1 /*
2 * IPP utilities for CUPS.
3 *
4 * Copyright 2007-2014 by Apple Inc.
5 * Copyright 1997-2007 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 * 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 <fcntl.h>
22 #include <sys/stat.h>
23 #if defined(WIN32) || defined(__EMX__)
24 # include <io.h>
25 #else
26 # include <unistd.h>
27 #endif /* WIN32 || __EMX__ */
28 #ifndef O_BINARY
29 # define O_BINARY 0
30 #endif /* O_BINARY */
31 #ifndef MSG_DONTWAIT
32 # define MSG_DONTWAIT 0
33 #endif /* !MSG_DONTWAIT */
34
35
36 /*
37 * 'cupsDoFileRequest()' - Do an IPP request with a file.
38 *
39 * This function sends the IPP request and attached file to the specified
40 * server, retrying and authenticating as necessary. The request is freed with
41 * @link ippDelete@.
42 */
43
44 ipp_t * /* O - Response data */
cupsDoFileRequest(http_t * http,ipp_t * request,const char * resource,const char * filename)45 cupsDoFileRequest(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
46 ipp_t *request, /* I - IPP request */
47 const char *resource, /* I - HTTP resource for POST */
48 const char *filename) /* I - File to send or @code NULL@ for none */
49 {
50 ipp_t *response; /* IPP response data */
51 int infile; /* Input file */
52
53
54 DEBUG_printf(("cupsDoFileRequest(http=%p, request=%p(%s), resource=\"%s\", filename=\"%s\")", (void *)http, (void *)request, request ? ippOpString(request->request.op.operation_id) : "?", resource, filename));
55
56 if (filename)
57 {
58 if ((infile = open(filename, O_RDONLY | O_BINARY)) < 0)
59 {
60 /*
61 * Can't get file information!
62 */
63
64 _cupsSetError(errno == ENOENT ? IPP_STATUS_ERROR_NOT_FOUND : IPP_STATUS_ERROR_NOT_AUTHORIZED,
65 NULL, 0);
66
67 ippDelete(request);
68
69 return (NULL);
70 }
71 }
72 else
73 infile = -1;
74
75 response = cupsDoIORequest(http, request, resource, infile, -1);
76
77 if (infile >= 0)
78 close(infile);
79
80 return (response);
81 }
82
83
84 /*
85 * 'cupsDoIORequest()' - Do an IPP request with file descriptors.
86 *
87 * This function sends the IPP request with the optional input file "infile" to
88 * the specified server, retrying and authenticating as necessary. The request
89 * is freed with @link ippDelete@.
90 *
91 * If "infile" is a valid file descriptor, @code cupsDoIORequest@ copies
92 * all of the data from the file after the IPP request message.
93 *
94 * If "outfile" is a valid file descriptor, @code cupsDoIORequest@ copies
95 * all of the data after the IPP response message to the file.
96 *
97 * @since CUPS 1.3/macOS 10.5@
98 */
99
100 ipp_t * /* O - Response data */
cupsDoIORequest(http_t * http,ipp_t * request,const char * resource,int infile,int outfile)101 cupsDoIORequest(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
102 ipp_t *request, /* I - IPP request */
103 const char *resource, /* I - HTTP resource for POST */
104 int infile, /* I - File to read from or -1 for none */
105 int outfile) /* I - File to write to or -1 for none */
106 {
107 ipp_t *response = NULL; /* IPP response data */
108 size_t length = 0; /* Content-Length value */
109 http_status_t status; /* Status of HTTP request */
110 struct stat fileinfo; /* File information */
111 ssize_t bytes; /* Number of bytes read/written */
112 char buffer[32768]; /* Output buffer */
113
114
115 DEBUG_printf(("cupsDoIORequest(http=%p, request=%p(%s), resource=\"%s\", infile=%d, outfile=%d)", (void *)http, (void *)request, request ? ippOpString(request->request.op.operation_id) : "?", resource, infile, outfile));
116
117 /*
118 * Range check input...
119 */
120
121 if (!request || !resource)
122 {
123 ippDelete(request);
124
125 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0);
126
127 return (NULL);
128 }
129
130 /*
131 * Get the default connection as needed...
132 */
133
134 if (!http)
135 if ((http = _cupsConnect()) == NULL)
136 {
137 ippDelete(request);
138
139 return (NULL);
140 }
141
142 /*
143 * See if we have a file to send...
144 */
145
146 if (infile >= 0)
147 {
148 if (fstat(infile, &fileinfo))
149 {
150 /*
151 * Can't get file information!
152 */
153
154 _cupsSetError(errno == EBADF ? IPP_STATUS_ERROR_NOT_FOUND : IPP_STATUS_ERROR_NOT_AUTHORIZED,
155 NULL, 0);
156
157 ippDelete(request);
158
159 return (NULL);
160 }
161
162 #ifdef WIN32
163 if (fileinfo.st_mode & _S_IFDIR)
164 #else
165 if (S_ISDIR(fileinfo.st_mode))
166 #endif /* WIN32 */
167 {
168 /*
169 * Can't send a directory...
170 */
171
172 ippDelete(request);
173
174 _cupsSetError(IPP_STATUS_ERROR_NOT_POSSIBLE, strerror(EISDIR), 0);
175
176 return (NULL);
177 }
178
179 #ifndef WIN32
180 if (!S_ISREG(fileinfo.st_mode))
181 length = 0; /* Chunk when piping */
182 else
183 #endif /* !WIN32 */
184 length = ippLength(request) + (size_t)fileinfo.st_size;
185 }
186 else
187 length = ippLength(request);
188
189 DEBUG_printf(("2cupsDoIORequest: Request length=%ld, total length=%ld",
190 (long)ippLength(request), (long)length));
191
192 /*
193 * Clear any "Local" authentication data since it is probably stale...
194 */
195
196 if (http->authstring && !strncmp(http->authstring, "Local ", 6))
197 httpSetAuthString(http, NULL, NULL);
198
199 /*
200 * Loop until we can send the request without authorization problems.
201 */
202
203 while (response == NULL)
204 {
205 DEBUG_puts("2cupsDoIORequest: setup...");
206
207 /*
208 * Send the request...
209 */
210
211 status = cupsSendRequest(http, request, resource, length);
212
213 DEBUG_printf(("2cupsDoIORequest: status=%d", status));
214
215 if (status == HTTP_STATUS_CONTINUE && request->state == IPP_STATE_DATA && infile >= 0)
216 {
217 DEBUG_puts("2cupsDoIORequest: file write...");
218
219 /*
220 * Send the file with the request...
221 */
222
223 #ifndef WIN32
224 if (S_ISREG(fileinfo.st_mode))
225 #endif /* WIN32 */
226 lseek(infile, 0, SEEK_SET);
227
228 while ((bytes = read(infile, buffer, sizeof(buffer))) > 0)
229 {
230 if ((status = cupsWriteRequestData(http, buffer, (size_t)bytes))
231 != HTTP_STATUS_CONTINUE)
232 break;
233 }
234 }
235
236 /*
237 * Get the server's response...
238 */
239
240 if (status <= HTTP_STATUS_CONTINUE || status == HTTP_STATUS_OK)
241 {
242 response = cupsGetResponse(http, resource);
243 status = httpGetStatus(http);
244 }
245
246 DEBUG_printf(("2cupsDoIORequest: status=%d", status));
247
248 if (status == HTTP_STATUS_ERROR ||
249 (status >= HTTP_STATUS_BAD_REQUEST && status != HTTP_STATUS_UNAUTHORIZED &&
250 status != HTTP_STATUS_UPGRADE_REQUIRED))
251 {
252 _cupsSetHTTPError(status);
253 break;
254 }
255
256 if (response && outfile >= 0)
257 {
258 /*
259 * Write trailing data to file...
260 */
261
262 while ((bytes = httpRead2(http, buffer, sizeof(buffer))) > 0)
263 if (write(outfile, buffer, (size_t)bytes) < bytes)
264 break;
265 }
266
267 if (http->state != HTTP_STATE_WAITING)
268 {
269 /*
270 * Flush any remaining data...
271 */
272
273 httpFlush(http);
274 }
275 }
276
277 /*
278 * Delete the original request and return the response...
279 */
280
281 ippDelete(request);
282
283 return (response);
284 }
285
286
287 /*
288 * 'cupsDoRequest()' - Do an IPP request.
289 *
290 * This function sends the IPP request to the specified server, retrying
291 * and authenticating as necessary. The request is freed with @link ippDelete@.
292 */
293
294 ipp_t * /* O - Response data */
cupsDoRequest(http_t * http,ipp_t * request,const char * resource)295 cupsDoRequest(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
296 ipp_t *request, /* I - IPP request */
297 const char *resource) /* I - HTTP resource for POST */
298 {
299 DEBUG_printf(("cupsDoRequest(http=%p, request=%p(%s), resource=\"%s\")", (void *)http, (void *)request, request ? ippOpString(request->request.op.operation_id) : "?", resource));
300
301 return (cupsDoIORequest(http, request, resource, -1, -1));
302 }
303
304
305 /*
306 * 'cupsGetResponse()' - Get a response to an IPP request.
307 *
308 * Use this function to get the response for an IPP request sent using
309 * @link cupsSendRequest@. For requests that return additional data, use
310 * @link cupsReadResponseData@ after getting a successful response,
311 * otherwise call @link httpFlush@ to complete the response processing.
312 *
313 * @since CUPS 1.4/macOS 10.6@
314 */
315
316 ipp_t * /* O - Response or @code NULL@ on HTTP error */
cupsGetResponse(http_t * http,const char * resource)317 cupsGetResponse(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
318 const char *resource) /* I - HTTP resource for POST */
319 {
320 http_status_t status; /* HTTP status */
321 ipp_state_t state; /* IPP read state */
322 ipp_t *response = NULL; /* IPP response */
323
324
325 DEBUG_printf(("cupsGetResponse(http=%p, resource=\"%s\")", (void *)http, resource));
326 DEBUG_printf(("1cupsGetResponse: http->state=%d", http ? http->state : HTTP_STATE_ERROR));
327
328 /*
329 * Connect to the default server as needed...
330 */
331
332 if (!http)
333 {
334 _cups_globals_t *cg = _cupsGlobals();
335 /* Pointer to library globals */
336
337 if ((http = cg->http) == NULL)
338 {
339 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No active connection."), 1);
340 DEBUG_puts("1cupsGetResponse: No active connection - returning NULL.");
341 return (NULL);
342 }
343 }
344
345 if (http->state != HTTP_STATE_POST_RECV && http->state != HTTP_STATE_POST_SEND)
346 {
347 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No request sent."), 1);
348 DEBUG_puts("1cupsGetResponse: Not in POST state - returning NULL.");
349 return (NULL);
350 }
351
352 /*
353 * Check for an unfinished chunked request...
354 */
355
356 if (http->data_encoding == HTTP_ENCODING_CHUNKED)
357 {
358 /*
359 * Send a 0-length chunk to finish off the request...
360 */
361
362 DEBUG_puts("2cupsGetResponse: Finishing chunked POST...");
363
364 if (httpWrite2(http, "", 0) < 0)
365 return (NULL);
366 }
367
368 /*
369 * Wait for a response from the server...
370 */
371
372 DEBUG_printf(("2cupsGetResponse: Update loop, http->status=%d...",
373 http->status));
374
375 do
376 {
377 status = httpUpdate(http);
378 }
379 while (status == HTTP_STATUS_CONTINUE);
380
381 DEBUG_printf(("2cupsGetResponse: status=%d", status));
382
383 if (status == HTTP_STATUS_OK)
384 {
385 /*
386 * Get the IPP response...
387 */
388
389 response = ippNew();
390
391 while ((state = ippRead(http, response)) != IPP_STATE_DATA)
392 if (state == IPP_STATE_ERROR)
393 break;
394
395 if (state == IPP_STATE_ERROR)
396 {
397 /*
398 * Flush remaining data and delete the response...
399 */
400
401 DEBUG_puts("1cupsGetResponse: IPP read error!");
402
403 httpFlush(http);
404
405 ippDelete(response);
406 response = NULL;
407
408 http->status = status = HTTP_STATUS_ERROR;
409 http->error = EINVAL;
410 }
411 }
412 else if (status != HTTP_STATUS_ERROR)
413 {
414 /*
415 * Flush any error message...
416 */
417
418 httpFlush(http);
419
420 /*
421 * Then handle encryption and authentication...
422 */
423
424 if (status == HTTP_STATUS_UNAUTHORIZED)
425 {
426 /*
427 * See if we can do authentication...
428 */
429
430 DEBUG_puts("2cupsGetResponse: Need authorization...");
431
432 if (!cupsDoAuthentication(http, "POST", resource))
433 httpReconnect2(http, 30000, NULL);
434 else
435 http->status = status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
436 }
437
438 #ifdef HAVE_SSL
439 else if (status == HTTP_STATUS_UPGRADE_REQUIRED)
440 {
441 /*
442 * Force a reconnect with encryption...
443 */
444
445 DEBUG_puts("2cupsGetResponse: Need encryption...");
446
447 if (!httpReconnect2(http, 30000, NULL))
448 httpEncryption(http, HTTP_ENCRYPTION_REQUIRED);
449 }
450 #endif /* HAVE_SSL */
451 }
452
453 if (response)
454 {
455 ipp_attribute_t *attr; /* status-message attribute */
456
457
458 attr = ippFindAttribute(response, "status-message", IPP_TAG_TEXT);
459
460 DEBUG_printf(("1cupsGetResponse: status-code=%s, status-message=\"%s\"",
461 ippErrorString(response->request.status.status_code),
462 attr ? attr->values[0].string.text : ""));
463
464 _cupsSetError(response->request.status.status_code,
465 attr ? attr->values[0].string.text :
466 ippErrorString(response->request.status.status_code), 0);
467 }
468
469 return (response);
470 }
471
472
473 /*
474 * 'cupsLastError()' - Return the last IPP status code received on the current
475 * thread.
476 */
477
478 ipp_status_t /* O - IPP status code from last request */
cupsLastError(void)479 cupsLastError(void)
480 {
481 return (_cupsGlobals()->last_error);
482 }
483
484
485 /*
486 * 'cupsLastErrorString()' - Return the last IPP status-message received on the
487 * current thread.
488 *
489 * @since CUPS 1.2/macOS 10.5@
490 */
491
492 const char * /* O - status-message text from last request */
cupsLastErrorString(void)493 cupsLastErrorString(void)
494 {
495 return (_cupsGlobals()->last_status_message);
496 }
497
498
499 /*
500 * '_cupsNextDelay()' - Return the next retry delay value.
501 *
502 * This function currently returns the Fibonacci sequence 1 1 2 3 5 8.
503 *
504 * Pass 0 for the current delay value to initialize the sequence.
505 */
506
507 int /* O - Next delay value */
_cupsNextDelay(int current,int * previous)508 _cupsNextDelay(int current, /* I - Current delay value or 0 */
509 int *previous) /* IO - Previous delay value */
510 {
511 int next; /* Next delay value */
512
513
514 if (current > 0)
515 {
516 next = (current + *previous) % 12;
517 *previous = next < current ? 0 : current;
518 }
519 else
520 {
521 next = 1;
522 *previous = 0;
523 }
524
525 return (next);
526 }
527
528
529 /*
530 * 'cupsReadResponseData()' - Read additional data after the IPP response.
531 *
532 * This function is used after @link cupsGetResponse@ to read the PPD or document
533 * files from @code CUPS_GET_PPD@ and @code CUPS_GET_DOCUMENT@ requests,
534 * respectively.
535 *
536 * @since CUPS 1.4/macOS 10.6@
537 */
538
539 ssize_t /* O - Bytes read, 0 on EOF, -1 on error */
cupsReadResponseData(http_t * http,char * buffer,size_t length)540 cupsReadResponseData(
541 http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
542 char *buffer, /* I - Buffer to use */
543 size_t length) /* I - Number of bytes to read */
544 {
545 /*
546 * Get the default connection as needed...
547 */
548
549 DEBUG_printf(("cupsReadResponseData(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length));
550
551 if (!http)
552 {
553 _cups_globals_t *cg = _cupsGlobals();
554 /* Pointer to library globals */
555
556 if ((http = cg->http) == NULL)
557 {
558 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No active connection"), 1);
559 return (-1);
560 }
561 }
562
563 /*
564 * Then read from the HTTP connection...
565 */
566
567 return (httpRead2(http, buffer, length));
568 }
569
570
571 /*
572 * 'cupsSendRequest()' - Send an IPP request.
573 *
574 * Use @link cupsWriteRequestData@ to write any additional data (document, PPD
575 * file, etc.) for the request, @link cupsGetResponse@ to get the IPP response,
576 * and @link cupsReadResponseData@ to read any additional data following the
577 * response. Only one request can be sent/queued at a time per @code http_t@
578 * connection.
579 *
580 * Returns the initial HTTP status code, which will be @code HTTP_STATUS_CONTINUE@
581 * on a successful send of the request.
582 *
583 * Note: Unlike @link cupsDoFileRequest@, @link cupsDoIORequest@, and
584 * @link cupsDoRequest@, the request is NOT freed with @link ippDelete@.
585 *
586 * @since CUPS 1.4/macOS 10.6@
587 */
588
589 http_status_t /* O - Initial HTTP status */
cupsSendRequest(http_t * http,ipp_t * request,const char * resource,size_t length)590 cupsSendRequest(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
591 ipp_t *request, /* I - IPP request */
592 const char *resource, /* I - Resource path */
593 size_t length) /* I - Length of data to follow or @code CUPS_LENGTH_VARIABLE@ */
594 {
595 http_status_t status; /* Status of HTTP request */
596 int got_status; /* Did we get the status? */
597 ipp_state_t state; /* State of IPP processing */
598 http_status_t expect; /* Expect: header to use */
599
600
601 DEBUG_printf(("cupsSendRequest(http=%p, request=%p(%s), resource=\"%s\", length=" CUPS_LLFMT ")", (void *)http, (void *)request, request ? ippOpString(request->request.op.operation_id) : "?", resource, CUPS_LLCAST length));
602
603 /*
604 * Range check input...
605 */
606
607 if (!request || !resource)
608 {
609 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0);
610
611 return (HTTP_STATUS_ERROR);
612 }
613
614 /*
615 * Get the default connection as needed...
616 */
617
618 if (!http)
619 if ((http = _cupsConnect()) == NULL)
620 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
621
622 /*
623 * If the prior request was not flushed out, do so now...
624 */
625
626 if (http->state == HTTP_STATE_GET_SEND ||
627 http->state == HTTP_STATE_POST_SEND)
628 {
629 DEBUG_puts("2cupsSendRequest: Flush prior response.");
630 httpFlush(http);
631 }
632 else if (http->state != HTTP_STATE_WAITING)
633 {
634 DEBUG_printf(("1cupsSendRequest: Unknown HTTP state (%d), "
635 "reconnecting.", http->state));
636 if (httpReconnect2(http, 30000, NULL))
637 return (HTTP_STATUS_ERROR);
638 }
639
640 #ifdef HAVE_SSL
641 /*
642 * See if we have an auth-info attribute and are communicating over
643 * a non-local link. If so, encrypt the link so that we can pass
644 * the authentication information securely...
645 */
646
647 if (ippFindAttribute(request, "auth-info", IPP_TAG_TEXT) &&
648 !httpAddrLocalhost(http->hostaddr) && !http->tls &&
649 httpEncryption(http, HTTP_ENCRYPTION_REQUIRED))
650 {
651 DEBUG_puts("1cupsSendRequest: Unable to encrypt connection.");
652 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
653 }
654 #endif /* HAVE_SSL */
655
656 /*
657 * Reconnect if the last response had a "Connection: close"...
658 */
659
660 if (!_cups_strcasecmp(http->fields[HTTP_FIELD_CONNECTION], "close"))
661 {
662 DEBUG_puts("2cupsSendRequest: Connection: close");
663 httpClearFields(http);
664 if (httpReconnect2(http, 30000, NULL))
665 {
666 DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
667 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
668 }
669 }
670
671 /*
672 * Loop until we can send the request without authorization problems.
673 */
674
675 expect = HTTP_STATUS_CONTINUE;
676
677 for (;;)
678 {
679 DEBUG_puts("2cupsSendRequest: Setup...");
680
681 /*
682 * Setup the HTTP variables needed...
683 */
684
685 httpClearFields(http);
686 httpSetExpect(http, expect);
687 httpSetField(http, HTTP_FIELD_CONTENT_TYPE, "application/ipp");
688 httpSetLength(http, length);
689
690 #ifdef HAVE_GSSAPI
691 if (http->authstring && !strncmp(http->authstring, "Negotiate", 9))
692 {
693 /*
694 * Do not use cached Kerberos credentials since they will look like a
695 * "replay" attack...
696 */
697
698 _cupsSetNegotiateAuthString(http, "POST", resource);
699 }
700 #endif /* HAVE_GSSAPI */
701
702 httpSetField(http, HTTP_FIELD_AUTHORIZATION, http->authstring);
703
704 DEBUG_printf(("2cupsSendRequest: authstring=\"%s\"", http->authstring));
705
706 /*
707 * Try the request...
708 */
709
710 DEBUG_puts("2cupsSendRequest: Sending HTTP POST...");
711
712 if (httpPost(http, resource))
713 {
714 DEBUG_puts("2cupsSendRequest: POST failed, reconnecting.");
715 if (httpReconnect2(http, 30000, NULL))
716 {
717 DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
718 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
719 }
720 else
721 continue;
722 }
723
724 /*
725 * Send the IPP data...
726 */
727
728 DEBUG_puts("2cupsSendRequest: Writing IPP request...");
729
730 request->state = IPP_STATE_IDLE;
731 status = HTTP_STATUS_CONTINUE;
732 got_status = 0;
733
734 while ((state = ippWrite(http, request)) != IPP_STATE_DATA)
735 {
736 if (httpCheck(http))
737 {
738 got_status = 1;
739
740 _httpUpdate(http, &status);
741 if (status >= HTTP_STATUS_MULTIPLE_CHOICES)
742 break;
743 }
744 else if (state == IPP_STATE_ERROR)
745 break;
746 }
747
748 if (state == IPP_STATE_ERROR)
749 {
750 /*
751 * We weren't able to send the IPP request. But did we already get a HTTP
752 * error status?
753 */
754
755 if (!got_status || status < HTTP_STATUS_MULTIPLE_CHOICES)
756 {
757 /*
758 * No, something else went wrong.
759 */
760
761 DEBUG_puts("1cupsSendRequest: Unable to send IPP request.");
762
763 http->status = HTTP_STATUS_ERROR;
764 http->state = HTTP_STATE_WAITING;
765
766 return (HTTP_STATUS_ERROR);
767 }
768 }
769
770 /*
771 * Wait up to 1 second to get the 100-continue response as needed...
772 */
773
774 if (!got_status)
775 {
776 if (expect == HTTP_STATUS_CONTINUE)
777 {
778 DEBUG_puts("2cupsSendRequest: Waiting for 100-continue...");
779
780 if (httpWait(http, 1000))
781 _httpUpdate(http, &status);
782 }
783 else if (httpCheck(http))
784 _httpUpdate(http, &status);
785 }
786
787 DEBUG_printf(("2cupsSendRequest: status=%d", status));
788
789 /*
790 * Process the current HTTP status...
791 */
792
793 if (status >= HTTP_STATUS_MULTIPLE_CHOICES)
794 {
795 int temp_status; /* Temporary status */
796
797 _cupsSetHTTPError(status);
798
799 do
800 {
801 temp_status = httpUpdate(http);
802 }
803 while (temp_status != HTTP_STATUS_ERROR &&
804 http->state == HTTP_STATE_POST_RECV);
805
806 httpFlush(http);
807 }
808
809 switch (status)
810 {
811 case HTTP_STATUS_CONTINUE :
812 case HTTP_STATUS_OK :
813 case HTTP_STATUS_ERROR :
814 DEBUG_printf(("1cupsSendRequest: Returning %d.", status));
815 return (status);
816
817 case HTTP_STATUS_UNAUTHORIZED :
818 if (cupsDoAuthentication(http, "POST", resource))
819 {
820 DEBUG_puts("1cupsSendRequest: Returning HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED.");
821 return (HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED);
822 }
823
824 DEBUG_puts("2cupsSendRequest: Reconnecting after HTTP_STATUS_UNAUTHORIZED.");
825
826 if (httpReconnect2(http, 30000, NULL))
827 {
828 DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
829 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
830 }
831 break;
832
833 #ifdef HAVE_SSL
834 case HTTP_STATUS_UPGRADE_REQUIRED :
835 /*
836 * Flush any error message, reconnect, and then upgrade with
837 * encryption...
838 */
839
840 DEBUG_puts("2cupsSendRequest: Reconnecting after "
841 "HTTP_STATUS_UPGRADE_REQUIRED.");
842
843 if (httpReconnect2(http, 30000, NULL))
844 {
845 DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
846 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
847 }
848
849 DEBUG_puts("2cupsSendRequest: Upgrading to TLS.");
850 if (httpEncryption(http, HTTP_ENCRYPTION_REQUIRED))
851 {
852 DEBUG_puts("1cupsSendRequest: Unable to encrypt connection.");
853 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
854 }
855 break;
856 #endif /* HAVE_SSL */
857
858 case HTTP_STATUS_EXPECTATION_FAILED :
859 /*
860 * Don't try using the Expect: header the next time around...
861 */
862
863 expect = (http_status_t)0;
864
865 DEBUG_puts("2cupsSendRequest: Reconnecting after "
866 "HTTP_EXPECTATION_FAILED.");
867
868 if (httpReconnect2(http, 30000, NULL))
869 {
870 DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
871 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
872 }
873 break;
874
875 default :
876 /*
877 * Some other error...
878 */
879
880 return (status);
881 }
882 }
883 }
884
885
886 /*
887 * 'cupsWriteRequestData()' - Write additional data after an IPP request.
888 *
889 * This function is used after @link cupsSendRequest@ to provide a PPD and
890 * after @link cupsStartDocument@ to provide a document file.
891 *
892 * @since CUPS 1.4/macOS 10.6@
893 */
894
895 http_status_t /* O - @code HTTP_STATUS_CONTINUE@ if OK or HTTP status on error */
cupsWriteRequestData(http_t * http,const char * buffer,size_t length)896 cupsWriteRequestData(
897 http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
898 const char *buffer, /* I - Bytes to write */
899 size_t length) /* I - Number of bytes to write */
900 {
901 int wused; /* Previous bytes in buffer */
902
903
904 /*
905 * Get the default connection as needed...
906 */
907
908 DEBUG_printf(("cupsWriteRequestData(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length));
909
910 if (!http)
911 {
912 _cups_globals_t *cg = _cupsGlobals();
913 /* Pointer to library globals */
914
915 if ((http = cg->http) == NULL)
916 {
917 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No active connection"), 1);
918 DEBUG_puts("1cupsWriteRequestData: Returning HTTP_STATUS_ERROR.");
919 return (HTTP_STATUS_ERROR);
920 }
921 }
922
923 /*
924 * Then write to the HTTP connection...
925 */
926
927 wused = http->wused;
928
929 if (httpWrite2(http, buffer, length) < 0)
930 {
931 DEBUG_puts("1cupsWriteRequestData: Returning HTTP_STATUS_ERROR.");
932 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(http->error), 0);
933 return (HTTP_STATUS_ERROR);
934 }
935
936 /*
937 * Finally, check if we have any pending data from the server...
938 */
939
940 if (length >= HTTP_MAX_BUFFER ||
941 http->wused < wused ||
942 (wused > 0 && (size_t)http->wused == length))
943 {
944 /*
945 * We've written something to the server, so check for response data...
946 */
947
948 if (_httpWait(http, 0, 1))
949 {
950 http_status_t status; /* Status from _httpUpdate */
951
952 _httpUpdate(http, &status);
953 if (status >= HTTP_STATUS_MULTIPLE_CHOICES)
954 {
955 _cupsSetHTTPError(status);
956
957 do
958 {
959 status = httpUpdate(http);
960 }
961 while (status != HTTP_STATUS_ERROR && http->state == HTTP_STATE_POST_RECV);
962
963 httpFlush(http);
964 }
965
966 DEBUG_printf(("1cupsWriteRequestData: Returning %d.\n", status));
967 return (status);
968 }
969 }
970
971 DEBUG_puts("1cupsWriteRequestData: Returning HTTP_STATUS_CONTINUE.");
972 return (HTTP_STATUS_CONTINUE);
973 }
974
975
976 /*
977 * '_cupsConnect()' - Get the default server connection...
978 */
979
980 http_t * /* O - HTTP connection */
_cupsConnect(void)981 _cupsConnect(void)
982 {
983 _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */
984
985
986 /*
987 * See if we are connected to the same server...
988 */
989
990 if (cg->http)
991 {
992 /*
993 * Compare the connection hostname, port, and encryption settings to
994 * the cached defaults; these were initialized the first time we
995 * connected...
996 */
997
998 if (strcmp(cg->http->hostname, cg->server) ||
999 cg->ipp_port != httpAddrPort(cg->http->hostaddr) ||
1000 (cg->http->encryption != cg->encryption &&
1001 cg->http->encryption == HTTP_ENCRYPTION_NEVER))
1002 {
1003 /*
1004 * Need to close the current connection because something has changed...
1005 */
1006
1007 httpClose(cg->http);
1008 cg->http = NULL;
1009 }
1010 else
1011 {
1012 /*
1013 * Same server, see if the connection is still established...
1014 */
1015
1016 char ch; /* Connection check byte */
1017 ssize_t n; /* Number of bytes */
1018
1019 #ifdef WIN32
1020 if ((n = recv(cg->http->fd, &ch, 1, MSG_PEEK)) == 0 ||
1021 (n < 0 && WSAGetLastError() != WSAEWOULDBLOCK))
1022 #else
1023 if ((n = recv(cg->http->fd, &ch, 1, MSG_PEEK | MSG_DONTWAIT)) == 0 ||
1024 (n < 0 && errno != EWOULDBLOCK))
1025 #endif /* WIN32 */
1026 {
1027 /*
1028 * Nope, close the connection...
1029 */
1030
1031 httpClose(cg->http);
1032 cg->http = NULL;
1033 }
1034 }
1035 }
1036
1037 /*
1038 * (Re)connect as needed...
1039 */
1040
1041 if (!cg->http)
1042 {
1043 if ((cg->http = httpConnect2(cupsServer(), ippPort(), NULL, AF_UNSPEC,
1044 cupsEncryption(), 1, 30000, NULL)) == NULL)
1045 {
1046 if (errno)
1047 _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, NULL, 0);
1048 else
1049 _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE,
1050 _("Unable to connect to host."), 1);
1051 }
1052 }
1053
1054 /*
1055 * Return the cached connection...
1056 */
1057
1058 return (cg->http);
1059 }
1060
1061
1062 /*
1063 * '_cupsSetError()' - Set the last IPP status code and status-message.
1064 */
1065
1066 void
_cupsSetError(ipp_status_t status,const char * message,int localize)1067 _cupsSetError(ipp_status_t status, /* I - IPP status code */
1068 const char *message, /* I - status-message value */
1069 int localize) /* I - Localize the message? */
1070 {
1071 _cups_globals_t *cg; /* Global data */
1072
1073
1074 if (!message && errno)
1075 {
1076 message = strerror(errno);
1077 localize = 0;
1078 }
1079
1080 cg = _cupsGlobals();
1081 cg->last_error = status;
1082
1083 if (cg->last_status_message)
1084 {
1085 _cupsStrFree(cg->last_status_message);
1086
1087 cg->last_status_message = NULL;
1088 }
1089
1090 if (message)
1091 {
1092 if (localize)
1093 {
1094 /*
1095 * Get the message catalog...
1096 */
1097
1098 if (!cg->lang_default)
1099 cg->lang_default = cupsLangDefault();
1100
1101 cg->last_status_message = _cupsStrAlloc(_cupsLangString(cg->lang_default,
1102 message));
1103 }
1104 else
1105 cg->last_status_message = _cupsStrAlloc(message);
1106 }
1107
1108 DEBUG_printf(("4_cupsSetError: last_error=%s, last_status_message=\"%s\"",
1109 ippErrorString(cg->last_error), cg->last_status_message));
1110 }
1111
1112
1113 /*
1114 * '_cupsSetHTTPError()' - Set the last error using the HTTP status.
1115 */
1116
1117 void
_cupsSetHTTPError(http_status_t status)1118 _cupsSetHTTPError(http_status_t status) /* I - HTTP status code */
1119 {
1120 switch (status)
1121 {
1122 case HTTP_STATUS_NOT_FOUND :
1123 _cupsSetError(IPP_STATUS_ERROR_NOT_FOUND, httpStatus(status), 0);
1124 break;
1125
1126 case HTTP_STATUS_UNAUTHORIZED :
1127 _cupsSetError(IPP_STATUS_ERROR_NOT_AUTHENTICATED, httpStatus(status), 0);
1128 break;
1129
1130 case HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED :
1131 _cupsSetError(IPP_STATUS_ERROR_CUPS_AUTHENTICATION_CANCELED, httpStatus(status), 0);
1132 break;
1133
1134 case HTTP_STATUS_FORBIDDEN :
1135 _cupsSetError(IPP_STATUS_ERROR_FORBIDDEN, httpStatus(status), 0);
1136 break;
1137
1138 case HTTP_STATUS_BAD_REQUEST :
1139 _cupsSetError(IPP_STATUS_ERROR_BAD_REQUEST, httpStatus(status), 0);
1140 break;
1141
1142 case HTTP_STATUS_REQUEST_TOO_LARGE :
1143 _cupsSetError(IPP_STATUS_ERROR_REQUEST_VALUE, httpStatus(status), 0);
1144 break;
1145
1146 case HTTP_STATUS_NOT_IMPLEMENTED :
1147 _cupsSetError(IPP_STATUS_ERROR_OPERATION_NOT_SUPPORTED, httpStatus(status), 0);
1148 break;
1149
1150 case HTTP_STATUS_NOT_SUPPORTED :
1151 _cupsSetError(IPP_STATUS_ERROR_VERSION_NOT_SUPPORTED, httpStatus(status), 0);
1152 break;
1153
1154 case HTTP_STATUS_UPGRADE_REQUIRED :
1155 _cupsSetError(IPP_STATUS_ERROR_CUPS_UPGRADE_REQUIRED, httpStatus(status), 0);
1156 break;
1157
1158 case HTTP_STATUS_CUPS_PKI_ERROR :
1159 _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, httpStatus(status), 0);
1160 break;
1161
1162 case HTTP_STATUS_ERROR :
1163 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0);
1164 break;
1165
1166 default :
1167 DEBUG_printf(("4_cupsSetHTTPError: HTTP error %d mapped to "
1168 "IPP_STATUS_ERROR_SERVICE_UNAVAILABLE!", status));
1169 _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, httpStatus(status), 0);
1170 break;
1171 }
1172 }
1173