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[thirdparty/cups.git] / cups / http.c
1 /*
2 * "$Id$"
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, 10000))
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, 10000))
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, 10000))
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, 10000))
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 = errSSLClosedGraceful;
1419 else if (errno == EAGAIN)
1420 result = errSSLWouldBlock;
1421 else
1422 result = errSSLClosedAbort;
1423 }
1424
1425 return result;
1426 }
1427 #endif /* HAVE_SSL && HAVE_CDSASSL */
1428
1429
1430 /*
1431 * 'httpReconnect()' - Reconnect to a HTTP server.
1432 */
1433
1434 int /* O - 0 on success, non-zero on failure */
1435 httpReconnect(http_t *http) /* I - HTTP connection */
1436 {
1437 http_addrlist_t *addr; /* Connected address */
1438
1439
1440 DEBUG_printf(("httpReconnect(http=%p)\n", http));
1441
1442 if (!http)
1443 return (-1);
1444
1445 #ifdef HAVE_SSL
1446 if (http->tls)
1447 http_shutdown_ssl(http);
1448 #endif /* HAVE_SSL */
1449
1450 /*
1451 * Close any previously open socket...
1452 */
1453
1454 if (http->fd >= 0)
1455 {
1456 #ifdef WIN32
1457 closesocket(http->fd);
1458 #else
1459 close(http->fd);
1460 #endif /* WIN32 */
1461
1462 http->fd = -1;
1463 }
1464
1465 /*
1466 * Connect to the server...
1467 */
1468
1469 if ((addr = httpAddrConnect(http->addrlist, &(http->fd))) == NULL)
1470 {
1471 /*
1472 * Unable to connect...
1473 */
1474
1475 #ifdef WIN32
1476 http->error = WSAGetLastError();
1477 #else
1478 http->error = errno;
1479 #endif /* WIN32 */
1480 http->status = HTTP_ERROR;
1481
1482 return (-1);
1483 }
1484
1485 http->hostaddr = &(addr->addr);
1486 http->error = 0;
1487 http->status = HTTP_CONTINUE;
1488
1489 #ifdef HAVE_SSL
1490 if (http->encryption == HTTP_ENCRYPT_ALWAYS)
1491 {
1492 /*
1493 * Always do encryption via SSL.
1494 */
1495
1496 if (http_setup_ssl(http) != 0)
1497 {
1498 #ifdef WIN32
1499 closesocket(http->fd);
1500 #else
1501 close(http->fd);
1502 #endif /* WIN32 */
1503
1504 return (-1);
1505 }
1506 }
1507 else if (http->encryption == HTTP_ENCRYPT_REQUIRED)
1508 return (http_upgrade(http));
1509 #endif /* HAVE_SSL */
1510
1511 return (0);
1512 }
1513
1514
1515 /*
1516 * 'httpSetCookie()' - Set the cookie value(s)...
1517 *
1518 * @since CUPS 1.1.19@
1519 */
1520
1521 void
1522 httpSetCookie(http_t *http, /* I - Connection */
1523 const char *cookie) /* I - Cookie string */
1524 {
1525 if (!http)
1526 return;
1527
1528 if (http->cookie)
1529 free(http->cookie);
1530
1531 if (cookie)
1532 http->cookie = strdup(cookie);
1533 else
1534 http->cookie = NULL;
1535 }
1536
1537
1538 /*
1539 * 'httpSetExpect()' - Set the Expect: header in a request.
1540 *
1541 * Currently only HTTP_CONTINUE is supported for the "expect" argument.
1542 *
1543 * @since CUPS 1.2@
1544 */
1545
1546 void
1547 httpSetExpect(http_t *http, /* I - HTTP connection */
1548 http_status_t expect) /* I - HTTP status to expect (HTTP_CONTINUE) */
1549 {
1550 if (http)
1551 http->expect = expect;
1552 }
1553
1554
1555 /*
1556 * 'httpSetField()' - Set the value of an HTTP header.
1557 */
1558
1559 void
1560 httpSetField(http_t *http, /* I - HTTP connection */
1561 http_field_t field, /* I - Field index */
1562 const char *value) /* I - Value */
1563 {
1564 if (http == NULL ||
1565 field < HTTP_FIELD_ACCEPT_LANGUAGE ||
1566 field > HTTP_FIELD_WWW_AUTHENTICATE ||
1567 value == NULL)
1568 return;
1569
1570 strlcpy(http->fields[field], value, HTTP_MAX_VALUE);
1571 }
1572
1573
1574 /*
1575 * 'httpSetLength()' - Set the content-length and content-encoding.
1576 *
1577 * @since CUPS 1.2@
1578 */
1579
1580 void
1581 httpSetLength(http_t *http, /* I - HTTP connection */
1582 size_t length) /* I - Length (0 for chunked) */
1583 {
1584 if (!http)
1585 return;
1586
1587 if (!length)
1588 {
1589 strcpy(http->fields[HTTP_FIELD_TRANSFER_ENCODING], "chunked");
1590 http->fields[HTTP_FIELD_CONTENT_LENGTH][0] = '\0';
1591 }
1592 else
1593 {
1594 http->fields[HTTP_FIELD_TRANSFER_ENCODING][0] = '\0';
1595 snprintf(http->fields[HTTP_FIELD_CONTENT_LENGTH], HTTP_MAX_VALUE,
1596 CUPS_LLFMT, CUPS_LLCAST length);
1597 }
1598 }
1599
1600
1601 /*
1602 * 'httpTrace()' - Send an TRACE request to the server.
1603 */
1604
1605 int /* O - Status of call (0 = success) */
1606 httpTrace(http_t *http, /* I - HTTP connection */
1607 const char *uri) /* I - URI for trace */
1608 {
1609 return (http_send(http, HTTP_TRACE, uri));
1610 }
1611
1612
1613 /*
1614 * 'httpUpdate()' - Update the current HTTP state for incoming data.
1615 */
1616
1617 http_status_t /* O - HTTP status */
1618 httpUpdate(http_t *http) /* I - HTTP connection */
1619 {
1620 char line[32768], /* Line from connection... */
1621 *value; /* Pointer to value on line */
1622 http_field_t field; /* Field index */
1623 int major, minor, /* HTTP version numbers */
1624 status; /* Request status */
1625
1626
1627 DEBUG_printf(("httpUpdate(http=%p), state=%d\n", http, http->state));
1628
1629 /*
1630 * Flush pending data, if any...
1631 */
1632
1633 if (http->wused)
1634 {
1635 DEBUG_puts(" flushing buffer...");
1636
1637 if (httpFlushWrite(http) < 0)
1638 return (HTTP_ERROR);
1639 }
1640
1641 /*
1642 * If we haven't issued any commands, then there is nothing to "update"...
1643 */
1644
1645 if (http->state == HTTP_WAITING)
1646 return (HTTP_CONTINUE);
1647
1648 /*
1649 * Grab all of the lines we can from the connection...
1650 */
1651
1652 while (httpGets(line, sizeof(line), http) != NULL)
1653 {
1654 DEBUG_printf(("httpUpdate: Got \"%s\"\n", line));
1655
1656 if (line[0] == '\0')
1657 {
1658 /*
1659 * Blank line means the start of the data section (if any). Return
1660 * the result code, too...
1661 *
1662 * If we get status 100 (HTTP_CONTINUE), then we *don't* change states.
1663 * Instead, we just return HTTP_CONTINUE to the caller and keep on
1664 * tryin'...
1665 */
1666
1667 if (http->status == HTTP_CONTINUE)
1668 return (http->status);
1669
1670 if (http->status < HTTP_BAD_REQUEST)
1671 http->digest_tries = 0;
1672
1673 #ifdef HAVE_SSL
1674 if (http->status == HTTP_SWITCHING_PROTOCOLS && !http->tls)
1675 {
1676 if (http_setup_ssl(http) != 0)
1677 {
1678 # ifdef WIN32
1679 closesocket(http->fd);
1680 # else
1681 close(http->fd);
1682 # endif /* WIN32 */
1683
1684 return (HTTP_ERROR);
1685 }
1686
1687 return (HTTP_CONTINUE);
1688 }
1689 #endif /* HAVE_SSL */
1690
1691 httpGetLength2(http);
1692
1693 switch (http->state)
1694 {
1695 case HTTP_GET :
1696 case HTTP_POST :
1697 case HTTP_POST_RECV :
1698 case HTTP_PUT :
1699 http->state ++;
1700 case HTTP_POST_SEND :
1701 case HTTP_HEAD :
1702 break;
1703
1704 default :
1705 http->state = HTTP_WAITING;
1706 break;
1707 }
1708
1709 return (http->status);
1710 }
1711 else if (strncmp(line, "HTTP/", 5) == 0)
1712 {
1713 /*
1714 * Got the beginning of a response...
1715 */
1716
1717 if (sscanf(line, "HTTP/%d.%d%d", &major, &minor, &status) != 3)
1718 return (HTTP_ERROR);
1719
1720 http->version = (http_version_t)(major * 100 + minor);
1721 http->status = (http_status_t)status;
1722 }
1723 else if ((value = strchr(line, ':')) != NULL)
1724 {
1725 /*
1726 * Got a value...
1727 */
1728
1729 *value++ = '\0';
1730 while (isspace(*value & 255))
1731 value ++;
1732
1733 /*
1734 * Be tolerants of servers that send unknown attribute fields...
1735 */
1736
1737 if (!strcasecmp(line, "expect"))
1738 {
1739 /*
1740 * "Expect: 100-continue" or similar...
1741 */
1742
1743 http->expect = (http_status_t)atoi(value);
1744 }
1745 else if (!strcasecmp(line, "cookie"))
1746 {
1747 /*
1748 * "Cookie: name=value[; name=value ...]" - replaces previous cookies...
1749 */
1750
1751 httpSetCookie(http, value);
1752 }
1753 else if ((field = http_field(line)) == HTTP_FIELD_UNKNOWN)
1754 {
1755 DEBUG_printf(("httpUpdate: unknown field %s seen!\n", line));
1756 continue;
1757 }
1758 else
1759 httpSetField(http, field, value);
1760 }
1761 else
1762 {
1763 http->status = HTTP_ERROR;
1764 return (HTTP_ERROR);
1765 }
1766 }
1767
1768 /*
1769 * See if there was an error...
1770 */
1771
1772 if (http->error == EPIPE && http->status > HTTP_CONTINUE)
1773 return (http->status);
1774
1775 if (http->error)
1776 {
1777 DEBUG_printf(("httpUpdate: socket error %d - %s\n", http->error,
1778 strerror(http->error)));
1779 http->status = HTTP_ERROR;
1780 return (HTTP_ERROR);
1781 }
1782
1783 /*
1784 * If we haven't already returned, then there is nothing new...
1785 */
1786
1787 return (HTTP_CONTINUE);
1788 }
1789
1790
1791 /*
1792 * 'httpWait()' - Wait for data available on a connection.
1793 *
1794 * @since CUPS 1.1.19@
1795 */
1796
1797 int /* O - 1 if data is available, 0 otherwise */
1798 httpWait(http_t *http, /* I - HTTP connection */
1799 int msec) /* I - Milliseconds to wait */
1800 {
1801 /*
1802 * First see if there is data in the buffer...
1803 */
1804
1805 if (http == NULL)
1806 return (0);
1807
1808 if (http->used)
1809 return (1);
1810
1811 /*
1812 * If not, check the SSL/TLS buffers and do a select() on the connection...
1813 */
1814
1815 return (http_wait(http, msec));
1816 }
1817
1818
1819 /*
1820 * 'httpWrite()' - Write data to a HTTP connection.
1821 *
1822 * This function is deprecated. Use the httpWrite2() function which can
1823 * write more than 2GB of data.
1824 *
1825 * @deprecated@
1826 */
1827
1828 int /* O - Number of bytes written */
1829 httpWrite(http_t *http, /* I - HTTP connection */
1830 const char *buffer, /* I - Buffer for data */
1831 int length) /* I - Number of bytes to write */
1832 {
1833 return ((int)httpWrite2(http, buffer, length));
1834 }
1835
1836
1837 /*
1838 * 'httpWrite2()' - Write data to a HTTP connection.
1839 *
1840 * @since CUPS 1.2@
1841 */
1842
1843 ssize_t /* O - Number of bytes written */
1844 httpWrite2(http_t *http, /* I - HTTP connection */
1845 const char *buffer, /* I - Buffer for data */
1846 size_t length) /* I - Number of bytes to write */
1847 {
1848 ssize_t bytes; /* Bytes written */
1849
1850
1851 DEBUG_printf(("httpWrite(http=%p, buffer=%p, length=%d)\n", http,
1852 buffer, length));
1853
1854 /*
1855 * Range check input...
1856 */
1857
1858 if (http == NULL || buffer == NULL)
1859 return (-1);
1860
1861 /*
1862 * Mark activity on the connection...
1863 */
1864
1865 http->activity = time(NULL);
1866
1867 /*
1868 * Buffer small writes for better performance...
1869 */
1870
1871 if (length > 0)
1872 {
1873 if (http->wused && (length + http->wused) > sizeof(http->wbuffer))
1874 {
1875 DEBUG_printf((" flushing buffer (wused=%d, length=%d)\n",
1876 http->wused, length));
1877
1878 httpFlushWrite(http);
1879 }
1880
1881 if ((length + http->wused) <= sizeof(http->wbuffer))
1882 {
1883 /*
1884 * Write to buffer...
1885 */
1886
1887 DEBUG_printf((" copying %d bytes to wbuffer...\n", length));
1888
1889 memcpy(http->wbuffer + http->wused, buffer, length);
1890 http->wused += length;
1891 bytes = length;
1892 }
1893 else
1894 {
1895 /*
1896 * Otherwise write the data directly...
1897 */
1898
1899 DEBUG_printf((" writing %d bytes to socket...\n", length));
1900
1901 if (http->data_encoding == HTTP_ENCODE_CHUNKED)
1902 bytes = http_write_chunk(http, buffer, length);
1903 else
1904 bytes = http_write(http, buffer, length);
1905
1906 DEBUG_printf((" wrote %d bytes...\n", bytes));
1907 }
1908
1909 if (http->data_encoding == HTTP_ENCODE_LENGTH)
1910 http->data_remaining -= bytes;
1911 }
1912 else
1913 bytes = 0;
1914
1915 /*
1916 * Handle end-of-request processing...
1917 */
1918
1919 if ((http->data_encoding == HTTP_ENCODE_CHUNKED && length == 0) ||
1920 (http->data_encoding == HTTP_ENCODE_LENGTH && http->data_remaining == 0))
1921 {
1922 /*
1923 * Finished with the transfer; unless we are sending POST or PUT
1924 * data, go idle...
1925 */
1926
1927 DEBUG_puts("httpWrite: changing states...");
1928
1929 if (http->wused)
1930 httpFlushWrite(http);
1931
1932 if (http->data_encoding == HTTP_ENCODE_CHUNKED)
1933 {
1934 /*
1935 * Send a 0-length chunk at the end of the request...
1936 */
1937
1938 http_write(http, "0\r\n\r\n", 5);
1939
1940 /*
1941 * Reset the data state...
1942 */
1943
1944 http->data_encoding = HTTP_ENCODE_LENGTH;
1945 http->data_remaining = 0;
1946 }
1947
1948 if (http->state == HTTP_POST_RECV)
1949 http->state ++;
1950 else if (http->state == HTTP_PUT_RECV)
1951 http->state = HTTP_STATUS;
1952 else
1953 http->state = HTTP_WAITING;
1954 }
1955
1956 return (bytes);
1957 }
1958
1959
1960 #if defined(HAVE_SSL) && defined(HAVE_CDSASSL)
1961 /*
1962 * '_httpWriteCDSA()' - Write function for CDSA encryption code.
1963 */
1964
1965 OSStatus /* O - -1 on error, 0 on success */
1966 _httpWriteCDSA(
1967 SSLConnectionRef connection, /* I - SSL/TLS connection */
1968 const void *data, /* I - Data buffer */
1969 size_t *dataLength) /* IO - Number of bytes */
1970 {
1971 OSStatus result; /* Return value */
1972 ssize_t bytes; /* Number of bytes read */
1973 cdsa_conn_ref_t u; /* Connection reference union */
1974
1975
1976 u.connection = connection;
1977
1978 do
1979 bytes = write(u.sock, data, *dataLength);
1980 while (bytes == -1 && errno == EINTR);
1981
1982 if (bytes == *dataLength)
1983 result = 0;
1984 else if (bytes >= 0)
1985 {
1986 *dataLength = bytes;
1987 result = errSSLWouldBlock;
1988 }
1989 else
1990 {
1991 *dataLength = 0;
1992
1993 if (errno == EAGAIN)
1994 result = errSSLWouldBlock;
1995 else
1996 result = errSSLClosedAbort;
1997 }
1998
1999 return result;
2000 }
2001 #endif /* HAVE_SSL && HAVE_CDSASSL */
2002
2003
2004 /*
2005 * 'http_field()' - Return the field index for a field name.
2006 */
2007
2008 static http_field_t /* O - Field index */
2009 http_field(const char *name) /* I - String name */
2010 {
2011 int i; /* Looping var */
2012
2013
2014 for (i = 0; i < HTTP_FIELD_MAX; i ++)
2015 if (strcasecmp(name, http_fields[i]) == 0)
2016 return ((http_field_t)i);
2017
2018 return (HTTP_FIELD_UNKNOWN);
2019 }
2020
2021
2022 #ifdef HAVE_SSL
2023 /*
2024 * 'http_read_ssl()' - Read from a SSL/TLS connection.
2025 */
2026
2027 static int /* O - Bytes read */
2028 http_read_ssl(http_t *http, /* I - HTTP connection */
2029 char *buf, /* I - Buffer to store data */
2030 int len) /* I - Length of buffer */
2031 {
2032 # if defined(HAVE_LIBSSL)
2033 return (SSL_read((SSL *)(http->tls), buf, len));
2034
2035 # elif defined(HAVE_GNUTLS)
2036 return (gnutls_record_recv(((http_tls_t *)(http->tls))->session, buf, len));
2037
2038 # elif defined(HAVE_CDSASSL)
2039 int result; /* Return value */
2040 OSStatus error; /* Error info */
2041 size_t processed; /* Number of bytes processed */
2042
2043
2044 error = SSLRead(((http_tls_t *)http->tls)->session, buf, len, &processed);
2045
2046 switch (error)
2047 {
2048 case 0 :
2049 result = (int)processed;
2050 break;
2051 case errSSLClosedGraceful :
2052 result = 0;
2053 break;
2054 case errSSLWouldBlock :
2055 if (processed)
2056 result = (int)processed;
2057 else
2058 {
2059 result = -1;
2060 errno = EINTR;
2061 }
2062 break;
2063 default :
2064 errno = EPIPE;
2065 result = -1;
2066 break;
2067 }
2068
2069 return (result);
2070 # endif /* HAVE_LIBSSL */
2071 }
2072 #endif /* HAVE_SSL */
2073
2074
2075 /*
2076 * 'http_send()' - Send a request with all fields and the trailing blank line.
2077 */
2078
2079 static int /* O - 0 on success, non-zero on error */
2080 http_send(http_t *http, /* I - HTTP connection */
2081 http_state_t request, /* I - Request code */
2082 const char *uri) /* I - URI */
2083 {
2084 int i; /* Looping var */
2085 char *ptr, /* Pointer in buffer */
2086 buf[1024]; /* Encoded URI buffer */
2087 static const char * const codes[] =
2088 { /* Request code strings */
2089 NULL,
2090 "OPTIONS",
2091 "GET",
2092 NULL,
2093 "HEAD",
2094 "POST",
2095 NULL,
2096 NULL,
2097 "PUT",
2098 NULL,
2099 "DELETE",
2100 "TRACE",
2101 "CLOSE"
2102 };
2103 static const char hex[] = "0123456789ABCDEF";
2104 /* Hex digits */
2105
2106
2107 DEBUG_printf(("http_send(http=%p, request=HTTP_%s, uri=\"%s\")\n",
2108 http, codes[request], uri));
2109
2110 if (http == NULL || uri == NULL)
2111 return (-1);
2112
2113 /*
2114 * Set the User-Agent field if it isn't already...
2115 */
2116
2117 if (!http->fields[HTTP_FIELD_USER_AGENT][0])
2118 httpSetField(http, HTTP_FIELD_USER_AGENT, CUPS_MINIMAL);
2119
2120 /*
2121 * Encode the URI as needed...
2122 */
2123
2124 for (ptr = buf; *uri != '\0' && ptr < (buf + sizeof(buf) - 1); uri ++)
2125 if (*uri <= ' ' || *uri >= 127)
2126 {
2127 if (ptr < (buf + sizeof(buf) - 1))
2128 *ptr ++ = '%';
2129 if (ptr < (buf + sizeof(buf) - 1))
2130 *ptr ++ = hex[(*uri >> 4) & 15];
2131 if (ptr < (buf + sizeof(buf) - 1))
2132 *ptr ++ = hex[*uri & 15];
2133 }
2134 else
2135 *ptr ++ = *uri;
2136
2137 *ptr = '\0';
2138
2139 /*
2140 * See if we had an error the last time around; if so, reconnect...
2141 */
2142
2143 if (http->status == HTTP_ERROR || http->status >= HTTP_BAD_REQUEST)
2144 if (httpReconnect(http))
2145 return (-1);
2146
2147 /*
2148 * Send the request header...
2149 */
2150
2151 http->state = request;
2152 if (request == HTTP_POST || request == HTTP_PUT)
2153 http->state ++;
2154
2155 http->status = HTTP_CONTINUE;
2156
2157 #ifdef HAVE_SSL
2158 if (http->encryption == HTTP_ENCRYPT_REQUIRED && !http->tls)
2159 {
2160 httpSetField(http, HTTP_FIELD_CONNECTION, "Upgrade");
2161 httpSetField(http, HTTP_FIELD_UPGRADE, "TLS/1.0,SSL/2.0,SSL/3.0");
2162 }
2163 #endif /* HAVE_SSL */
2164
2165 if (httpPrintf(http, "%s %s HTTP/1.1\r\n", codes[request], buf) < 1)
2166 {
2167 http->status = HTTP_ERROR;
2168 return (-1);
2169 }
2170
2171 for (i = 0; i < HTTP_FIELD_MAX; i ++)
2172 if (http->fields[i][0] != '\0')
2173 {
2174 DEBUG_printf(("%s: %s\n", http_fields[i], http->fields[i]));
2175
2176 if (httpPrintf(http, "%s: %s\r\n", http_fields[i], http->fields[i]) < 1)
2177 {
2178 http->status = HTTP_ERROR;
2179 return (-1);
2180 }
2181 }
2182
2183 if (http->cookie)
2184 if (httpPrintf(http, "Cookie: $Version=0; %s\r\n", http->cookie) < 1)
2185 {
2186 http->status = HTTP_ERROR;
2187 return (-1);
2188 }
2189
2190 if (http->expect == HTTP_CONTINUE &&
2191 (http->state == HTTP_POST_RECV || http->state == HTTP_PUT_RECV))
2192 if (httpPrintf(http, "Expect: 100-continue\r\n") < 1)
2193 {
2194 http->status = HTTP_ERROR;
2195 return (-1);
2196 }
2197
2198 if (httpPrintf(http, "\r\n") < 1)
2199 {
2200 http->status = HTTP_ERROR;
2201 return (-1);
2202 }
2203
2204 httpGetLength2(http);
2205 httpClearFields(http);
2206
2207 return (0);
2208 }
2209
2210
2211 #ifdef HAVE_SSL
2212 /*
2213 * 'http_setup_ssl()' - Set up SSL/TLS support on a connection.
2214 */
2215
2216 static int /* O - Status of connection */
2217 http_setup_ssl(http_t *http) /* I - HTTP connection */
2218 {
2219 # ifdef HAVE_LIBSSL
2220 SSL_CTX *context; /* Context for encryption */
2221 SSL *conn; /* Connection for encryption */
2222 # elif defined(HAVE_GNUTLS)
2223 http_tls_t *conn; /* TLS session object */
2224 gnutls_certificate_client_credentials *credentials;
2225 /* TLS credentials */
2226 # elif defined(HAVE_CDSASSL)
2227 OSStatus error; /* Error code */
2228 http_tls_t *conn; /* CDSA connection information */
2229 cdsa_conn_ref_t u; /* Connection reference union */
2230 # endif /* HAVE_LIBSSL */
2231
2232
2233 DEBUG_printf(("http_setup_ssl(http=%p)\n", http));
2234
2235 # ifdef HAVE_LIBSSL
2236 context = SSL_CTX_new(SSLv23_client_method());
2237
2238 SSL_CTX_set_options(context, SSL_OP_NO_SSLv2); /* Only use SSLv3 or TLS */
2239
2240 conn = SSL_new(context);
2241
2242 SSL_set_fd(conn, http->fd);
2243 if (SSL_connect(conn) != 1)
2244 {
2245 # ifdef DEBUG
2246 unsigned long error; /* Error code */
2247
2248 while ((error = ERR_get_error()) != 0)
2249 printf("http_setup_ssl: %s\n", ERR_error_string(error, NULL));
2250 # endif /* DEBUG */
2251
2252 SSL_CTX_free(context);
2253 SSL_free(conn);
2254
2255 # ifdef WIN32
2256 http->error = WSAGetLastError();
2257 # else
2258 http->error = errno;
2259 # endif /* WIN32 */
2260 http->status = HTTP_ERROR;
2261
2262 return (HTTP_ERROR);
2263 }
2264
2265 # elif defined(HAVE_GNUTLS)
2266 if ((conn = (http_tls_t *)malloc(sizeof(http_tls_t))) == NULL)
2267 {
2268 http->error = errno;
2269 http->status = HTTP_ERROR;
2270
2271 return (-1);
2272 }
2273
2274 credentials = (gnutls_certificate_client_credentials *)
2275 malloc(sizeof(gnutls_certificate_client_credentials));
2276 if (credentials == NULL)
2277 {
2278 free(conn);
2279
2280 http->error = errno;
2281 http->status = HTTP_ERROR;
2282
2283 return (-1);
2284 }
2285
2286 gnutls_certificate_allocate_credentials(credentials);
2287
2288 gnutls_init(&(conn->session), GNUTLS_CLIENT);
2289 gnutls_set_default_priority(conn->session);
2290 gnutls_credentials_set(conn->session, GNUTLS_CRD_CERTIFICATE, *credentials);
2291 gnutls_transport_set_ptr(conn->session,
2292 (gnutls_transport_ptr)((long)http->fd));
2293
2294 if ((gnutls_handshake(conn->session)) != GNUTLS_E_SUCCESS)
2295 {
2296 http->error = errno;
2297 http->status = HTTP_ERROR;
2298
2299 return (-1);
2300 }
2301
2302 conn->credentials = credentials;
2303
2304 # elif defined(HAVE_CDSASSL)
2305 conn = (http_tls_t *)calloc(1, sizeof(http_tls_t));
2306
2307 if (conn == NULL)
2308 return (-1);
2309
2310 if ((error = SSLNewContext(false, &conn->session)))
2311 {
2312 http->error = error;
2313 http->status = HTTP_ERROR;
2314
2315 free(conn);
2316 return (-1);
2317 }
2318
2319 /*
2320 * Use a union to resolve warnings about int/pointer size mismatches...
2321 */
2322
2323 u.connection = NULL;
2324 u.sock = http->fd;
2325 error = SSLSetConnection(conn->session, u.connection);
2326
2327 if (!error)
2328 error = SSLSetIOFuncs(conn->session, _httpReadCDSA, _httpWriteCDSA);
2329
2330 if (!error)
2331 error = SSLSetAllowsExpiredCerts(conn->session, true);
2332
2333 if (!error)
2334 error = SSLSetAllowsAnyRoot(conn->session, true);
2335
2336 if (!error)
2337 error = SSLSetProtocolVersionEnabled(conn->session, kSSLProtocol2, false);
2338
2339 if (!error)
2340 {
2341 while ((error = SSLHandshake(conn->session)) == errSSLWouldBlock)
2342 usleep(1000);
2343 }
2344
2345 if (error)
2346 {
2347 http->error = error;
2348 http->status = HTTP_ERROR;
2349
2350 SSLDisposeContext(conn->session);
2351
2352 free(conn);
2353
2354 return (-1);
2355 }
2356 # endif /* HAVE_CDSASSL */
2357
2358 http->tls = conn;
2359 return (0);
2360 }
2361 #endif /* HAVE_SSL */
2362
2363
2364 #ifdef HAVE_SSL
2365 /*
2366 * 'http_shutdown_ssl()' - Shut down SSL/TLS on a connection.
2367 */
2368
2369 static void
2370 http_shutdown_ssl(http_t *http) /* I - HTTP connection */
2371 {
2372 # ifdef HAVE_LIBSSL
2373 SSL_CTX *context; /* Context for encryption */
2374 SSL *conn; /* Connection for encryption */
2375
2376
2377 conn = (SSL *)(http->tls);
2378 context = SSL_get_SSL_CTX(conn);
2379
2380 SSL_shutdown(conn);
2381 SSL_CTX_free(context);
2382 SSL_free(conn);
2383
2384 # elif defined(HAVE_GNUTLS)
2385 http_tls_t *conn; /* Encryption session */
2386 gnutls_certificate_client_credentials *credentials;
2387 /* TLS credentials */
2388
2389
2390 conn = (http_tls_t *)(http->tls);
2391 credentials = (gnutls_certificate_client_credentials *)(conn->credentials);
2392
2393 gnutls_bye(conn->session, GNUTLS_SHUT_RDWR);
2394 gnutls_deinit(conn->session);
2395 gnutls_certificate_free_credentials(*credentials);
2396 free(credentials);
2397 free(conn);
2398
2399 # elif defined(HAVE_CDSASSL)
2400 http_tls_t *conn; /* CDSA connection information */
2401
2402
2403 conn = (http_tls_t *)(http->tls);
2404
2405 while (SSLClose(conn->session) == errSSLWouldBlock)
2406 usleep(1000);
2407
2408 SSLDisposeContext(conn->session);
2409
2410 if (conn->certsArray)
2411 CFRelease(conn->certsArray);
2412
2413 free(conn);
2414 # endif /* HAVE_LIBSSL */
2415
2416 http->tls = NULL;
2417 }
2418 #endif /* HAVE_SSL */
2419
2420
2421 #ifdef HAVE_SSL
2422 /*
2423 * 'http_upgrade()' - Force upgrade to TLS encryption.
2424 */
2425
2426 static int /* O - Status of connection */
2427 http_upgrade(http_t *http) /* I - HTTP connection */
2428 {
2429 int ret; /* Return value */
2430 http_t myhttp; /* Local copy of HTTP data */
2431
2432
2433 DEBUG_printf(("http_upgrade(%p)\n", http));
2434
2435 /*
2436 * Copy the HTTP data to a local variable so we can do the OPTIONS
2437 * request without interfering with the existing request data...
2438 */
2439
2440 memcpy(&myhttp, http, sizeof(myhttp));
2441
2442 /*
2443 * Send an OPTIONS request to the server, requiring SSL or TLS
2444 * encryption on the link...
2445 */
2446
2447 httpClearFields(&myhttp);
2448 httpSetField(&myhttp, HTTP_FIELD_CONNECTION, "upgrade");
2449 httpSetField(&myhttp, HTTP_FIELD_UPGRADE, "TLS/1.0, SSL/2.0, SSL/3.0");
2450
2451 if ((ret = httpOptions(&myhttp, "*")) == 0)
2452 {
2453 /*
2454 * Wait for the secure connection...
2455 */
2456
2457 while (httpUpdate(&myhttp) == HTTP_CONTINUE);
2458 }
2459
2460 httpFlush(&myhttp);
2461
2462 /*
2463 * Copy the HTTP data back over, if any...
2464 */
2465
2466 http->fd = myhttp.fd;
2467 http->error = myhttp.error;
2468 http->activity = myhttp.activity;
2469 http->status = myhttp.status;
2470 http->version = myhttp.version;
2471 http->keep_alive = myhttp.keep_alive;
2472 http->used = myhttp.used;
2473
2474 if (http->used)
2475 memcpy(http->buffer, myhttp.buffer, http->used);
2476
2477 http->auth_type = myhttp.auth_type;
2478 http->nonce_count = myhttp.nonce_count;
2479
2480 memcpy(http->nonce, myhttp.nonce, sizeof(http->nonce));
2481
2482 http->tls = myhttp.tls;
2483 http->encryption = myhttp.encryption;
2484
2485 /*
2486 * See if we actually went secure...
2487 */
2488
2489 if (!http->tls)
2490 {
2491 /*
2492 * Server does not support HTTP upgrade...
2493 */
2494
2495 DEBUG_puts("Server does not support HTTP upgrade!");
2496
2497 # ifdef WIN32
2498 closesocket(http->fd);
2499 # else
2500 close(http->fd);
2501 # endif
2502
2503 http->fd = -1;
2504
2505 return (-1);
2506 }
2507 else
2508 return (ret);
2509 }
2510 #endif /* HAVE_SSL */
2511
2512
2513 /*
2514 * 'http_wait()' - Wait for data available on a connection.
2515 */
2516
2517 static int /* O - 1 if data is available, 0 otherwise */
2518 http_wait(http_t *http, /* I - HTTP connection */
2519 int msec) /* I - Milliseconds to wait */
2520 {
2521 #ifndef WIN32
2522 struct rlimit limit; /* Runtime limit */
2523 int set_size; /* Size of select set */
2524 #endif /* !WIN32 */
2525 struct timeval timeout; /* Timeout */
2526 int nfds; /* Result from select() */
2527
2528
2529 DEBUG_printf(("http_wait(http=%p, msec=%d)\n", http, msec));
2530
2531 if (http->fd < 0)
2532 return (0);
2533
2534 /*
2535 * Check the SSL/TLS buffers for data first...
2536 */
2537
2538 #ifdef HAVE_SSL
2539 if (http->tls)
2540 {
2541 # ifdef HAVE_LIBSSL
2542 if (SSL_pending((SSL *)(http->tls)))
2543 return (1);
2544 # elif defined(HAVE_GNUTLS)
2545 if (gnutls_record_check_pending(((http_tls_t *)(http->tls))->session))
2546 return (1);
2547 # elif defined(HAVE_CDSASSL)
2548 size_t bytes; /* Bytes that are available */
2549
2550 if (!SSLGetBufferedReadSize(((http_tls_t *)http->tls)->session, &bytes) && bytes > 0)
2551 return (1);
2552 # endif /* HAVE_LIBSSL */
2553 }
2554 #endif /* HAVE_SSL */
2555
2556 /*
2557 * Then try doing a select() to poll the socket...
2558 */
2559
2560 if (!http->input_set)
2561 {
2562 #ifdef WIN32
2563 /*
2564 * Windows has a fixed-size select() structure, different (surprise,
2565 * surprise!) from all UNIX implementations. Just allocate this
2566 * fixed structure...
2567 */
2568
2569 http->input_set = calloc(1, sizeof(fd_set));
2570 #else
2571 /*
2572 * Allocate the select() input set based upon the max number of file
2573 * descriptors available for this process...
2574 */
2575
2576 getrlimit(RLIMIT_NOFILE, &limit);
2577
2578 set_size = (limit.rlim_cur + 31) / 8 + 4;
2579 if (set_size < sizeof(fd_set))
2580 set_size = sizeof(fd_set);
2581
2582 http->input_set = calloc(1, set_size);
2583 #endif /* WIN32 */
2584
2585 if (!http->input_set)
2586 return (0);
2587 }
2588
2589 do
2590 {
2591 FD_SET(http->fd, http->input_set);
2592
2593 DEBUG_printf(("http_wait: msec=%d, http->fd=%d\n", msec, http->fd));
2594
2595 if (msec >= 0)
2596 {
2597 timeout.tv_sec = msec / 1000;
2598 timeout.tv_usec = (msec % 1000) * 1000;
2599
2600 nfds = select(http->fd + 1, http->input_set, NULL, NULL, &timeout);
2601 }
2602 else
2603 nfds = select(http->fd + 1, http->input_set, NULL, NULL, NULL);
2604
2605 DEBUG_printf(("http_wait: select() returned %d...\n", nfds));
2606 }
2607 #ifdef WIN32
2608 while (nfds < 0 && WSAGetLastError() == WSAEINTR);
2609 #else
2610 while (nfds < 0 && errno == EINTR);
2611 #endif /* WIN32 */
2612
2613 FD_CLR(http->fd, http->input_set);
2614
2615 DEBUG_printf(("http_wait: returning with nfds=%d...\n", nfds));
2616
2617 return (nfds > 0);
2618 }
2619
2620
2621 /*
2622 * 'http_write()' - Write a buffer to a HTTP connection.
2623 */
2624
2625 static int /* O - Number of bytes written */
2626 http_write(http_t *http, /* I - HTTP connection */
2627 const char *buffer, /* I - Buffer for data */
2628 int length) /* I - Number of bytes to write */
2629 {
2630 int tbytes, /* Total bytes sent */
2631 bytes; /* Bytes sent */
2632
2633
2634 tbytes = 0;
2635
2636 while (length > 0)
2637 {
2638 #ifdef HAVE_SSL
2639 if (http->tls)
2640 bytes = http_write_ssl(http, buffer, length);
2641 else
2642 #endif /* HAVE_SSL */
2643 bytes = send(http->fd, buffer, length, 0);
2644
2645 if (bytes < 0)
2646 {
2647 #ifdef WIN32
2648 if (WSAGetLastError() != http->error)
2649 {
2650 http->error = WSAGetLastError();
2651 continue;
2652 }
2653 #else
2654 if (errno == EINTR)
2655 continue;
2656 else if (errno != http->error && errno != ECONNRESET)
2657 {
2658 http->error = errno;
2659 continue;
2660 }
2661 #endif /* WIN32 */
2662
2663 DEBUG_puts("http_write: error writing data...\n");
2664
2665 return (-1);
2666 }
2667
2668 buffer += bytes;
2669 tbytes += bytes;
2670 length -= bytes;
2671 }
2672
2673 #ifdef DEBUG
2674 {
2675 int i, j, ch;
2676 printf("http_write: wrote %d bytes: \n", tbytes);
2677 for (i = 0, buffer -= tbytes; i < tbytes; i += 16)
2678 {
2679 printf(" ");
2680
2681 for (j = 0; j < 16 && (i + j) < tbytes; j ++)
2682 printf(" %02X", buffer[i + j] & 255);
2683
2684 while (j < 16)
2685 {
2686 printf(" ");
2687 j ++;
2688 }
2689
2690 printf(" ");
2691 for (j = 0; j < 16 && (i + j) < tbytes; j ++)
2692 {
2693 ch = buffer[i + j] & 255;
2694
2695 if (ch < ' ' || ch == 127)
2696 ch = '.';
2697
2698 putchar(ch);
2699 }
2700 putchar('\n');
2701 }
2702 }
2703 #endif /* DEBUG */
2704
2705 return (tbytes);
2706 }
2707
2708
2709 /*
2710 * 'http_write_chunk()' - Write a chunked buffer.
2711 */
2712
2713 static int /* O - Number bytes written */
2714 http_write_chunk(http_t *http, /* I - HTTP connection */
2715 const char *buffer, /* I - Buffer to write */
2716 int length) /* I - Length of buffer */
2717 {
2718 char header[255]; /* Chunk header */
2719 int bytes; /* Bytes written */
2720
2721 DEBUG_printf(("http_write_chunk(http=%p, buffer=%p, length=%d)\n",
2722 http, buffer, length));
2723
2724 /*
2725 * Write the chunk header, data, and trailer.
2726 */
2727
2728 sprintf(header, "%x\r\n", length);
2729 if (http_write(http, header, strlen(header)) < 0)
2730 {
2731 DEBUG_puts(" http_write of length failed!");
2732 return (-1);
2733 }
2734
2735 if ((bytes = http_write(http, buffer, length)) < 0)
2736 {
2737 DEBUG_puts(" http_write of buffer failed!");
2738 return (-1);
2739 }
2740
2741 if (http_write(http, "\r\n", 2) < 0)
2742 {
2743 DEBUG_puts(" http_write of CR LF failed!");
2744 return (-1);
2745 }
2746
2747 return (bytes);
2748 }
2749
2750
2751 #ifdef HAVE_SSL
2752 /*
2753 * 'http_write_ssl()' - Write to a SSL/TLS connection.
2754 */
2755
2756 static int /* O - Bytes written */
2757 http_write_ssl(http_t *http, /* I - HTTP connection */
2758 const char *buf, /* I - Buffer holding data */
2759 int len) /* I - Length of buffer */
2760 {
2761 # if defined(HAVE_LIBSSL)
2762 return (SSL_write((SSL *)(http->tls), buf, len));
2763
2764 # elif defined(HAVE_GNUTLS)
2765 return (gnutls_record_send(((http_tls_t *)(http->tls))->session, buf, len));
2766 # elif defined(HAVE_CDSASSL)
2767 int result; /* Return value */
2768 OSStatus error; /* Error info */
2769 size_t processed; /* Number of bytes processed */
2770
2771
2772 error = SSLWrite(((http_tls_t *)http->tls)->session, buf, len, &processed);
2773
2774 switch (error)
2775 {
2776 case 0 :
2777 result = (int)processed;
2778 break;
2779 case errSSLClosedGraceful :
2780 result = 0;
2781 break;
2782 case errSSLWouldBlock :
2783 if (processed)
2784 result = (int)processed;
2785 else
2786 {
2787 result = -1;
2788 errno = EINTR;
2789 }
2790 break;
2791 default :
2792 errno = EPIPE;
2793 result = -1;
2794 break;
2795 }
2796
2797 return (result);
2798 # endif /* HAVE_LIBSSL */
2799 }
2800 #endif /* HAVE_SSL */
2801
2802
2803 /*
2804 * End of "$Id$".
2805 */
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