]> git.ipfire.org Git - thirdparty/cups.git/blob - cups/http.c
projects / thirdparty / cups.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Load cups into easysw/current.
[thirdparty/cups.git] / cups / http.c
1 /*
2 * "$Id: http.c 5416 2006-04-17 21:24:17Z mike $"
3 *
4 * HTTP routines for the Common UNIX Printing System (CUPS).
5 *
6 * Copyright 1997-2006 by Easy Software Products, all rights reserved.
7 *
8 * These coded instructions, statements, and computer programs are the
9 * property of Easy Software Products and are protected by Federal
10 * copyright law. Distribution and use rights are outlined in the file
11 * "LICENSE.txt" which should have been included with this file. If this
12 * file is missing or damaged please contact Easy Software Products
13 * at:
14 *
15 * Attn: CUPS Licensing Information
16 * Easy Software Products
17 * 44141 Airport View Drive, Suite 204
18 * Hollywood, Maryland 20636 USA
19 *
20 * Voice: (301) 373-9600
21 * EMail: cups-info@cups.org
22 * WWW: http://www.cups.org
23 *
24 * This file is subject to the Apple OS-Developed Software exception.
25 *
26 * Contents:
27 *
28 * httpBlocking() - Set blocking/non-blocking behavior on a connection.
29 * httpCheck() - Check to see if there is a pending response from
30 * the server.
31 * httpClearCookie() - Clear the cookie value(s).
32 * httpClearFields() - Clear HTTP request fields.
33 * httpClose() - Close an HTTP connection...
34 * httpConnect() - Connect to a HTTP server.
35 * httpConnectEncrypt() - Connect to a HTTP server using encryption.
36 * httpDelete() - Send a DELETE request to the server.
37 * httpEncryption() - Set the required encryption on the link.
38 * httpError() - Get the last error on a connection.
39 * httpFlush() - Flush data from a HTTP connection.
40 * httpFlushWrite() - Flush data in write buffer.
41 * httpGet() - Send a GET request to the server.
42 * httpGetBlocking() - Get the blocking/non-block state of a connection.
43 * httpGetCookie() - Get any cookie data from the response.
44 * httpGetFd() - Get the file descriptor associated with a
45 * connection.
46 * httpGetField() - Get a field value from a request/response.
47 * httpGetLength() - Get the amount of data remaining from the
48 * content-length or transfer-encoding fields.
49 * httpGetLength2() - Get the amount of data remaining from the
50 * content-length or transfer-encoding fields.
51 * httpGetStatus() - Get the status of the last HTTP request.
52 * httpGetSubField() - Get a sub-field value.
53 * httpGets() - Get a line of text from a HTTP connection.
54 * httpHead() - Send a HEAD request to the server.
55 * httpInitialize() - Initialize the HTTP interface library and set the
56 * default HTTP proxy (if any).
57 * httpOptions() - Send an OPTIONS request to the server.
58 * httpPost() - Send a POST request to the server.
59 * httpPrintf() - Print a formatted string to a HTTP connection.
60 * httpPut() - Send a PUT request to the server.
61 * httpRead() - Read data from a HTTP connection.
62 * httpRead2() - Read data from a HTTP connection.
63 * _httpReadCDSA() - Read function for CDSA decryption code.
64 * httpReconnect() - Reconnect to a HTTP server...
65 * httpSetCookie() - Set the cookie value(s)...
66 * httpSetExpect() - Set the Expect: header in a request.
67 * httpSetField() - Set the value of an HTTP header.
68 * httpSetLength() - Set the content-length and transfer-encoding.
69 * httpTrace() - Send an TRACE request to the server.
70 * httpUpdate() - Update the current HTTP state for incoming data.
71 * httpWait() - Wait for data available on a connection.
72 * httpWrite() - Write data to a HTTP connection.
73 * httpWrite2() - Write data to a HTTP connection.
74 * _httpWriteCDSA() - Write function for CDSA encryption code.
75 * http_field() - Return the field index for a field name.
76 * http_read_ssl() - Read from a SSL/TLS connection.
77 * http_send() - Send a request with all fields and the trailing
78 * blank line.
79 * http_setup_ssl() - Set up SSL/TLS on a connection.
80 * http_shutdown_ssl() - Shut down SSL/TLS on a connection.
81 * http_upgrade() - Force upgrade to TLS encryption.
82 * http_wait() - Wait for data available on a connection.
83 * http_write() - Write data to a connection.
84 * http_write_ssl() - Write to a SSL/TLS connection.
85 */
86
87 /*
88 * Include necessary headers...
89 */
90
91 #include "http-private.h"
92 #include "globals.h"
93 #include "debug.h"
94 #include <stdlib.h>
95 #include <fcntl.h>
96 #include <errno.h>
97 #ifndef WIN32
98 # include <signal.h>
99 # include <sys/time.h>
100 # include <sys/resource.h>
101 #endif /* !WIN32 */
102
103
104 /*
105 * Some operating systems have done away with the Fxxxx constants for
106 * the fcntl() call; this works around that "feature"...
107 */
108
109 #ifndef FNONBLK
110 # define FNONBLK O_NONBLOCK
111 #endif /* !FNONBLK */
112
113
114 /*
115 * Local functions...
116 */
117
118 static http_field_t http_field(const char *name);
119 static int http_send(http_t *http, http_state_t request,
120 const char *uri);
121 static int http_wait(http_t *http, int msec);
122 static int http_write(http_t *http, const char *buffer,
123 int length);
124 static int http_write_chunk(http_t *http, const char *buffer,
125 int length);
126 #ifdef HAVE_SSL
127 static int http_read_ssl(http_t *http, char *buf, int len);
128 static int http_setup_ssl(http_t *http);
129 static void http_shutdown_ssl(http_t *http);
130 static int http_upgrade(http_t *http);
131 static int http_write_ssl(http_t *http, const char *buf, int len);
132 #endif /* HAVE_SSL */
133
134
135 /*
136 * Local globals...
137 */
138
139 static const char * const http_fields[] =
140 {
141 "Accept-Language",
142 "Accept-Ranges",
143 "Authorization",
144 "Connection",
145 "Content-Encoding",
146 "Content-Language",
147 "Content-Length",
148 "Content-Location",
149 "Content-MD5",
150 "Content-Range",
151 "Content-Type",
152 "Content-Version",
153 "Date",
154 "Host",
155 "If-Modified-Since",
156 "If-Unmodified-since",
157 "Keep-Alive",
158 "Last-Modified",
159 "Link",
160 "Location",
161 "Range",
162 "Referer",
163 "Retry-After",
164 "Transfer-Encoding",
165 "Upgrade",
166 "User-Agent",
167 "WWW-Authenticate"
168 };
169
170
171 /*
172 * 'httpBlocking()' - Set blocking/non-blocking behavior on a connection.
173 */
174
175 void
176 httpBlocking(http_t *http, /* I - HTTP connection */
177 int b) /* I - 1 = blocking, 0 = non-blocking */
178 {
179 if (http)
180 http->blocking = b;
181 }
182
183
184 /*
185 * 'httpCheck()' - Check to see if there is a pending response from the server.
186 */
187
188 int /* O - 0 = no data, 1 = data available */
189 httpCheck(http_t *http) /* I - HTTP connection */
190 {
191 return (httpWait(http, 0));
192 }
193
194
195 /*
196 * 'httpClearCookie()' - Clear the cookie value(s).
197 *
198 * @since CUPS 1.1.19@
199 */
200
201 void
202 httpClearCookie(http_t *http) /* I - HTTP connection */
203 {
204 if (!http)
205 return;
206
207 if (http->cookie)
208 {
209 free(http->cookie);
210 http->cookie = NULL;
211 }
212 }
213
214
215 /*
216 * 'httpClearFields()' - Clear HTTP request fields.
217 */
218
219 void
220 httpClearFields(http_t *http) /* I - HTTP connection */
221 {
222 if (http)
223 {
224 memset(http->fields, 0, sizeof(http->fields));
225 httpSetField(http, HTTP_FIELD_HOST, http->hostname);
226
227 http->expect = (http_status_t)0;
228 }
229 }
230
231
232 /*
233 * 'httpClose()' - Close an HTTP connection...
234 */
235
236 void
237 httpClose(http_t *http) /* I - HTTP connection */
238 {
239 DEBUG_printf(("httpClose(http=%p)\n", http));
240
241 if (!http)
242 return;
243
244 httpAddrFreeList(http->addrlist);
245
246 if (http->input_set)
247 free(http->input_set);
248
249 if (http->cookie)
250 free(http->cookie);
251
252 #ifdef HAVE_SSL
253 if (http->tls)
254 http_shutdown_ssl(http);
255 #endif /* HAVE_SSL */
256
257 #ifdef WIN32
258 closesocket(http->fd);
259 #else
260 close(http->fd);
261 #endif /* WIN32 */
262
263 free(http);
264 }
265
266
267 /*
268 * 'httpConnect()' - Connect to a HTTP server.
269 */
270
271 http_t * /* O - New HTTP connection */
272 httpConnect(const char *host, /* I - Host to connect to */
273 int port) /* I - Port number */
274 {
275 http_encryption_t encryption; /* Type of encryption to use */
276
277
278 /*
279 * Set the default encryption status...
280 */
281
282 if (port == 443)
283 encryption = HTTP_ENCRYPT_ALWAYS;
284 else
285 encryption = HTTP_ENCRYPT_IF_REQUESTED;
286
287 return (httpConnectEncrypt(host, port, encryption));
288 }
289
290
291 /*
292 * 'httpConnectEncrypt()' - Connect to a HTTP server using encryption.
293 */
294
295 http_t * /* O - New HTTP connection */
296 httpConnectEncrypt(
297 const char *host, /* I - Host to connect to */
298 int port, /* I - Port number */
299 http_encryption_t encryption) /* I - Type of encryption to use */
300 {
301 http_t *http; /* New HTTP connection */
302 http_addrlist_t *addrlist; /* Host address data */
303 char service[255]; /* Service name */
304
305
306 DEBUG_printf(("httpConnectEncrypt(host=\"%s\", port=%d, encryption=%d)\n",
307 host ? host : "(null)", port, encryption));
308
309 if (!host)
310 return (NULL);
311
312 httpInitialize();
313
314 /*
315 * Lookup the host...
316 */
317
318 sprintf(service, "%d", port);
319
320 if ((addrlist = httpAddrGetList(host, AF_UNSPEC, service)) == NULL)
321 return (NULL);
322
323 /*
324 * Allocate memory for the structure...
325 */
326
327 http = calloc(sizeof(http_t), 1);
328 if (http == NULL)
329 return (NULL);
330
331 http->version = HTTP_1_1;
332 http->blocking = 1;
333 http->activity = time(NULL);
334 http->fd = -1;
335
336 /*
337 * Set the encryption status...
338 */
339
340 if (port == 443) /* Always use encryption for https */
341 http->encryption = HTTP_ENCRYPT_ALWAYS;
342 else
343 http->encryption = encryption;
344
345 /*
346 * Loop through the addresses we have until one of them connects...
347 */
348
349 strlcpy(http->hostname, host, sizeof(http->hostname));
350
351 /*
352 * Connect to the remote system...
353 */
354
355 http->addrlist = addrlist;
356
357 if (!httpReconnect(http))
358 return (http);
359
360 /*
361 * Could not connect to any known address - bail out!
362 */
363
364 httpAddrFreeList(addrlist);
365
366 free(http);
367
368 return (NULL);
369 }
370
371
372 /*
373 * 'httpDelete()' - Send a DELETE request to the server.
374 */
375
376 int /* O - Status of call (0 = success) */
377 httpDelete(http_t *http, /* I - HTTP connection */
378 const char *uri) /* I - URI to delete */
379 {
380 return (http_send(http, HTTP_DELETE, uri));
381 }
382
383
384 /*
385 * 'httpEncryption()' - Set the required encryption on the link.
386 */
387
388 int /* O - -1 on error, 0 on success */
389 httpEncryption(http_t *http, /* I - HTTP connection */
390 http_encryption_t e) /* I - New encryption preference */
391 {
392 DEBUG_printf(("httpEncryption(http=%p, e=%d)\n", http, e));
393
394 #ifdef HAVE_SSL
395 if (!http)
396 return (0);
397
398 http->encryption = e;
399
400 if ((http->encryption == HTTP_ENCRYPT_ALWAYS && !http->tls) ||
401 (http->encryption == HTTP_ENCRYPT_NEVER && http->tls))
402 return (httpReconnect(http));
403 else if (http->encryption == HTTP_ENCRYPT_REQUIRED && !http->tls)
404 return (http_upgrade(http));
405 else
406 return (0);
407 #else
408 if (e == HTTP_ENCRYPT_ALWAYS || e == HTTP_ENCRYPT_REQUIRED)
409 return (-1);
410 else
411 return (0);
412 #endif /* HAVE_SSL */
413 }
414
415
416 /*
417 * 'httpError()' - Get the last error on a connection.
418 */
419
420 int /* O - Error code (errno) value */
421 httpError(http_t *http) /* I - HTTP connection */
422 {
423 if (http)
424 return (http->error);
425 else
426 return (EINVAL);
427 }
428
429
430 /*
431 * 'httpFlush()' - Flush data from a HTTP connection.
432 */
433
434 void
435 httpFlush(http_t *http) /* I - HTTP connection */
436 {
437 char buffer[8192]; /* Junk buffer */
438 int blocking; /* To block or not to block */
439
440
441 DEBUG_printf(("httpFlush(http=%p), state=%d\n", http, http->state));
442
443 /*
444 * Temporarily set non-blocking mode so we don't get stuck in httpRead()...
445 */
446
447 blocking = http->blocking;
448 http->blocking = 0;
449
450 /*
451 * Read any data we can...
452 */
453
454 while (httpRead2(http, buffer, sizeof(buffer)) > 0);
455
456 /*
457 * Restore blocking and reset the connection if we didn't get all of
458 * the remaining data...
459 */
460
461 http->blocking = blocking;
462
463 if (http->state != HTTP_WAITING && http->fd >= 0)
464 {
465 /*
466 * Didn't get the data back, so close the current connection.
467 */
468
469 http->state = HTTP_WAITING;
470
471 #ifdef HAVE_SSL
472 if (http->tls)
473 http_shutdown_ssl(http);
474 #endif /* HAVE_SSL */
475
476 #ifdef WIN32
477 closesocket(http->fd);
478 #else
479 close(http->fd);
480 #endif /* WIN32 */
481
482 http->fd = -1;
483 }
484 }
485
486
487 /*
488 * 'httpFlushWrite()' - Flush data in write buffer.
489 *
490 * @since CUPS 1.2@
491 */
492
493 int /* O - Bytes written or -1 on error */
494 httpFlushWrite(http_t *http) /* I - HTTP connection */
495 {
496 int bytes; /* Bytes written */
497
498
499 DEBUG_printf(("httpFlushWrite(http=%p)\n", http));
500
501 if (!http || !http->wused)
502 return (0);
503
504 if (http->data_encoding == HTTP_ENCODE_CHUNKED)
505 bytes = http_write_chunk(http, http->wbuffer, http->wused);
506 else
507 bytes = http_write(http, http->wbuffer, http->wused);
508
509 http->wused = 0;
510
511 return (bytes);
512 }
513
514
515 /*
516 * 'httpGet()' - Send a GET request to the server.
517 */
518
519 int /* O - Status of call (0 = success) */
520 httpGet(http_t *http, /* I - HTTP connection */
521 const char *uri) /* I - URI to get */
522 {
523 return (http_send(http, HTTP_GET, uri));
524 }
525
526
527 /*
528 * 'httpGetBlocking()' - Get the blocking/non-block state of a connection.
529 *
530 * @since CUPS 1.2@
531 */
532
533 int /* O - 1 if blocking, 0 if non-blocking */
534 httpGetBlocking(http_t *http) /* I - HTTP connection */
535 {
536 return (http ? http->blocking : 0);
537 }
538
539
540 /*
541 * 'httpGetCookie()' - Get any cookie data from the response.
542 *
543 * @since CUPS 1.1.19@
544 */
545
546 const char * /* O - Cookie data or NULL */
547 httpGetCookie(http_t *http) /* I - HTTP connecion */
548 {
549 return (http ? http->cookie : NULL);
550 }
551
552
553 /*
554 * 'httpGetFd()' - Get the file descriptor associated with a connection.
555 *
556 * @since CUPS 1.2@
557 */
558
559 int /* O - File descriptor or -1 if none */
560 httpGetFd(http_t *http) /* I - HTTP connection */
561 {
562 return (http ? http->fd : -1);
563 }
564
565
566 /*
567 * 'httpGetField()' - Get a field value from a request/response.
568 */
569
570 const char * /* O - Field value */
571 httpGetField(http_t *http, /* I - HTTP connection */
572 http_field_t field) /* I - Field to get */
573 {
574 if (!http || field <= HTTP_FIELD_UNKNOWN || field >= HTTP_FIELD_MAX)
575 return (NULL);
576 else
577 return (http->fields[field]);
578 }
579
580
581 /*
582 * 'httpGetLength()' - Get the amount of data remaining from the
583 * content-length or transfer-encoding fields.
584 *
585 * This function is deprecated and will not return lengths larger than
586 * 2^31 - 1; use httpGetLength2() instead.
587 *
588 * @deprecated@
589 */
590
591 int /* O - Content length */
592 httpGetLength(http_t *http) /* I - HTTP connection */
593 {
594 /*
595 * Get the read content length and return the 32-bit value.
596 */
597
598 if (http)
599 {
600 httpGetLength2(http);
601
602 return (http->_data_remaining);
603 }
604 else
605 return (-1);
606 }
607
608
609 /*
610 * 'httpGetLength2()' - Get the amount of data remaining from the
611 * content-length or transfer-encoding fields.
612 *
613 * This function returns the complete content length, even for
614 * content larger than 2^31 - 1.
615 *
616 * @since CUPS 1.2@
617 */
618
619 off_t /* O - Content length */
620 httpGetLength2(http_t *http) /* I - HTTP connection */
621 {
622 DEBUG_printf(("httpGetLength2(http=%p), state=%d\n", http, http->state));
623
624 if (!http)
625 return (-1);
626
627 if (!strcasecmp(http->fields[HTTP_FIELD_TRANSFER_ENCODING], "chunked"))
628 {
629 DEBUG_puts("httpGetLength2: chunked request!");
630
631 http->data_encoding = HTTP_ENCODE_CHUNKED;
632 http->data_remaining = 0;
633 }
634 else
635 {
636 http->data_encoding = HTTP_ENCODE_LENGTH;
637
638 /*
639 * The following is a hack for HTTP servers that don't send a
640 * content-length or transfer-encoding field...
641 *
642 * If there is no content-length then the connection must close
643 * after the transfer is complete...
644 */
645
646 if (http->fields[HTTP_FIELD_CONTENT_LENGTH][0] == '\0')
647 http->data_remaining = 2147483647;
648 else
649 http->data_remaining = strtoll(http->fields[HTTP_FIELD_CONTENT_LENGTH],
650 NULL, 10);
651
652 DEBUG_printf(("httpGetLength2: content_length=" CUPS_LLFMT "\n",
653 CUPS_LLCAST http->data_remaining));
654 }
655
656 if (http->data_remaining <= INT_MAX)
657 http->_data_remaining = (int)http->data_remaining;
658 else
659 http->_data_remaining = INT_MAX;
660
661 return (http->data_remaining);
662 }
663
664
665 /*
666 * 'httpGetStatus()' - Get the status of the last HTTP request.
667 *
668 * @since CUPS 1.2@
669 */
670
671 http_status_t /* O - HTTP status */
672 httpGetStatus(http_t *http) /* I - HTTP connection */
673 {
674 return (http ? http->status : HTTP_ERROR);
675 }
676
677
678 /*
679 * 'httpGetSubField()' - Get a sub-field value.
680 *
681 * @deprecated@
682 */
683
684 char * /* O - Value or NULL */
685 httpGetSubField(http_t *http, /* I - HTTP connection */
686 http_field_t field, /* I - Field index */
687 const char *name, /* I - Name of sub-field */
688 char *value) /* O - Value string */
689 {
690 return (httpGetSubField2(http, field, name, value, HTTP_MAX_VALUE));
691 }
692
693
694 /*
695 * 'httpGetSubField2()' - Get a sub-field value.
696 *
697 * @since CUPS 1.2@
698 */
699
700 char * /* O - Value or NULL */
701 httpGetSubField2(http_t *http, /* I - HTTP connection */
702 http_field_t field, /* I - Field index */
703 const char *name, /* I - Name of sub-field */
704 char *value, /* O - Value string */
705 int valuelen) /* I - Size of value buffer */
706 {
707 const char *fptr; /* Pointer into field */
708 char temp[HTTP_MAX_VALUE], /* Temporary buffer for name */
709 *ptr, /* Pointer into string buffer */
710 *end; /* End of value buffer */
711
712 DEBUG_printf(("httpGetSubField2(http=%p, field=%d, name=\"%s\", value=%p, valuelen=%d)\n",
713 http, field, name, value, valuelen));
714
715 if (!http || !name || !value || valuelen < 2 ||
716 field <= HTTP_FIELD_UNKNOWN || field >= HTTP_FIELD_MAX)
717 return (NULL);
718
719 end = value + valuelen - 1;
720
721 for (fptr = http->fields[field]; *fptr;)
722 {
723 /*
724 * Skip leading whitespace...
725 */
726
727 while (isspace(*fptr & 255))
728 fptr ++;
729
730 if (*fptr == ',')
731 {
732 fptr ++;
733 continue;
734 }
735
736 /*
737 * Get the sub-field name...
738 */
739
740 for (ptr = temp;
741 *fptr && *fptr != '=' && !isspace(*fptr & 255) &&
742 ptr < (temp + sizeof(temp) - 1);
743 *ptr++ = *fptr++);
744
745 *ptr = '\0';
746
747 DEBUG_printf(("httpGetSubField: name=\"%s\"\n", temp));
748
749 /*
750 * Skip trailing chars up to the '='...
751 */
752
753 while (isspace(*fptr & 255))
754 fptr ++;
755
756 if (!*fptr)
757 break;
758
759 if (*fptr != '=')
760 continue;
761
762 /*
763 * Skip = and leading whitespace...
764 */
765
766 fptr ++;
767
768 while (isspace(*fptr & 255))
769 fptr ++;
770
771 if (*fptr == '\"')
772 {
773 /*
774 * Read quoted string...
775 */
776
777 for (ptr = value, fptr ++;
778 *fptr && *fptr != '\"' && ptr < end;
779 *ptr++ = *fptr++);
780
781 *ptr = '\0';
782
783 while (*fptr && *fptr != '\"')
784 fptr ++;
785
786 if (*fptr)
787 fptr ++;
788 }
789 else
790 {
791 /*
792 * Read unquoted string...
793 */
794
795 for (ptr = value;
796 *fptr && !isspace(*fptr & 255) && *fptr != ',' && ptr < end;
797 *ptr++ = *fptr++);
798
799 *ptr = '\0';
800
801 while (*fptr && !isspace(*fptr & 255) && *fptr != ',')
802 fptr ++;
803 }
804
805 DEBUG_printf(("httpGetSubField: value=\"%s\"\n", value));
806
807 /*
808 * See if this is the one...
809 */
810
811 if (!strcmp(name, temp))
812 return (value);
813 }
814
815 value[0] = '\0';
816
817 return (NULL);
818 }
819
820
821 /*
822 * 'httpGets()' - Get a line of text from a HTTP connection.
823 */
824
825 char * /* O - Line or NULL */
826 httpGets(char *line, /* I - Line to read into */
827 int length, /* I - Max length of buffer */
828 http_t *http) /* I - HTTP connection */
829 {
830 char *lineptr, /* Pointer into line */
831 *lineend, /* End of line */
832 *bufptr, /* Pointer into input buffer */
833 *bufend; /* Pointer to end of buffer */
834 int bytes, /* Number of bytes read */
835 eol; /* End-of-line? */
836
837
838 DEBUG_printf(("httpGets(line=%p, length=%d, http=%p)\n", line, length, http));
839
840 if (http == NULL || line == NULL)
841 return (NULL);
842
843 /*
844 * Read a line from the buffer...
845 */
846
847 lineptr = line;
848 lineend = line + length - 1;
849 eol = 0;
850
851 while (lineptr < lineend)
852 {
853 /*
854 * Pre-load the buffer as needed...
855 */
856
857 #ifdef WIN32
858 WSASetLastError(0);
859 #else
860 errno = 0;
861 #endif /* WIN32 */
862
863 while (http->used == 0)
864 {
865 /*
866 * No newline; see if there is more data to be read...
867 */
868
869 if (!http->blocking && !http_wait(http, 1000))
870 {
871 DEBUG_puts("httpGets: Timed out!");
872 http->error = ETIMEDOUT;
873 return (NULL);
874 }
875
876 #ifdef HAVE_SSL
877 if (http->tls)
878 bytes = http_read_ssl(http, http->buffer + http->used,
879 HTTP_MAX_BUFFER - http->used);
880 else
881 #endif /* HAVE_SSL */
882 bytes = recv(http->fd, http->buffer + http->used,
883 HTTP_MAX_BUFFER - http->used, 0);
884
885 DEBUG_printf(("httpGets: read %d bytes...\n", bytes));
886
887 if (bytes < 0)
888 {
889 /*
890 * Nope, can't get a line this time...
891 */
892
893 #ifdef WIN32
894 if (WSAGetLastError() != http->error)
895 {
896 http->error = WSAGetLastError();
897 continue;
898 }
899
900 DEBUG_printf(("httpGets: recv() error %d!\n", WSAGetLastError()));
901 #else
902 DEBUG_printf(("httpGets: recv() error %d!\n", errno));
903
904 if (errno == EINTR)
905 continue;
906 else if (errno != http->error)
907 {
908 http->error = errno;
909 continue;
910 }
911 #endif /* WIN32 */
912
913 return (NULL);
914 }
915 else if (bytes == 0)
916 {
917 http->error = EPIPE;
918
919 return (NULL);
920 }
921
922 /*
923 * Yup, update the amount used...
924 */
925
926 http->used += bytes;
927 }
928
929 /*
930 * Now copy as much of the current line as possible...
931 */
932
933 for (bufptr = http->buffer, bufend = http->buffer + http->used;
934 lineptr < lineend && bufptr < bufend;)
935 {
936 if (*bufptr == 0x0a)
937 {
938 eol = 1;
939 bufptr ++;
940 break;
941 }
942 else if (*bufptr == 0x0d)
943 bufptr ++;
944 else
945 *lineptr++ = *bufptr++;
946 }
947
948 http->used -= bufptr - http->buffer;
949 if (http->used > 0)
950 memmove(http->buffer, bufptr, http->used);
951
952 if (eol)
953 {
954 /*
955 * End of line...
956 */
957
958 http->activity = time(NULL);
959
960 *lineptr = '\0';
961
962 DEBUG_printf(("httpGets: Returning \"%s\"\n", line));
963
964 return (line);
965 }
966 }
967
968 DEBUG_puts("httpGets: No new line available!");
969
970 return (NULL);
971 }
972
973
974 /*
975 * 'httpHead()' - Send a HEAD request to the server.
976 */
977
978 int /* O - Status of call (0 = success) */
979 httpHead(http_t *http, /* I - HTTP connection */
980 const char *uri) /* I - URI for head */
981 {
982 return (http_send(http, HTTP_HEAD, uri));
983 }
984
985
986 /*
987 * 'httpInitialize()' - Initialize the HTTP interface library and set the
988 * default HTTP proxy (if any).
989 */
990
991 void
992 httpInitialize(void)
993 {
994 #ifdef HAVE_LIBSSL
995 # ifndef WIN32
996 struct timeval curtime; /* Current time in microseconds */
997 # endif /* !WIN32 */
998 int i; /* Looping var */
999 unsigned char data[1024]; /* Seed data */
1000 #endif /* HAVE_LIBSSL */
1001
1002 #ifdef WIN32
1003 WSADATA winsockdata; /* WinSock data */
1004 static int initialized = 0; /* Has WinSock been initialized? */
1005
1006
1007 if (!initialized)
1008 WSAStartup(MAKEWORD(1,1), &winsockdata);
1009 #elif !defined(SO_NOSIGPIPE)
1010 /*
1011 * Ignore SIGPIPE signals...
1012 */
1013
1014 # ifdef HAVE_SIGSET
1015 sigset(SIGPIPE, SIG_IGN);
1016 # elif defined(HAVE_SIGACTION)
1017 struct sigaction action; /* POSIX sigaction data */
1018
1019
1020 memset(&action, 0, sizeof(action));
1021 action.sa_handler = SIG_IGN;
1022 sigaction(SIGPIPE, &action, NULL);
1023 # else
1024 signal(SIGPIPE, SIG_IGN);
1025 # endif /* !SO_NOSIGPIPE */
1026 #endif /* WIN32 */
1027
1028 #ifdef HAVE_GNUTLS
1029 gnutls_global_init();
1030 #endif /* HAVE_GNUTLS */
1031
1032 #ifdef HAVE_LIBSSL
1033 SSL_load_error_strings();
1034 SSL_library_init();
1035
1036 /*
1037 * Using the current time is a dubious random seed, but on some systems
1038 * it is the best we can do (on others, this seed isn't even used...)
1039 */
1040
1041 #ifdef WIN32
1042 #else
1043 gettimeofday(&curtime, NULL);
1044 srand(curtime.tv_sec + curtime.tv_usec);
1045 #endif /* WIN32 */
1046
1047 for (i = 0; i < sizeof(data); i ++)
1048 data[i] = rand(); /* Yes, this is a poor source of random data... */
1049
1050 RAND_seed(&data, sizeof(data));
1051 #endif /* HAVE_LIBSSL */
1052 }
1053
1054
1055 /*
1056 * 'httpOptions()' - Send an OPTIONS request to the server.
1057 */
1058
1059 int /* O - Status of call (0 = success) */
1060 httpOptions(http_t *http, /* I - HTTP connection */
1061 const char *uri) /* I - URI for options */
1062 {
1063 return (http_send(http, HTTP_OPTIONS, uri));
1064 }
1065
1066
1067 /*
1068 * 'httpPost()' - Send a POST request to the server.
1069 */
1070
1071 int /* O - Status of call (0 = success) */
1072 httpPost(http_t *http, /* I - HTTP connection */
1073 const char *uri) /* I - URI for post */
1074 {
1075 return (http_send(http, HTTP_POST, uri));
1076 }
1077
1078
1079 /*
1080 * 'httpPrintf()' - Print a formatted string to a HTTP connection.
1081 *
1082 * @private@
1083 */
1084
1085 int /* O - Number of bytes written */
1086 httpPrintf(http_t *http, /* I - HTTP connection */
1087 const char *format, /* I - printf-style format string */
1088 ...) /* I - Additional args as needed */
1089 {
1090 int bytes; /* Number of bytes to write */
1091 char buf[16384]; /* Buffer for formatted string */
1092 va_list ap; /* Variable argument pointer */
1093
1094
1095 DEBUG_printf(("httpPrintf(http=%p, format=\"%s\", ...)\n", http, format));
1096
1097 va_start(ap, format);
1098 bytes = vsnprintf(buf, sizeof(buf), format, ap);
1099 va_end(ap);
1100
1101 DEBUG_printf(("httpPrintf: %s", buf));
1102
1103 if (http->wused)
1104 {
1105 DEBUG_puts(" flushing existing data...");
1106
1107 if (httpFlushWrite(http) < 0)
1108 return (-1);
1109 }
1110
1111 return (http_write(http, buf, bytes));
1112 }
1113
1114
1115 /*
1116 * 'httpPut()' - Send a PUT request to the server.
1117 */
1118
1119 int /* O - Status of call (0 = success) */
1120 httpPut(http_t *http, /* I - HTTP connection */
1121 const char *uri) /* I - URI to put */
1122 {
1123 return (http_send(http, HTTP_PUT, uri));
1124 }
1125
1126
1127 /*
1128 * 'httpRead()' - Read data from a HTTP connection.
1129 *
1130 * This function is deprecated. Use the httpRead2() function which can
1131 * read more than 2GB of data.
1132 *
1133 * @deprecated@
1134 */
1135
1136 int /* O - Number of bytes read */
1137 httpRead(http_t *http, /* I - HTTP connection */
1138 char *buffer, /* I - Buffer for data */
1139 int length) /* I - Maximum number of bytes */
1140 {
1141 return ((int)httpRead2(http, buffer, length));
1142 }
1143
1144
1145 /*
1146 * 'httpRead2()' - Read data from a HTTP connection.
1147 *
1148 * @since CUPS 1.2@
1149 */
1150
1151 ssize_t /* O - Number of bytes read */
1152 httpRead2(http_t *http, /* I - HTTP connection */
1153 char *buffer, /* I - Buffer for data */
1154 size_t length) /* I - Maximum number of bytes */
1155 {
1156 ssize_t bytes; /* Bytes read */
1157 char len[32]; /* Length string */
1158
1159
1160 DEBUG_printf(("httpRead(http=%p, buffer=%p, length=%d)\n",
1161 http, buffer, length));
1162
1163 if (http == NULL || buffer == NULL)
1164 return (-1);
1165
1166 http->activity = time(NULL);
1167
1168 if (length <= 0)
1169 return (0);
1170
1171 if (http->data_encoding == HTTP_ENCODE_CHUNKED &&
1172 http->data_remaining <= 0)
1173 {
1174 DEBUG_puts("httpRead2: Getting chunk length...");
1175
1176 if (httpGets(len, sizeof(len), http) == NULL)
1177 {
1178 DEBUG_puts("httpRead2: Could not get length!");
1179 return (0);
1180 }
1181
1182 http->data_remaining = strtoll(len, NULL, 16);
1183 if (http->data_remaining < 0)
1184 {
1185 DEBUG_puts("httpRead2: Negative chunk length!");
1186 return (0);
1187 }
1188 }
1189
1190 DEBUG_printf(("httpRead2: data_remaining=" CUPS_LLFMT "\n",
1191 CUPS_LLCAST http->data_remaining));
1192
1193 if (http->data_remaining <= 0)
1194 {
1195 /*
1196 * A zero-length chunk ends a transfer; unless we are reading POST
1197 * data, go idle...
1198 */
1199
1200 if (http->data_encoding == HTTP_ENCODE_CHUNKED)
1201 httpGets(len, sizeof(len), http);
1202
1203 if (http->state == HTTP_POST_RECV)
1204 http->state ++;
1205 else
1206 http->state = HTTP_WAITING;
1207
1208 /*
1209 * Prevent future reads for this request...
1210 */
1211
1212 http->data_encoding = HTTP_ENCODE_LENGTH;
1213
1214 return (0);
1215 }
1216 else if (length > http->data_remaining)
1217 length = http->data_remaining;
1218
1219 if (http->used == 0 && length <= 256)
1220 {
1221 /*
1222 * Buffer small reads for better performance...
1223 */
1224
1225 if (!http->blocking && !httpWait(http, 1000))
1226 return (0);
1227
1228 if (http->data_remaining > sizeof(http->buffer))
1229 bytes = sizeof(http->buffer);
1230 else
1231 bytes = http->data_remaining;
1232
1233 #ifdef HAVE_SSL
1234 if (http->tls)
1235 bytes = http_read_ssl(http, http->buffer, bytes);
1236 else
1237 #endif /* HAVE_SSL */
1238 {
1239 DEBUG_printf(("httpRead2: reading %d bytes from socket into buffer...\n",
1240 bytes));
1241
1242 bytes = recv(http->fd, http->buffer, bytes, 0);
1243
1244 DEBUG_printf(("httpRead2: read %d bytes from socket into buffer...\n",
1245 bytes));
1246 }
1247
1248 if (bytes > 0)
1249 http->used = bytes;
1250 else if (bytes < 0)
1251 {
1252 #ifdef WIN32
1253 http->error = WSAGetLastError();
1254 return (-1);
1255 #else
1256 if (errno != EINTR)
1257 {
1258 http->error = errno;
1259 return (-1);
1260 }
1261 #endif /* WIN32 */
1262 }
1263 else
1264 {
1265 http->error = EPIPE;
1266 return (0);
1267 }
1268 }
1269
1270 if (http->used > 0)
1271 {
1272 if (length > http->used)
1273 length = http->used;
1274
1275 bytes = length;
1276
1277 DEBUG_printf(("httpRead2: grabbing %d bytes from input buffer...\n", bytes));
1278
1279 memcpy(buffer, http->buffer, length);
1280 http->used -= length;
1281
1282 if (http->used > 0)
1283 memmove(http->buffer, http->buffer + length, http->used);
1284 }
1285 #ifdef HAVE_SSL
1286 else if (http->tls)
1287 {
1288 if (!http->blocking && !httpWait(http, 1000))
1289 return (0);
1290
1291 bytes = http_read_ssl(http, buffer, length);
1292 }
1293 #endif /* HAVE_SSL */
1294 else
1295 {
1296 if (!http->blocking && !httpWait(http, 1000))
1297 return (0);
1298
1299 DEBUG_printf(("httpRead2: reading %d bytes from socket...\n", length));
1300
1301 while ((bytes = recv(http->fd, buffer, length, 0)) < 0)
1302 if (errno != EINTR)
1303 break;
1304
1305 DEBUG_printf(("httpRead2: read %d bytes from socket...\n", bytes));
1306 }
1307
1308 if (bytes > 0)
1309 {
1310 http->data_remaining -= bytes;
1311
1312 if (http->data_remaining <= INT_MAX)
1313 http->_data_remaining = (int)http->data_remaining;
1314 else
1315 http->_data_remaining = INT_MAX;
1316 }
1317 else if (bytes < 0)
1318 {
1319 #ifdef WIN32
1320 http->error = WSAGetLastError();
1321 #else
1322 if (errno == EINTR)
1323 bytes = 0;
1324 else
1325 http->error = errno;
1326 #endif /* WIN32 */
1327 }
1328 else
1329 {
1330 http->error = EPIPE;
1331 return (0);
1332 }
1333
1334 if (http->data_remaining == 0)
1335 {
1336 if (http->data_encoding == HTTP_ENCODE_CHUNKED)
1337 httpGets(len, sizeof(len), http);
1338
1339 if (http->data_encoding != HTTP_ENCODE_CHUNKED)
1340 {
1341 if (http->state == HTTP_POST_RECV)
1342 http->state ++;
1343 else
1344 http->state = HTTP_WAITING;
1345 }
1346 }
1347
1348 #ifdef DEBUG
1349 {
1350 int i, j, ch;
1351 printf("httpRead2: Read %d bytes:\n", bytes);
1352 for (i = 0; i < bytes; i += 16)
1353 {
1354 printf(" ");
1355
1356 for (j = 0; j < 16 && (i + j) < bytes; j ++)
1357 printf(" %02X", buffer[i + j] & 255);
1358
1359 while (j < 16)
1360 {
1361 printf(" ");
1362 j ++;
1363 }
1364
1365 printf(" ");
1366 for (j = 0; j < 16 && (i + j) < bytes; j ++)
1367 {
1368 ch = buffer[i + j] & 255;
1369
1370 if (ch < ' ' || ch >= 127)
1371 ch = '.';
1372
1373 putchar(ch);
1374 }
1375 putchar('\n');
1376 }
1377 }
1378 #endif /* DEBUG */
1379
1380 return (bytes);
1381 }
1382
1383
1384 #if defined(HAVE_SSL) && defined(HAVE_CDSASSL)
1385 /*
1386 * '_httpReadCDSA()' - Read function for CDSA decryption code.
1387 */
1388
1389 OSStatus /* O - -1 on error, 0 on success */
1390 _httpReadCDSA(
1391 SSLConnectionRef connection, /* I - SSL/TLS connection */
1392 void *data, /* I - Data buffer */
1393 size_t *dataLength) /* IO - Number of bytes */
1394 {
1395 OSStatus result; /* Return value */
1396 ssize_t bytes; /* Number of bytes read */
1397 cdsa_conn_ref_t u; /* Connection reference union */
1398
1399
1400 u.connection = connection;
1401
1402 do
1403 bytes = recv(u.sock, data, *dataLength, 0);
1404 while (bytes == -1 && errno == EINTR);
1405
1406 if (bytes == *dataLength)
1407 result = 0;
1408 else if (bytes > 0)
1409 {
1410 *dataLength = bytes;
1411 result = errSSLWouldBlock;
1412 }
1413 else
1414 {
1415 *dataLength = 0;
1416
1417 if (bytes == 0)
1418 result = errSSLClosedAbort;
1419 else if (errno == EAGAIN)
1420 result = errSSLWouldBlock;
1421 else if (errno == EPIPE)
1422 result = errSSLClosedAbort;
1423 else
1424 result = errSSLInternal;
1425 }
1426
1427 return result;
1428 }
1429 #endif /* HAVE_SSL && HAVE_CDSASSL */
1430
1431
1432 /*
1433 * 'httpReconnect()' - Reconnect to a HTTP server.
1434 */
1435
1436 int /* O - 0 on success, non-zero on failure */
1437 httpReconnect(http_t *http) /* I - HTTP connection */
1438 {
1439 http_addrlist_t *addr; /* Connected address */
1440
1441
1442 DEBUG_printf(("httpReconnect(http=%p)\n", http));
1443
1444 if (!http)
1445 return (-1);
1446
1447 #ifdef HAVE_SSL
1448 if (http->tls)
1449 http_shutdown_ssl(http);
1450 #endif /* HAVE_SSL */
1451
1452 /*
1453 * Close any previously open socket...
1454 */
1455
1456 if (http->fd >= 0)
1457 {
1458 #ifdef WIN32
1459 closesocket(http->fd);
1460 #else
1461 close(http->fd);
1462 #endif /* WIN32 */
1463
1464 http->fd = -1;
1465 }
1466
1467 /*
1468 * Connect to the server...
1469 */
1470
1471 if ((addr = httpAddrConnect(http->addrlist, &(http->fd))) == NULL)
1472 {
1473 /*
1474 * Unable to connect...
1475 */
1476
1477 #ifdef WIN32
1478 http->error = WSAGetLastError();
1479 #else
1480 http->error = errno;
1481 #endif /* WIN32 */
1482 http->status = HTTP_ERROR;
1483
1484 return (-1);
1485 }
1486
1487 http->hostaddr = &(addr->addr);
1488 http->error = 0;
1489 http->status = HTTP_CONTINUE;
1490
1491 #ifdef HAVE_SSL
1492 if (http->encryption == HTTP_ENCRYPT_ALWAYS)
1493 {
1494 /*
1495 * Always do encryption via SSL.
1496 */
1497
1498 if (http_setup_ssl(http) != 0)
1499 {
1500 #ifdef WIN32
1501 closesocket(http->fd);
1502 #else
1503 close(http->fd);
1504 #endif /* WIN32 */
1505
1506 return (-1);
1507 }
1508 }
1509 else if (http->encryption == HTTP_ENCRYPT_REQUIRED)
1510 return (http_upgrade(http));
1511 #endif /* HAVE_SSL */
1512
1513 return (0);
1514 }
1515
1516
1517 /*
1518 * 'httpSetCookie()' - Set the cookie value(s)...
1519 *
1520 * @since CUPS 1.1.19@
1521 */
1522
1523 void
1524 httpSetCookie(http_t *http, /* I - Connection */
1525 const char *cookie) /* I - Cookie string */
1526 {
1527 if (!http)
1528 return;
1529
1530 if (http->cookie)
1531 free(http->cookie);
1532
1533 if (cookie)
1534 http->cookie = strdup(cookie);
1535 else
1536 http->cookie = NULL;
1537 }
1538
1539
1540 /*
1541 * 'httpSetExpect()' - Set the Expect: header in a request.
1542 *
1543 * Currently only HTTP_CONTINUE is supported for the "expect" argument.
1544 *
1545 * @since CUPS 1.2@
1546 */
1547
1548 void
1549 httpSetExpect(http_t *http, /* I - HTTP connection */
1550 http_status_t expect) /* I - HTTP status to expect (HTTP_CONTINUE) */
1551 {
1552 if (http)
1553 http->expect = expect;
1554 }
1555
1556
1557 /*
1558 * 'httpSetField()' - Set the value of an HTTP header.
1559 */
1560
1561 void
1562 httpSetField(http_t *http, /* I - HTTP connection */
1563 http_field_t field, /* I - Field index */
1564 const char *value) /* I - Value */
1565 {
1566 if (http == NULL ||
1567 field < HTTP_FIELD_ACCEPT_LANGUAGE ||
1568 field > HTTP_FIELD_WWW_AUTHENTICATE ||
1569 value == NULL)
1570 return;
1571
1572 strlcpy(http->fields[field], value, HTTP_MAX_VALUE);
1573 }
1574
1575
1576 /*
1577 * 'httpSetLength()' - Set the content-length and content-encoding.
1578 *
1579 * @since CUPS 1.2@
1580 */
1581
1582 void
1583 httpSetLength(http_t *http, /* I - HTTP connection */
1584 size_t length) /* I - Length (0 for chunked) */
1585 {
1586 if (!http)
1587 return;
1588
1589 if (!length)
1590 {
1591 strcpy(http->fields[HTTP_FIELD_TRANSFER_ENCODING], "chunked");
1592 http->fields[HTTP_FIELD_CONTENT_LENGTH][0] = '\0';
1593 }
1594 else
1595 {
1596 http->fields[HTTP_FIELD_TRANSFER_ENCODING][0] = '\0';
1597 snprintf(http->fields[HTTP_FIELD_CONTENT_LENGTH], HTTP_MAX_VALUE,
1598 CUPS_LLFMT, CUPS_LLCAST length);
1599 }
1600 }
1601
1602
1603 /*
1604 * 'httpTrace()' - Send an TRACE request to the server.
1605 */
1606
1607 int /* O - Status of call (0 = success) */
1608 httpTrace(http_t *http, /* I - HTTP connection */
1609 const char *uri) /* I - URI for trace */
1610 {
1611 return (http_send(http, HTTP_TRACE, uri));
1612 }
1613
1614
1615 /*
1616 * 'httpUpdate()' - Update the current HTTP state for incoming data.
1617 */
1618
1619 http_status_t /* O - HTTP status */
1620 httpUpdate(http_t *http) /* I - HTTP connection */
1621 {
1622 char line[32768], /* Line from connection... */
1623 *value; /* Pointer to value on line */
1624 http_field_t field; /* Field index */
1625 int major, minor, /* HTTP version numbers */
1626 status; /* Request status */
1627
1628
1629 DEBUG_printf(("httpUpdate(http=%p), state=%d\n", http, http->state));
1630
1631 /*
1632 * Flush pending data, if any...
1633 */
1634
1635 if (http->wused)
1636 {
1637 DEBUG_puts(" flushing buffer...");
1638
1639 if (httpFlushWrite(http) < 0)
1640 return (HTTP_ERROR);
1641 }
1642
1643 /*
1644 * If we haven't issued any commands, then there is nothing to "update"...
1645 */
1646
1647 if (http->state == HTTP_WAITING)
1648 return (HTTP_CONTINUE);
1649
1650 /*
1651 * Grab all of the lines we can from the connection...
1652 */
1653
1654 while (httpGets(line, sizeof(line), http) != NULL)
1655 {
1656 DEBUG_printf(("httpUpdate: Got \"%s\"\n", line));
1657
1658 if (line[0] == '\0')
1659 {
1660 /*
1661 * Blank line means the start of the data section (if any). Return
1662 * the result code, too...
1663 *
1664 * If we get status 100 (HTTP_CONTINUE), then we *don't* change states.
1665 * Instead, we just return HTTP_CONTINUE to the caller and keep on
1666 * tryin'...
1667 */
1668
1669 if (http->status == HTTP_CONTINUE)
1670 return (http->status);
1671
1672 if (http->status < HTTP_BAD_REQUEST)
1673 http->digest_tries = 0;
1674
1675 #ifdef HAVE_SSL
1676 if (http->status == HTTP_SWITCHING_PROTOCOLS && !http->tls)
1677 {
1678 if (http_setup_ssl(http) != 0)
1679 {
1680 # ifdef WIN32
1681 closesocket(http->fd);
1682 # else
1683 close(http->fd);
1684 # endif /* WIN32 */
1685
1686 return (HTTP_ERROR);
1687 }
1688
1689 return (HTTP_CONTINUE);
1690 }
1691 #endif /* HAVE_SSL */
1692
1693 httpGetLength2(http);
1694
1695 switch (http->state)
1696 {
1697 case HTTP_GET :
1698 case HTTP_POST :
1699 case HTTP_POST_RECV :
1700 case HTTP_PUT :
1701 http->state ++;
1702 case HTTP_POST_SEND :
1703 case HTTP_HEAD :
1704 break;
1705
1706 default :
1707 http->state = HTTP_WAITING;
1708 break;
1709 }
1710
1711 return (http->status);
1712 }
1713 else if (strncmp(line, "HTTP/", 5) == 0)
1714 {
1715 /*
1716 * Got the beginning of a response...
1717 */
1718
1719 if (sscanf(line, "HTTP/%d.%d%d", &major, &minor, &status) != 3)
1720 return (HTTP_ERROR);
1721
1722 http->version = (http_version_t)(major * 100 + minor);
1723 http->status = (http_status_t)status;
1724 }
1725 else if ((value = strchr(line, ':')) != NULL)
1726 {
1727 /*
1728 * Got a value...
1729 */
1730
1731 *value++ = '\0';
1732 while (isspace(*value & 255))
1733 value ++;
1734
1735 /*
1736 * Be tolerants of servers that send unknown attribute fields...
1737 */
1738
1739 if (!strcasecmp(line, "expect"))
1740 {
1741 /*
1742 * "Expect: 100-continue" or similar...
1743 */
1744
1745 http->expect = (http_status_t)atoi(value);
1746 }
1747 else if (!strcasecmp(line, "cookie"))
1748 {
1749 /*
1750 * "Cookie: name=value[; name=value ...]" - replaces previous cookies...
1751 */
1752
1753 httpSetCookie(http, value);
1754 }
1755 else if ((field = http_field(line)) == HTTP_FIELD_UNKNOWN)
1756 {
1757 DEBUG_printf(("httpUpdate: unknown field %s seen!\n", line));
1758 continue;
1759 }
1760 else
1761 httpSetField(http, field, value);
1762 }
1763 else
1764 {
1765 http->status = HTTP_ERROR;
1766 return (HTTP_ERROR);
1767 }
1768 }
1769
1770 /*
1771 * See if there was an error...
1772 */
1773
1774 if (http->error == EPIPE && http->status > HTTP_CONTINUE)
1775 return (http->status);
1776
1777 if (http->error)
1778 {
1779 DEBUG_printf(("httpUpdate: socket error %d - %s\n", http->error,
1780 strerror(http->error)));
1781 http->status = HTTP_ERROR;
1782 return (HTTP_ERROR);
1783 }
1784
1785 /*
1786 * If we haven't already returned, then there is nothing new...
1787 */
1788
1789 return (HTTP_CONTINUE);
1790 }
1791
1792
1793 /*
1794 * 'httpWait()' - Wait for data available on a connection.
1795 *
1796 * @since CUPS 1.1.19@
1797 */
1798
1799 int /* O - 1 if data is available, 0 otherwise */
1800 httpWait(http_t *http, /* I - HTTP connection */
1801 int msec) /* I - Milliseconds to wait */
1802 {
1803 /*
1804 * First see if there is data in the buffer...
1805 */
1806
1807 if (http == NULL)
1808 return (0);
1809
1810 if (http->used)
1811 return (1);
1812
1813 /*
1814 * If not, check the SSL/TLS buffers and do a select() on the connection...
1815 */
1816
1817 return (http_wait(http, msec));
1818 }
1819
1820
1821 /*
1822 * 'httpWrite()' - Write data to a HTTP connection.
1823 *
1824 * This function is deprecated. Use the httpWrite2() function which can
1825 * write more than 2GB of data.
1826 *
1827 * @deprecated@
1828 */
1829
1830 int /* O - Number of bytes written */
1831 httpWrite(http_t *http, /* I - HTTP connection */
1832 const char *buffer, /* I - Buffer for data */
1833 int length) /* I - Number of bytes to write */
1834 {
1835 return ((int)httpWrite2(http, buffer, length));
1836 }
1837
1838
1839 /*
1840 * 'httpWrite2()' - Write data to a HTTP connection.
1841 *
1842 * @since CUPS 1.2@
1843 */
1844
1845 ssize_t /* O - Number of bytes written */
1846 httpWrite2(http_t *http, /* I - HTTP connection */
1847 const char *buffer, /* I - Buffer for data */
1848 size_t length) /* I - Number of bytes to write */
1849 {
1850 ssize_t bytes; /* Bytes written */
1851
1852
1853 DEBUG_printf(("httpWrite(http=%p, buffer=%p, length=%d)\n", http,
1854 buffer, length));
1855
1856 /*
1857 * Range check input...
1858 */
1859
1860 if (http == NULL || buffer == NULL)
1861 return (-1);
1862
1863 /*
1864 * Mark activity on the connection...
1865 */
1866
1867 http->activity = time(NULL);
1868
1869 /*
1870 * Buffer small writes for better performance...
1871 */
1872
1873 if (length > 0)
1874 {
1875 if (http->wused && (length + http->wused) > sizeof(http->wbuffer))
1876 {
1877 DEBUG_printf((" flushing buffer (wused=%d, length=%d)\n",
1878 http->wused, length));
1879
1880 httpFlushWrite(http);
1881 }
1882
1883 if ((length + http->wused) <= sizeof(http->wbuffer))
1884 {
1885 /*
1886 * Write to buffer...
1887 */
1888
1889 DEBUG_printf((" copying %d bytes to wbuffer...\n", length));
1890
1891 memcpy(http->wbuffer + http->wused, buffer, length);
1892 http->wused += length;
1893 bytes = length;
1894 }
1895 else
1896 {
1897 /*
1898 * Otherwise write the data directly...
1899 */
1900
1901 DEBUG_printf((" writing %d bytes to socket...\n", length));
1902
1903 if (http->data_encoding == HTTP_ENCODE_CHUNKED)
1904 bytes = http_write_chunk(http, buffer, length);
1905 else
1906 bytes = http_write(http, buffer, length);
1907
1908 DEBUG_printf((" wrote %d bytes...\n", bytes));
1909 }
1910
1911 if (http->data_encoding == HTTP_ENCODE_LENGTH)
1912 http->data_remaining -= bytes;
1913 }
1914 else
1915 bytes = 0;
1916
1917 /*
1918 * Handle end-of-request processing...
1919 */
1920
1921 if ((http->data_encoding == HTTP_ENCODE_CHUNKED && length == 0) ||
1922 (http->data_encoding == HTTP_ENCODE_LENGTH && http->data_remaining == 0))
1923 {
1924 /*
1925 * Finished with the transfer; unless we are sending POST or PUT
1926 * data, go idle...
1927 */
1928
1929 DEBUG_puts("httpWrite: changing states...");
1930
1931 if (http->wused)
1932 httpFlushWrite(http);
1933
1934 if (http->data_encoding == HTTP_ENCODE_CHUNKED)
1935 {
1936 /*
1937 * Send a 0-length chunk at the end of the request...
1938 */
1939
1940 http_write(http, "0\r\n\r\n", 5);
1941
1942 /*
1943 * Reset the data state...
1944 */
1945
1946 http->data_encoding = HTTP_ENCODE_LENGTH;
1947 http->data_remaining = 0;
1948 }
1949
1950 if (http->state == HTTP_POST_RECV)
1951 http->state ++;
1952 else if (http->state == HTTP_PUT_RECV)
1953 http->state = HTTP_STATUS;
1954 else
1955 http->state = HTTP_WAITING;
1956 }
1957
1958 return (bytes);
1959 }
1960
1961
1962 #if defined(HAVE_SSL) && defined(HAVE_CDSASSL)
1963 /*
1964 * '_httpWriteCDSA()' - Write function for CDSA encryption code.
1965 */
1966
1967 OSStatus /* O - -1 on error, 0 on success */
1968 _httpWriteCDSA(
1969 SSLConnectionRef connection, /* I - SSL/TLS connection */
1970 const void *data, /* I - Data buffer */
1971 size_t *dataLength) /* IO - Number of bytes */
1972 {
1973 OSStatus result; /* Return value */
1974 ssize_t bytes; /* Number of bytes read */
1975 cdsa_conn_ref_t u; /* Connection reference union */
1976
1977
1978 u.connection = connection;
1979
1980 do
1981 bytes = write(u.sock, data, *dataLength);
1982 while (bytes == -1 && errno == EINTR);
1983
1984 if (bytes == *dataLength)
1985 result = 0;
1986 else if (bytes >= 0)
1987 {
1988 *dataLength = bytes;
1989 result = errSSLWouldBlock;
1990 }
1991 else
1992 {
1993 *dataLength = 0;
1994
1995 if (errno == EAGAIN)
1996 result = errSSLWouldBlock;
1997 else if (errno == EPIPE)
1998 result = errSSLClosedAbort;
1999 else
2000 result = errSSLInternal;
2001 }
2002
2003 return result;
2004 }
2005 #endif /* HAVE_SSL && HAVE_CDSASSL */
2006
2007
2008 /*
2009 * 'http_field()' - Return the field index for a field name.
2010 */
2011
2012 static http_field_t /* O - Field index */
2013 http_field(const char *name) /* I - String name */
2014 {
2015 int i; /* Looping var */
2016
2017
2018 for (i = 0; i < HTTP_FIELD_MAX; i ++)
2019 if (strcasecmp(name, http_fields[i]) == 0)
2020 return ((http_field_t)i);
2021
2022 return (HTTP_FIELD_UNKNOWN);
2023 }
2024
2025
2026 #ifdef HAVE_SSL
2027 /*
2028 * 'http_read_ssl()' - Read from a SSL/TLS connection.
2029 */
2030
2031 static int /* O - Bytes read */
2032 http_read_ssl(http_t *http, /* I - HTTP connection */
2033 char *buf, /* I - Buffer to store data */
2034 int len) /* I - Length of buffer */
2035 {
2036 # if defined(HAVE_LIBSSL)
2037 return (SSL_read((SSL *)(http->tls), buf, len));
2038
2039 # elif defined(HAVE_GNUTLS)
2040 return (gnutls_record_recv(((http_tls_t *)(http->tls))->session, buf, len));
2041
2042 # elif defined(HAVE_CDSASSL)
2043 int result; /* Return value */
2044 OSStatus error; /* Error info */
2045 size_t processed; /* Number of bytes processed */
2046
2047
2048 error = SSLRead(((http_tls_t *)http->tls)->session, buf, len, &processed);
2049
2050 switch (error)
2051 {
2052 case 0 :
2053 result = (int)processed;
2054 break;
2055 case errSSLClosedGraceful :
2056 result = 0;
2057 break;
2058 case errSSLWouldBlock :
2059 if (processed)
2060 result = (int)processed;
2061 else
2062 {
2063 result = -1;
2064 errno = EINTR;
2065 }
2066 break;
2067 default :
2068 errno = EPIPE;
2069 result = -1;
2070 break;
2071 }
2072
2073 return (result);
2074 # endif /* HAVE_LIBSSL */
2075 }
2076 #endif /* HAVE_SSL */
2077
2078
2079 /*
2080 * 'http_send()' - Send a request with all fields and the trailing blank line.
2081 */
2082
2083 static int /* O - 0 on success, non-zero on error */
2084 http_send(http_t *http, /* I - HTTP connection */
2085 http_state_t request, /* I - Request code */
2086 const char *uri) /* I - URI */
2087 {
2088 int i; /* Looping var */
2089 char *ptr, /* Pointer in buffer */
2090 buf[1024]; /* Encoded URI buffer */
2091 static const char * const codes[] =
2092 { /* Request code strings */
2093 NULL,
2094 "OPTIONS",
2095 "GET",
2096 NULL,
2097 "HEAD",
2098 "POST",
2099 NULL,
2100 NULL,
2101 "PUT",
2102 NULL,
2103 "DELETE",
2104 "TRACE",
2105 "CLOSE"
2106 };
2107 static const char hex[] = "0123456789ABCDEF";
2108 /* Hex digits */
2109
2110
2111 DEBUG_printf(("http_send(http=%p, request=HTTP_%s, uri=\"%s\")\n",
2112 http, codes[request], uri));
2113
2114 if (http == NULL || uri == NULL)
2115 return (-1);
2116
2117 /*
2118 * Set the User-Agent field if it isn't already...
2119 */
2120
2121 if (!http->fields[HTTP_FIELD_USER_AGENT][0])
2122 httpSetField(http, HTTP_FIELD_USER_AGENT, CUPS_MINIMAL);
2123
2124 /*
2125 * Encode the URI as needed...
2126 */
2127
2128 for (ptr = buf; *uri != '\0' && ptr < (buf + sizeof(buf) - 1); uri ++)
2129 if (*uri <= ' ' || *uri >= 127)
2130 {
2131 if (ptr < (buf + sizeof(buf) - 1))
2132 *ptr ++ = '%';
2133 if (ptr < (buf + sizeof(buf) - 1))
2134 *ptr ++ = hex[(*uri >> 4) & 15];
2135 if (ptr < (buf + sizeof(buf) - 1))
2136 *ptr ++ = hex[*uri & 15];
2137 }
2138 else
2139 *ptr ++ = *uri;
2140
2141 *ptr = '\0';
2142
2143 /*
2144 * See if we had an error the last time around; if so, reconnect...
2145 */
2146
2147 if (http->status == HTTP_ERROR || http->status >= HTTP_BAD_REQUEST)
2148 if (httpReconnect(http))
2149 return (-1);
2150
2151 /*
2152 * Send the request header...
2153 */
2154
2155 http->state = request;
2156 if (request == HTTP_POST || request == HTTP_PUT)
2157 http->state ++;
2158
2159 http->status = HTTP_CONTINUE;
2160
2161 #ifdef HAVE_SSL
2162 if (http->encryption == HTTP_ENCRYPT_REQUIRED && !http->tls)
2163 {
2164 httpSetField(http, HTTP_FIELD_CONNECTION, "Upgrade");
2165 httpSetField(http, HTTP_FIELD_UPGRADE, "TLS/1.0,SSL/2.0,SSL/3.0");
2166 }
2167 #endif /* HAVE_SSL */
2168
2169 if (httpPrintf(http, "%s %s HTTP/1.1\r\n", codes[request], buf) < 1)
2170 {
2171 http->status = HTTP_ERROR;
2172 return (-1);
2173 }
2174
2175 for (i = 0; i < HTTP_FIELD_MAX; i ++)
2176 if (http->fields[i][0] != '\0')
2177 {
2178 DEBUG_printf(("%s: %s\n", http_fields[i], http->fields[i]));
2179
2180 if (httpPrintf(http, "%s: %s\r\n", http_fields[i], http->fields[i]) < 1)
2181 {
2182 http->status = HTTP_ERROR;
2183 return (-1);
2184 }
2185 }
2186
2187 if (http->cookie)
2188 if (httpPrintf(http, "Cookie: $Version=0; %s\r\n", http->cookie) < 1)
2189 {
2190 http->status = HTTP_ERROR;
2191 return (-1);
2192 }
2193
2194 if (http->expect == HTTP_CONTINUE &&
2195 (http->state == HTTP_POST_RECV || http->state == HTTP_PUT_RECV))
2196 if (httpPrintf(http, "Expect: 100-continue\r\n") < 1)
2197 {
2198 http->status = HTTP_ERROR;
2199 return (-1);
2200 }
2201
2202 if (httpPrintf(http, "\r\n") < 1)
2203 {
2204 http->status = HTTP_ERROR;
2205 return (-1);
2206 }
2207
2208 httpGetLength2(http);
2209 httpClearFields(http);
2210
2211 return (0);
2212 }
2213
2214
2215 #ifdef HAVE_SSL
2216 /*
2217 * 'http_setup_ssl()' - Set up SSL/TLS support on a connection.
2218 */
2219
2220 static int /* O - Status of connection */
2221 http_setup_ssl(http_t *http) /* I - HTTP connection */
2222 {
2223 # ifdef HAVE_LIBSSL
2224 SSL_CTX *context; /* Context for encryption */
2225 SSL *conn; /* Connection for encryption */
2226 # elif defined(HAVE_GNUTLS)
2227 http_tls_t *conn; /* TLS session object */
2228 gnutls_certificate_client_credentials *credentials;
2229 /* TLS credentials */
2230 # elif defined(HAVE_CDSASSL)
2231 OSStatus error; /* Error code */
2232 http_tls_t *conn; /* CDSA connection information */
2233 cdsa_conn_ref_t u; /* Connection reference union */
2234 # endif /* HAVE_LIBSSL */
2235
2236
2237 DEBUG_printf(("http_setup_ssl(http=%p)\n", http));
2238
2239 # ifdef HAVE_LIBSSL
2240 context = SSL_CTX_new(SSLv23_client_method());
2241
2242 SSL_CTX_set_options(context, SSL_OP_NO_SSLv2); /* Only use SSLv3 or TLS */
2243
2244 conn = SSL_new(context);
2245
2246 SSL_set_fd(conn, http->fd);
2247 if (SSL_connect(conn) != 1)
2248 {
2249 # ifdef DEBUG
2250 unsigned long error; /* Error code */
2251
2252 while ((error = ERR_get_error()) != 0)
2253 printf("http_setup_ssl: %s\n", ERR_error_string(error, NULL));
2254 # endif /* DEBUG */
2255
2256 SSL_CTX_free(context);
2257 SSL_free(conn);
2258
2259 # ifdef WIN32
2260 http->error = WSAGetLastError();
2261 # else
2262 http->error = errno;
2263 # endif /* WIN32 */
2264 http->status = HTTP_ERROR;
2265
2266 return (HTTP_ERROR);
2267 }
2268
2269 # elif defined(HAVE_GNUTLS)
2270 if ((conn = (http_tls_t *)malloc(sizeof(http_tls_t))) == NULL)
2271 {
2272 http->error = errno;
2273 http->status = HTTP_ERROR;
2274
2275 return (-1);
2276 }
2277
2278 credentials = (gnutls_certificate_client_credentials *)
2279 malloc(sizeof(gnutls_certificate_client_credentials));
2280 if (credentials == NULL)
2281 {
2282 free(conn);
2283
2284 http->error = errno;
2285 http->status = HTTP_ERROR;
2286
2287 return (-1);
2288 }
2289
2290 gnutls_certificate_allocate_credentials(credentials);
2291
2292 gnutls_init(&(conn->session), GNUTLS_CLIENT);
2293 gnutls_set_default_priority(conn->session);
2294 gnutls_credentials_set(conn->session, GNUTLS_CRD_CERTIFICATE, *credentials);
2295 gnutls_transport_set_ptr(conn->session,
2296 (gnutls_transport_ptr)((long)http->fd));
2297
2298 if ((gnutls_handshake(conn->session)) != GNUTLS_E_SUCCESS)
2299 {
2300 http->error = errno;
2301 http->status = HTTP_ERROR;
2302
2303 return (-1);
2304 }
2305
2306 conn->credentials = credentials;
2307
2308 # elif defined(HAVE_CDSASSL)
2309 conn = (http_tls_t *)calloc(1, sizeof(http_tls_t));
2310
2311 if (conn == NULL)
2312 return (-1);
2313
2314 if ((error = SSLNewContext(false, &conn->session)))
2315 {
2316 http->error = error;
2317 http->status = HTTP_ERROR;
2318
2319 free(conn);
2320 return (-1);
2321 }
2322
2323 /*
2324 * Use a union to resolve warnings about int/pointer size mismatches...
2325 */
2326
2327 u.connection = NULL;
2328 u.sock = http->fd;
2329 error = SSLSetConnection(conn->session, u.connection);
2330
2331 if (!error)
2332 error = SSLSetIOFuncs(conn->session, _httpReadCDSA, _httpWriteCDSA);
2333
2334 if (!error)
2335 error = SSLSetAllowsExpiredCerts(conn->session, true);
2336
2337 if (!error)
2338 error = SSLSetAllowsAnyRoot(conn->session, true);
2339
2340 if (!error)
2341 {
2342 while ((error = SSLHandshake(conn->session)) == errSSLWouldBlock)
2343 usleep(1000);
2344 }
2345
2346 if (error)
2347 {
2348 http->error = error;
2349 http->status = HTTP_ERROR;
2350
2351 SSLDisposeContext(conn->session);
2352
2353 free(conn);
2354
2355 return (-1);
2356 }
2357 # endif /* HAVE_CDSASSL */
2358
2359 http->tls = conn;
2360 return (0);
2361 }
2362 #endif /* HAVE_SSL */
2363
2364
2365 #ifdef HAVE_SSL
2366 /*
2367 * 'http_shutdown_ssl()' - Shut down SSL/TLS on a connection.
2368 */
2369
2370 static void
2371 http_shutdown_ssl(http_t *http) /* I - HTTP connection */
2372 {
2373 # ifdef HAVE_LIBSSL
2374 SSL_CTX *context; /* Context for encryption */
2375 SSL *conn; /* Connection for encryption */
2376
2377
2378 conn = (SSL *)(http->tls);
2379 context = SSL_get_SSL_CTX(conn);
2380
2381 SSL_shutdown(conn);
2382 SSL_CTX_free(context);
2383 SSL_free(conn);
2384
2385 # elif defined(HAVE_GNUTLS)
2386 http_tls_t *conn; /* Encryption session */
2387 gnutls_certificate_client_credentials *credentials;
2388 /* TLS credentials */
2389
2390
2391 conn = (http_tls_t *)(http->tls);
2392 credentials = (gnutls_certificate_client_credentials *)(conn->credentials);
2393
2394 gnutls_bye(conn->session, GNUTLS_SHUT_RDWR);
2395 gnutls_deinit(conn->session);
2396 gnutls_certificate_free_credentials(*credentials);
2397 free(credentials);
2398 free(conn);
2399
2400 # elif defined(HAVE_CDSASSL)
2401 http_tls_t *conn; /* CDSA connection information */
2402
2403
2404 conn = (http_tls_t *)(http->tls);
2405
2406 while (SSLClose(conn->session) == errSSLWouldBlock)
2407 usleep(1000);
2408
2409 SSLDisposeContext(conn->session);
2410
2411 if (conn->certsArray)
2412 CFRelease(conn->certsArray);
2413
2414 free(conn);
2415 # endif /* HAVE_LIBSSL */
2416
2417 http->tls = NULL;
2418 }
2419 #endif /* HAVE_SSL */
2420
2421
2422 #ifdef HAVE_SSL
2423 /*
2424 * 'http_upgrade()' - Force upgrade to TLS encryption.
2425 */
2426
2427 static int /* O - Status of connection */
2428 http_upgrade(http_t *http) /* I - HTTP connection */
2429 {
2430 int ret; /* Return value */
2431 http_t myhttp; /* Local copy of HTTP data */
2432
2433
2434 DEBUG_printf(("http_upgrade(%p)\n", http));
2435
2436 /*
2437 * Copy the HTTP data to a local variable so we can do the OPTIONS
2438 * request without interfering with the existing request data...
2439 */
2440
2441 memcpy(&myhttp, http, sizeof(myhttp));
2442
2443 /*
2444 * Send an OPTIONS request to the server, requiring SSL or TLS
2445 * encryption on the link...
2446 */
2447
2448 httpClearFields(&myhttp);
2449 httpSetField(&myhttp, HTTP_FIELD_CONNECTION, "upgrade");
2450 httpSetField(&myhttp, HTTP_FIELD_UPGRADE, "TLS/1.0, SSL/2.0, SSL/3.0");
2451
2452 if ((ret = httpOptions(&myhttp, "*")) == 0)
2453 {
2454 /*
2455 * Wait for the secure connection...
2456 */
2457
2458 while (httpUpdate(&myhttp) == HTTP_CONTINUE);
2459 }
2460
2461 httpFlush(&myhttp);
2462
2463 /*
2464 * Copy the HTTP data back over, if any...
2465 */
2466
2467 http->fd = myhttp.fd;
2468 http->error = myhttp.error;
2469 http->activity = myhttp.activity;
2470 http->status = myhttp.status;
2471 http->version = myhttp.version;
2472 http->keep_alive = myhttp.keep_alive;
2473 http->used = myhttp.used;
2474
2475 if (http->used)
2476 memcpy(http->buffer, myhttp.buffer, http->used);
2477
2478 http->auth_type = myhttp.auth_type;
2479 http->nonce_count = myhttp.nonce_count;
2480
2481 memcpy(http->nonce, myhttp.nonce, sizeof(http->nonce));
2482
2483 http->tls = myhttp.tls;
2484 http->encryption = myhttp.encryption;
2485
2486 /*
2487 * See if we actually went secure...
2488 */
2489
2490 if (!http->tls)
2491 {
2492 /*
2493 * Server does not support HTTP upgrade...
2494 */
2495
2496 DEBUG_puts("Server does not support HTTP upgrade!");
2497
2498 # ifdef WIN32
2499 closesocket(http->fd);
2500 # else
2501 close(http->fd);
2502 # endif
2503
2504 http->fd = -1;
2505
2506 return (-1);
2507 }
2508 else
2509 return (ret);
2510 }
2511 #endif /* HAVE_SSL */
2512
2513
2514 /*
2515 * 'http_wait()' - Wait for data available on a connection.
2516 */
2517
2518 static int /* O - 1 if data is available, 0 otherwise */
2519 http_wait(http_t *http, /* I - HTTP connection */
2520 int msec) /* I - Milliseconds to wait */
2521 {
2522 #ifndef WIN32
2523 struct rlimit limit; /* Runtime limit */
2524 int set_size; /* Size of select set */
2525 #endif /* !WIN32 */
2526 struct timeval timeout; /* Timeout */
2527 int nfds; /* Result from select() */
2528
2529
2530 DEBUG_printf(("http_wait(http=%p, msec=%d)\n", http, msec));
2531
2532 if (http->fd < 0)
2533 return (0);
2534
2535 /*
2536 * Check the SSL/TLS buffers for data first...
2537 */
2538
2539 #ifdef HAVE_SSL
2540 if (http->tls)
2541 {
2542 # ifdef HAVE_LIBSSL
2543 if (SSL_pending((SSL *)(http->tls)))
2544 return (1);
2545 # elif defined(HAVE_GNUTLS)
2546 if (gnutls_record_check_pending(((http_tls_t *)(http->tls))->session))
2547 return (1);
2548 # elif defined(HAVE_CDSASSL)
2549 size_t bytes; /* Bytes that are available */
2550
2551 if (!SSLGetBufferedReadSize(((http_tls_t *)http->tls)->session, &bytes) && bytes > 0)
2552 return (1);
2553 # endif /* HAVE_LIBSSL */
2554 }
2555 #endif /* HAVE_SSL */
2556
2557 /*
2558 * Then try doing a select() to poll the socket...
2559 */
2560
2561 if (!http->input_set)
2562 {
2563 #ifdef WIN32
2564 /*
2565 * Windows has a fixed-size select() structure, different (surprise,
2566 * surprise!) from all UNIX implementations. Just allocate this
2567 * fixed structure...
2568 */
2569
2570 http->input_set = calloc(1, sizeof(fd_set));
2571 #else
2572 /*
2573 * Allocate the select() input set based upon the max number of file
2574 * descriptors available for this process...
2575 */
2576
2577 getrlimit(RLIMIT_NOFILE, &limit);
2578
2579 set_size = (limit.rlim_cur + 31) / 8 + 4;
2580 if (set_size < sizeof(fd_set))
2581 set_size = sizeof(fd_set);
2582
2583 http->input_set = calloc(1, set_size);
2584 #endif /* WIN32 */
2585
2586 if (!http->input_set)
2587 return (0);
2588 }
2589
2590 do
2591 {
2592 FD_SET(http->fd, http->input_set);
2593
2594 DEBUG_printf(("http_wait: msec=%d, http->fd=%d\n", msec, http->fd));
2595
2596 if (msec >= 0)
2597 {
2598 timeout.tv_sec = msec / 1000;
2599 timeout.tv_usec = (msec % 1000) * 1000;
2600
2601 nfds = select(http->fd + 1, http->input_set, NULL, NULL, &timeout);
2602 }
2603 else
2604 nfds = select(http->fd + 1, http->input_set, NULL, NULL, NULL);
2605
2606 DEBUG_printf(("http_wait: select() returned %d...\n", nfds));
2607 }
2608 #ifdef WIN32
2609 while (nfds < 0 && WSAGetLastError() == WSAEINTR);
2610 #else
2611 while (nfds < 0 && errno == EINTR);
2612 #endif /* WIN32 */
2613
2614 FD_CLR(http->fd, http->input_set);
2615
2616 DEBUG_printf(("http_wait: returning with nfds=%d...\n", nfds));
2617
2618 return (nfds > 0);
2619 }
2620
2621
2622 /*
2623 * 'http_write()' - Write a buffer to a HTTP connection.
2624 */
2625
2626 static int /* O - Number of bytes written */
2627 http_write(http_t *http, /* I - HTTP connection */
2628 const char *buffer, /* I - Buffer for data */
2629 int length) /* I - Number of bytes to write */
2630 {
2631 int tbytes, /* Total bytes sent */
2632 bytes; /* Bytes sent */
2633
2634
2635 tbytes = 0;
2636
2637 while (length > 0)
2638 {
2639 #ifdef HAVE_SSL
2640 if (http->tls)
2641 bytes = http_write_ssl(http, buffer, length);
2642 else
2643 #endif /* HAVE_SSL */
2644 bytes = send(http->fd, buffer, length, 0);
2645
2646 if (bytes < 0)
2647 {
2648 #ifdef WIN32
2649 if (WSAGetLastError() != http->error)
2650 {
2651 http->error = WSAGetLastError();
2652 continue;
2653 }
2654 #else
2655 if (errno == EINTR)
2656 continue;
2657 else if (errno != http->error && errno != ECONNRESET)
2658 {
2659 http->error = errno;
2660 continue;
2661 }
2662 #endif /* WIN32 */
2663
2664 DEBUG_puts("http_write: error writing data...\n");
2665
2666 return (-1);
2667 }
2668
2669 buffer += bytes;
2670 tbytes += bytes;
2671 length -= bytes;
2672 }
2673
2674 #ifdef DEBUG
2675 {
2676 int i, j, ch;
2677 printf("http_write: wrote %d bytes: \n", tbytes);
2678 for (i = 0, buffer -= tbytes; i < tbytes; i += 16)
2679 {
2680 printf(" ");
2681
2682 for (j = 0; j < 16 && (i + j) < tbytes; j ++)
2683 printf(" %02X", buffer[i + j] & 255);
2684
2685 while (j < 16)
2686 {
2687 printf(" ");
2688 j ++;
2689 }
2690
2691 printf(" ");
2692 for (j = 0; j < 16 && (i + j) < tbytes; j ++)
2693 {
2694 ch = buffer[i + j] & 255;
2695
2696 if (ch < ' ' || ch == 127)
2697 ch = '.';
2698
2699 putchar(ch);
2700 }
2701 putchar('\n');
2702 }
2703 }
2704 #endif /* DEBUG */
2705
2706 return (tbytes);
2707 }
2708
2709
2710 /*
2711 * 'http_write_chunk()' - Write a chunked buffer.
2712 */
2713
2714 static int /* O - Number bytes written */
2715 http_write_chunk(http_t *http, /* I - HTTP connection */
2716 const char *buffer, /* I - Buffer to write */
2717 int length) /* I - Length of buffer */
2718 {
2719 char header[255]; /* Chunk header */
2720 int bytes; /* Bytes written */
2721
2722 DEBUG_printf(("http_write_chunk(http=%p, buffer=%p, length=%d)\n",
2723 http, buffer, length));
2724
2725 /*
2726 * Write the chunk header, data, and trailer.
2727 */
2728
2729 sprintf(header, "%x\r\n", length);
2730 if (http_write(http, header, strlen(header)) < 0)
2731 {
2732 DEBUG_puts(" http_write of length failed!");
2733 return (-1);
2734 }
2735
2736 if ((bytes = http_write(http, buffer, length)) < 0)
2737 {
2738 DEBUG_puts(" http_write of buffer failed!");
2739 return (-1);
2740 }
2741
2742 if (http_write(http, "\r\n", 2) < 0)
2743 {
2744 DEBUG_puts(" http_write of CR LF failed!");
2745 return (-1);
2746 }
2747
2748 return (bytes);
2749 }
2750
2751
2752 #ifdef HAVE_SSL
2753 /*
2754 * 'http_write_ssl()' - Write to a SSL/TLS connection.
2755 */
2756
2757 static int /* O - Bytes written */
2758 http_write_ssl(http_t *http, /* I - HTTP connection */
2759 const char *buf, /* I - Buffer holding data */
2760 int len) /* I - Length of buffer */
2761 {
2762 # if defined(HAVE_LIBSSL)
2763 return (SSL_write((SSL *)(http->tls), buf, len));
2764
2765 # elif defined(HAVE_GNUTLS)
2766 return (gnutls_record_send(((http_tls_t *)(http->tls))->session, buf, len));
2767 # elif defined(HAVE_CDSASSL)
2768 int result; /* Return value */
2769 OSStatus error; /* Error info */
2770 size_t processed; /* Number of bytes processed */
2771
2772
2773 error = SSLWrite(((http_tls_t *)http->tls)->session, buf, len, &processed);
2774
2775 switch (error)
2776 {
2777 case 0 :
2778 result = (int)processed;
2779 break;
2780 case errSSLClosedGraceful :
2781 result = 0;
2782 break;
2783 case errSSLWouldBlock :
2784 if (processed)
2785 result = (int)processed;
2786 else
2787 {
2788 result = -1;
2789 errno = EINTR;
2790 }
2791 break;
2792 default :
2793 errno = EPIPE;
2794 result = -1;
2795 break;
2796 }
2797
2798 return (result);
2799 # endif /* HAVE_LIBSSL */
2800 }
2801 #endif /* HAVE_SSL */
2802
2803
2804 /*
2805 * End of "$Id: http.c 5416 2006-04-17 21:24:17Z mike $".
2806 */
Unnamed repository; edit this file 'description' to name the repository.