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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) | |
287 | { | |
288 | if (outfile >= 0) | |
289 | { | |
290 | /* | |
291 | * Write trailing data to file... | |
292 | */ | |
293 | ||
294 | while ((bytes = (int)httpRead2(http, buffer, sizeof(buffer))) > 0) | |
295 | if (write(outfile, buffer, bytes) < bytes) | |
296 | break; | |
297 | } | |
298 | else | |
299 | { | |
300 | /* | |
301 | * Flush any remaining data... | |
302 | */ | |
303 | ||
304 | httpFlush(http); | |
305 | } | |
306 | } | |
307 | } | |
308 | ||
309 | /* | |
310 | * Delete the original request and return the response... | |
311 | */ | |
312 | ||
313 | ippDelete(request); | |
314 | ||
315 | return (response); | |
316 | } | |
317 | ||
318 | ||
319 | /* | |
320 | * 'cupsDoRequest()' - Do an IPP request. | |
321 | * | |
322 | * This function sends the IPP request to the specified server, retrying | |
323 | * and authenticating as necessary. The request is freed with ippDelete() | |
324 | * after receiving a valid IPP response. | |
325 | */ | |
326 | ||
327 | ipp_t * /* O - Response data */ | |
328 | cupsDoRequest(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ | |
329 | ipp_t *request, /* I - IPP request */ | |
330 | const char *resource) /* I - HTTP resource for POST */ | |
331 | { | |
332 | DEBUG_printf(("cupsDoRequest(http=%p, request=%p(%s), resource=\"%s\")", | |
333 | http, request, | |
334 | request ? ippOpString(request->request.op.operation_id) : "?", | |
335 | resource)); | |
336 | ||
337 | return (cupsDoIORequest(http, request, resource, -1, -1)); | |
338 | } | |
339 | ||
340 | ||
341 | /* | |
342 | * 'cupsGetResponse()' - Get a response to an IPP request. | |
343 | * | |
344 | * Use this function to get the response for an IPP request sent using | |
345 | * cupsSendDocument() or cupsSendRequest(). For requests that return | |
346 | * additional data, use httpRead() after getting a successful response, | |
347 | * otherwise call httpFlush() to complete the response processing. | |
348 | * | |
349 | * @since CUPS 1.4/Mac OS X 10.6@ | |
350 | */ | |
351 | ||
352 | ipp_t * /* O - Response or @code NULL@ on HTTP error */ | |
353 | cupsGetResponse(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ | |
354 | const char *resource) /* I - HTTP resource for POST */ | |
355 | { | |
356 | http_status_t status; /* HTTP status */ | |
357 | ipp_state_t state; /* IPP read state */ | |
358 | ipp_t *response = NULL; /* IPP response */ | |
359 | ||
360 | ||
361 | DEBUG_printf(("cupsGetResponse(http=%p, resource=\"%s\")", http, resource)); | |
362 | ||
363 | /* | |
364 | * Connect to the default server as needed... | |
365 | */ | |
366 | ||
367 | if (!http) | |
368 | http = _cupsConnect(); | |
369 | ||
370 | if (!http || (http->state != HTTP_POST_RECV && http->state != HTTP_POST_SEND)) | |
371 | return (NULL); | |
372 | ||
373 | /* | |
374 | * Check for an unfinished chunked request... | |
375 | */ | |
376 | ||
377 | if (http->data_encoding == HTTP_ENCODE_CHUNKED) | |
378 | { | |
379 | /* | |
380 | * Send a 0-length chunk to finish off the request... | |
381 | */ | |
382 | ||
383 | DEBUG_puts("2cupsGetResponse: Finishing chunked POST..."); | |
384 | ||
385 | if (httpWrite2(http, "", 0) < 0) | |
386 | return (NULL); | |
387 | } | |
388 | ||
389 | /* | |
390 | * Wait for a response from the server... | |
391 | */ | |
392 | ||
393 | DEBUG_printf(("2cupsGetResponse: Update loop, http->status=%d...", | |
394 | http->status)); | |
395 | ||
396 | do | |
397 | { | |
398 | status = httpUpdate(http); | |
399 | } | |
400 | while (status != HTTP_ERROR && http->state == HTTP_POST_RECV); | |
401 | ||
402 | DEBUG_printf(("2cupsGetResponse: status=%d", status)); | |
403 | ||
404 | if (status == HTTP_OK) | |
405 | { | |
406 | /* | |
407 | * Get the IPP response... | |
408 | */ | |
409 | ||
410 | response = ippNew(); | |
411 | ||
412 | while ((state = ippRead(http, response)) != IPP_DATA) | |
413 | if (state == IPP_ERROR) | |
414 | break; | |
415 | ||
416 | if (state == IPP_ERROR) | |
417 | { | |
418 | /* | |
419 | * Flush remaining data and delete the response... | |
420 | */ | |
421 | ||
422 | DEBUG_puts("1cupsGetResponse: IPP read error!"); | |
423 | ||
424 | httpFlush(http); | |
425 | ||
426 | ippDelete(response); | |
427 | response = NULL; | |
428 | ||
429 | _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0); | |
430 | http->status = status = HTTP_ERROR; | |
431 | http->error = EIO; | |
432 | } | |
433 | } | |
434 | else if (status != HTTP_ERROR) | |
435 | { | |
436 | /* | |
437 | * Flush any error message... | |
438 | */ | |
439 | ||
440 | httpFlush(http); | |
441 | ||
442 | /* | |
443 | * Then handle encryption and authentication... | |
444 | */ | |
445 | ||
446 | if (status == HTTP_UNAUTHORIZED) | |
447 | { | |
448 | /* | |
449 | * See if we can do authentication... | |
450 | */ | |
451 | ||
452 | DEBUG_puts("2cupsGetResponse: Need authorization..."); | |
453 | ||
454 | if (!cupsDoAuthentication(http, "POST", resource)) | |
455 | httpReconnect(http); | |
456 | else | |
457 | http->status = status = HTTP_AUTHORIZATION_CANCELED; | |
458 | } | |
459 | ||
460 | #ifdef HAVE_SSL | |
461 | else if (status == HTTP_UPGRADE_REQUIRED) | |
462 | { | |
463 | /* | |
464 | * Force a reconnect with encryption... | |
465 | */ | |
466 | ||
467 | DEBUG_puts("2cupsGetResponse: Need encryption..."); | |
468 | ||
469 | if (!httpReconnect(http)) | |
470 | httpEncryption(http, HTTP_ENCRYPT_REQUIRED); | |
471 | } | |
472 | #endif /* HAVE_SSL */ | |
473 | } | |
474 | ||
475 | if (response) | |
476 | { | |
477 | ipp_attribute_t *attr; /* status-message attribute */ | |
478 | ||
479 | ||
480 | attr = ippFindAttribute(response, "status-message", IPP_TAG_TEXT); | |
481 | ||
482 | DEBUG_printf(("1cupsGetResponse: status-code=%s, status-message=\"%s\"", | |
483 | ippErrorString(response->request.status.status_code), | |
484 | attr ? attr->values[0].string.text : "")); | |
485 | ||
486 | _cupsSetError(response->request.status.status_code, | |
487 | attr ? attr->values[0].string.text : | |
488 | ippErrorString(response->request.status.status_code), 0); | |
489 | } | |
490 | else if (status != HTTP_OK) | |
491 | _cupsSetHTTPError(status); | |
492 | ||
493 | return (response); | |
494 | } | |
495 | ||
496 | ||
497 | /* | |
498 | * 'cupsLastError()' - Return the last IPP status code. | |
499 | */ | |
500 | ||
501 | ipp_status_t /* O - IPP status code from last request */ | |
502 | cupsLastError(void) | |
503 | { | |
504 | return (_cupsGlobals()->last_error); | |
505 | } | |
506 | ||
507 | ||
508 | /* | |
509 | * 'cupsLastErrorString()' - Return the last IPP status-message. | |
510 | * | |
511 | * @since CUPS 1.2/Mac OS X 10.5@ | |
512 | */ | |
513 | ||
514 | const char * /* O - status-message text from last request */ | |
515 | cupsLastErrorString(void) | |
516 | { | |
517 | return (_cupsGlobals()->last_status_message); | |
518 | } | |
519 | ||
520 | ||
521 | /* | |
522 | * '_cupsNextDelay()' - Return the next retry delay value. | |
523 | * | |
524 | * This function currently returns the Fibonacci sequence 1 1 2 3 5 8. | |
525 | * | |
526 | * Pass 0 for the current delay value to initialize the sequence. | |
527 | */ | |
528 | ||
529 | int /* O - Next delay value */ | |
530 | _cupsNextDelay(int current, /* I - Current delay value or 0 */ | |
531 | int *previous) /* IO - Previous delay value */ | |
532 | { | |
533 | int next; /* Next delay value */ | |
534 | ||
535 | ||
536 | if (current > 0) | |
537 | { | |
538 | next = (current + *previous) % 12; | |
539 | *previous = next < current ? 0 : current; | |
540 | } | |
541 | else | |
542 | { | |
543 | next = 1; | |
544 | *previous = 0; | |
545 | } | |
546 | ||
547 | return (next); | |
548 | } | |
549 | ||
550 | ||
551 | /* | |
552 | * 'cupsReadResponseData()' - Read additional data after the IPP response. | |
553 | * | |
554 | * This function is used after cupsGetResponse() to read the PPD or document | |
555 | * files for CUPS_GET_PPD and CUPS_GET_DOCUMENT requests, respectively. | |
556 | * | |
557 | * @since CUPS 1.4/Mac OS X 10.6@ | |
558 | */ | |
559 | ||
560 | ssize_t /* O - Bytes read, 0 on EOF, -1 on error */ | |
561 | cupsReadResponseData( | |
562 | http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ | |
563 | char *buffer, /* I - Buffer to use */ | |
564 | size_t length) /* I - Number of bytes to read */ | |
565 | { | |
566 | /* | |
567 | * Get the default connection as needed... | |
568 | */ | |
569 | ||
570 | DEBUG_printf(("cupsReadResponseData(http=%p, buffer=%p, " | |
571 | "length=" CUPS_LLFMT ")", http, buffer, CUPS_LLCAST length)); | |
572 | ||
573 | if (!http) | |
574 | { | |
575 | _cups_globals_t *cg = _cupsGlobals(); | |
576 | /* Pointer to library globals */ | |
577 | ||
578 | if ((http = cg->http) == NULL) | |
579 | { | |
580 | _cupsSetError(IPP_INTERNAL_ERROR, _("No active connection"), 1); | |
581 | return (-1); | |
582 | } | |
583 | } | |
584 | ||
585 | /* | |
586 | * Then read from the HTTP connection... | |
587 | */ | |
588 | ||
589 | return (httpRead2(http, buffer, length)); | |
590 | } | |
591 | ||
592 | ||
593 | /* | |
594 | * 'cupsSendRequest()' - Send an IPP request. | |
595 | * | |
596 | * Use httpWrite() to write any additional data (document, PPD file, etc.) | |
597 | * for the request, cupsGetResponse() to get the IPP response, and httpRead() | |
598 | * to read any additional data following the response. Only one request can be | |
599 | * sent/queued at a time. | |
600 | * | |
601 | * Unlike cupsDoFileRequest(), cupsDoIORequest(), and cupsDoRequest(), the | |
602 | * request is not freed. | |
603 | * | |
604 | * @since CUPS 1.4/Mac OS X 10.6@ | |
605 | */ | |
606 | ||
607 | http_status_t /* O - Initial HTTP status */ | |
608 | cupsSendRequest(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ | |
609 | ipp_t *request, /* I - IPP request */ | |
610 | const char *resource, /* I - Resource path */ | |
611 | size_t length) /* I - Length of data to follow or @code CUPS_LENGTH_VARIABLE@ */ | |
612 | { | |
613 | http_status_t status; /* Status of HTTP request */ | |
614 | int got_status; /* Did we get the status? */ | |
615 | ipp_state_t state; /* State of IPP processing */ | |
616 | http_status_t expect; /* Expect: header to use */ | |
617 | ||
618 | ||
619 | DEBUG_printf(("cupsSendRequest(http=%p, request=%p(%s), resource=\"%s\", " | |
620 | "length=" CUPS_LLFMT ")", http, request, | |
621 | request ? ippOpString(request->request.op.operation_id) : "?", | |
622 | resource, CUPS_LLCAST length)); | |
623 | ||
624 | /* | |
625 | * Range check input... | |
626 | */ | |
627 | ||
628 | if (!request || !resource) | |
629 | { | |
630 | _cupsSetError(IPP_INTERNAL_ERROR, strerror(EINVAL), 0); | |
631 | ||
632 | return (HTTP_ERROR); | |
633 | } | |
634 | ||
635 | /* | |
636 | * Get the default connection as needed... | |
637 | */ | |
638 | ||
639 | if (!http) | |
640 | if ((http = _cupsConnect()) == NULL) | |
641 | return (HTTP_SERVICE_UNAVAILABLE); | |
642 | ||
643 | /* | |
644 | * If the prior request was not flushed out, do so now... | |
645 | */ | |
646 | ||
647 | if (http->state == HTTP_GET_SEND || | |
648 | http->state == HTTP_POST_SEND) | |
649 | httpFlush(http); | |
650 | else if (http->state != HTTP_WAITING) | |
651 | { | |
652 | _cupsSetError(IPP_INTERNAL_ERROR, strerror(EINVAL), 0); | |
653 | ||
654 | return (HTTP_ERROR); | |
655 | } | |
656 | ||
657 | #ifdef HAVE_SSL | |
658 | /* | |
659 | * See if we have an auth-info attribute and are communicating over | |
660 | * a non-local link. If so, encrypt the link so that we can pass | |
661 | * the authentication information securely... | |
662 | */ | |
663 | ||
664 | if (ippFindAttribute(request, "auth-info", IPP_TAG_TEXT) && | |
665 | !httpAddrLocalhost(http->hostaddr) && !http->tls && | |
666 | httpEncryption(http, HTTP_ENCRYPT_REQUIRED)) | |
667 | { | |
668 | _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0); | |
669 | return (HTTP_SERVICE_UNAVAILABLE); | |
670 | } | |
671 | #endif /* HAVE_SSL */ | |
672 | ||
673 | /* | |
674 | * Reconnect if the last response had a "Connection: close"... | |
675 | */ | |
676 | ||
677 | if (!_cups_strcasecmp(http->fields[HTTP_FIELD_CONNECTION], "close")) | |
678 | if (httpReconnect(http)) | |
679 | { | |
680 | _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0); | |
681 | return (HTTP_SERVICE_UNAVAILABLE); | |
682 | } | |
683 | ||
684 | /* | |
685 | * Loop until we can send the request without authorization problems. | |
686 | */ | |
687 | ||
688 | expect = HTTP_CONTINUE; | |
689 | ||
690 | for (;;) | |
691 | { | |
692 | DEBUG_puts("2cupsSendRequest: Setup..."); | |
693 | ||
694 | /* | |
695 | * Setup the HTTP variables needed... | |
696 | */ | |
697 | ||
698 | httpClearFields(http); | |
699 | httpSetExpect(http, expect); | |
700 | httpSetField(http, HTTP_FIELD_CONTENT_TYPE, "application/ipp"); | |
701 | httpSetLength(http, length); | |
702 | ||
703 | #ifdef HAVE_GSSAPI | |
704 | if (http->authstring && !strncmp(http->authstring, "Negotiate", 9)) | |
705 | { | |
706 | /* | |
707 | * Do not use cached Kerberos credentials since they will look like a | |
708 | * "replay" attack... | |
709 | */ | |
710 | ||
711 | _cupsSetNegotiateAuthString(http, "POST", resource); | |
712 | } | |
713 | #endif /* HAVE_GSSAPI */ | |
714 | ||
715 | httpSetField(http, HTTP_FIELD_AUTHORIZATION, http->authstring); | |
716 | ||
717 | DEBUG_printf(("2cupsSendRequest: authstring=\"%s\"", http->authstring)); | |
718 | ||
719 | /* | |
720 | * Try the request... | |
721 | */ | |
722 | ||
723 | DEBUG_puts("2cupsSendRequest: Sending HTTP POST..."); | |
724 | ||
725 | if (httpPost(http, resource)) | |
726 | { | |
727 | if (httpReconnect(http)) | |
728 | { | |
729 | _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0); | |
730 | return (HTTP_SERVICE_UNAVAILABLE); | |
731 | } | |
732 | else | |
733 | continue; | |
734 | } | |
735 | ||
736 | /* | |
737 | * Send the IPP data... | |
738 | */ | |
739 | ||
740 | DEBUG_puts("2cupsSendRequest: Writing IPP request..."); | |
741 | ||
742 | request->state = IPP_IDLE; | |
743 | status = HTTP_CONTINUE; | |
744 | got_status = 0; | |
745 | ||
746 | while ((state = ippWrite(http, request)) != IPP_DATA) | |
747 | if (state == IPP_ERROR) | |
748 | break; | |
749 | else if (httpCheck(http)) | |
750 | { | |
751 | got_status = 1; | |
752 | ||
753 | _httpUpdate(http, &status); | |
754 | if (status >= HTTP_MULTIPLE_CHOICES) | |
755 | break; | |
756 | } | |
757 | ||
758 | if (state == IPP_ERROR) | |
759 | { | |
760 | http->status = HTTP_ERROR; | |
761 | http->state = HTTP_WAITING; | |
762 | ||
763 | return (HTTP_ERROR); | |
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_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_MULTIPLE_CHOICES) | |
790 | httpFlush(http); | |
791 | ||
792 | switch (status) | |
793 | { | |
794 | case HTTP_ERROR : | |
795 | case HTTP_CONTINUE : | |
796 | case HTTP_OK : | |
797 | return (status); | |
798 | ||
799 | case HTTP_UNAUTHORIZED : | |
800 | if (cupsDoAuthentication(http, "POST", resource)) | |
801 | return (HTTP_AUTHORIZATION_CANCELED); | |
802 | ||
803 | if (httpReconnect(http)) | |
804 | { | |
805 | _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0); | |
806 | return (HTTP_SERVICE_UNAVAILABLE); | |
807 | } | |
808 | break; | |
809 | ||
810 | #ifdef HAVE_SSL | |
811 | case HTTP_UPGRADE_REQUIRED : | |
812 | /* | |
813 | * Flush any error message, reconnect, and then upgrade with | |
814 | * encryption... | |
815 | */ | |
816 | ||
817 | if (httpReconnect(http)) | |
818 | { | |
819 | _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0); | |
820 | return (HTTP_SERVICE_UNAVAILABLE); | |
821 | } | |
822 | ||
823 | if (httpEncryption(http, HTTP_ENCRYPT_REQUIRED)) | |
824 | { | |
825 | _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0); | |
826 | return (HTTP_SERVICE_UNAVAILABLE); | |
827 | } | |
828 | break; | |
829 | #endif /* HAVE_SSL */ | |
830 | ||
831 | case HTTP_EXPECTATION_FAILED : | |
832 | /* | |
833 | * Don't try using the Expect: header the next time around... | |
834 | */ | |
835 | ||
836 | expect = (http_status_t)0; | |
837 | ||
838 | if (httpReconnect(http)) | |
839 | { | |
840 | _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0); | |
841 | return (HTTP_SERVICE_UNAVAILABLE); | |
842 | } | |
843 | break; | |
844 | ||
845 | default : | |
846 | /* | |
847 | * Some other error... | |
848 | */ | |
849 | ||
850 | return (status); | |
851 | } | |
852 | } | |
853 | } | |
854 | ||
855 | ||
856 | /* | |
857 | * 'cupsWriteRequestData()' - Write additional data after an IPP request. | |
858 | * | |
859 | * This function is used after @link cupsSendRequest@ to provide a PPD and | |
860 | * after @link cupsStartDocument@ to provide a document file. | |
861 | * | |
862 | * @since CUPS 1.4/Mac OS X 10.6@ | |
863 | */ | |
864 | ||
865 | http_status_t /* O - @code HTTP_CONTINUE@ if OK or HTTP status on error */ | |
866 | cupsWriteRequestData( | |
867 | http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ | |
868 | const char *buffer, /* I - Bytes to write */ | |
869 | size_t length) /* I - Number of bytes to write */ | |
870 | { | |
871 | int wused; /* Previous bytes in buffer */ | |
872 | ||
873 | ||
874 | /* | |
875 | * Get the default connection as needed... | |
876 | */ | |
877 | ||
878 | DEBUG_printf(("cupsWriteRequestData(http=%p, buffer=%p, " | |
879 | "length=" CUPS_LLFMT ")", http, buffer, CUPS_LLCAST length)); | |
880 | ||
881 | if (!http) | |
882 | { | |
883 | _cups_globals_t *cg = _cupsGlobals(); | |
884 | /* Pointer to library globals */ | |
885 | ||
886 | if ((http = cg->http) == NULL) | |
887 | { | |
888 | _cupsSetError(IPP_INTERNAL_ERROR, _("No active connection"), 1); | |
889 | DEBUG_puts("1cupsWriteRequestData: Returning HTTP_ERROR."); | |
890 | return (HTTP_ERROR); | |
891 | } | |
892 | } | |
893 | ||
894 | /* | |
895 | * Then write to the HTTP connection... | |
896 | */ | |
897 | ||
898 | wused = http->wused; | |
899 | ||
900 | if (httpWrite2(http, buffer, length) < 0) | |
901 | { | |
902 | DEBUG_puts("1cupsWriteRequestData: Returning HTTP_ERROR."); | |
903 | _cupsSetError(IPP_INTERNAL_ERROR, strerror(http->error), 0); | |
904 | return (HTTP_ERROR); | |
905 | } | |
906 | ||
907 | /* | |
908 | * Finally, check if we have any pending data from the server... | |
909 | */ | |
910 | ||
911 | if (length >= HTTP_MAX_BUFFER || | |
912 | http->wused < wused || | |
913 | (wused > 0 && http->wused == length)) | |
914 | { | |
915 | /* | |
916 | * We've written something to the server, so check for response data... | |
917 | */ | |
918 | ||
919 | if (_httpWait(http, 0, 1)) | |
920 | { | |
921 | http_status_t status; /* Status from _httpUpdate */ | |
922 | ||
923 | _httpUpdate(http, &status); | |
924 | if (status >= HTTP_MULTIPLE_CHOICES) | |
925 | { | |
926 | _cupsSetHTTPError(status); | |
927 | httpFlush(http); | |
928 | } | |
929 | ||
930 | DEBUG_printf(("1cupsWriteRequestData: Returning %d.\n", status)); | |
931 | return (status); | |
932 | } | |
933 | } | |
934 | ||
935 | DEBUG_puts("1cupsWriteRequestData: Returning HTTP_CONTINUE."); | |
936 | return (HTTP_CONTINUE); | |
937 | } | |
938 | ||
939 | ||
940 | /* | |
941 | * '_cupsConnect()' - Get the default server connection... | |
942 | */ | |
943 | ||
944 | http_t * /* O - HTTP connection */ | |
945 | _cupsConnect(void) | |
946 | { | |
947 | _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */ | |
948 | ||
949 | ||
950 | /* | |
951 | * See if we are connected to the same server... | |
952 | */ | |
953 | ||
954 | if (cg->http) | |
955 | { | |
956 | /* | |
957 | * Compare the connection hostname, port, and encryption settings to | |
958 | * the cached defaults; these were initialized the first time we | |
959 | * connected... | |
960 | */ | |
961 | ||
962 | if (strcmp(cg->http->hostname, cg->server) || | |
963 | cg->ipp_port != _httpAddrPort(cg->http->hostaddr) || | |
964 | (cg->http->encryption != cg->encryption && | |
965 | cg->http->encryption == HTTP_ENCRYPT_NEVER)) | |
966 | { | |
967 | /* | |
968 | * Need to close the current connection because something has changed... | |
969 | */ | |
970 | ||
971 | httpClose(cg->http); | |
972 | cg->http = NULL; | |
973 | } | |
974 | } | |
975 | ||
976 | /* | |
977 | * (Re)connect as needed... | |
978 | */ | |
979 | ||
980 | if (!cg->http) | |
981 | { | |
982 | if ((cg->http = httpConnectEncrypt(cupsServer(), ippPort(), | |
983 | cupsEncryption())) == NULL) | |
984 | { | |
985 | if (errno) | |
986 | _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0); | |
987 | else | |
988 | _cupsSetError(IPP_SERVICE_UNAVAILABLE, | |
989 | _("Unable to connect to host."), 1); | |
990 | } | |
991 | } | |
992 | ||
993 | /* | |
994 | * Return the cached connection... | |
995 | */ | |
996 | ||
997 | return (cg->http); | |
998 | } | |
999 | ||
1000 | ||
1001 | /* | |
1002 | * '_cupsSetError()' - Set the last IPP status code and status-message. | |
1003 | */ | |
1004 | ||
1005 | void | |
1006 | _cupsSetError(ipp_status_t status, /* I - IPP status code */ | |
1007 | const char *message, /* I - status-message value */ | |
1008 | int localize) /* I - Localize the message? */ | |
1009 | { | |
1010 | _cups_globals_t *cg; /* Global data */ | |
1011 | ||
1012 | ||
1013 | if (!message && errno) | |
1014 | { | |
1015 | message = strerror(errno); | |
1016 | localize = 0; | |
1017 | } | |
1018 | ||
1019 | cg = _cupsGlobals(); | |
1020 | cg->last_error = status; | |
1021 | ||
1022 | if (cg->last_status_message) | |
1023 | { | |
1024 | _cupsStrFree(cg->last_status_message); | |
1025 | ||
1026 | cg->last_status_message = NULL; | |
1027 | } | |
1028 | ||
1029 | if (message) | |
1030 | { | |
1031 | if (localize) | |
1032 | { | |
1033 | /* | |
1034 | * Get the message catalog... | |
1035 | */ | |
1036 | ||
1037 | if (!cg->lang_default) | |
1038 | cg->lang_default = cupsLangDefault(); | |
1039 | ||
1040 | cg->last_status_message = _cupsStrAlloc(_cupsLangString(cg->lang_default, | |
1041 | message)); | |
1042 | } | |
1043 | else | |
1044 | cg->last_status_message = _cupsStrAlloc(message); | |
1045 | } | |
1046 | ||
1047 | DEBUG_printf(("4_cupsSetError: last_error=%s, last_status_message=\"%s\"", | |
1048 | ippErrorString(cg->last_error), cg->last_status_message)); | |
1049 | } | |
1050 | ||
1051 | ||
1052 | /* | |
1053 | * '_cupsSetHTTPError()' - Set the last error using the HTTP status. | |
1054 | */ | |
1055 | ||
1056 | void | |
1057 | _cupsSetHTTPError(http_status_t status) /* I - HTTP status code */ | |
1058 | { | |
1059 | switch (status) | |
1060 | { | |
1061 | case HTTP_NOT_FOUND : | |
1062 | _cupsSetError(IPP_NOT_FOUND, httpStatus(status), 0); | |
1063 | break; | |
1064 | ||
1065 | case HTTP_UNAUTHORIZED : | |
1066 | _cupsSetError(IPP_NOT_AUTHENTICATED, httpStatus(status), 0); | |
1067 | break; | |
1068 | ||
1069 | case HTTP_AUTHORIZATION_CANCELED : | |
1070 | _cupsSetError(IPP_AUTHENTICATION_CANCELED, httpStatus(status), 0); | |
1071 | break; | |
1072 | ||
1073 | case HTTP_FORBIDDEN : | |
1074 | _cupsSetError(IPP_FORBIDDEN, httpStatus(status), 0); | |
1075 | break; | |
1076 | ||
1077 | case HTTP_BAD_REQUEST : | |
1078 | _cupsSetError(IPP_BAD_REQUEST, httpStatus(status), 0); | |
1079 | break; | |
1080 | ||
1081 | case HTTP_REQUEST_TOO_LARGE : | |
1082 | _cupsSetError(IPP_REQUEST_VALUE, httpStatus(status), 0); | |
1083 | break; | |
1084 | ||
1085 | case HTTP_NOT_IMPLEMENTED : | |
1086 | _cupsSetError(IPP_OPERATION_NOT_SUPPORTED, httpStatus(status), 0); | |
1087 | break; | |
1088 | ||
1089 | case HTTP_NOT_SUPPORTED : | |
1090 | _cupsSetError(IPP_VERSION_NOT_SUPPORTED, httpStatus(status), 0); | |
1091 | break; | |
1092 | ||
1093 | case HTTP_UPGRADE_REQUIRED : | |
1094 | _cupsSetError(IPP_UPGRADE_REQUIRED, httpStatus(status), 0); | |
1095 | break; | |
1096 | ||
1097 | case HTTP_PKI_ERROR : | |
1098 | _cupsSetError(IPP_PKI_ERROR, httpStatus(status), 0); | |
1099 | break; | |
1100 | ||
1101 | case HTTP_ERROR : | |
1102 | _cupsSetError(IPP_INTERNAL_ERROR, httpStatus(status), 0); | |
1103 | break; | |
1104 | ||
1105 | default : | |
1106 | DEBUG_printf(("4_cupsSetHTTPError: HTTP error %d mapped to " | |
1107 | "IPP_SERVICE_UNAVAILABLE!", status)); | |
1108 | _cupsSetError(IPP_SERVICE_UNAVAILABLE, httpStatus(status), 0); | |
1109 | break; | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | ||
1114 | /* | |
1115 | * End of "$Id: request.c 7946 2008-09-16 23:27:54Z mike $". | |
1116 | */ |