cups/request.c

   1 /*
   2  * "$Id$"
   3  *
   4  * IPP utilities for CUPS.
   5  *
   6  * Copyright 2007-2014 by Apple Inc.
   7  * Copyright 1997-2007 by Easy Software Products.
   8  *
   9  * These coded instructions, statements, and computer programs are the
  10  * property of Apple Inc. and are protected by Federal copyright
  11  * law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  12  * which should have been included with this file.  If this file is
  13  * file is missing or damaged, see the license at "http://www.cups.org/".
  14  *
  15  * This file is subject to the Apple OS-Developed Software exception.
  16  */
  17
  18 /*
  19  * Include necessary headers...
  20  */
  21
  22 #include "cups-private.h"
  23 #include <fcntl.h>
  24 #include <sys/stat.h>
  25 #if defined(WIN32) || defined(__EMX__)
  26 #  include <io.h>
  27 #else
  28 #  include <unistd.h>
  29 #endif /* WIN32 || __EMX__ */
  30 #ifndef O_BINARY
  31 #  define O_BINARY 0
  32 #endif /* O_BINARY */
  33 #ifndef MSG_DONTWAIT
  34 #  define MSG_DONTWAIT 0
  35 #endif /* !MSG_DONTWAIT */
  36
  37
  38 /*
  39  * 'cupsDoFileRequest()' - Do an IPP request with a file.
  40  *
  41  * This function sends the IPP request and attached file to the specified
  42  * server, retrying and authenticating as necessary.  The request is freed with
  43  * @link ippDelete@.
  44  */
  45
  46 ipp_t *                                 /* O - Response data */
  47 cupsDoFileRequest(http_t     *http,     /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
  48                   ipp_t      *request,  /* I - IPP request */
  49                   const char *resource, /* I - HTTP resource for POST */
  50                   const char *filename) /* I - File to send or @code NULL@ for none */
  51 {
  52   ipp_t         *response;              /* IPP response data */
  53   int           infile;                 /* Input file */
  54
  55
  56   DEBUG_printf(("cupsDoFileRequest(http=%p, request=%p(%s), resource=\"%s\", "
  57                 "filename=\"%s\")", http, request,
  58                 request ? ippOpString(request->request.op.operation_id) : "?",
  59                 resource, filename));
  60
  61   if (filename)
  62   {
  63     if ((infile = open(filename, O_RDONLY | O_BINARY)) < 0)
  64     {
  65      /*
  66       * Can't get file information!
  67       */
  68
  69       _cupsSetError(errno == ENOENT ? IPP_STATUS_ERROR_NOT_FOUND : IPP_STATUS_ERROR_NOT_AUTHORIZED,
  70                     NULL, 0);
  71
  72       ippDelete(request);
  73
  74       return (NULL);
  75     }
  76   }
  77   else
  78     infile = -1;
  79
  80   response = cupsDoIORequest(http, request, resource, infile, -1);
  81
  82   if (infile >= 0)
  83     close(infile);
  84
  85   return (response);
  86 }
  87
  88
  89 /*
  90  * 'cupsDoIORequest()' - Do an IPP request with file descriptors.
  91  *
  92  * This function sends the IPP request with the optional input file "infile" to
  93  * the specified server, retrying and authenticating as necessary.  The request
  94  * is freed with @link ippDelete@.
  95  *
  96  * If "infile" is a valid file descriptor, @code cupsDoIORequest@ copies
  97  * all of the data from the file after the IPP request message.
  98  *
  99  * If "outfile" is a valid file descriptor, @code cupsDoIORequest@ copies
 100  * all of the data after the IPP response message to the file.
 101  *
 102  * @since CUPS 1.3/OS X 10.5@
 103  */
 104
 105 ipp_t *                                 /* O - Response data */
 106 cupsDoIORequest(http_t     *http,       /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 107                 ipp_t      *request,    /* I - IPP request */
 108                 const char *resource,   /* I - HTTP resource for POST */
 109                 int        infile,      /* I - File to read from or -1 for none */
 110                 int        outfile)     /* I - File to write to or -1 for none */
 111 {
 112   ipp_t         *response = NULL;       /* IPP response data */
 113   size_t        length = 0;             /* Content-Length value */
 114   http_status_t status;                 /* Status of HTTP request */
 115   struct stat   fileinfo;               /* File information */
 116   ssize_t       bytes;                  /* Number of bytes read/written */
 117   char          buffer[32768];          /* Output buffer */
 118
 119
 120   DEBUG_printf(("cupsDoIORequest(http=%p, request=%p(%s), resource=\"%s\", "
 121                 "infile=%d, outfile=%d)", http, request,
 122                 request ? ippOpString(request->request.op.operation_id) : "?",
 123                 resource, infile, outfile));
 124
 125  /*
 126   * Range check input...
 127   */
 128
 129   if (!request || !resource)
 130   {
 131     ippDelete(request);
 132
 133     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0);
 134
 135     return (NULL);
 136   }
 137
 138  /*
 139   * Get the default connection as needed...
 140   */
 141
 142   if (!http)
 143     if ((http = _cupsConnect()) == NULL)
 144     {
 145       ippDelete(request);
 146
 147       return (NULL);
 148     }
 149
 150  /*
 151   * See if we have a file to send...
 152   */
 153
 154   if (infile >= 0)
 155   {
 156     if (fstat(infile, &fileinfo))
 157     {
 158      /*
 159       * Can't get file information!
 160       */
 161
 162       _cupsSetError(errno == EBADF ? IPP_STATUS_ERROR_NOT_FOUND : IPP_STATUS_ERROR_NOT_AUTHORIZED,
 163                     NULL, 0);
 164
 165       ippDelete(request);
 166
 167       return (NULL);
 168     }
 169
 170 #ifdef WIN32
 171     if (fileinfo.st_mode & _S_IFDIR)
 172 #else
 173     if (S_ISDIR(fileinfo.st_mode))
 174 #endif /* WIN32 */
 175     {
 176      /*
 177       * Can't send a directory...
 178       */
 179
 180       ippDelete(request);
 181
 182       _cupsSetError(IPP_STATUS_ERROR_NOT_POSSIBLE, strerror(EISDIR), 0);
 183
 184       return (NULL);
 185     }
 186
 187 #ifndef WIN32
 188     if (!S_ISREG(fileinfo.st_mode))
 189       length = 0;                       /* Chunk when piping */
 190     else
 191 #endif /* !WIN32 */
 192     length = ippLength(request) + (size_t)fileinfo.st_size;
 193   }
 194   else
 195     length = ippLength(request);
 196
 197   DEBUG_printf(("2cupsDoIORequest: Request length=%ld, total length=%ld",
 198                 (long)ippLength(request), (long)length));
 199
 200  /*
 201   * Clear any "Local" authentication data since it is probably stale...
 202   */
 203
 204   if (http->authstring && !strncmp(http->authstring, "Local ", 6))
 205     httpSetAuthString(http, NULL, NULL);
 206
 207  /*
 208   * Loop until we can send the request without authorization problems.
 209   */
 210
 211   while (response == NULL)
 212   {
 213     DEBUG_puts("2cupsDoIORequest: setup...");
 214
 215    /*
 216     * Send the request...
 217     */
 218
 219     status = cupsSendRequest(http, request, resource, length);
 220
 221     DEBUG_printf(("2cupsDoIORequest: status=%d", status));
 222
 223     if (status == HTTP_STATUS_CONTINUE && request->state == IPP_STATE_DATA && infile >= 0)
 224     {
 225       DEBUG_puts("2cupsDoIORequest: file write...");
 226
 227      /*
 228       * Send the file with the request...
 229       */
 230
 231 #ifndef WIN32
 232       if (S_ISREG(fileinfo.st_mode))
 233 #endif /* WIN32 */
 234       lseek(infile, 0, SEEK_SET);
 235
 236       while ((bytes = read(infile, buffer, sizeof(buffer))) > 0)
 237       {
 238         if ((status = cupsWriteRequestData(http, buffer, (size_t)bytes))
 239                 != HTTP_STATUS_CONTINUE)
 240           break;
 241       }
 242     }
 243
 244    /*
 245     * Get the server's response...
 246     */
 247
 248     if (status <= HTTP_STATUS_CONTINUE)
 249     {
 250       response = cupsGetResponse(http, resource);
 251       status   = httpGetStatus(http);
 252     }
 253
 254     DEBUG_printf(("2cupsDoIORequest: status=%d", status));
 255
 256     if (status == HTTP_STATUS_ERROR ||
 257         (status >= HTTP_STATUS_BAD_REQUEST && status != HTTP_STATUS_UNAUTHORIZED &&
 258          status != HTTP_STATUS_UPGRADE_REQUIRED))
 259     {
 260       _cupsSetHTTPError(status);
 261       break;
 262     }
 263
 264     if (response && outfile >= 0)
 265     {
 266      /*
 267       * Write trailing data to file...
 268       */
 269
 270       while ((bytes = httpRead2(http, buffer, sizeof(buffer))) > 0)
 271         if (write(outfile, buffer, (size_t)bytes) < bytes)
 272           break;
 273     }
 274
 275     if (http->state != HTTP_STATE_WAITING)
 276     {
 277      /*
 278       * Flush any remaining data...
 279       */
 280
 281       httpFlush(http);
 282     }
 283   }
 284
 285  /*
 286   * Delete the original request and return the response...
 287   */
 288
 289   ippDelete(request);
 290
 291   return (response);
 292 }
 293
 294
 295 /*
 296  * 'cupsDoRequest()' - Do an IPP request.
 297  *
 298  * This function sends the IPP request to the specified server, retrying
 299  * and authenticating as necessary.  The request is freed with @link ippDelete@.
 300  */
 301
 302 ipp_t *                                 /* O - Response data */
 303 cupsDoRequest(http_t     *http,         /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 304               ipp_t      *request,      /* I - IPP request */
 305               const char *resource)     /* I - HTTP resource for POST */
 306 {
 307   DEBUG_printf(("cupsDoRequest(http=%p, request=%p(%s), resource=\"%s\")",
 308                 http, request,
 309                 request ? ippOpString(request->request.op.operation_id) : "?",
 310                 resource));
 311
 312   return (cupsDoIORequest(http, request, resource, -1, -1));
 313 }
 314
 315
 316 /*
 317  * 'cupsGetResponse()' - Get a response to an IPP request.
 318  *
 319  * Use this function to get the response for an IPP request sent using
 320  * @link cupsSendRequest@. For requests that return additional data, use
 321  * @link cupsReadResponseData@ after getting a successful response,
 322  * otherwise call @link httpFlush@ to complete the response processing.
 323  *
 324  * @since CUPS 1.4/OS X 10.6@
 325  */
 326
 327 ipp_t *                                 /* O - Response or @code NULL@ on HTTP error */
 328 cupsGetResponse(http_t     *http,       /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 329                 const char *resource)   /* I - HTTP resource for POST */
 330 {
 331   http_status_t status;                 /* HTTP status */
 332   ipp_state_t   state;                  /* IPP read state */
 333   ipp_t         *response = NULL;       /* IPP response */
 334
 335
 336   DEBUG_printf(("cupsGetResponse(http=%p, resource=\"%s\")", http, resource));
 337
 338  /*
 339   * Connect to the default server as needed...
 340   */
 341
 342   if (!http)
 343     http = _cupsConnect();
 344
 345   if (!http || (http->state != HTTP_STATE_POST_RECV &&
 346                 http->state != HTTP_STATE_POST_SEND))
 347     return (NULL);
 348
 349  /*
 350   * Check for an unfinished chunked request...
 351   */
 352
 353   if (http->data_encoding == HTTP_ENCODING_CHUNKED)
 354   {
 355    /*
 356     * Send a 0-length chunk to finish off the request...
 357     */
 358
 359     DEBUG_puts("2cupsGetResponse: Finishing chunked POST...");
 360
 361     if (httpWrite2(http, "", 0) < 0)
 362       return (NULL);
 363   }
 364
 365  /*
 366   * Wait for a response from the server...
 367   */
 368
 369   DEBUG_printf(("2cupsGetResponse: Update loop, http->status=%d...",
 370                 http->status));
 371
 372   do
 373   {
 374     status = httpUpdate(http);
 375   }
 376   while (status == HTTP_STATUS_CONTINUE);
 377
 378   DEBUG_printf(("2cupsGetResponse: status=%d", status));
 379
 380   if (status == HTTP_STATUS_OK)
 381   {
 382    /*
 383     * Get the IPP response...
 384     */
 385
 386     response = ippNew();
 387
 388     while ((state = ippRead(http, response)) != IPP_STATE_DATA)
 389       if (state == IPP_STATE_ERROR)
 390         break;
 391
 392     if (state == IPP_STATE_ERROR)
 393     {
 394      /*
 395       * Flush remaining data and delete the response...
 396       */
 397
 398       DEBUG_puts("1cupsGetResponse: IPP read error!");
 399
 400       httpFlush(http);
 401
 402       ippDelete(response);
 403       response = NULL;
 404
 405       http->status = status = HTTP_STATUS_ERROR;
 406       http->error  = EINVAL;
 407     }
 408   }
 409   else if (status != HTTP_STATUS_ERROR)
 410   {
 411    /*
 412     * Flush any error message...
 413     */
 414
 415     httpFlush(http);
 416
 417    /*
 418     * Then handle encryption and authentication...
 419     */
 420
 421     if (status == HTTP_STATUS_UNAUTHORIZED)
 422     {
 423      /*
 424       * See if we can do authentication...
 425       */
 426
 427       DEBUG_puts("2cupsGetResponse: Need authorization...");
 428
 429       if (!cupsDoAuthentication(http, "POST", resource))
 430         httpReconnect2(http, 30000, NULL);
 431       else
 432         http->status = status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
 433     }
 434
 435 #ifdef HAVE_SSL
 436     else if (status == HTTP_STATUS_UPGRADE_REQUIRED)
 437     {
 438      /*
 439       * Force a reconnect with encryption...
 440       */
 441
 442       DEBUG_puts("2cupsGetResponse: Need encryption...");
 443
 444       if (!httpReconnect2(http, 30000, NULL))
 445         httpEncryption(http, HTTP_ENCRYPTION_REQUIRED);
 446     }
 447 #endif /* HAVE_SSL */
 448   }
 449
 450   if (response)
 451   {
 452     ipp_attribute_t     *attr;          /* status-message attribute */
 453
 454
 455     attr = ippFindAttribute(response, "status-message", IPP_TAG_TEXT);
 456
 457     DEBUG_printf(("1cupsGetResponse: status-code=%s, status-message=\"%s\"",
 458                   ippErrorString(response->request.status.status_code),
 459                   attr ? attr->values[0].string.text : ""));
 460
 461     _cupsSetError(response->request.status.status_code,
 462                   attr ? attr->values[0].string.text :
 463                       ippErrorString(response->request.status.status_code), 0);
 464   }
 465
 466   return (response);
 467 }
 468
 469
 470 /*
 471  * 'cupsLastError()' - Return the last IPP status code received on the current
 472  *                     thread.
 473  */
 474
 475 ipp_status_t                            /* O - IPP status code from last request */
 476 cupsLastError(void)
 477 {
 478   return (_cupsGlobals()->last_error);
 479 }
 480
 481
 482 /*
 483  * 'cupsLastErrorString()' - Return the last IPP status-message received on the
 484  *                           current thread.
 485  *
 486  * @since CUPS 1.2/OS X 10.5@
 487  */
 488
 489 const char *                            /* O - status-message text from last request */
 490 cupsLastErrorString(void)
 491 {
 492   return (_cupsGlobals()->last_status_message);
 493 }
 494
 495
 496 /*
 497  * '_cupsNextDelay()' - Return the next retry delay value.
 498  *
 499  * This function currently returns the Fibonacci sequence 1 1 2 3 5 8.
 500  *
 501  * Pass 0 for the current delay value to initialize the sequence.
 502  */
 503
 504 int                                     /* O  - Next delay value */
 505 _cupsNextDelay(int current,             /* I  - Current delay value or 0 */
 506                int *previous)           /* IO - Previous delay value */
 507 {
 508   int   next;                           /* Next delay value */
 509
 510
 511   if (current > 0)
 512   {
 513     next      = (current + *previous) % 12;
 514     *previous = next < current ? 0 : current;
 515   }
 516   else
 517   {
 518     next      = 1;
 519     *previous = 0;
 520   }
 521
 522   return (next);
 523 }
 524
 525
 526 /*
 527  * 'cupsReadResponseData()' - Read additional data after the IPP response.
 528  *
 529  * This function is used after @link cupsGetResponse@ to read the PPD or document
 530  * files from @code CUPS_GET_PPD@ and @code CUPS_GET_DOCUMENT@ requests,
 531  * respectively.
 532  *
 533  * @since CUPS 1.4/OS X 10.6@
 534  */
 535
 536 ssize_t                                 /* O - Bytes read, 0 on EOF, -1 on error */
 537 cupsReadResponseData(
 538     http_t *http,                       /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 539     char   *buffer,                     /* I - Buffer to use */
 540     size_t length)                      /* I - Number of bytes to read */
 541 {
 542  /*
 543   * Get the default connection as needed...
 544   */
 545
 546   DEBUG_printf(("cupsReadResponseData(http=%p, buffer=%p, "
 547                 "length=" CUPS_LLFMT ")", http, buffer, CUPS_LLCAST length));
 548
 549   if (!http)
 550   {
 551     _cups_globals_t *cg = _cupsGlobals();
 552                                         /* Pointer to library globals */
 553
 554     if ((http = cg->http) == NULL)
 555     {
 556       _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No active connection"), 1);
 557       return (-1);
 558     }
 559   }
 560
 561  /*
 562   * Then read from the HTTP connection...
 563   */
 564
 565   return (httpRead2(http, buffer, length));
 566 }
 567
 568
 569 /*
 570  * 'cupsSendRequest()' - Send an IPP request.
 571  *
 572  * Use @link cupsWriteRequestData@ to write any additional data (document, PPD
 573  * file, etc.) for the request, @link cupsGetResponse@ to get the IPP response,
 574  * and @link cupsReadResponseData@ to read any additional data following the
 575  * response. Only one request can be sent/queued at a time per @code http_t@
 576  * connection.
 577  *
 578  * Returns the initial HTTP status code, which will be @code HTTP_STATUS_CONTINUE@
 579  * on a successful send of the request.
 580  *
 581  * Note: Unlike @link cupsDoFileRequest@, @link cupsDoIORequest@, and
 582  * @link cupsDoRequest@, the request is NOT freed with @link ippDelete@.
 583  *
 584  * @since CUPS 1.4/OS X 10.6@
 585  */
 586
 587 http_status_t                           /* O - Initial HTTP status */
 588 cupsSendRequest(http_t     *http,       /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 589                 ipp_t      *request,    /* I - IPP request */
 590                 const char *resource,   /* I - Resource path */
 591                 size_t     length)      /* I - Length of data to follow or @code CUPS_LENGTH_VARIABLE@ */
 592 {
 593   http_status_t         status;         /* Status of HTTP request */
 594   int                   got_status;     /* Did we get the status? */
 595   ipp_state_t           state;          /* State of IPP processing */
 596   http_status_t         expect;         /* Expect: header to use */
 597
 598
 599   DEBUG_printf(("cupsSendRequest(http=%p, request=%p(%s), resource=\"%s\", "
 600                 "length=" CUPS_LLFMT ")", http, request,
 601                 request ? ippOpString(request->request.op.operation_id) : "?",
 602                 resource, CUPS_LLCAST length));
 603
 604  /*
 605   * Range check input...
 606   */
 607
 608   if (!request || !resource)
 609   {
 610     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0);
 611
 612     return (HTTP_STATUS_ERROR);
 613   }
 614
 615  /*
 616   * Get the default connection as needed...
 617   */
 618
 619   if (!http)
 620     if ((http = _cupsConnect()) == NULL)
 621       return (HTTP_STATUS_SERVICE_UNAVAILABLE);
 622
 623  /*
 624   * If the prior request was not flushed out, do so now...
 625   */
 626
 627   if (http->state == HTTP_STATE_GET_SEND ||
 628       http->state == HTTP_STATE_POST_SEND)
 629   {
 630     DEBUG_puts("2cupsSendRequest: Flush prior response.");
 631     httpFlush(http);
 632   }
 633   else if (http->state != HTTP_STATE_WAITING)
 634   {
 635     DEBUG_printf(("1cupsSendRequest: Unknown HTTP state (%d), "
 636                   "reconnecting.", http->state));
 637     if (httpReconnect2(http, 30000, NULL))
 638       return (HTTP_STATUS_ERROR);
 639   }
 640
 641 #ifdef HAVE_SSL
 642  /*
 643   * See if we have an auth-info attribute and are communicating over
 644   * a non-local link.  If so, encrypt the link so that we can pass
 645   * the authentication information securely...
 646   */
 647
 648   if (ippFindAttribute(request, "auth-info", IPP_TAG_TEXT) &&
 649       !httpAddrLocalhost(http->hostaddr) && !http->tls &&
 650       httpEncryption(http, HTTP_ENCRYPTION_REQUIRED))
 651   {
 652     DEBUG_puts("1cupsSendRequest: Unable to encrypt connection.");
 653     return (HTTP_STATUS_SERVICE_UNAVAILABLE);
 654   }
 655 #endif /* HAVE_SSL */
 656
 657  /*
 658   * Reconnect if the last response had a "Connection: close"...
 659   */
 660
 661   if (!_cups_strcasecmp(http->fields[HTTP_FIELD_CONNECTION], "close"))
 662   {
 663     DEBUG_puts("2cupsSendRequest: Connection: close");
 664     httpClearFields(http);
 665     if (httpReconnect2(http, 30000, NULL))
 666     {
 667       DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
 668       return (HTTP_STATUS_SERVICE_UNAVAILABLE);
 669     }
 670   }
 671
 672  /*
 673   * Loop until we can send the request without authorization problems.
 674   */
 675
 676   expect = HTTP_STATUS_CONTINUE;
 677
 678   for (;;)
 679   {
 680     DEBUG_puts("2cupsSendRequest: Setup...");
 681
 682    /*
 683     * Setup the HTTP variables needed...
 684     */
 685
 686     httpClearFields(http);
 687     httpSetExpect(http, expect);
 688     httpSetField(http, HTTP_FIELD_CONTENT_TYPE, "application/ipp");
 689     httpSetLength(http, length);
 690
 691 #ifdef HAVE_GSSAPI
 692     if (http->authstring && !strncmp(http->authstring, "Negotiate", 9))
 693     {
 694      /*
 695       * Do not use cached Kerberos credentials since they will look like a
 696       * "replay" attack...
 697       */
 698
 699       _cupsSetNegotiateAuthString(http, "POST", resource);
 700     }
 701 #endif /* HAVE_GSSAPI */
 702
 703     httpSetField(http, HTTP_FIELD_AUTHORIZATION, http->authstring);
 704
 705     DEBUG_printf(("2cupsSendRequest: authstring=\"%s\"", http->authstring));
 706
 707    /*
 708     * Try the request...
 709     */
 710
 711     DEBUG_puts("2cupsSendRequest: Sending HTTP POST...");
 712
 713     if (httpPost(http, resource))
 714     {
 715       DEBUG_puts("2cupsSendRequest: POST failed, reconnecting.");
 716       if (httpReconnect2(http, 30000, NULL))
 717       {
 718         DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
 719         return (HTTP_STATUS_SERVICE_UNAVAILABLE);
 720       }
 721       else
 722         continue;
 723     }
 724
 725    /*
 726     * Send the IPP data...
 727     */
 728
 729     DEBUG_puts("2cupsSendRequest: Writing IPP request...");
 730
 731     request->state = IPP_STATE_IDLE;
 732     status         = HTTP_STATUS_CONTINUE;
 733     got_status     = 0;
 734
 735     while ((state = ippWrite(http, request)) != IPP_STATE_DATA)
 736       if (state == IPP_STATE_ERROR)
 737         break;
 738       else if (httpCheck(http))
 739       {
 740         got_status = 1;
 741
 742         _httpUpdate(http, &status);
 743         if (status >= HTTP_STATUS_MULTIPLE_CHOICES)
 744           break;
 745       }
 746
 747     if (state == IPP_STATE_ERROR)
 748     {
 749       DEBUG_puts("1cupsSendRequest: Unable to send IPP request.");
 750
 751       http->status = HTTP_STATUS_ERROR;
 752       http->state  = HTTP_STATE_WAITING;
 753
 754       return (HTTP_STATUS_ERROR);
 755     }
 756
 757    /*
 758     * Wait up to 1 second to get the 100-continue response as needed...
 759     */
 760
 761     if (!got_status)
 762     {
 763       if (expect == HTTP_STATUS_CONTINUE)
 764       {
 765         DEBUG_puts("2cupsSendRequest: Waiting for 100-continue...");
 766
 767         if (httpWait(http, 1000))
 768           _httpUpdate(http, &status);
 769       }
 770       else if (httpCheck(http))
 771         _httpUpdate(http, &status);
 772     }
 773
 774     DEBUG_printf(("2cupsSendRequest: status=%d", status));
 775
 776    /*
 777     * Process the current HTTP status...
 778     */
 779
 780     if (status >= HTTP_STATUS_MULTIPLE_CHOICES)
 781     {
 782       int temp_status;                  /* Temporary status */
 783
 784       _cupsSetHTTPError(status);
 785
 786       do
 787       {
 788         temp_status = httpUpdate(http);
 789       }
 790       while (temp_status != HTTP_STATUS_ERROR &&
 791              http->state == HTTP_STATE_POST_RECV);
 792
 793       httpFlush(http);
 794     }
 795
 796     switch (status)
 797     {
 798       case HTTP_STATUS_CONTINUE :
 799       case HTTP_STATUS_OK :
 800       case HTTP_STATUS_ERROR :
 801           DEBUG_printf(("1cupsSendRequest: Returning %d.", status));
 802           return (status);
 803
 804       case HTTP_STATUS_UNAUTHORIZED :
 805           if (cupsDoAuthentication(http, "POST", resource))
 806           {
 807             DEBUG_puts("1cupsSendRequest: Returning HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED.");
 808             return (HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED);
 809           }
 810
 811           DEBUG_puts("2cupsSendRequest: Reconnecting after HTTP_STATUS_UNAUTHORIZED.");
 812
 813           if (httpReconnect2(http, 30000, NULL))
 814           {
 815             DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
 816             return (HTTP_STATUS_SERVICE_UNAVAILABLE);
 817           }
 818           break;
 819
 820 #ifdef HAVE_SSL
 821       case HTTP_STATUS_UPGRADE_REQUIRED :
 822          /*
 823           * Flush any error message, reconnect, and then upgrade with
 824           * encryption...
 825           */
 826
 827           DEBUG_puts("2cupsSendRequest: Reconnecting after "
 828                      "HTTP_STATUS_UPGRADE_REQUIRED.");
 829
 830           if (httpReconnect2(http, 30000, NULL))
 831           {
 832             DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
 833             return (HTTP_STATUS_SERVICE_UNAVAILABLE);
 834           }
 835
 836           DEBUG_puts("2cupsSendRequest: Upgrading to TLS.");
 837           if (httpEncryption(http, HTTP_ENCRYPTION_REQUIRED))
 838           {
 839             DEBUG_puts("1cupsSendRequest: Unable to encrypt connection.");
 840             return (HTTP_STATUS_SERVICE_UNAVAILABLE);
 841           }
 842           break;
 843 #endif /* HAVE_SSL */
 844
 845       case HTTP_STATUS_EXPECTATION_FAILED :
 846          /*
 847           * Don't try using the Expect: header the next time around...
 848           */
 849
 850           expect = (http_status_t)0;
 851
 852           DEBUG_puts("2cupsSendRequest: Reconnecting after "
 853                      "HTTP_EXPECTATION_FAILED.");
 854
 855           if (httpReconnect2(http, 30000, NULL))
 856           {
 857             DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
 858             return (HTTP_STATUS_SERVICE_UNAVAILABLE);
 859           }
 860           break;
 861
 862       default :
 863          /*
 864           * Some other error...
 865           */
 866
 867           return (status);
 868     }
 869   }
 870 }
 871
 872
 873 /*
 874  * 'cupsWriteRequestData()' - Write additional data after an IPP request.
 875  *
 876  * This function is used after @link cupsSendRequest@ to provide a PPD and
 877  * after @link cupsStartDocument@ to provide a document file.
 878  *
 879  * @since CUPS 1.4/OS X 10.6@
 880  */
 881
 882 http_status_t                           /* O - @code HTTP_STATUS_CONTINUE@ if OK or HTTP status on error */
 883 cupsWriteRequestData(
 884     http_t     *http,                   /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 885     const char *buffer,                 /* I - Bytes to write */
 886     size_t     length)                  /* I - Number of bytes to write */
 887 {
 888   int   wused;                          /* Previous bytes in buffer */
 889
 890
 891  /*
 892   * Get the default connection as needed...
 893   */
 894
 895   DEBUG_printf(("cupsWriteRequestData(http=%p, buffer=%p, "
 896                 "length=" CUPS_LLFMT ")", http, buffer, CUPS_LLCAST length));
 897
 898   if (!http)
 899   {
 900     _cups_globals_t *cg = _cupsGlobals();
 901                                         /* Pointer to library globals */
 902
 903     if ((http = cg->http) == NULL)
 904     {
 905       _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No active connection"), 1);
 906       DEBUG_puts("1cupsWriteRequestData: Returning HTTP_STATUS_ERROR.");
 907       return (HTTP_STATUS_ERROR);
 908     }
 909   }
 910
 911  /*
 912   * Then write to the HTTP connection...
 913   */
 914
 915   wused = http->wused;
 916
 917   if (httpWrite2(http, buffer, length) < 0)
 918   {
 919     DEBUG_puts("1cupsWriteRequestData: Returning HTTP_STATUS_ERROR.");
 920     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(http->error), 0);
 921     return (HTTP_STATUS_ERROR);
 922   }
 923
 924  /*
 925   * Finally, check if we have any pending data from the server...
 926   */
 927
 928   if (length >= HTTP_MAX_BUFFER ||
 929       http->wused < wused ||
 930       (wused > 0 && (size_t)http->wused == length))
 931   {
 932    /*
 933     * We've written something to the server, so check for response data...
 934     */
 935
 936     if (_httpWait(http, 0, 1))
 937     {
 938       http_status_t     status;         /* Status from _httpUpdate */
 939
 940       _httpUpdate(http, &status);
 941       if (status >= HTTP_STATUS_MULTIPLE_CHOICES)
 942       {
 943         _cupsSetHTTPError(status);
 944
 945         do
 946         {
 947           status = httpUpdate(http);
 948         }
 949         while (status != HTTP_STATUS_ERROR && http->state == HTTP_STATE_POST_RECV);
 950
 951         httpFlush(http);
 952       }
 953
 954       DEBUG_printf(("1cupsWriteRequestData: Returning %d.\n", status));
 955       return (status);
 956     }
 957   }
 958
 959   DEBUG_puts("1cupsWriteRequestData: Returning HTTP_STATUS_CONTINUE.");
 960   return (HTTP_STATUS_CONTINUE);
 961 }
 962
 963
 964 /*
 965  * '_cupsConnect()' - Get the default server connection...
 966  */
 967
 968 http_t *                                /* O - HTTP connection */
 969 _cupsConnect(void)
 970 {
 971   _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */
 972
 973
 974  /*
 975   * See if we are connected to the same server...
 976   */
 977
 978   if (cg->http)
 979   {
 980    /*
 981     * Compare the connection hostname, port, and encryption settings to
 982     * the cached defaults; these were initialized the first time we
 983     * connected...
 984     */
 985
 986     if (strcmp(cg->http->hostname, cg->server) ||
 987         cg->ipp_port != httpAddrPort(cg->http->hostaddr) ||
 988         (cg->http->encryption != cg->encryption &&
 989          cg->http->encryption == HTTP_ENCRYPTION_NEVER))
 990     {
 991      /*
 992       * Need to close the current connection because something has changed...
 993       */
 994
 995       httpClose(cg->http);
 996       cg->http = NULL;
 997     }
 998     else
 999     {
1000      /*
1001       * Same server, see if the connection is still established...
1002       */
1003
1004       char      ch;                     /* Connection check byte */
1005       ssize_t   n;                      /* Number of bytes */
1006
1007 #ifdef WIN32
1008       if ((n = recv(cg->http->fd, &ch, 1, MSG_PEEK)) == 0 ||
1009           (n < 0 && WSAGetLastError() != WSAEWOULDBLOCK))
1010 #else
1011       if ((n = recv(cg->http->fd, &ch, 1, MSG_PEEK | MSG_DONTWAIT)) == 0 ||
1012           (n < 0 && errno != EWOULDBLOCK))
1013 #endif /* WIN32 */
1014       {
1015        /*
1016         * Nope, close the connection...
1017         */
1018
1019         httpClose(cg->http);
1020         cg->http = NULL;
1021       }
1022     }
1023   }
1024
1025  /*
1026   * (Re)connect as needed...
1027   */
1028
1029   if (!cg->http)
1030   {
1031     if ((cg->http = httpConnect2(cupsServer(), ippPort(), NULL, AF_UNSPEC,
1032                                  cupsEncryption(), 1, 30000, NULL)) == NULL)
1033     {
1034       if (errno)
1035         _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, NULL, 0);
1036       else
1037         _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE,
1038                       _("Unable to connect to host."), 1);
1039     }
1040   }
1041
1042  /*
1043   * Return the cached connection...
1044   */
1045
1046   return (cg->http);
1047 }
1048
1049
1050 /*
1051  * '_cupsSetError()' - Set the last IPP status code and status-message.
1052  */
1053
1054 void
1055 _cupsSetError(ipp_status_t status,      /* I - IPP status code */
1056               const char   *message,    /* I - status-message value */
1057               int          localize)    /* I - Localize the message? */
1058 {
1059   _cups_globals_t       *cg;            /* Global data */
1060
1061
1062   if (!message && errno)
1063   {
1064     message  = strerror(errno);
1065     localize = 0;
1066   }
1067
1068   cg             = _cupsGlobals();
1069   cg->last_error = status;
1070
1071   if (cg->last_status_message)
1072   {
1073     _cupsStrFree(cg->last_status_message);
1074
1075     cg->last_status_message = NULL;
1076   }
1077
1078   if (message)
1079   {
1080     if (localize)
1081     {
1082      /*
1083       * Get the message catalog...
1084       */
1085
1086       if (!cg->lang_default)
1087         cg->lang_default = cupsLangDefault();
1088
1089       cg->last_status_message = _cupsStrAlloc(_cupsLangString(cg->lang_default,
1090                                                               message));
1091     }
1092     else
1093       cg->last_status_message = _cupsStrAlloc(message);
1094   }
1095
1096   DEBUG_printf(("4_cupsSetError: last_error=%s, last_status_message=\"%s\"",
1097                 ippErrorString(cg->last_error), cg->last_status_message));
1098 }
1099
1100
1101 /*
1102  * '_cupsSetHTTPError()' - Set the last error using the HTTP status.
1103  */
1104
1105 void
1106 _cupsSetHTTPError(http_status_t status) /* I - HTTP status code */
1107 {
1108   switch (status)
1109   {
1110     case HTTP_STATUS_NOT_FOUND :
1111         _cupsSetError(IPP_STATUS_ERROR_NOT_FOUND, httpStatus(status), 0);
1112         break;
1113
1114     case HTTP_STATUS_UNAUTHORIZED :
1115         _cupsSetError(IPP_STATUS_ERROR_NOT_AUTHENTICATED, httpStatus(status), 0);
1116         break;
1117
1118     case HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED :
1119         _cupsSetError(IPP_STATUS_ERROR_CUPS_AUTHENTICATION_CANCELED, httpStatus(status), 0);
1120         break;
1121
1122     case HTTP_STATUS_FORBIDDEN :
1123         _cupsSetError(IPP_STATUS_ERROR_FORBIDDEN, httpStatus(status), 0);
1124         break;
1125
1126     case HTTP_STATUS_BAD_REQUEST :
1127         _cupsSetError(IPP_STATUS_ERROR_BAD_REQUEST, httpStatus(status), 0);
1128         break;
1129
1130     case HTTP_STATUS_REQUEST_TOO_LARGE :
1131         _cupsSetError(IPP_STATUS_ERROR_REQUEST_VALUE, httpStatus(status), 0);
1132         break;
1133
1134     case HTTP_STATUS_NOT_IMPLEMENTED :
1135         _cupsSetError(IPP_STATUS_ERROR_OPERATION_NOT_SUPPORTED, httpStatus(status), 0);
1136         break;
1137
1138     case HTTP_STATUS_NOT_SUPPORTED :
1139         _cupsSetError(IPP_STATUS_ERROR_VERSION_NOT_SUPPORTED, httpStatus(status), 0);
1140         break;
1141
1142     case HTTP_STATUS_UPGRADE_REQUIRED :
1143         _cupsSetError(IPP_STATUS_ERROR_CUPS_UPGRADE_REQUIRED, httpStatus(status), 0);
1144         break;
1145
1146     case HTTP_STATUS_CUPS_PKI_ERROR :
1147         _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, httpStatus(status), 0);
1148         break;
1149
1150     case HTTP_STATUS_ERROR :
1151         _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0);
1152         break;
1153
1154     default :
1155         DEBUG_printf(("4_cupsSetHTTPError: HTTP error %d mapped to "
1156                       "IPP_STATUS_ERROR_SERVICE_UNAVAILABLE!", status));
1157         _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, httpStatus(status), 0);
1158         break;
1159   }
1160 }
1161
1162
1163 /*
1164  * End of "$Id$".
1165  */