cups/request.c

   1 /*
   2  * "$Id: request.c 7946 2008-09-16 23:27:54Z mike $"
   3  *
   4  *   IPP utilities for CUPS.
   5  *
   6  *   Copyright 2007-2011 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  * Contents:
  18  *
  19  *   cupsDoFileRequest()    - Do an IPP request with a file.
  20  *   cupsDoIORequest()      - Do an IPP request with file descriptors.
  21  *   cupsDoRequest()        - Do an IPP request.
  22  *   cupsGetResponse()      - Get a response to an IPP request.
  23  *   cupsLastError()        - Return the last IPP status code.
  24  *   cupsLastErrorString()  - Return the last IPP status-message.
  25  *   _cupsNextDelay()       - Return the next retry delay value.
  26  *   cupsReadResponseData() - Read additional data after the IPP response.
  27  *   cupsSendRequest()      - Send an IPP request.
  28  *   cupsWriteRequestData() - Write additional data after an IPP request.
  29  *   _cupsConnect()         - Get the default server connection...
  30  *   _cupsSetError()        - Set the last IPP status code and status-message.
  31  *   _cupsSetHTTPError()    - Set the last error using the HTTP status.
  32  */
  33
  34 /*
  35  * Include necessary headers...
  36  */
  37
  38 #include "cups-private.h"
  39 #include <fcntl.h>
  40 #include <sys/stat.h>
  41 #if defined(WIN32) || defined(__EMX__)
  42 #  include <io.h>
  43 #else
  44 #  include <unistd.h>
  45 #endif /* WIN32 || __EMX__ */
  46 #ifndef O_BINARY
  47 #  define O_BINARY 0
  48 #endif /* O_BINARY */
  49
  50
  51 /*
  52  * 'cupsDoFileRequest()' - Do an IPP request with a file.
  53  *
  54  * This function sends the IPP request to the specified server, retrying
  55  * and authenticating as necessary.  The request is freed with @link ippDelete@
  56  * after receiving a valid IPP response.
  57  */
  58
  59 ipp_t *                                 /* O - Response data */
  60 cupsDoFileRequest(http_t     *http,     /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
  61                   ipp_t      *request,  /* I - IPP request */
  62                   const char *resource, /* I - HTTP resource for POST */
  63                   const char *filename) /* I - File to send or @code NULL@ for none */
  64 {
  65   ipp_t         *response;              /* IPP response data */
  66   int           infile;                 /* Input file */
  67
  68
  69   DEBUG_printf(("cupsDoFileRequest(http=%p, request=%p(%s), resource=\"%s\", "
  70                 "filename=\"%s\")", http, request,
  71                 request ? ippOpString(request->request.op.operation_id) : "?",
  72                 resource, filename));
  73
  74   if (filename)
  75   {
  76     if ((infile = open(filename, O_RDONLY | O_BINARY)) < 0)
  77     {
  78      /*
  79       * Can't get file information!
  80       */
  81
  82       _cupsSetError(errno == ENOENT ? IPP_NOT_FOUND : IPP_NOT_AUTHORIZED,
  83                     NULL, 0);
  84
  85       ippDelete(request);
  86
  87       return (NULL);
  88     }
  89   }
  90   else
  91     infile = -1;
  92
  93   response = cupsDoIORequest(http, request, resource, infile, -1);
  94
  95   if (infile >= 0)
  96     close(infile);
  97
  98   return (response);
  99 }
 100
 101
 102 /*
 103  * 'cupsDoIORequest()' - Do an IPP request with file descriptors.
 104  *
 105  * This function sends the IPP request to the specified server, retrying
 106  * and authenticating as necessary.  The request is freed with ippDelete()
 107  * after receiving a valid IPP response.
 108  *
 109  * If "infile" is a valid file descriptor, cupsDoIORequest() copies
 110  * all of the data from the file after the IPP request message.
 111  *
 112  * If "outfile" is a valid file descriptor, cupsDoIORequest() copies
 113  * all of the data after the IPP response message to the file.
 114  *
 115  * @since CUPS 1.3/Mac OS X 10.5@
 116  */
 117
 118 ipp_t *                                 /* O - Response data */
 119 cupsDoIORequest(http_t     *http,       /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 120                 ipp_t      *request,    /* I - IPP request */
 121                 const char *resource,   /* I - HTTP resource for POST */
 122                 int        infile,      /* I - File to read from or -1 for none */
 123                 int        outfile)     /* I - File to write to or -1 for none */
 124 {
 125   ipp_t         *response = NULL;       /* IPP response data */
 126   size_t        length = 0;             /* Content-Length value */
 127   http_status_t status;                 /* Status of HTTP request */
 128   struct stat   fileinfo;               /* File information */
 129   int           bytes;                  /* Number of bytes read/written */
 130   char          buffer[32768];          /* Output buffer */
 131
 132
 133   DEBUG_printf(("cupsDoIORequest(http=%p, request=%p(%s), resource=\"%s\", "
 134                 "infile=%d, outfile=%d)", http, request,
 135                 request ? ippOpString(request->request.op.operation_id) : "?",
 136                 resource, infile, outfile));
 137
 138  /*
 139   * Range check input...
 140   */
 141
 142   if (!request || !resource)
 143   {
 144     ippDelete(request);
 145
 146     _cupsSetError(IPP_INTERNAL_ERROR, strerror(EINVAL), 0);
 147
 148     return (NULL);
 149   }
 150
 151  /*
 152   * Get the default connection as needed...
 153   */
 154
 155   if (!http)
 156     if ((http = _cupsConnect()) == NULL)
 157     {
 158       ippDelete(request);
 159
 160       return (NULL);
 161     }
 162
 163  /*
 164   * See if we have a file to send...
 165   */
 166
 167   if (infile >= 0)
 168   {
 169     if (fstat(infile, &fileinfo))
 170     {
 171      /*
 172       * Can't get file information!
 173       */
 174
 175       _cupsSetError(errno == EBADF ? IPP_NOT_FOUND : IPP_NOT_AUTHORIZED,
 176                     NULL, 0);
 177
 178       ippDelete(request);
 179
 180       return (NULL);
 181     }
 182
 183 #ifdef WIN32
 184     if (fileinfo.st_mode & _S_IFDIR)
 185 #else
 186     if (S_ISDIR(fileinfo.st_mode))
 187 #endif /* WIN32 */
 188     {
 189      /*
 190       * Can't send a directory...
 191       */
 192
 193       ippDelete(request);
 194
 195       _cupsSetError(IPP_NOT_POSSIBLE, strerror(EISDIR), 0);
 196
 197       return (NULL);
 198     }
 199
 200 #ifndef WIN32
 201     if (!S_ISREG(fileinfo.st_mode))
 202       length = 0;                       /* Chunk when piping */
 203     else
 204 #endif /* !WIN32 */
 205     length = ippLength(request) + fileinfo.st_size;
 206   }
 207   else
 208     length = ippLength(request);
 209
 210   DEBUG_printf(("2cupsDoIORequest: Request length=%ld, total length=%ld",
 211                 (long)ippLength(request), (long)length));
 212
 213  /*
 214   * Clear any "Local" authentication data since it is probably stale...
 215   */
 216
 217   if (http->authstring && !strncmp(http->authstring, "Local ", 6))
 218     httpSetAuthString(http, NULL, NULL);
 219
 220  /*
 221   * Loop until we can send the request without authorization problems.
 222   */
 223
 224   while (response == NULL)
 225   {
 226     DEBUG_puts("2cupsDoIORequest: setup...");
 227
 228    /*
 229     * Send the request...
 230     */
 231
 232     status = cupsSendRequest(http, request, resource, length);
 233
 234     DEBUG_printf(("2cupsDoIORequest: status=%d", status));
 235
 236     if (status == HTTP_CONTINUE && request->state == IPP_DATA && infile >= 0)
 237     {
 238       DEBUG_puts("2cupsDoIORequest: file write...");
 239
 240      /*
 241       * Send the file with the request...
 242       */
 243
 244 #ifndef WIN32
 245       if (S_ISREG(fileinfo.st_mode))
 246 #endif /* WIN32 */
 247       lseek(infile, 0, SEEK_SET);
 248
 249       while ((bytes = (int)read(infile, buffer, sizeof(buffer))) > 0)
 250       {
 251         if (httpCheck(http))
 252         {
 253           _httpUpdate(http, &status);
 254
 255           if (status >= HTTP_MULTIPLE_CHOICES)
 256             break;
 257         }
 258
 259         if (httpWrite2(http, buffer, bytes) < bytes)
 260           break;
 261       }
 262     }
 263
 264    /*
 265     * Get the server's response...
 266     */
 267
 268     if (status == HTTP_CONTINUE || status == HTTP_OK)
 269     {
 270       response = cupsGetResponse(http, resource);
 271       status   = http->status;
 272     }
 273     else
 274       httpFlush(http);
 275
 276     DEBUG_printf(("2cupsDoIORequest: status=%d", status));
 277
 278     if (status == HTTP_ERROR ||
 279         (status >= HTTP_BAD_REQUEST && status != HTTP_UNAUTHORIZED &&
 280          status != HTTP_UPGRADE_REQUIRED))
 281     {
 282       _cupsSetHTTPError(status);
 283       break;
 284     }
 285
 286     if (response && outfile >= 0)
 287     {
 288      /*
 289       * Write trailing data to file...
 290       */
 291
 292       while ((bytes = (int)httpRead2(http, buffer, sizeof(buffer))) > 0)
 293         if (write(outfile, buffer, bytes) < bytes)
 294           break;
 295     }
 296
 297     if (http->state != HTTP_WAITING)
 298     {
 299      /*
 300       * Flush any remaining data...
 301       */
 302
 303       httpFlush(http);
 304     }
 305   }
 306
 307  /*
 308   * Delete the original request and return the response...
 309   */
 310
 311   ippDelete(request);
 312
 313   return (response);
 314 }
 315
 316
 317 /*
 318  * 'cupsDoRequest()' - Do an IPP request.
 319  *
 320  * This function sends the IPP request to the specified server, retrying
 321  * and authenticating as necessary.  The request is freed with ippDelete()
 322  * after receiving a valid IPP response.
 323  */
 324
 325 ipp_t *                                 /* O - Response data */
 326 cupsDoRequest(http_t     *http,         /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 327               ipp_t      *request,      /* I - IPP request */
 328               const char *resource)     /* I - HTTP resource for POST */
 329 {
 330   DEBUG_printf(("cupsDoRequest(http=%p, request=%p(%s), resource=\"%s\")",
 331                 http, request,
 332                 request ? ippOpString(request->request.op.operation_id) : "?",
 333                 resource));
 334
 335   return (cupsDoIORequest(http, request, resource, -1, -1));
 336 }
 337
 338
 339 /*
 340  * 'cupsGetResponse()' - Get a response to an IPP request.
 341  *
 342  * Use this function to get the response for an IPP request sent using
 343  * cupsSendDocument() or cupsSendRequest(). For requests that return
 344  * additional data, use httpRead() after getting a successful response,
 345  * otherwise call httpFlush() to complete the response processing.
 346  *
 347  * @since CUPS 1.4/Mac OS X 10.6@
 348  */
 349
 350 ipp_t *                                 /* O - Response or @code NULL@ on HTTP error */
 351 cupsGetResponse(http_t     *http,       /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 352                 const char *resource)   /* I - HTTP resource for POST */
 353 {
 354   http_status_t status;                 /* HTTP status */
 355   ipp_state_t   state;                  /* IPP read state */
 356   ipp_t         *response = NULL;       /* IPP response */
 357
 358
 359   DEBUG_printf(("cupsGetResponse(http=%p, resource=\"%s\")", http, resource));
 360
 361  /*
 362   * Connect to the default server as needed...
 363   */
 364
 365   if (!http)
 366     http = _cupsConnect();
 367
 368   if (!http || (http->state != HTTP_POST_RECV && http->state != HTTP_POST_SEND))
 369     return (NULL);
 370
 371  /*
 372   * Check for an unfinished chunked request...
 373   */
 374
 375   if (http->data_encoding == HTTP_ENCODE_CHUNKED)
 376   {
 377    /*
 378     * Send a 0-length chunk to finish off the request...
 379     */
 380
 381     DEBUG_puts("2cupsGetResponse: Finishing chunked POST...");
 382
 383     if (httpWrite2(http, "", 0) < 0)
 384       return (NULL);
 385   }
 386
 387  /*
 388   * Wait for a response from the server...
 389   */
 390
 391   DEBUG_printf(("2cupsGetResponse: Update loop, http->status=%d...",
 392                 http->status));
 393
 394   do
 395   {
 396     status = httpUpdate(http);
 397   }
 398   while (status != HTTP_ERROR && http->state == HTTP_POST_RECV);
 399
 400   DEBUG_printf(("2cupsGetResponse: status=%d", status));
 401
 402   if (status == HTTP_OK)
 403   {
 404    /*
 405     * Get the IPP response...
 406     */
 407
 408     response = ippNew();
 409
 410     while ((state = ippRead(http, response)) != IPP_DATA)
 411       if (state == IPP_ERROR)
 412         break;
 413
 414     if (state == IPP_ERROR)
 415     {
 416      /*
 417       * Flush remaining data and delete the response...
 418       */
 419
 420       DEBUG_puts("1cupsGetResponse: IPP read error!");
 421
 422       httpFlush(http);
 423
 424       ippDelete(response);
 425       response = NULL;
 426
 427       _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 428       http->status = status = HTTP_ERROR;
 429       http->error  = EIO;
 430     }
 431   }
 432   else if (status != HTTP_ERROR)
 433   {
 434    /*
 435     * Flush any error message...
 436     */
 437
 438     httpFlush(http);
 439
 440    /*
 441     * Then handle encryption and authentication...
 442     */
 443
 444     if (status == HTTP_UNAUTHORIZED)
 445     {
 446      /*
 447       * See if we can do authentication...
 448       */
 449
 450       DEBUG_puts("2cupsGetResponse: Need authorization...");
 451
 452       if (!cupsDoAuthentication(http, "POST", resource))
 453         httpReconnect(http);
 454       else
 455         http->status = status = HTTP_AUTHORIZATION_CANCELED;
 456     }
 457
 458 #ifdef HAVE_SSL
 459     else if (status == HTTP_UPGRADE_REQUIRED)
 460     {
 461      /*
 462       * Force a reconnect with encryption...
 463       */
 464
 465       DEBUG_puts("2cupsGetResponse: Need encryption...");
 466
 467       if (!httpReconnect(http))
 468         httpEncryption(http, HTTP_ENCRYPT_REQUIRED);
 469     }
 470 #endif /* HAVE_SSL */
 471   }
 472
 473   if (response)
 474   {
 475     ipp_attribute_t     *attr;          /* status-message attribute */
 476
 477
 478     attr = ippFindAttribute(response, "status-message", IPP_TAG_TEXT);
 479
 480     DEBUG_printf(("1cupsGetResponse: status-code=%s, status-message=\"%s\"",
 481                   ippErrorString(response->request.status.status_code),
 482                   attr ? attr->values[0].string.text : ""));
 483
 484     _cupsSetError(response->request.status.status_code,
 485                   attr ? attr->values[0].string.text :
 486                       ippErrorString(response->request.status.status_code), 0);
 487   }
 488   else if (status != HTTP_OK)
 489     _cupsSetHTTPError(status);
 490
 491   return (response);
 492 }
 493
 494
 495 /*
 496  * 'cupsLastError()' - Return the last IPP status code.
 497  */
 498
 499 ipp_status_t                            /* O - IPP status code from last request */
 500 cupsLastError(void)
 501 {
 502   return (_cupsGlobals()->last_error);
 503 }
 504
 505
 506 /*
 507  * 'cupsLastErrorString()' - Return the last IPP status-message.
 508  *
 509  * @since CUPS 1.2/Mac OS X 10.5@
 510  */
 511
 512 const char *                            /* O - status-message text from last request */
 513 cupsLastErrorString(void)
 514 {
 515   return (_cupsGlobals()->last_status_message);
 516 }
 517
 518
 519 /*
 520  * '_cupsNextDelay()' - Return the next retry delay value.
 521  *
 522  * This function currently returns the Fibonacci sequence 1 1 2 3 5 8.
 523  *
 524  * Pass 0 for the current delay value to initialize the sequence.
 525  */
 526
 527 int                                     /* O  - Next delay value */
 528 _cupsNextDelay(int current,             /* I  - Current delay value or 0 */
 529                int *previous)           /* IO - Previous delay value */
 530 {
 531   int   next;                           /* Next delay value */
 532
 533
 534   if (current > 0)
 535   {
 536     next      = (current + *previous) % 12;
 537     *previous = next < current ? 0 : current;
 538   }
 539   else
 540   {
 541     next      = 1;
 542     *previous = 0;
 543   }
 544
 545   return (next);
 546 }
 547
 548
 549 /*
 550  * 'cupsReadResponseData()' - Read additional data after the IPP response.
 551  *
 552  * This function is used after cupsGetResponse() to read the PPD or document
 553  * files for CUPS_GET_PPD and CUPS_GET_DOCUMENT requests, respectively.
 554  *
 555  * @since CUPS 1.4/Mac OS X 10.6@
 556  */
 557
 558 ssize_t                                 /* O - Bytes read, 0 on EOF, -1 on error */
 559 cupsReadResponseData(
 560     http_t *http,                       /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 561     char   *buffer,                     /* I - Buffer to use */
 562     size_t length)                      /* I - Number of bytes to read */
 563 {
 564  /*
 565   * Get the default connection as needed...
 566   */
 567
 568   DEBUG_printf(("cupsReadResponseData(http=%p, buffer=%p, "
 569                 "length=" CUPS_LLFMT ")", http, buffer, CUPS_LLCAST length));
 570
 571   if (!http)
 572   {
 573     _cups_globals_t *cg = _cupsGlobals();
 574                                         /* Pointer to library globals */
 575
 576     if ((http = cg->http) == NULL)
 577     {
 578       _cupsSetError(IPP_INTERNAL_ERROR, _("No active connection"), 1);
 579       return (-1);
 580     }
 581   }
 582
 583  /*
 584   * Then read from the HTTP connection...
 585   */
 586
 587   return (httpRead2(http, buffer, length));
 588 }
 589
 590
 591 /*
 592  * 'cupsSendRequest()' - Send an IPP request.
 593  *
 594  * Use httpWrite() to write any additional data (document, PPD file, etc.)
 595  * for the request, cupsGetResponse() to get the IPP response, and httpRead()
 596  * to read any additional data following the response. Only one request can be
 597  * sent/queued at a time.
 598  *
 599  * Unlike cupsDoFileRequest(), cupsDoIORequest(), and cupsDoRequest(), the
 600  * request is not freed.
 601  *
 602  * @since CUPS 1.4/Mac OS X 10.6@
 603  */
 604
 605 http_status_t                           /* O - Initial HTTP status */
 606 cupsSendRequest(http_t     *http,       /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 607                 ipp_t      *request,    /* I - IPP request */
 608                 const char *resource,   /* I - Resource path */
 609                 size_t     length)      /* I - Length of data to follow or @code CUPS_LENGTH_VARIABLE@ */
 610 {
 611   http_status_t status;                 /* Status of HTTP request */
 612   int           got_status;             /* Did we get the status? */
 613   ipp_state_t   state;                  /* State of IPP processing */
 614   http_status_t expect;                 /* Expect: header to use */
 615
 616
 617   DEBUG_printf(("cupsSendRequest(http=%p, request=%p(%s), resource=\"%s\", "
 618                 "length=" CUPS_LLFMT ")", http, request,
 619                 request ? ippOpString(request->request.op.operation_id) : "?",
 620                 resource, CUPS_LLCAST length));
 621
 622  /*
 623   * Range check input...
 624   */
 625
 626   if (!request || !resource)
 627   {
 628     _cupsSetError(IPP_INTERNAL_ERROR, strerror(EINVAL), 0);
 629
 630     return (HTTP_ERROR);
 631   }
 632
 633  /*
 634   * Get the default connection as needed...
 635   */
 636
 637   if (!http)
 638     if ((http = _cupsConnect()) == NULL)
 639       return (HTTP_SERVICE_UNAVAILABLE);
 640
 641  /*
 642   * If the prior request was not flushed out, do so now...
 643   */
 644
 645   if (http->state == HTTP_GET_SEND ||
 646       http->state == HTTP_POST_SEND)
 647     httpFlush(http);
 648   else if (http->state != HTTP_WAITING)
 649   {
 650     _cupsSetError(IPP_INTERNAL_ERROR, strerror(EINVAL), 0);
 651
 652     return (HTTP_ERROR);
 653   }
 654
 655 #ifdef HAVE_SSL
 656  /*
 657   * See if we have an auth-info attribute and are communicating over
 658   * a non-local link.  If so, encrypt the link so that we can pass
 659   * the authentication information securely...
 660   */
 661
 662   if (ippFindAttribute(request, "auth-info", IPP_TAG_TEXT) &&
 663       !httpAddrLocalhost(http->hostaddr) && !http->tls &&
 664       httpEncryption(http, HTTP_ENCRYPT_REQUIRED))
 665   {
 666     _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 667     return (HTTP_SERVICE_UNAVAILABLE);
 668   }
 669 #endif /* HAVE_SSL */
 670
 671  /*
 672   * Reconnect if the last response had a "Connection: close"...
 673   */
 674
 675   if (!_cups_strcasecmp(http->fields[HTTP_FIELD_CONNECTION], "close"))
 676     if (httpReconnect(http))
 677     {
 678       _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 679       return (HTTP_SERVICE_UNAVAILABLE);
 680     }
 681
 682  /*
 683   * Loop until we can send the request without authorization problems.
 684   */
 685
 686   expect = HTTP_CONTINUE;
 687
 688   for (;;)
 689   {
 690     DEBUG_puts("2cupsSendRequest: Setup...");
 691
 692    /*
 693     * Setup the HTTP variables needed...
 694     */
 695
 696     httpClearFields(http);
 697     httpSetExpect(http, expect);
 698     httpSetField(http, HTTP_FIELD_CONTENT_TYPE, "application/ipp");
 699     httpSetLength(http, length);
 700
 701 #ifdef HAVE_GSSAPI
 702     if (http->authstring && !strncmp(http->authstring, "Negotiate", 9))
 703     {
 704      /*
 705       * Do not use cached Kerberos credentials since they will look like a
 706       * "replay" attack...
 707       */
 708
 709       _cupsSetNegotiateAuthString(http, "POST", resource);
 710     }
 711 #endif /* HAVE_GSSAPI */
 712
 713     httpSetField(http, HTTP_FIELD_AUTHORIZATION, http->authstring);
 714
 715     DEBUG_printf(("2cupsSendRequest: authstring=\"%s\"", http->authstring));
 716
 717    /*
 718     * Try the request...
 719     */
 720
 721     DEBUG_puts("2cupsSendRequest: Sending HTTP POST...");
 722
 723     if (httpPost(http, resource))
 724     {
 725       if (httpReconnect(http))
 726       {
 727         _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 728         return (HTTP_SERVICE_UNAVAILABLE);
 729       }
 730       else
 731         continue;
 732     }
 733
 734    /*
 735     * Send the IPP data...
 736     */
 737
 738     DEBUG_puts("2cupsSendRequest: Writing IPP request...");
 739
 740     request->state = IPP_IDLE;
 741     status         = HTTP_CONTINUE;
 742     got_status     = 0;
 743
 744     while ((state = ippWrite(http, request)) != IPP_DATA)
 745       if (state == IPP_ERROR)
 746         break;
 747       else if (httpCheck(http))
 748       {
 749         got_status = 1;
 750
 751         _httpUpdate(http, &status);
 752         if (status >= HTTP_MULTIPLE_CHOICES)
 753           break;
 754       }
 755
 756     if (state == IPP_ERROR)
 757     {
 758       http->status = HTTP_ERROR;
 759       http->state  = HTTP_WAITING;
 760
 761       return (HTTP_ERROR);
 762     }
 763
 764    /*
 765     * Wait up to 1 second to get the 100-continue response as needed...
 766     */
 767
 768     if (!got_status)
 769     {
 770       if (expect == HTTP_CONTINUE)
 771       {
 772         DEBUG_puts("2cupsSendRequest: Waiting for 100-continue...");
 773
 774         if (httpWait(http, 1000))
 775           _httpUpdate(http, &status);
 776       }
 777       else if (httpCheck(http))
 778         _httpUpdate(http, &status);
 779     }
 780
 781     DEBUG_printf(("2cupsSendRequest: status=%d", status));
 782
 783    /*
 784     * Process the current HTTP status...
 785     */
 786
 787     if (status >= HTTP_MULTIPLE_CHOICES)
 788       httpFlush(http);
 789
 790     switch (status)
 791     {
 792       case HTTP_ERROR :
 793       case HTTP_CONTINUE :
 794       case HTTP_OK :
 795           return (status);
 796
 797       case HTTP_UNAUTHORIZED :
 798           if (cupsDoAuthentication(http, "POST", resource))
 799             return (HTTP_AUTHORIZATION_CANCELED);
 800
 801           if (httpReconnect(http))
 802           {
 803             _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 804             return (HTTP_SERVICE_UNAVAILABLE);
 805           }
 806           break;
 807
 808 #ifdef HAVE_SSL
 809       case HTTP_UPGRADE_REQUIRED :
 810          /*
 811           * Flush any error message, reconnect, and then upgrade with
 812           * encryption...
 813           */
 814
 815           if (httpReconnect(http))
 816           {
 817             _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 818             return (HTTP_SERVICE_UNAVAILABLE);
 819           }
 820
 821           if (httpEncryption(http, HTTP_ENCRYPT_REQUIRED))
 822           {
 823             _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 824             return (HTTP_SERVICE_UNAVAILABLE);
 825           }
 826           break;
 827 #endif /* HAVE_SSL */
 828
 829       case HTTP_EXPECTATION_FAILED :
 830          /*
 831           * Don't try using the Expect: header the next time around...
 832           */
 833
 834           expect = (http_status_t)0;
 835
 836           if (httpReconnect(http))
 837           {
 838             _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 839             return (HTTP_SERVICE_UNAVAILABLE);
 840           }
 841           break;
 842
 843       default :
 844          /*
 845           * Some other error...
 846           */
 847
 848           return (status);
 849     }
 850   }
 851 }
 852
 853
 854 /*
 855  * 'cupsWriteRequestData()' - Write additional data after an IPP request.
 856  *
 857  * This function is used after @link cupsSendRequest@ to provide a PPD and
 858  * after @link cupsStartDocument@ to provide a document file.
 859  *
 860  * @since CUPS 1.4/Mac OS X 10.6@
 861  */
 862
 863 http_status_t                           /* O - @code HTTP_CONTINUE@ if OK or HTTP status on error */
 864 cupsWriteRequestData(
 865     http_t     *http,                   /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 866     const char *buffer,                 /* I - Bytes to write */
 867     size_t     length)                  /* I - Number of bytes to write */
 868 {
 869   int   wused;                          /* Previous bytes in buffer */
 870
 871
 872  /*
 873   * Get the default connection as needed...
 874   */
 875
 876   DEBUG_printf(("cupsWriteRequestData(http=%p, buffer=%p, "
 877                 "length=" CUPS_LLFMT ")", http, buffer, CUPS_LLCAST length));
 878
 879   if (!http)
 880   {
 881     _cups_globals_t *cg = _cupsGlobals();
 882                                         /* Pointer to library globals */
 883
 884     if ((http = cg->http) == NULL)
 885     {
 886       _cupsSetError(IPP_INTERNAL_ERROR, _("No active connection"), 1);
 887       DEBUG_puts("1cupsWriteRequestData: Returning HTTP_ERROR.");
 888       return (HTTP_ERROR);
 889     }
 890   }
 891
 892  /*
 893   * Then write to the HTTP connection...
 894   */
 895
 896   wused = http->wused;
 897
 898   if (httpWrite2(http, buffer, length) < 0)
 899   {
 900     DEBUG_puts("1cupsWriteRequestData: Returning HTTP_ERROR.");
 901     _cupsSetError(IPP_INTERNAL_ERROR, strerror(http->error), 0);
 902     return (HTTP_ERROR);
 903   }
 904
 905  /*
 906   * Finally, check if we have any pending data from the server...
 907   */
 908
 909   if (length >= HTTP_MAX_BUFFER ||
 910       http->wused < wused ||
 911       (wused > 0 && http->wused == length))
 912   {
 913    /*
 914     * We've written something to the server, so check for response data...
 915     */
 916
 917     if (_httpWait(http, 0, 1))
 918     {
 919       http_status_t     status;         /* Status from _httpUpdate */
 920
 921       _httpUpdate(http, &status);
 922       if (status >= HTTP_MULTIPLE_CHOICES)
 923       {
 924         _cupsSetHTTPError(status);
 925         httpFlush(http);
 926       }
 927
 928       DEBUG_printf(("1cupsWriteRequestData: Returning %d.\n", status));
 929       return (status);
 930     }
 931   }
 932
 933   DEBUG_puts("1cupsWriteRequestData: Returning HTTP_CONTINUE.");
 934   return (HTTP_CONTINUE);
 935 }
 936
 937
 938 /*
 939  * '_cupsConnect()' - Get the default server connection...
 940  */
 941
 942 http_t *                                /* O - HTTP connection */
 943 _cupsConnect(void)
 944 {
 945   _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */
 946
 947
 948  /*
 949   * See if we are connected to the same server...
 950   */
 951
 952   if (cg->http)
 953   {
 954    /*
 955     * Compare the connection hostname, port, and encryption settings to
 956     * the cached defaults; these were initialized the first time we
 957     * connected...
 958     */
 959
 960     if (strcmp(cg->http->hostname, cg->server) ||
 961         cg->ipp_port != _httpAddrPort(cg->http->hostaddr) ||
 962         (cg->http->encryption != cg->encryption &&
 963          cg->http->encryption == HTTP_ENCRYPT_NEVER))
 964     {
 965      /*
 966       * Need to close the current connection because something has changed...
 967       */
 968
 969       httpClose(cg->http);
 970       cg->http = NULL;
 971     }
 972   }
 973
 974  /*
 975   * (Re)connect as needed...
 976   */
 977
 978   if (!cg->http)
 979   {
 980     if ((cg->http = httpConnectEncrypt(cupsServer(), ippPort(),
 981                                        cupsEncryption())) == NULL)
 982     {
 983       if (errno)
 984         _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 985       else
 986         _cupsSetError(IPP_SERVICE_UNAVAILABLE,
 987                       _("Unable to connect to host."), 1);
 988     }
 989   }
 990
 991  /*
 992   * Return the cached connection...
 993   */
 994
 995   return (cg->http);
 996 }
 997
 998
 999 /*
1000  * '_cupsSetError()' - Set the last IPP status code and status-message.
1001  */
1002
1003 void
1004 _cupsSetError(ipp_status_t status,      /* I - IPP status code */
1005               const char   *message,    /* I - status-message value */
1006               int          localize)    /* I - Localize the message? */
1007 {
1008   _cups_globals_t       *cg;            /* Global data */
1009
1010
1011   if (!message && errno)
1012   {
1013     message  = strerror(errno);
1014     localize = 0;
1015   }
1016
1017   cg             = _cupsGlobals();
1018   cg->last_error = status;
1019
1020   if (cg->last_status_message)
1021   {
1022     _cupsStrFree(cg->last_status_message);
1023
1024     cg->last_status_message = NULL;
1025   }
1026
1027   if (message)
1028   {
1029     if (localize)
1030     {
1031      /*
1032       * Get the message catalog...
1033       */
1034
1035       if (!cg->lang_default)
1036         cg->lang_default = cupsLangDefault();
1037
1038       cg->last_status_message = _cupsStrAlloc(_cupsLangString(cg->lang_default,
1039                                                               message));
1040     }
1041     else
1042       cg->last_status_message = _cupsStrAlloc(message);
1043   }
1044
1045   DEBUG_printf(("4_cupsSetError: last_error=%s, last_status_message=\"%s\"",
1046                 ippErrorString(cg->last_error), cg->last_status_message));
1047 }
1048
1049
1050 /*
1051  * '_cupsSetHTTPError()' - Set the last error using the HTTP status.
1052  */
1053
1054 void
1055 _cupsSetHTTPError(http_status_t status) /* I - HTTP status code */
1056 {
1057   switch (status)
1058   {
1059     case HTTP_NOT_FOUND :
1060         _cupsSetError(IPP_NOT_FOUND, httpStatus(status), 0);
1061         break;
1062
1063     case HTTP_UNAUTHORIZED :
1064         _cupsSetError(IPP_NOT_AUTHENTICATED, httpStatus(status), 0);
1065         break;
1066
1067     case HTTP_AUTHORIZATION_CANCELED :
1068         _cupsSetError(IPP_AUTHENTICATION_CANCELED, httpStatus(status), 0);
1069         break;
1070
1071     case HTTP_FORBIDDEN :
1072         _cupsSetError(IPP_FORBIDDEN, httpStatus(status), 0);
1073         break;
1074
1075     case HTTP_BAD_REQUEST :
1076         _cupsSetError(IPP_BAD_REQUEST, httpStatus(status), 0);
1077         break;
1078
1079     case HTTP_REQUEST_TOO_LARGE :
1080         _cupsSetError(IPP_REQUEST_VALUE, httpStatus(status), 0);
1081         break;
1082
1083     case HTTP_NOT_IMPLEMENTED :
1084         _cupsSetError(IPP_OPERATION_NOT_SUPPORTED, httpStatus(status), 0);
1085         break;
1086
1087     case HTTP_NOT_SUPPORTED :
1088         _cupsSetError(IPP_VERSION_NOT_SUPPORTED, httpStatus(status), 0);
1089         break;
1090
1091     case HTTP_UPGRADE_REQUIRED :
1092         _cupsSetError(IPP_UPGRADE_REQUIRED, httpStatus(status), 0);
1093         break;
1094
1095     case HTTP_PKI_ERROR :
1096         _cupsSetError(IPP_PKI_ERROR, httpStatus(status), 0);
1097         break;
1098
1099     case HTTP_ERROR :
1100         _cupsSetError(IPP_INTERNAL_ERROR, httpStatus(status), 0);
1101         break;
1102
1103     default :
1104         DEBUG_printf(("4_cupsSetHTTPError: HTTP error %d mapped to "
1105                       "IPP_SERVICE_UNAVAILABLE!", status));
1106         _cupsSetError(IPP_SERVICE_UNAVAILABLE, httpStatus(status), 0);
1107         break;
1108   }
1109 }
1110
1111
1112 /*
1113  * End of "$Id: request.c 7946 2008-09-16 23:27:54Z mike $".
1114  */