(tempfile);
 406
 407   if (http2 != http)
 408     httpClose(http2);
 409
 410  /*
 411   * Return the PPD file...
 412   */
 413
 414   DEBUG_printf(("1cupsGetPPD3: Returning status %d", status));
 415
 416   return (status);
 417 }
 418
 419
 420 /*
 421  * 'cupsGetServerPPD()' - Get an available PPD file from the server.
 422  *
 423  * This function returns the named PPD file from the server.  The
 424  * list of available PPDs is provided by the IPP @code CUPS_GET_PPDS@
 425  * operation.
 426  *
 427  * You must remove (unlink) the PPD file when you are finished with
 428  * it. The PPD filename is stored in a static location that will be
 429  * overwritten on the next call to @link cupsGetPPD@, @link cupsGetPPD2@,
 430  * or @link cupsGetServerPPD@.
 431  *
 432  * @since CUPS 1.3/macOS 10.5@
 433  */
 434
 435 char *                                  /* O - Name of PPD file or @code NULL@ on error */
 436 cupsGetServerPPD(http_t     *http,      /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 437                  const char *name)      /* I - Name of PPD file ("ppd-name") */
 438 {
 439   int                   fd;             /* PPD file descriptor */
 440   ipp_t                 *request;       /* IPP request */
 441   _ppd_globals_t        *pg = _ppdGlobals();
 442                                         /* Pointer to library globals */
 443
 444
 445  /*
 446   * Range check input...
 447   */
 448
 449   if (!name)
 450   {
 451     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No PPD name"), 1);
 452
 453     return (NULL);
 454   }
 455
 456   if (!http)
 457     if ((http = _cupsConnect()) == NULL)
 458       return (NULL);
 459
 460  /*
 461   * Get a temp file...
 462   */
 463
 464   if ((fd = cupsTempFd(pg->ppd_filename, sizeof(pg->ppd_filename))) < 0)
 465   {
 466    /*
 467     * Can't open file; close the server connection and return NULL...
 468     */
 469
 470     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, NULL, 0);
 471
 472     return (NULL);
 473   }
 474
 475  /*
 476   * Get the PPD file...
 477   */
 478
 479   request = ippNewRequest(IPP_OP_CUPS_GET_PPD);
 480   ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME, "ppd-name", NULL,
 481                name);
 482
 483   ippDelete(cupsDoIORequest(http, request, "/", -1, fd));
 484
 485   close(fd);
 486
 487   if (cupsLastError() != IPP_STATUS_OK)
 488   {
 489     unlink(pg->ppd_filename);
 490     return (NULL);
 491   }
 492   else
 493     return (pg->ppd_filename);
 494 }
 495
 496
 497 /*
 498  * 'cups_get_printer_uri()' - Get the printer-uri-supported attribute for the
 499  *                            first printer in a class.
 500  */
 501
 502 static int                              /* O - 1 on success, 0 on failure */
 503 cups_get_printer_uri(
 504     http_t     *http,                   /* I - Connection to server */
 505     const char *name,                   /* I - Name of printer or class */
 506     char       *host,                   /* I - Hostname buffer */
 507     int        hostsize,                /* I - Size of hostname buffer */
 508     int        *port,                   /* O - Port number */
 509     char       *resource,               /* I - Resource buffer */
 510     int        resourcesize,            /* I - Size of resource buffer */
 511     int        depth)                   /* I - Depth of query */
 512 {
 513   int           i;                      /* Looping var */
 514   int           http_port;              /* Port number */
 515   http_t        *http2;                 /* Alternate HTTP connection */
 516   ipp_t         *request,               /* IPP request */
 517                 *response;              /* IPP response */
 518   ipp_attribute_t *attr;                /* Current attribute */
 519   char          uri[HTTP_MAX_URI],      /* printer-uri attribute */
 520                 scheme[HTTP_MAX_URI],   /* Scheme name */
 521                 username[HTTP_MAX_URI], /* Username:password */
 522                 classname[255],         /* Temporary class name */
 523                 http_hostname[HTTP_MAX_HOST];
 524                                         /* Hostname associated with connection */
 525   static const char * const requested_attrs[] =
 526                 {                       /* Requested attributes */
 527                   "device-uri",
 528                   "member-uris",
 529                   "printer-uri-supported",
 530                   "printer-type"
 531                 };
 532
 533
 534   DEBUG_printf(("4cups_get_printer_uri(http=%p, name=\"%s\", host=%p, hostsize=%d, resource=%p, resourcesize=%d, depth=%d)", http, name, host, hostsize, resource, resourcesize, depth));
 535
 536  /*
 537   * Setup the printer URI...
 538   */
 539
 540   if (httpAssembleURIf(HTTP_URI_CODING_ALL, uri, sizeof(uri), "ipp", NULL, "localhost", 0, "/printers/%s", name) < HTTP_URI_STATUS_OK)
 541   {
 542     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unable to create printer-uri"), 1);
 543
 544     *host     = '\0';
 545     *resource = '\0';
 546
 547     return (0);
 548   }
 549
 550   DEBUG_printf(("5cups_get_printer_uri: printer-uri=\"%s\"", uri));
 551
 552  /*
 553   * Get the hostname and port number we are connected to...
 554   */
 555
 556   httpGetHostname(http, http_hostname, sizeof(http_hostname));
 557   http_port = httpAddrPort(http->hostaddr);
 558
 559   DEBUG_printf(("5cups_get_printer_uri: http_hostname=\"%s\"", http_hostname));
 560
 561  /*
 562   * Build an IPP_GET_PRINTER_ATTRIBUTES request, which requires the following
 563   * attributes:
 564   *
 565   *    attributes-charset
 566   *    attributes-natural-language
 567   *    printer-uri
 568   *    requested-attributes
 569   */
 570
 571   request = ippNewRequest(IPP_OP_GET_PRINTER_ATTRIBUTES);
 572
 573   ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri", NULL, uri);
 574
 575   ippAddStrings(request, IPP_TAG_OPERATION, IPP_TAG_KEYWORD, "requested-attributes", sizeof(requested_attrs) / sizeof(requested_attrs[0]), NULL, requested_attrs);
 576
 577  /*
 578   * Do the request and get back a response...
 579   */
 580
 581   snprintf(resource, (size_t)resourcesize, "/printers/%s", name);
 582
 583   if ((response = cupsDoRequest(http, request, resource)) != NULL)
 584   {
 585     const char *device_uri = NULL;      /* device-uri value */
 586
 587     if ((attr = ippFindAttribute(response, "device-uri", IPP_TAG_URI)) != NULL)
 588     {
 589       device_uri = attr->values[0].string.text;
 590       DEBUG_printf(("5cups_get_printer_uri: device-uri=\"%s\"", device_uri));
 591     }
 592
 593     if (device_uri &&
 594         (((!strncmp(device_uri, "ipp://", 6) || !strncmp(device_uri, "ipps://", 7)) &&
 595           (strstr(device_uri, "/printers/") != NULL || strstr(device_uri, "/classes/") != NULL)) ||
 596          ((strstr(device_uri, "._ipp.") != NULL || strstr(device_uri, "._ipps.") != NULL) &&
 597           !strcmp(device_uri + strlen(device_uri) - 5, "/cups"))))
 598     {
 599      /*
 600       * Statically-configured shared printer.
 601       */
 602
 603       httpSeparateURI(HTTP_URI_CODING_ALL, _httpResolveURI(device_uri, uri, sizeof(uri), _HTTP_RESOLVE_DEFAULT, NULL, NULL), scheme, sizeof(scheme), username, sizeof(username), host, hostsize, port, resource, resourcesize);
 604       ippDelete(response);
 605
 606       DEBUG_printf(("5cups_get_printer_uri: Resolved to host=\"%s\", port=%d, resource=\"%s\"", host, *port, resource));
 607       return (1);
 608     }
 609     else if ((attr = ippFindAttribute(response, "member-uris", IPP_TAG_URI)) != NULL)
 610     {
 611      /*
 612       * Get the first actual printer name in the class...
 613       */
 614
 615       DEBUG_printf(("5cups_get_printer_uri: Got member-uris with %d values.", ippGetCount(attr)));
 616
 617       for (i = 0; i < attr->num_values; i ++)
 618       {
 619         DEBUG_printf(("5cups_get_printer_uri: member-uris[%d]=\"%s\"", i, ippGetString(attr, i, NULL)));
 620
 621         httpSeparateURI(HTTP_URI_CODING_ALL, attr->values[i].string.text, scheme, sizeof(scheme), username, sizeof(username), host, hostsize, port, resource, resourcesize);
 622         if (!strncmp(resource, "/printers/", 10))
 623         {
 624          /*
 625           * Found a printer!
 626           */
 627
 628           ippDelete(response);
 629
 630           DEBUG_printf(("5cups_get_printer_uri: Found printer member with host=\"%s\", port=%d, resource=\"%s\"", host, *port, resource));
 631           return (1);
 632         }
 633       }
 634
 635      /*
 636       * No printers in this class - try recursively looking for a printer,
 637       * but not more than 3 levels deep...
 638       */
 639
 640       if (depth < 3)
 641       {
 642         for (i = 0; i < attr->num_values; i ++)
 643         {
 644           httpSeparateURI(HTTP_URI_CODING_ALL, attr->values[i].string.text,
 645                           scheme, sizeof(scheme), username, sizeof(username),
 646                           host, hostsize, port, resource, resourcesize);
 647           if (!strncmp(resource, "/classes/", 9))
 648           {
 649            /*
 650             * Found a class!  Connect to the right server...
 651             */
 652
 653             if (!_cups_strcasecmp(http_hostname, host) && *port == http_port)
 654               http2 = http;
 655             else if ((http2 = httpConnect2(host, *port, NULL, AF_UNSPEC, cupsEncryption(), 1, 30000, NULL)) == NULL)
 656             {
 657               DEBUG_puts("8cups_get_printer_uri: Unable to connect to server");
 658
 659               continue;
 660             }
 661
 662            /*
 663             * Look up printers on that server...
 664             */
 665
 666             strlcpy(classname, resource + 9, sizeof(classname));
 667
 668             cups_get_printer_uri(http2, classname, host, hostsize, port,
 669                                  resource, resourcesize, depth + 1);
 670
 671            /*
 672             * Close the connection as needed...
 673             */
 674
 675             if (http2 != http)
 676               httpClose(http2);
 677
 678             if (*host)
 679               return (1);
 680           }
 681         }
 682       }
 683     }
 684     else if ((attr = ippFindAttribute(response, "printer-uri-supported", IPP_TAG_URI)) != NULL)
 685     {
 686       httpSeparateURI(HTTP_URI_CODING_ALL, _httpResolveURI(attr->values[0].string.text, uri, sizeof(uri), _HTTP_RESOLVE_DEFAULT, NULL, NULL), scheme, sizeof(scheme), username, sizeof(username), host, hostsize, port, resource, resourcesize);
 687       ippDelete(response);
 688
 689       DEBUG_printf(("5cups_get_printer_uri: Resolved to host=\"%s\", port=%d, resource=\"%s\"", host, *port, resource));
 690
 691       if (!strncmp(resource, "/classes/", 9))
 692       {
 693         _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No printer-uri found for class"), 1);
 694
 695         *host     = '\0';
 696         *resource = '\0';
 697
 698         DEBUG_puts("5cups_get_printer_uri: Not returning class.");
 699         return (0);
 700       }
 701
 702       return (1);
 703     }
 704
 705     ippDelete(response);
 706   }
 707
 708   if (cupsLastError() != IPP_STATUS_ERROR_NOT_FOUND)
 709     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No printer-uri found"), 1);
 710
 711   *host     = '\0';
 712   *resource = '\0';
 713
 714   DEBUG_puts("5cups_get_printer_uri: Printer URI not found.");
 715   return (0);
 716 }