1 /*
2 * IPP utilities for CUPS.
3 *
4 * Copyright 2007-2017 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 && (http = _cupsConnect()) == NULL)
135 {
136 ippDelete(request);
137
138 return (NULL);
139 }
140
141 /*
142 * See if we have a file to send...
143 */
144
145 if (infile >= 0)
146 {
147 if (fstat(infile, &fileinfo))
148 {
149 /*
150 * Can't get file information!
151 */
152
153 _cupsSetError(errno == EBADF ? IPP_STATUS_ERROR_NOT_FOUND : IPP_STATUS_ERROR_NOT_AUTHORIZED, NULL, 0);
154 ippDelete(request);
155
156 return (NULL);
157 }
158
159 #ifdef WIN32
160 if (fileinfo.st_mode & _S_IFDIR)
161 #else
162 if (S_ISDIR(fileinfo.st_mode))
163 #endif /* WIN32 */
164 {
165 /*
166 * Can't send a directory...
167 */
168
169 _cupsSetError(IPP_STATUS_ERROR_NOT_POSSIBLE, strerror(EISDIR), 0);
170 ippDelete(request);
171
172 return (NULL);
173 }
174
175 #ifndef WIN32
176 if (!S_ISREG(fileinfo.st_mode))
177 length = 0; /* Chunk when piping */
178 else
179 #endif /* !WIN32 */
180 length = ippLength(request) + (size_t)fileinfo.st_size;
181 }
182 else
183 length = ippLength(request);
184
185 DEBUG_printf(("2cupsDoIORequest: Request length=%ld, total length=%ld", (long)ippLength(request), (long)length));
186
187 /*
188 * Clear any "Local" authentication data since it is probably stale...
189 */
190
191 if (http->authstring && !strncmp(http->authstring, "Local ", 6))
192 httpSetAuthString(http, NULL, NULL);
193
194 /*
195 * Loop until we can send the request without authorization problems.
196 */
197
198 while (response == NULL)
199 {
200 DEBUG_puts("2cupsDoIORequest: setup...");
201
202 /*
203 * Send the request...
204 */
205
206 status = cupsSendRequest(http, request, resource, length);
207
208 DEBUG_printf(("2cupsDoIORequest: status=%d", status));
209
210 if (status == HTTP_STATUS_CONTINUE && request->state == IPP_STATE_DATA && infile >= 0)
211 {
212 DEBUG_puts("2cupsDoIORequest: file write...");
213
214 /*
215 * Send the file with the request...
216 */
217
218 #ifndef WIN32
219 if (S_ISREG(fileinfo.st_mode))
220 #endif /* WIN32 */
221 lseek(infile, 0, SEEK_SET);
222
223 while ((bytes = read(infile, buffer, sizeof(buffer))) > 0)
224 {
225 if ((status = cupsWriteRequestData(http, buffer, (size_t)bytes))
226 != HTTP_STATUS_CONTINUE)
227 break;
228 }
229 }
230
231 /*
232 * Get the server's response...
233 */
234
235 if (status <= HTTP_STATUS_CONTINUE || status == HTTP_STATUS_OK)
236 {
237 response = cupsGetResponse(http, resource);
238 status = httpGetStatus(http);
239 }
240
241 DEBUG_printf(("2cupsDoIORequest: status=%d", status));
242
243 if (status == HTTP_STATUS_ERROR ||
244 (status >= HTTP_STATUS_BAD_REQUEST && status != HTTP_STATUS_UNAUTHORIZED &&
245 status != HTTP_STATUS_UPGRADE_REQUIRED))
246 {
247 _cupsSetHTTPError(status);
248 break;
249 }
250
251 if (response && outfile >= 0)
252 {
253 /*
254 * Write trailing data to file...
255 */
256
257 while ((bytes = httpRead2(http, buffer, sizeof(buffer))) > 0)
258 if (write(outfile, buffer, (size_t)bytes) < bytes)
259 break;
260 }
261
262 if (http->state != HTTP_STATE_WAITING)
263 {
264 /*
265 * Flush any remaining data...
266 */
267
268 httpFlush(http);
269 }
270 }
271
272 /*
273 * Delete the original request and return the response...
274 */
275
276 ippDelete(request);
277
278 return (response);
279 }
280
281
282 /*
283 * 'cupsDoRequest()' - Do an IPP request.
284 *
285 * This function sends the IPP request to the specified server, retrying
286 * and authenticating as necessary. The request is freed with @link ippDelete@.
287 */
288
289 ipp_t * /* O - Response data */
cupsDoRequest(http_t * http,ipp_t * request,const char * resource)290 cupsDoRequest(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
291 ipp_t *request, /* I - IPP request */
292 const char *resource) /* I - HTTP resource for POST */
293 {
294 DEBUG_printf(("cupsDoRequest(http=%p, request=%p(%s), resource=\"%s\")", (void *)http, (void *)request, request ? ippOpString(request->request.op.operation_id) : "?", resource));
295
296 return (cupsDoIORequest(http, request, resource, -1, -1));
297 }
298
299
300 /*
301 * 'cupsGetResponse()' - Get a response to an IPP request.
302 *
303 * Use this function to get the response for an IPP request sent using
304 * @link cupsSendRequest@. For requests that return additional data, use
305 * @link cupsReadResponseData@ after getting a successful response,
306 * otherwise call @link httpFlush@ to complete the response processing.
307 *
308 * @since CUPS 1.4/macOS 10.6@
309 */
310
311 ipp_t * /* O - Response or @code NULL@ on HTTP error */
cupsGetResponse(http_t * http,const char * resource)312 cupsGetResponse(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
313 const char *resource) /* I - HTTP resource for POST */
314 {
315 http_status_t status; /* HTTP status */
316 ipp_state_t state; /* IPP read state */
317 ipp_t *response = NULL; /* IPP response */
318
319
320 DEBUG_printf(("cupsGetResponse(http=%p, resource=\"%s\")", (void *)http, resource));
321 DEBUG_printf(("1cupsGetResponse: http->state=%d", http ? http->state : HTTP_STATE_ERROR));
322
323 /*
324 * Connect to the default server as needed...
325 */
326
327 if (!http)
328 {
329 _cups_globals_t *cg = _cupsGlobals();
330 /* Pointer to library globals */
331
332 if ((http = cg->http) == NULL)
333 {
334 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No active connection."), 1);
335 DEBUG_puts("1cupsGetResponse: No active connection - returning NULL.");
336 return (NULL);
337 }
338 }
339
340 if (http->state != HTTP_STATE_POST_RECV && http->state != HTTP_STATE_POST_SEND)
341 {
342 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No request sent."), 1);
343 DEBUG_puts("1cupsGetResponse: Not in POST state - returning NULL.");
344 return (NULL);
345 }
346
347 /*
348 * Check for an unfinished chunked request...
349 */
350
351 if (http->data_encoding == HTTP_ENCODING_CHUNKED)
352 {
353 /*
354 * Send a 0-length chunk to finish off the request...
355 */
356
357 DEBUG_puts("2cupsGetResponse: Finishing chunked POST...");
358
359 if (httpWrite2(http, "", 0) < 0)
360 return (NULL);
361 }
362
363 /*
364 * Wait for a response from the server...
365 */
366
367 DEBUG_printf(("2cupsGetResponse: Update loop, http->status=%d...",
368 http->status));
369
370 do
371 {
372 status = httpUpdate(http);
373 }
374 while (status == HTTP_STATUS_CONTINUE);
375
376 DEBUG_printf(("2cupsGetResponse: status=%d", status));
377
378 if (status == HTTP_STATUS_OK)
379 {
380 /*
381 * Get the IPP response...
382 */
383
384 response = ippNew();
385
386 while ((state = ippRead(http, response)) != IPP_STATE_DATA)
387 if (state == IPP_STATE_ERROR)
388 break;
389
390 if (state == IPP_STATE_ERROR)
391 {
392 /*
393 * Flush remaining data and delete the response...
394 */
395
396 DEBUG_puts("1cupsGetResponse: IPP read error!");
397
398 httpFlush(http);
399
400 ippDelete(response);
401 response = NULL;
402
403 http->status = status = HTTP_STATUS_ERROR;
404 http->error = EINVAL;
405 }
406 }
407 else if (status != HTTP_STATUS_ERROR)
408 {
409 /*
410 * Flush any error message...
411 */
412
413 httpFlush(http);
414
415 /*
416 * Then handle encryption and authentication...
417 */
418
419 if (status == HTTP_STATUS_UNAUTHORIZED)
420 {
421 /*
422 * See if we can do authentication...
423 */
424
425 DEBUG_puts("2cupsGetResponse: Need authorization...");
426
427 if (!cupsDoAuthentication(http, "POST", resource))
428 httpReconnect2(http, 30000, NULL);
429 else
430 http->status = status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
431 }
432
433 #ifdef HAVE_SSL
434 else if (status == HTTP_STATUS_UPGRADE_REQUIRED)
435 {
436 /*
437 * Force a reconnect with encryption...
438 */
439
440 DEBUG_puts("2cupsGetResponse: Need encryption...");
441
442 if (!httpReconnect2(http, 30000, NULL))
443 httpEncryption(http, HTTP_ENCRYPTION_REQUIRED);
444 }
445 #endif /* HAVE_SSL */
446 }
447
448 if (response)
449 {
450 ipp_attribute_t *attr; /* status-message attribute */
451
452
453 attr = ippFindAttribute(response, "status-message", IPP_TAG_TEXT);
454
455 DEBUG_printf(("1cupsGetResponse: status-code=%s, status-message=\"%s\"",
456 ippErrorString(response->request.status.status_code),
457 attr ? attr->values[0].string.text : ""));
458
459 _cupsSetError(response->request.status.status_code,
460 attr ? attr->values[0].string.text :
461 ippErrorString(response->request.status.status_code), 0);
462 }
463
464 return (response);
465 }
466
467
468 /*
469 * 'cupsLastError()' - Return the last IPP status code received on the current
470 * thread.
471 */
472
473 ipp_status_t /* O - IPP status code from last request */
cupsLastError(void)474 cupsLastError(void)
475 {
476 return (_cupsGlobals()->last_error);
477 }
478
479
480 /*
481 * 'cupsLastErrorString()' - Return the last IPP status-message received on the
482 * current thread.
483 *
484 * @since CUPS 1.2/macOS 10.5@
485 */
486
487 const char * /* O - status-message text from last request */
cupsLastErrorString(void)488 cupsLastErrorString(void)
489 {
490 return (_cupsGlobals()->last_status_message);
491 }
492
493
494 /*
495 * '_cupsNextDelay()' - Return the next retry delay value.
496 *
497 * This function currently returns the Fibonacci sequence 1 1 2 3 5 8.
498 *
499 * Pass 0 for the current delay value to initialize the sequence.
500 */
501
502 int /* O - Next delay value */
_cupsNextDelay(int current,int * previous)503 _cupsNextDelay(int current, /* I - Current delay value or 0 */
504 int *previous) /* IO - Previous delay value */
505 {
506 int next; /* Next delay value */
507
508
509 if (current > 0)
510 {
511 next = (current + *previous) % 12;
512 *previous = next < current ? 0 : current;
513 }
514 else
515 {
516 next = 1;
517 *previous = 0;
518 }
519
520 return (next);
521 }
522
523
524 /*
525 * 'cupsReadResponseData()' - Read additional data after the IPP response.
526 *
527 * This function is used after @link cupsGetResponse@ to read the PPD or document
528 * files from @code CUPS_GET_PPD@ and @code CUPS_GET_DOCUMENT@ requests,
529 * respectively.
530 *
531 * @since CUPS 1.4/macOS 10.6@
532 */
533
534 ssize_t /* O - Bytes read, 0 on EOF, -1 on error */
cupsReadResponseData(http_t * http,char * buffer,size_t length)535 cupsReadResponseData(
536 http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
537 char *buffer, /* I - Buffer to use */
538 size_t length) /* I - Number of bytes to read */
539 {
540 /*
541 * Get the default connection as needed...
542 */
543
544 DEBUG_printf(("cupsReadResponseData(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length));
545
546 if (!http)
547 {
548 _cups_globals_t *cg = _cupsGlobals();
549 /* Pointer to library globals */
550
551 if ((http = cg->http) == NULL)
552 {
553 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No active connection"), 1);
554 return (-1);
555 }
556 }
557
558 /*
559 * Then read from the HTTP connection...
560 */
561
562 return (httpRead2(http, buffer, length));
563 }
564
565
566 /*
567 * 'cupsSendRequest()' - Send an IPP request.
568 *
569 * Use @link cupsWriteRequestData@ to write any additional data (document, PPD
570 * file, etc.) for the request, @link cupsGetResponse@ to get the IPP response,
571 * and @link cupsReadResponseData@ to read any additional data following the
572 * response. Only one request can be sent/queued at a time per @code http_t@
573 * connection.
574 *
575 * Returns the initial HTTP status code, which will be @code HTTP_STATUS_CONTINUE@
576 * on a successful send of the request.
577 *
578 * Note: Unlike @link cupsDoFileRequest@, @link cupsDoIORequest@, and
579 * @link cupsDoRequest@, the request is NOT freed with @link ippDelete@.
580 *
581 * @since CUPS 1.4/macOS 10.6@
582 */
583
584 http_status_t /* O - Initial HTTP status */
cupsSendRequest(http_t * http,ipp_t * request,const char * resource,size_t length)585 cupsSendRequest(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
586 ipp_t *request, /* I - IPP request */
587 const char *resource, /* I - Resource path */
588 size_t length) /* I - Length of data to follow or @code CUPS_LENGTH_VARIABLE@ */
589 {
590 http_status_t status; /* Status of HTTP request */
591 int got_status; /* Did we get the status? */
592 ipp_state_t state; /* State of IPP processing */
593 http_status_t expect; /* Expect: header to use */
594 char date[256]; /* Date: header value */
595
596
597 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));
598
599 /*
600 * Range check input...
601 */
602
603 if (!request || !resource)
604 {
605 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0);
606
607 return (HTTP_STATUS_ERROR);
608 }
609
610 /*
611 * Get the default connection as needed...
612 */
613
614 if (!http && (http = _cupsConnect()) == NULL)
615 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
616
617 /*
618 * If the prior request was not flushed out, do so now...
619 */
620
621 if (http->state == HTTP_STATE_GET_SEND ||
622 http->state == HTTP_STATE_POST_SEND)
623 {
624 DEBUG_puts("2cupsSendRequest: Flush prior response.");
625 httpFlush(http);
626 }
627 else if (http->state != HTTP_STATE_WAITING)
628 {
629 DEBUG_printf(("1cupsSendRequest: Unknown HTTP state (%d), "
630 "reconnecting.", http->state));
631 if (httpReconnect2(http, 30000, NULL))
632 return (HTTP_STATUS_ERROR);
633 }
634
635 #ifdef HAVE_SSL
636 /*
637 * See if we have an auth-info attribute and are communicating over
638 * a non-local link. If so, encrypt the link so that we can pass
639 * the authentication information securely...
640 */
641
642 if (ippFindAttribute(request, "auth-info", IPP_TAG_TEXT) &&
643 !httpAddrLocalhost(http->hostaddr) && !http->tls &&
644 httpEncryption(http, HTTP_ENCRYPTION_REQUIRED))
645 {
646 DEBUG_puts("1cupsSendRequest: Unable to encrypt connection.");
647 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
648 }
649 #endif /* HAVE_SSL */
650
651 /*
652 * Reconnect if the last response had a "Connection: close"...
653 */
654
655 if (!_cups_strcasecmp(http->fields[HTTP_FIELD_CONNECTION], "close"))
656 {
657 DEBUG_puts("2cupsSendRequest: Connection: close");
658 httpClearFields(http);
659 if (httpReconnect2(http, 30000, NULL))
660 {
661 DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
662 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
663 }
664 }
665
666 /*
667 * Loop until we can send the request without authorization problems.
668 */
669
670 expect = HTTP_STATUS_CONTINUE;
671
672 for (;;)
673 {
674 DEBUG_puts("2cupsSendRequest: Setup...");
675
676 /*
677 * Setup the HTTP variables needed...
678 */
679
680 httpClearFields(http);
681 httpSetExpect(http, expect);
682 httpSetField(http, HTTP_FIELD_CONTENT_TYPE, "application/ipp");
683 httpSetField(http, HTTP_FIELD_DATE, httpGetDateString2(time(NULL), date, (int)sizeof(date)));
684 httpSetLength(http, length);
685
686 #ifdef HAVE_GSSAPI
687 if (http->authstring && !strncmp(http->authstring, "Negotiate", 9))
688 {
689 /*
690 * Do not use cached Kerberos credentials since they will look like a
691 * "replay" attack...
692 */
693
694 _cupsSetNegotiateAuthString(http, "POST", resource);
695 }
696 #endif /* HAVE_GSSAPI */
697
698 httpSetField(http, HTTP_FIELD_AUTHORIZATION, http->authstring);
699
700 DEBUG_printf(("2cupsSendRequest: authstring=\"%s\"", http->authstring));
701
702 /*
703 * Try the request...
704 */
705
706 DEBUG_puts("2cupsSendRequest: Sending HTTP POST...");
707
708 if (httpPost(http, resource))
709 {
710 DEBUG_puts("2cupsSendRequest: POST failed, reconnecting.");
711 if (httpReconnect2(http, 30000, NULL))
712 {
713 DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
714 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
715 }
716 else
717 continue;
718 }
719
720 /*
721 * Send the IPP data...
722 */
723
724 DEBUG_puts("2cupsSendRequest: Writing IPP request...");
725
726 request->state = IPP_STATE_IDLE;
727 status = HTTP_STATUS_CONTINUE;
728 got_status = 0;
729
730 while ((state = ippWrite(http, request)) != IPP_STATE_DATA)
731 {
732 if (httpCheck(http))
733 {
734 got_status = 1;
735
736 _httpUpdate(http, &status);
737 if (status >= HTTP_STATUS_MULTIPLE_CHOICES)
738 break;
739 }
740 else if (state == IPP_STATE_ERROR)
741 break;
742 }
743
744 if (state == IPP_STATE_ERROR)
745 {
746 /*
747 * We weren't able to send the IPP request. But did we already get a HTTP
748 * error status?
749 */
750
751 if (!got_status || status < HTTP_STATUS_MULTIPLE_CHOICES)
752 {
753 /*
754 * No, something else went wrong.
755 */
756
757 DEBUG_puts("1cupsSendRequest: Unable to send IPP request.");
758
759 http->status = HTTP_STATUS_ERROR;
760 http->state = HTTP_STATE_WAITING;
761
762 return (HTTP_STATUS_ERROR);
763 }
764 }
765
766 /*
767 * Wait up to 1 second to get the 100-continue response as needed...
768 */
769
770 if (!got_status)
771 {
772 if (expect == HTTP_STATUS_CONTINUE)
773 {
774 DEBUG_puts("2cupsSendRequest: Waiting for 100-continue...");
775
776 if (httpWait(http, 1000))
777 _httpUpdate(http, &status);
778 }
779 else if (httpCheck(http))
780 _httpUpdate(http, &status);
781 }
782
783 DEBUG_printf(("2cupsSendRequest: status=%d", status));
784
785 /*
786 * Process the current HTTP status...
787 */
788
789 if (status >= HTTP_STATUS_MULTIPLE_CHOICES)
790 {
791 int temp_status; /* Temporary status */
792
793 _cupsSetHTTPError(status);
794
795 do
796 {
797 temp_status = httpUpdate(http);
798 }
799 while (temp_status != HTTP_STATUS_ERROR &&
800 http->state == HTTP_STATE_POST_RECV);
801
802 httpFlush(http);
803 }
804
805 switch (status)
806 {
807 case HTTP_STATUS_CONTINUE :
808 case HTTP_STATUS_OK :
809 case HTTP_STATUS_ERROR :
810 DEBUG_printf(("1cupsSendRequest: Returning %d.", status));
811 return (status);
812
813 case HTTP_STATUS_UNAUTHORIZED :
814 if (cupsDoAuthentication(http, "POST", resource))
815 {
816 DEBUG_puts("1cupsSendRequest: Returning HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED.");
817 return (HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED);
818 }
819
820 DEBUG_puts("2cupsSendRequest: Reconnecting after HTTP_STATUS_UNAUTHORIZED.");
821
822 if (httpReconnect2(http, 30000, NULL))
823 {
824 DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
825 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
826 }
827 break;
828
829 #ifdef HAVE_SSL
830 case HTTP_STATUS_UPGRADE_REQUIRED :
831 /*
832 * Flush any error message, reconnect, and then upgrade with
833 * encryption...
834 */
835
836 DEBUG_puts("2cupsSendRequest: Reconnecting after "
837 "HTTP_STATUS_UPGRADE_REQUIRED.");
838
839 if (httpReconnect2(http, 30000, NULL))
840 {
841 DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
842 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
843 }
844
845 DEBUG_puts("2cupsSendRequest: Upgrading to TLS.");
846 if (httpEncryption(http, HTTP_ENCRYPTION_REQUIRED))
847 {
848 DEBUG_puts("1cupsSendRequest: Unable to encrypt connection.");
849 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
850 }
851 break;
852 #endif /* HAVE_SSL */
853
854 case HTTP_STATUS_EXPECTATION_FAILED :
855 /*
856 * Don't try using the Expect: header the next time around...
857 */
858
859 expect = (http_status_t)0;
860
861 DEBUG_puts("2cupsSendRequest: Reconnecting after "
862 "HTTP_EXPECTATION_FAILED.");
863
864 if (httpReconnect2(http, 30000, NULL))
865 {
866 DEBUG_puts("1cupsSendRequest: Unable to reconnect.");
867 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
868 }
869 break;
870
871 default :
872 /*
873 * Some other error...
874 */
875
876 return (status);
877 }
878 }
879 }
880
881
882 /*
883 * 'cupsWriteRequestData()' - Write additional data after an IPP request.
884 *
885 * This function is used after @link cupsSendRequest@ to provide a PPD and
886 * after @link cupsStartDocument@ to provide a document file.
887 *
888 * @since CUPS 1.4/macOS 10.6@
889 */
890
891 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)892 cupsWriteRequestData(
893 http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
894 const char *buffer, /* I - Bytes to write */
895 size_t length) /* I - Number of bytes to write */
896 {
897 int wused; /* Previous bytes in buffer */
898
899
900 /*
901 * Get the default connection as needed...
902 */
903
904 DEBUG_printf(("cupsWriteRequestData(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length));
905
906 if (!http)
907 {
908 _cups_globals_t *cg = _cupsGlobals();
909 /* Pointer to library globals */
910
911 if ((http = cg->http) == NULL)
912 {
913 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No active connection"), 1);
914 DEBUG_puts("1cupsWriteRequestData: Returning HTTP_STATUS_ERROR.");
915 return (HTTP_STATUS_ERROR);
916 }
917 }
918
919 /*
920 * Then write to the HTTP connection...
921 */
922
923 wused = http->wused;
924
925 if (httpWrite2(http, buffer, length) < 0)
926 {
927 DEBUG_puts("1cupsWriteRequestData: Returning HTTP_STATUS_ERROR.");
928 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(http->error), 0);
929 return (HTTP_STATUS_ERROR);
930 }
931
932 /*
933 * Finally, check if we have any pending data from the server...
934 */
935
936 if (length >= HTTP_MAX_BUFFER ||
937 http->wused < wused ||
938 (wused > 0 && (size_t)http->wused == length))
939 {
940 /*
941 * We've written something to the server, so check for response data...
942 */
943
944 if (_httpWait(http, 0, 1))
945 {
946 http_status_t status; /* Status from _httpUpdate */
947
948 _httpUpdate(http, &status);
949 if (status >= HTTP_STATUS_MULTIPLE_CHOICES)
950 {
951 _cupsSetHTTPError(status);
952
953 do
954 {
955 status = httpUpdate(http);
956 }
957 while (status != HTTP_STATUS_ERROR && http->state == HTTP_STATE_POST_RECV);
958
959 httpFlush(http);
960 }
961
962 DEBUG_printf(("1cupsWriteRequestData: Returning %d.\n", status));
963 return (status);
964 }
965 }
966
967 DEBUG_puts("1cupsWriteRequestData: Returning HTTP_STATUS_CONTINUE.");
968 return (HTTP_STATUS_CONTINUE);
969 }
970
971
972 /*
973 * '_cupsConnect()' - Get the default server connection...
974 */
975
976 http_t * /* O - HTTP connection */
_cupsConnect(void)977 _cupsConnect(void)
978 {
979 _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */
980
981
982 /*
983 * See if we are connected to the same server...
984 */
985
986 if (cg->http)
987 {
988 /*
989 * Compare the connection hostname, port, and encryption settings to
990 * the cached defaults; these were initialized the first time we
991 * connected...
992 */
993
994 if (strcmp(cg->http->hostname, cg->server) ||
995 #ifdef AF_LOCAL
996 (httpAddrFamily(cg->http->hostaddr) != AF_LOCAL && cg->ipp_port != httpAddrPort(cg->http->hostaddr)) ||
997 #else
998 cg->ipp_port != httpAddrPort(cg->http->hostaddr) ||
999 #endif /* AF_LOCAL */
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