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1 /*
2 * "$Id: http.c 5282 2006-03-13 12:10:33Z 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 return (NULL);
871
872 #ifdef HAVE_SSL
873 if (http->tls)
874 bytes = http_read_ssl(http, http->buffer + http->used,
875 HTTP_MAX_BUFFER - http->used);
876 else
877 #endif /* HAVE_SSL */
878 bytes = recv(http->fd, http->buffer + http->used,
879 HTTP_MAX_BUFFER - http->used, 0);
880
881 DEBUG_printf(("httpGets: read %d bytes...\n", bytes));
882
883 if (bytes < 0)
884 {
885 /*
886 * Nope, can't get a line this time...
887 */
888
889 #ifdef WIN32
890 if (WSAGetLastError() != http->error)
891 {
892 http->error = WSAGetLastError();
893 continue;
894 }
895
896 DEBUG_printf(("httpGets: recv() error %d!\n", WSAGetLastError()));
897 #else
898 DEBUG_printf(("httpGets: recv() error %d!\n", errno));
899
900 if (errno == EINTR)
901 continue;
902 else if (errno != http->error)
903 {
904 http->error = errno;
905 continue;
906 }
907 #endif /* WIN32 */
908
909 return (NULL);
910 }
911 else if (bytes == 0)
912 {
913 http->error = EPIPE;
914
915 return (NULL);
916 }
917
918 /*
919 * Yup, update the amount used...
920 */
921
922 http->used += bytes;
923 }
924
925 /*
926 * Now copy as much of the current line as possible...
927 */
928
929 for (bufptr = http->buffer, bufend = http->buffer + http->used;
930 lineptr < lineend && bufptr < bufend;)
931 {
932 if (*bufptr == 0x0a)
933 {
934 eol = 1;
935 bufptr ++;
936 break;
937 }
938 else if (*bufptr == 0x0d)
939 bufptr ++;
940 else
941 *lineptr++ = *bufptr++;
942 }
943
944 http->used -= bufptr - http->buffer;
945 if (http->used > 0)
946 memmove(http->buffer, bufptr, http->used);
947
948 if (eol)
949 {
950 /*
951 * End of line...
952 */
953
954 http->activity = time(NULL);
955
956 *lineptr = '\0';
957
958 DEBUG_printf(("httpGets: Returning \"%s\"\n", line));
959
960 return (line);
961 }
962 }
963
964 DEBUG_puts("httpGets: No new line available!");
965
966 return (NULL);
967 }
968
969
970 /*
971 * 'httpHead()' - Send a HEAD request to the server.
972 */
973
974 int /* O - Status of call (0 = success) */
975 httpHead(http_t *http, /* I - HTTP connection */
976 const char *uri) /* I - URI for head */
977 {
978 return (http_send(http, HTTP_HEAD, uri));
979 }
980
981
982 /*
983 * 'httpInitialize()' - Initialize the HTTP interface library and set the
984 * default HTTP proxy (if any).
985 */
986
987 void
988 httpInitialize(void)
989 {
990 #ifdef HAVE_LIBSSL
991 # ifndef WIN32
992 struct timeval curtime; /* Current time in microseconds */
993 # endif /* !WIN32 */
994 int i; /* Looping var */
995 unsigned char data[1024]; /* Seed data */
996 #endif /* HAVE_LIBSSL */
997
998 #ifdef WIN32
999 WSADATA winsockdata; /* WinSock data */
1000 static int initialized = 0; /* Has WinSock been initialized? */
1001
1002
1003 if (!initialized)
1004 WSAStartup(MAKEWORD(1,1), &winsockdata);
1005 #elif !defined(SO_NOSIGPIPE)
1006 /*
1007 * Ignore SIGPIPE signals...
1008 */
1009
1010 # ifdef HAVE_SIGSET
1011 sigset(SIGPIPE, SIG_IGN);
1012 # elif defined(HAVE_SIGACTION)
1013 struct sigaction action; /* POSIX sigaction data */
1014
1015
1016 memset(&action, 0, sizeof(action));
1017 action.sa_handler = SIG_IGN;
1018 sigaction(SIGPIPE, &action, NULL);
1019 # else
1020 signal(SIGPIPE, SIG_IGN);
1021 # endif /* !SO_NOSIGPIPE */
1022 #endif /* WIN32 */
1023
1024 #ifdef HAVE_GNUTLS
1025 gnutls_global_init();
1026 #endif /* HAVE_GNUTLS */
1027
1028 #ifdef HAVE_LIBSSL
1029 SSL_load_error_strings();
1030 SSL_library_init();
1031
1032 /*
1033 * Using the current time is a dubious random seed, but on some systems
1034 * it is the best we can do (on others, this seed isn't even used...)
1035 */
1036
1037 #ifdef WIN32
1038 #else
1039 gettimeofday(&curtime, NULL);
1040 srand(curtime.tv_sec + curtime.tv_usec);
1041 #endif /* WIN32 */
1042
1043 for (i = 0; i < sizeof(data); i ++)
1044 data[i] = rand(); /* Yes, this is a poor source of random data... */
1045
1046 RAND_seed(&data, sizeof(data));
1047 #endif /* HAVE_LIBSSL */
1048 }
1049
1050
1051 /*
1052 * 'httpOptions()' - Send an OPTIONS request to the server.
1053 */
1054
1055 int /* O - Status of call (0 = success) */
1056 httpOptions(http_t *http, /* I - HTTP connection */
1057 const char *uri) /* I - URI for options */
1058 {
1059 return (http_send(http, HTTP_OPTIONS, uri));
1060 }
1061
1062
1063 /*
1064 * 'httpPost()' - Send a POST request to the server.
1065 */
1066
1067 int /* O - Status of call (0 = success) */
1068 httpPost(http_t *http, /* I - HTTP connection */
1069 const char *uri) /* I - URI for post */
1070 {
1071 return (http_send(http, HTTP_POST, uri));
1072 }
1073
1074
1075 /*
1076 * 'httpPrintf()' - Print a formatted string to a HTTP connection.
1077 *
1078 * @private@
1079 */
1080
1081 int /* O - Number of bytes written */
1082 httpPrintf(http_t *http, /* I - HTTP connection */
1083 const char *format, /* I - printf-style format string */
1084 ...) /* I - Additional args as needed */
1085 {
1086 int bytes; /* Number of bytes to write */
1087 char buf[16384]; /* Buffer for formatted string */
1088 va_list ap; /* Variable argument pointer */
1089
1090
1091 DEBUG_printf(("httpPrintf(http=%p, format=\"%s\", ...)\n", http, format));
1092
1093 va_start(ap, format);
1094 bytes = vsnprintf(buf, sizeof(buf), format, ap);
1095 va_end(ap);
1096
1097 DEBUG_printf(("httpPrintf: %s", buf));
1098
1099 if (http->wused)
1100 {
1101 DEBUG_puts(" flushing existing data...");
1102
1103 if (httpFlushWrite(http) < 0)
1104 return (-1);
1105 }
1106
1107 return (http_write(http, buf, bytes));
1108 }
1109
1110
1111 /*
1112 * 'httpPut()' - Send a PUT request to the server.
1113 */
1114
1115 int /* O - Status of call (0 = success) */
1116 httpPut(http_t *http, /* I - HTTP connection */
1117 const char *uri) /* I - URI to put */
1118 {
1119 return (http_send(http, HTTP_PUT, uri));
1120 }
1121
1122
1123 /*
1124 * 'httpRead()' - Read data from a HTTP connection.
1125 *
1126 * This function is deprecated. Use the httpRead2() function which can
1127 * read more than 2GB of data.
1128 *
1129 * @deprecated@
1130 */
1131
1132 int /* O - Number of bytes read */
1133 httpRead(http_t *http, /* I - HTTP connection */
1134 char *buffer, /* I - Buffer for data */
1135 int length) /* I - Maximum number of bytes */
1136 {
1137 return ((int)httpRead2(http, buffer, length));
1138 }
1139
1140
1141 /*
1142 * 'httpRead2()' - Read data from a HTTP connection.
1143 *
1144 * @since CUPS 1.2@
1145 */
1146
1147 ssize_t /* O - Number of bytes read */
1148 httpRead2(http_t *http, /* I - HTTP connection */
1149 char *buffer, /* I - Buffer for data */
1150 size_t length) /* I - Maximum number of bytes */
1151 {
1152 ssize_t bytes; /* Bytes read */
1153 char len[32]; /* Length string */
1154
1155
1156 DEBUG_printf(("httpRead(http=%p, buffer=%p, length=%d)\n",
1157 http, buffer, length));
1158
1159 if (http == NULL || buffer == NULL)
1160 return (-1);
1161
1162 http->activity = time(NULL);
1163
1164 if (length <= 0)
1165 return (0);
1166
1167 if (http->data_encoding == HTTP_ENCODE_CHUNKED &&
1168 http->data_remaining <= 0)
1169 {
1170 DEBUG_puts("httpRead2: Getting chunk length...");
1171
1172 if (httpGets(len, sizeof(len), http) == NULL)
1173 {
1174 DEBUG_puts("httpRead2: Could not get length!");
1175 return (0);
1176 }
1177
1178 http->data_remaining = strtoll(len, NULL, 16);
1179 if (http->data_remaining < 0)
1180 {
1181 DEBUG_puts("httpRead2: Negative chunk length!");
1182 return (0);
1183 }
1184 }
1185
1186 DEBUG_printf(("httpRead2: data_remaining=" CUPS_LLFMT "\n",
1187 CUPS_LLCAST http->data_remaining));
1188
1189 if (http->data_remaining <= 0)
1190 {
1191 /*
1192 * A zero-length chunk ends a transfer; unless we are reading POST
1193 * data, go idle...
1194 */
1195
1196 if (http->data_encoding == HTTP_ENCODE_CHUNKED)
1197 httpGets(len, sizeof(len), http);
1198
1199 if (http->state == HTTP_POST_RECV)
1200 http->state ++;
1201 else
1202 http->state = HTTP_WAITING;
1203
1204 /*
1205 * Prevent future reads for this request...
1206 */
1207
1208 http->data_encoding = HTTP_ENCODE_LENGTH;
1209
1210 return (0);
1211 }
1212 else if (length > http->data_remaining)
1213 length = http->data_remaining;
1214
1215 if (http->used == 0 && length <= 256)
1216 {
1217 /*
1218 * Buffer small reads for better performance...
1219 */
1220
1221 if (!http->blocking && !httpWait(http, 1000))
1222 return (0);
1223
1224 if (http->data_remaining > sizeof(http->buffer))
1225 bytes = sizeof(http->buffer);
1226 else
1227 bytes = http->data_remaining;
1228
1229 #ifdef HAVE_SSL
1230 if (http->tls)
1231 bytes = http_read_ssl(http, http->buffer, bytes);
1232 else
1233 #endif /* HAVE_SSL */
1234 {
1235 DEBUG_printf(("httpRead2: reading %d bytes from socket into buffer...\n",
1236 bytes));
1237
1238 bytes = recv(http->fd, http->buffer, bytes, 0);
1239
1240 DEBUG_printf(("httpRead2: read %d bytes from socket into buffer...\n",
1241 bytes));
1242 }
1243
1244 if (bytes > 0)
1245 http->used = bytes;
1246 else if (bytes < 0)
1247 {
1248 #ifdef WIN32
1249 http->error = WSAGetLastError();
1250 return (-1);
1251 #else
1252 if (errno != EINTR)
1253 {
1254 http->error = errno;
1255 return (-1);
1256 }
1257 #endif /* WIN32 */
1258 }
1259 else
1260 {
1261 http->error = EPIPE;
1262 return (0);
1263 }
1264 }
1265
1266 if (http->used > 0)
1267 {
1268 if (length > http->used)
1269 length = http->used;
1270
1271 bytes = length;
1272
1273 DEBUG_printf(("httpRead2: grabbing %d bytes from input buffer...\n", bytes));
1274
1275 memcpy(buffer, http->buffer, length);
1276 http->used -= length;
1277
1278 if (http->used > 0)
1279 memmove(http->buffer, http->buffer + length, http->used);
1280 }
1281 #ifdef HAVE_SSL
1282 else if (http->tls)
1283 {
1284 if (!http->blocking && !httpWait(http, 1000))
1285 return (0);
1286
1287 bytes = http_read_ssl(http, buffer, length);
1288 }
1289 #endif /* HAVE_SSL */
1290 else
1291 {
1292 if (!http->blocking && !httpWait(http, 1000))
1293 return (0);
1294
1295 DEBUG_printf(("httpRead2: reading %d bytes from socket...\n", length));
1296
1297 while ((bytes = recv(http->fd, buffer, length, 0)) < 0)
1298 if (errno != EINTR)
1299 break;
1300
1301 DEBUG_printf(("httpRead2: read %d bytes from socket...\n", bytes));
1302 }
1303
1304 if (bytes > 0)
1305 {
1306 http->data_remaining -= bytes;
1307
1308 if (http->data_remaining <= INT_MAX)
1309 http->_data_remaining = (int)http->data_remaining;
1310 else
1311 http->_data_remaining = INT_MAX;
1312 }
1313 else if (bytes < 0)
1314 {
1315 #ifdef WIN32
1316 http->error = WSAGetLastError();
1317 #else
1318 if (errno == EINTR)
1319 bytes = 0;
1320 else
1321 http->error = errno;
1322 #endif /* WIN32 */
1323 }
1324 else
1325 {
1326 http->error = EPIPE;
1327 return (0);
1328 }
1329
1330 if (http->data_remaining == 0)
1331 {
1332 if (http->data_encoding == HTTP_ENCODE_CHUNKED)
1333 httpGets(len, sizeof(len), http);
1334
1335 if (http->data_encoding != HTTP_ENCODE_CHUNKED)
1336 {
1337 if (http->state == HTTP_POST_RECV)
1338 http->state ++;
1339 else
1340 http->state = HTTP_WAITING;
1341 }
1342 }
1343
1344 #ifdef DEBUG
1345 {
1346 int i, j, ch;
1347 printf("httpRead2: Read %d bytes:\n", bytes);
1348 for (i = 0; i < bytes; i += 16)
1349 {
1350 printf(" ");
1351
1352 for (j = 0; j < 16 && (i + j) < bytes; j ++)
1353 printf(" %02X", buffer[i + j] & 255);
1354
1355 while (j < 16)
1356 {
1357 printf(" ");
1358 j ++;
1359 }
1360
1361 printf(" ");
1362 for (j = 0; j < 16 && (i + j) < bytes; j ++)
1363 {
1364 ch = buffer[i + j] & 255;
1365
1366 if (ch < ' ' || ch >= 127)
1367 ch = '.';
1368
1369 putchar(ch);
1370 }
1371 putchar('\n');
1372 }
1373 }
1374 #endif /* DEBUG */
1375
1376 return (bytes);
1377 }
1378
1379
1380 #if defined(HAVE_SSL) && defined(HAVE_CDSASSL)
1381 /*
1382 * '_httpReadCDSA()' - Read function for CDSA decryption code.
1383 */
1384
1385 OSStatus /* O - -1 on error, 0 on success */
1386 _httpReadCDSA(
1387 SSLConnectionRef connection, /* I - SSL/TLS connection */
1388 void *data, /* I - Data buffer */
1389 size_t *dataLength) /* IO - Number of bytes */
1390 {
1391 OSStatus result; /* Return value */
1392 ssize_t bytes; /* Number of bytes read */
1393
1394 do
1395 bytes = recv((int)connection, data, *dataLength, 0);
1396 while (bytes == -1 && errno == EINTR);
1397
1398 if (bytes == *dataLength)
1399 result = 0;
1400 else if (bytes > 0)
1401 {
1402 *dataLength = bytes;
1403 result = errSSLWouldBlock;
1404 }
1405 else
1406 {
1407 *dataLength = 0;
1408
1409 if (bytes == 0)
1410 result = errSSLClosedAbort;
1411 else if (errno == EAGAIN)
1412 result = errSSLWouldBlock;
1413 else if (errno == EPIPE)
1414 result = errSSLClosedAbort;
1415 else
1416 result = errSSLInternal;
1417 }
1418
1419 return result;
1420 }
1421 #endif /* HAVE_SSL && HAVE_CDSASSL */
1422
1423
1424 /*
1425 * 'httpReconnect()' - Reconnect to a HTTP server.
1426 */
1427
1428 int /* O - 0 on success, non-zero on failure */
1429 httpReconnect(http_t *http) /* I - HTTP connection */
1430 {
1431 http_addrlist_t *addr; /* Connected address */
1432
1433
1434 DEBUG_printf(("httpReconnect(http=%p)\n", http));
1435
1436 if (!http)
1437 return (-1);
1438
1439 #ifdef HAVE_SSL
1440 if (http->tls)
1441 http_shutdown_ssl(http);
1442 #endif /* HAVE_SSL */
1443
1444 /*
1445 * Close any previously open socket...
1446 */
1447
1448 if (http->fd >= 0)
1449 {
1450 #ifdef WIN32
1451 closesocket(http->fd);
1452 #else
1453 close(http->fd);
1454 #endif /* WIN32 */
1455
1456 http->fd = -1;
1457 }
1458
1459 /*
1460 * Connect to the server...
1461 */
1462
1463 if ((addr = httpAddrConnect(http->addrlist, &(http->fd))) == NULL)
1464 {
1465 /*
1466 * Unable to connect...
1467 */
1468
1469 #ifdef WIN32
1470 http->error = WSAGetLastError();
1471 #else
1472 http->error = errno;
1473 #endif /* WIN32 */
1474 http->status = HTTP_ERROR;
1475
1476 return (-1);
1477 }
1478
1479 http->hostaddr = &(addr->addr);
1480 http->error = 0;
1481 http->status = HTTP_CONTINUE;
1482
1483 #ifdef HAVE_SSL
1484 if (http->encryption == HTTP_ENCRYPT_ALWAYS)
1485 {
1486 /*
1487 * Always do encryption via SSL.
1488 */
1489
1490 if (http_setup_ssl(http) != 0)
1491 {
1492 #ifdef WIN32
1493 closesocket(http->fd);
1494 #else
1495 close(http->fd);
1496 #endif /* WIN32 */
1497
1498 return (-1);
1499 }
1500 }
1501 else if (http->encryption == HTTP_ENCRYPT_REQUIRED)
1502 return (http_upgrade(http));
1503 #endif /* HAVE_SSL */
1504
1505 return (0);
1506 }
1507
1508
1509 /*
1510 * 'httpSetCookie()' - Set the cookie value(s)...
1511 *
1512 * @since CUPS 1.1.19@
1513 */
1514
1515 void
1516 httpSetCookie(http_t *http, /* I - Connection */
1517 const char *cookie) /* I - Cookie string */
1518 {
1519 if (!http)
1520 return;
1521
1522 if (http->cookie)
1523 free(http->cookie);
1524
1525 if (cookie)
1526 http->cookie = strdup(cookie);
1527 else
1528 http->cookie = NULL;
1529 }
1530
1531
1532 /*
1533 * 'httpSetExpect()' - Set the Expect: header in a request.
1534 *
1535 * Currently only HTTP_CONTINUE is supported for the "expect" argument.
1536 *
1537 * @since CUPS 1.2@
1538 */
1539
1540 void
1541 httpSetExpect(http_t *http, /* I - HTTP connection */
1542 http_status_t expect) /* I - HTTP status to expect (HTTP_CONTINUE) */
1543 {
1544 if (http)
1545 http->expect = expect;
1546 }
1547
1548
1549 /*
1550 * 'httpSetField()' - Set the value of an HTTP header.
1551 */
1552
1553 void
1554 httpSetField(http_t *http, /* I - HTTP connection */
1555 http_field_t field, /* I - Field index */
1556 const char *value) /* I - Value */
1557 {
1558 if (http == NULL ||
1559 field < HTTP_FIELD_ACCEPT_LANGUAGE ||
1560 field > HTTP_FIELD_WWW_AUTHENTICATE ||
1561 value == NULL)
1562 return;
1563
1564 strlcpy(http->fields[field], value, HTTP_MAX_VALUE);
1565 }
1566
1567
1568 /*
1569 * 'httpSetLength()' - Set the content-length and content-encoding.
1570 *
1571 * @since CUPS 1.2@
1572 */
1573
1574 void
1575 httpSetLength(http_t *http, /* I - HTTP connection */
1576 size_t length) /* I - Length (0 for chunked) */
1577 {
1578 if (!http)
1579 return;
1580
1581 if (!length)
1582 {
1583 strcpy(http->fields[HTTP_FIELD_TRANSFER_ENCODING], "chunked");
1584 http->fields[HTTP_FIELD_CONTENT_LENGTH][0] = '\0';
1585 }
1586 else
1587 {
1588 http->fields[HTTP_FIELD_TRANSFER_ENCODING][0] = '\0';
1589 snprintf(http->fields[HTTP_FIELD_CONTENT_LENGTH], HTTP_MAX_VALUE,
1590 CUPS_LLFMT, CUPS_LLCAST length);
1591 }
1592 }
1593
1594
1595 /*
1596 * 'httpTrace()' - Send an TRACE request to the server.
1597 */
1598
1599 int /* O - Status of call (0 = success) */
1600 httpTrace(http_t *http, /* I - HTTP connection */
1601 const char *uri) /* I - URI for trace */
1602 {
1603 return (http_send(http, HTTP_TRACE, uri));
1604 }
1605
1606
1607 /*
1608 * 'httpUpdate()' - Update the current HTTP state for incoming data.
1609 */
1610
1611 http_status_t /* O - HTTP status */
1612 httpUpdate(http_t *http) /* I - HTTP connection */
1613 {
1614 char line[32768], /* Line from connection... */
1615 *value; /* Pointer to value on line */
1616 http_field_t field; /* Field index */
1617 int major, minor, /* HTTP version numbers */
1618 status; /* Request status */
1619
1620
1621 DEBUG_printf(("httpUpdate(http=%p), state=%d\n", http, http->state));
1622
1623 /*
1624 * Flush pending data, if any...
1625 */
1626
1627 if (http->wused)
1628 {
1629 DEBUG_puts(" flushing buffer...");
1630
1631 if (httpFlushWrite(http) < 0)
1632 return (HTTP_ERROR);
1633 }
1634
1635 /*
1636 * If we haven't issued any commands, then there is nothing to "update"...
1637 */
1638
1639 if (http->state == HTTP_WAITING)
1640 return (HTTP_CONTINUE);
1641
1642 /*
1643 * Grab all of the lines we can from the connection...
1644 */
1645
1646 while (httpGets(line, sizeof(line), http) != NULL)
1647 {
1648 DEBUG_printf(("httpUpdate: Got \"%s\"\n", line));
1649
1650 if (line[0] == '\0')
1651 {
1652 /*
1653 * Blank line means the start of the data section (if any). Return
1654 * the result code, too...
1655 *
1656 * If we get status 100 (HTTP_CONTINUE), then we *don't* change states.
1657 * Instead, we just return HTTP_CONTINUE to the caller and keep on
1658 * tryin'...
1659 */
1660
1661 if (http->status == HTTP_CONTINUE)
1662 return (http->status);
1663
1664 if (http->status < HTTP_BAD_REQUEST)
1665 http->digest_tries = 0;
1666
1667 #ifdef HAVE_SSL
1668 if (http->status == HTTP_SWITCHING_PROTOCOLS && !http->tls)
1669 {
1670 if (http_setup_ssl(http) != 0)
1671 {
1672 # ifdef WIN32
1673 closesocket(http->fd);
1674 # else
1675 close(http->fd);
1676 # endif /* WIN32 */
1677
1678 return (HTTP_ERROR);
1679 }
1680
1681 return (HTTP_CONTINUE);
1682 }
1683 #endif /* HAVE_SSL */
1684
1685 httpGetLength2(http);
1686
1687 switch (http->state)
1688 {
1689 case HTTP_GET :
1690 case HTTP_POST :
1691 case HTTP_POST_RECV :
1692 case HTTP_PUT :
1693 http->state ++;
1694 case HTTP_POST_SEND :
1695 case HTTP_HEAD :
1696 break;
1697
1698 default :
1699 http->state = HTTP_WAITING;
1700 break;
1701 }
1702
1703 return (http->status);
1704 }
1705 else if (strncmp(line, "HTTP/", 5) == 0)
1706 {
1707 /*
1708 * Got the beginning of a response...
1709 */
1710
1711 if (sscanf(line, "HTTP/%d.%d%d", &major, &minor, &status) != 3)
1712 return (HTTP_ERROR);
1713
1714 http->version = (http_version_t)(major * 100 + minor);
1715 http->status = (http_status_t)status;
1716 }
1717 else if ((value = strchr(line, ':')) != NULL)
1718 {
1719 /*
1720 * Got a value...
1721 */
1722
1723 *value++ = '\0';
1724 while (isspace(*value & 255))
1725 value ++;
1726
1727 /*
1728 * Be tolerants of servers that send unknown attribute fields...
1729 */
1730
1731 if (!strcasecmp(line, "expect"))
1732 {
1733 /*
1734 * "Expect: 100-continue" or similar...
1735 */
1736
1737 http->expect = (http_status_t)atoi(value);
1738 }
1739 else if (!strcasecmp(line, "cookie"))
1740 {
1741 /*
1742 * "Cookie: name=value[; name=value ...]" - replaces previous cookies...
1743 */
1744
1745 httpSetCookie(http, value);
1746 }
1747 else if ((field = http_field(line)) == HTTP_FIELD_UNKNOWN)
1748 {
1749 DEBUG_printf(("httpUpdate: unknown field %s seen!\n", line));
1750 continue;
1751 }
1752 else
1753 httpSetField(http, field, value);
1754 }
1755 else
1756 {
1757 http->status = HTTP_ERROR;
1758 return (HTTP_ERROR);
1759 }
1760 }
1761
1762 /*
1763 * See if there was an error...
1764 */
1765
1766 if (http->error == EPIPE && http->status > HTTP_CONTINUE)
1767 return (http->status);
1768
1769 if (http->error)
1770 {
1771 DEBUG_printf(("httpUpdate: socket error %d - %s\n", http->error,
1772 strerror(http->error)));
1773 http->status = HTTP_ERROR;
1774 return (HTTP_ERROR);
1775 }
1776
1777 /*
1778 * If we haven't already returned, then there is nothing new...
1779 */
1780
1781 return (HTTP_CONTINUE);
1782 }
1783
1784
1785 /*
1786 * 'httpWait()' - Wait for data available on a connection.
1787 *
1788 * @since CUPS 1.1.19@
1789 */
1790
1791 int /* O - 1 if data is available, 0 otherwise */
1792 httpWait(http_t *http, /* I - HTTP connection */
1793 int msec) /* I - Milliseconds to wait */
1794 {
1795 /*
1796 * First see if there is data in the buffer...
1797 */
1798
1799 if (http == NULL)
1800 return (0);
1801
1802 if (http->used)
1803 return (1);
1804
1805 /*
1806 * If not, check the SSL/TLS buffers and do a select() on the connection...
1807 */
1808
1809 return (http_wait(http, msec));
1810 }
1811
1812
1813 /*
1814 * 'httpWrite()' - Write data to a HTTP connection.
1815 *
1816 * This function is deprecated. Use the httpWrite2() function which can
1817 * write more than 2GB of data.
1818 *
1819 * @deprecated@
1820 */
1821
1822 int /* O - Number of bytes written */
1823 httpWrite(http_t *http, /* I - HTTP connection */
1824 const char *buffer, /* I - Buffer for data */
1825 int length) /* I - Number of bytes to write */
1826 {
1827 return ((int)httpWrite2(http, buffer, length));
1828 }
1829
1830
1831 /*
1832 * 'httpWrite2()' - Write data to a HTTP connection.
1833 *
1834 * @since CUPS 1.2@
1835 */
1836
1837 ssize_t /* O - Number of bytes written */
1838 httpWrite2(http_t *http, /* I - HTTP connection */
1839 const char *buffer, /* I - Buffer for data */
1840 size_t length) /* I - Number of bytes to write */
1841 {
1842 ssize_t bytes; /* Bytes written */
1843
1844
1845 DEBUG_printf(("httpWrite(http=%p, buffer=%p, length=%d)\n", http,
1846 buffer, length));
1847
1848 /*
1849 * Range check input...
1850 */
1851
1852 if (http == NULL || buffer == NULL)
1853 return (-1);
1854
1855 /*
1856 * Mark activity on the connection...
1857 */
1858
1859 http->activity = time(NULL);
1860
1861 /*
1862 * Buffer small writes for better performance...
1863 */
1864
1865 if (length > 0)
1866 {
1867 if (http->wused && (length + http->wused) > sizeof(http->wbuffer))
1868 {
1869 DEBUG_printf((" flushing buffer (wused=%d, length=%d)\n",
1870 http->wused, length));
1871
1872 httpFlushWrite(http);
1873 }
1874
1875 if ((length + http->wused) <= sizeof(http->wbuffer))
1876 {
1877 /*
1878 * Write to buffer...
1879 */
1880
1881 DEBUG_printf((" copying %d bytes to wbuffer...\n", length));
1882
1883 memcpy(http->wbuffer + http->wused, buffer, length);
1884 http->wused += length;
1885 bytes = length;
1886 }
1887 else
1888 {
1889 /*
1890 * Otherwise write the data directly...
1891 */
1892
1893 DEBUG_printf((" writing %d bytes to socket...\n", length));
1894
1895 if (http->data_encoding == HTTP_ENCODE_CHUNKED)
1896 bytes = http_write_chunk(http, buffer, length);
1897 else
1898 bytes = http_write(http, buffer, length);
1899
1900 DEBUG_printf((" wrote %d bytes...\n", bytes));
1901 }
1902
1903 if (http->data_encoding == HTTP_ENCODE_LENGTH)
1904 http->data_remaining -= bytes;
1905 }
1906 else
1907 bytes = 0;
1908
1909 /*
1910 * Handle end-of-request processing...
1911 */
1912
1913 if ((http->data_encoding == HTTP_ENCODE_CHUNKED && length == 0) ||
1914 (http->data_encoding == HTTP_ENCODE_LENGTH && http->data_remaining == 0))
1915 {
1916 /*
1917 * Finished with the transfer; unless we are sending POST or PUT
1918 * data, go idle...
1919 */
1920
1921 DEBUG_puts("httpWrite: changing states...");
1922
1923 if (http->wused)
1924 httpFlushWrite(http);
1925
1926 if (http->data_encoding == HTTP_ENCODE_CHUNKED)
1927 {
1928 /*
1929 * Send a 0-length chunk at the end of the request...
1930 */
1931
1932 http_write(http, "0\r\n\r\n", 5);
1933
1934 /*
1935 * Reset the data state...
1936 */
1937
1938 http->data_encoding = HTTP_ENCODE_LENGTH;
1939 http->data_remaining = 0;
1940 }
1941
1942 if (http->state == HTTP_POST_RECV)
1943 http->state ++;
1944 else if (http->state == HTTP_PUT_RECV)
1945 http->state = HTTP_STATUS;
1946 else
1947 http->state = HTTP_WAITING;
1948 }
1949
1950 return (bytes);
1951 }
1952
1953
1954 #if defined(HAVE_SSL) && defined(HAVE_CDSASSL)
1955 /*
1956 * '_httpWriteCDSA()' - Write function for CDSA encryption code.
1957 */
1958
1959 OSStatus /* O - -1 on error, 0 on success */
1960 _httpWriteCDSA(
1961 SSLConnectionRef connection, /* I - SSL/TLS connection */
1962 const void *data, /* I - Data buffer */
1963 size_t *dataLength) /* IO - Number of bytes */
1964 {
1965 OSStatus result; /* Return value */
1966 ssize_t bytes; /* Number of bytes read */
1967
1968 do
1969 bytes = write((int)connection, data, *dataLength);
1970 while (bytes == -1 && errno == EINTR);
1971
1972 if (bytes == *dataLength)
1973 result = 0;
1974 else if (bytes >= 0)
1975 {
1976 *dataLength = bytes;
1977 result = errSSLWouldBlock;
1978 }
1979 else
1980 {
1981 *dataLength = 0;
1982
1983 if (errno == EAGAIN)
1984 result = errSSLWouldBlock;
1985 else if (errno == EPIPE)
1986 result = errSSLClosedAbort;
1987 else
1988 result = errSSLInternal;
1989 }
1990
1991 return result;
1992 }
1993 #endif /* HAVE_SSL && HAVE_CDSASSL */
1994
1995
1996 /*
1997 * 'http_field()' - Return the field index for a field name.
1998 */
1999
2000 static http_field_t /* O - Field index */
2001 http_field(const char *name) /* I - String name */
2002 {
2003 int i; /* Looping var */
2004
2005
2006 for (i = 0; i < HTTP_FIELD_MAX; i ++)
2007 if (strcasecmp(name, http_fields[i]) == 0)
2008 return ((http_field_t)i);
2009
2010 return (HTTP_FIELD_UNKNOWN);
2011 }
2012
2013
2014 #ifdef HAVE_SSL
2015 /*
2016 * 'http_read_ssl()' - Read from a SSL/TLS connection.
2017 */
2018
2019 static int /* O - Bytes read */
2020 http_read_ssl(http_t *http, /* I - HTTP connection */
2021 char *buf, /* I - Buffer to store data */
2022 int len) /* I - Length of buffer */
2023 {
2024 # if defined(HAVE_LIBSSL)
2025 return (SSL_read((SSL *)(http->tls), buf, len));
2026
2027 # elif defined(HAVE_GNUTLS)
2028 return (gnutls_record_recv(((http_tls_t *)(http->tls))->session, buf, len));
2029
2030 # elif defined(HAVE_CDSASSL)
2031 int result; /* Return value */
2032 OSStatus error; /* Error info */
2033 size_t processed; /* Number of bytes processed */
2034
2035
2036 error = SSLRead((SSLContextRef)http->tls, buf, len, &processed);
2037
2038 switch (error)
2039 {
2040 case 0 :
2041 result = (int)processed;
2042 break;
2043 case errSSLClosedGraceful :
2044 result = 0;
2045 break;
2046 case errSSLWouldBlock :
2047 if (processed)
2048 result = (int)processed;
2049 else
2050 {
2051 result = -1;
2052 errno = EINTR;
2053 }
2054 break;
2055 default :
2056 errno = EPIPE;
2057 result = -1;
2058 break;
2059 }
2060
2061 return (result);
2062 # endif /* HAVE_LIBSSL */
2063 }
2064 #endif /* HAVE_SSL */
2065
2066
2067 /*
2068 * 'http_send()' - Send a request with all fields and the trailing blank line.
2069 */
2070
2071 static int /* O - 0 on success, non-zero on error */
2072 http_send(http_t *http, /* I - HTTP connection */
2073 http_state_t request, /* I - Request code */
2074 const char *uri) /* I - URI */
2075 {
2076 int i; /* Looping var */
2077 char *ptr, /* Pointer in buffer */
2078 buf[1024]; /* Encoded URI buffer */
2079 static const char * const codes[] =
2080 { /* Request code strings */
2081 NULL,
2082 "OPTIONS",
2083 "GET",
2084 NULL,
2085 "HEAD",
2086 "POST",
2087 NULL,
2088 NULL,
2089 "PUT",
2090 NULL,
2091 "DELETE",
2092 "TRACE",
2093 "CLOSE"
2094 };
2095 static const char hex[] = "0123456789ABCDEF";
2096 /* Hex digits */
2097
2098
2099 DEBUG_printf(("http_send(http=%p, request=HTTP_%s, uri=\"%s\")\n",
2100 http, codes[request], uri));
2101
2102 if (http == NULL || uri == NULL)
2103 return (-1);
2104
2105 /*
2106 * Set the User-Agent field if it isn't already...
2107 */
2108
2109 if (!http->fields[HTTP_FIELD_USER_AGENT][0])
2110 httpSetField(http, HTTP_FIELD_USER_AGENT, CUPS_MINIMAL);
2111
2112 /*
2113 * Encode the URI as needed...
2114 */
2115
2116 for (ptr = buf; *uri != '\0' && ptr < (buf + sizeof(buf) - 1); uri ++)
2117 if (*uri <= ' ' || *uri >= 127)
2118 {
2119 if (ptr < (buf + sizeof(buf) - 1))
2120 *ptr ++ = '%';
2121 if (ptr < (buf + sizeof(buf) - 1))
2122 *ptr ++ = hex[(*uri >> 4) & 15];
2123 if (ptr < (buf + sizeof(buf) - 1))
2124 *ptr ++ = hex[*uri & 15];
2125 }
2126 else
2127 *ptr ++ = *uri;
2128
2129 *ptr = '\0';
2130
2131 /*
2132 * See if we had an error the last time around; if so, reconnect...
2133 */
2134
2135 if (http->status == HTTP_ERROR || http->status >= HTTP_BAD_REQUEST)
2136 if (httpReconnect(http))
2137 return (-1);
2138
2139 /*
2140 * Send the request header...
2141 */
2142
2143 http->state = request;
2144 if (request == HTTP_POST || request == HTTP_PUT)
2145 http->state ++;
2146
2147 http->status = HTTP_CONTINUE;
2148
2149 #ifdef HAVE_SSL
2150 if (http->encryption == HTTP_ENCRYPT_REQUIRED && !http->tls)
2151 {
2152 httpSetField(http, HTTP_FIELD_CONNECTION, "Upgrade");
2153 httpSetField(http, HTTP_FIELD_UPGRADE, "TLS/1.0,SSL/2.0,SSL/3.0");
2154 }
2155 #endif /* HAVE_SSL */
2156
2157 if (httpPrintf(http, "%s %s HTTP/1.1\r\n", codes[request], buf) < 1)
2158 {
2159 http->status = HTTP_ERROR;
2160 return (-1);
2161 }
2162
2163 for (i = 0; i < HTTP_FIELD_MAX; i ++)
2164 if (http->fields[i][0] != '\0')
2165 {
2166 DEBUG_printf(("%s: %s\n", http_fields[i], http->fields[i]));
2167
2168 if (httpPrintf(http, "%s: %s\r\n", http_fields[i], http->fields[i]) < 1)
2169 {
2170 http->status = HTTP_ERROR;
2171 return (-1);
2172 }
2173 }
2174
2175 if (http->cookie)
2176 if (httpPrintf(http, "Cookie: $Version=0; %s\r\n", http->cookie) < 1)
2177 {
2178 http->status = HTTP_ERROR;
2179 return (-1);
2180 }
2181
2182 if (http->expect == HTTP_CONTINUE &&
2183 (http->state == HTTP_POST_RECV || http->state == HTTP_PUT_RECV))
2184 if (httpPrintf(http, "Expect: 100-continue\r\n") < 1)
2185 {
2186 http->status = HTTP_ERROR;
2187 return (-1);
2188 }
2189
2190 if (httpPrintf(http, "\r\n") < 1)
2191 {
2192 http->status = HTTP_ERROR;
2193 return (-1);
2194 }
2195
2196 httpGetLength2(http);
2197 httpClearFields(http);
2198
2199 return (0);
2200 }
2201
2202
2203 #ifdef HAVE_SSL
2204 /*
2205 * 'http_setup_ssl()' - Set up SSL/TLS support on a connection.
2206 */
2207
2208 static int /* O - Status of connection */
2209 http_setup_ssl(http_t *http) /* I - HTTP connection */
2210 {
2211 # ifdef HAVE_LIBSSL
2212 SSL_CTX *context; /* Context for encryption */
2213 SSL *conn; /* Connection for encryption */
2214 # elif defined(HAVE_GNUTLS)
2215 http_tls_t *conn; /* TLS session object */
2216 gnutls_certificate_client_credentials *credentials;
2217 /* TLS credentials */
2218 # elif defined(HAVE_CDSASSL)
2219 SSLContextRef conn; /* Context for encryption */
2220 OSStatus error; /* Error info */
2221 # endif /* HAVE_LIBSSL */
2222
2223
2224 DEBUG_printf(("http_setup_ssl(http=%p)\n", http));
2225
2226 # ifdef HAVE_LIBSSL
2227 context = SSL_CTX_new(SSLv23_client_method());
2228
2229 SSL_CTX_set_options(context, SSL_OP_NO_SSLv2); /* Only use SSLv3 or TLS */
2230
2231 conn = SSL_new(context);
2232
2233 SSL_set_fd(conn, http->fd);
2234 if (SSL_connect(conn) != 1)
2235 {
2236 # ifdef DEBUG
2237 unsigned long error; /* Error code */
2238
2239 while ((error = ERR_get_error()) != 0)
2240 printf("http_setup_ssl: %s\n", ERR_error_string(error, NULL));
2241 # endif /* DEBUG */
2242
2243 SSL_CTX_free(context);
2244 SSL_free(conn);
2245
2246 # ifdef WIN32
2247 http->error = WSAGetLastError();
2248 # else
2249 http->error = errno;
2250 # endif /* WIN32 */
2251 http->status = HTTP_ERROR;
2252
2253 return (HTTP_ERROR);
2254 }
2255
2256 # elif defined(HAVE_GNUTLS)
2257 conn = (http_tls_t *)malloc(sizeof(http_tls_t));
2258
2259 if (conn == NULL)
2260 {
2261 http->error = errno;
2262 http->status = HTTP_ERROR;
2263
2264 return (-1);
2265 }
2266
2267 credentials = (gnutls_certificate_client_credentials *)
2268 malloc(sizeof(gnutls_certificate_client_credentials));
2269 if (credentials == NULL)
2270 {
2271 free(conn);
2272
2273 http->error = errno;
2274 http->status = HTTP_ERROR;
2275
2276 return (-1);
2277 }
2278
2279 gnutls_certificate_allocate_credentials(credentials);
2280
2281 gnutls_init(&(conn->session), GNUTLS_CLIENT);
2282 gnutls_set_default_priority(conn->session);
2283 gnutls_credentials_set(conn->session, GNUTLS_CRD_CERTIFICATE, *credentials);
2284 gnutls_transport_set_ptr(conn->session,
2285 (gnutls_transport_ptr)((long)http->fd));
2286
2287 if ((gnutls_handshake(conn->session)) != GNUTLS_E_SUCCESS)
2288 {
2289 http->error = errno;
2290 http->status = HTTP_ERROR;
2291
2292 return (-1);
2293 }
2294
2295 conn->credentials = credentials;
2296
2297 # elif defined(HAVE_CDSASSL)
2298 error = SSLNewContext(false, &conn);
2299
2300 if (!error)
2301 error = SSLSetIOFuncs(conn, _httpReadCDSA, _httpWriteCDSA);
2302
2303 if (!error)
2304 error = SSLSetConnection(conn, (SSLConnectionRef)http->fd);
2305
2306 if (!error)
2307 error = SSLSetAllowsExpiredCerts(conn, true);
2308
2309 if (!error)
2310 error = SSLSetAllowsAnyRoot(conn, true);
2311
2312 if (!error)
2313 {
2314 while ((error = SSLHandshake(conn)) == errSSLWouldBlock)
2315 usleep(1000);
2316 }
2317
2318 if (error != 0)
2319 {
2320 http->error = error;
2321 http->status = HTTP_ERROR;
2322
2323 SSLDisposeContext(conn);
2324
2325 close(http->fd);
2326
2327 return (-1);
2328 }
2329 # endif /* HAVE_CDSASSL */
2330
2331 http->tls = conn;
2332 return (0);
2333 }
2334 #endif /* HAVE_SSL */
2335
2336
2337 #ifdef HAVE_SSL
2338 /*
2339 * 'http_shutdown_ssl()' - Shut down SSL/TLS on a connection.
2340 */
2341
2342 static void
2343 http_shutdown_ssl(http_t *http) /* I - HTTP connection */
2344 {
2345 # ifdef HAVE_LIBSSL
2346 SSL_CTX *context; /* Context for encryption */
2347 SSL *conn; /* Connection for encryption */
2348
2349
2350 conn = (SSL *)(http->tls);
2351 context = SSL_get_SSL_CTX(conn);
2352
2353 SSL_shutdown(conn);
2354 SSL_CTX_free(context);
2355 SSL_free(conn);
2356
2357 # elif defined(HAVE_GNUTLS)
2358 http_tls_t *conn; /* Encryption session */
2359 gnutls_certificate_client_credentials *credentials;
2360 /* TLS credentials */
2361
2362
2363 conn = (http_tls_t *)(http->tls);
2364 credentials = (gnutls_certificate_client_credentials *)(conn->credentials);
2365
2366 gnutls_bye(conn->session, GNUTLS_SHUT_RDWR);
2367 gnutls_deinit(conn->session);
2368 gnutls_certificate_free_credentials(*credentials);
2369 free(credentials);
2370 free(conn);
2371
2372 # elif defined(HAVE_CDSASSL)
2373 while (SSLClose((SSLContextRef)http->tls) == errSSLWouldBlock)
2374 usleep(1000);
2375
2376 SSLDisposeContext((SSLContextRef)http->tls);
2377 # endif /* HAVE_LIBSSL */
2378
2379 http->tls = NULL;
2380 }
2381 #endif /* HAVE_SSL */
2382
2383
2384 #ifdef HAVE_SSL
2385 /*
2386 * 'http_upgrade()' - Force upgrade to TLS encryption.
2387 */
2388
2389 static int /* O - Status of connection */
2390 http_upgrade(http_t *http) /* I - HTTP connection */
2391 {
2392 int ret; /* Return value */
2393 http_t myhttp; /* Local copy of HTTP data */
2394
2395
2396 DEBUG_printf(("http_upgrade(%p)\n", http));
2397
2398 /*
2399 * Copy the HTTP data to a local variable so we can do the OPTIONS
2400 * request without interfering with the existing request data...
2401 */
2402
2403 memcpy(&myhttp, http, sizeof(myhttp));
2404
2405 /*
2406 * Send an OPTIONS request to the server, requiring SSL or TLS
2407 * encryption on the link...
2408 */
2409
2410 httpClearFields(&myhttp);
2411 httpSetField(&myhttp, HTTP_FIELD_CONNECTION, "upgrade");
2412 httpSetField(&myhttp, HTTP_FIELD_UPGRADE, "TLS/1.0, SSL/2.0, SSL/3.0");
2413
2414 if ((ret = httpOptions(&myhttp, "*")) == 0)
2415 {
2416 /*
2417 * Wait for the secure connection...
2418 */
2419
2420 while (httpUpdate(&myhttp) == HTTP_CONTINUE);
2421 }
2422
2423 httpFlush(&myhttp);
2424
2425 /*
2426 * Copy the HTTP data back over, if any...
2427 */
2428
2429 http->fd = myhttp.fd;
2430 http->error = myhttp.error;
2431 http->activity = myhttp.activity;
2432 http->status = myhttp.status;
2433 http->version = myhttp.version;
2434 http->keep_alive = myhttp.keep_alive;
2435 http->used = myhttp.used;
2436
2437 if (http->used)
2438 memcpy(http->buffer, myhttp.buffer, http->used);
2439
2440 http->auth_type = myhttp.auth_type;
2441 http->nonce_count = myhttp.nonce_count;
2442
2443 memcpy(http->nonce, myhttp.nonce, sizeof(http->nonce));
2444
2445 http->tls = myhttp.tls;
2446 http->encryption = myhttp.encryption;
2447
2448 /*
2449 * See if we actually went secure...
2450 */
2451
2452 if (!http->tls)
2453 {
2454 /*
2455 * Server does not support HTTP upgrade...
2456 */
2457
2458 DEBUG_puts("Server does not support HTTP upgrade!");
2459
2460 # ifdef WIN32
2461 closesocket(http->fd);
2462 # else
2463 close(http->fd);
2464 # endif
2465
2466 http->fd = -1;
2467
2468 return (-1);
2469 }
2470 else
2471 return (ret);
2472 }
2473 #endif /* HAVE_SSL */
2474
2475
2476 /*
2477 * 'http_wait()' - Wait for data available on a connection.
2478 */
2479
2480 static int /* O - 1 if data is available, 0 otherwise */
2481 http_wait(http_t *http, /* I - HTTP connection */
2482 int msec) /* I - Milliseconds to wait */
2483 {
2484 #ifndef WIN32
2485 struct rlimit limit; /* Runtime limit */
2486 int set_size; /* Size of select set */
2487 #endif /* !WIN32 */
2488 struct timeval timeout; /* Timeout */
2489 int nfds; /* Result from select() */
2490
2491
2492 DEBUG_printf(("http_wait(http=%p, msec=%d)\n", http, msec));
2493
2494 if (http->fd < 0)
2495 return (0);
2496
2497 /*
2498 * Check the SSL/TLS buffers for data first...
2499 */
2500
2501 #ifdef HAVE_SSL
2502 if (http->tls)
2503 {
2504 # ifdef HAVE_LIBSSL
2505 if (SSL_pending((SSL *)(http->tls)))
2506 return (1);
2507 # elif defined(HAVE_GNUTLS)
2508 if (gnutls_record_check_pending(((http_tls_t *)(http->tls))->session))
2509 return (1);
2510 # elif defined(HAVE_CDSASSL)
2511 size_t bytes; /* Bytes that are available */
2512
2513 if (!SSLGetBufferedReadSize((SSLContextRef)http->tls, &bytes) && bytes > 0)
2514 return (1);
2515 # endif /* HAVE_LIBSSL */
2516 }
2517 #endif /* HAVE_SSL */
2518
2519 /*
2520 * Then try doing a select() to poll the socket...
2521 */
2522
2523 if (!http->input_set)
2524 {
2525 #ifdef WIN32
2526 /*
2527 * Windows has a fixed-size select() structure, different (surprise,
2528 * surprise!) from all UNIX implementations. Just allocate this
2529 * fixed structure...
2530 */
2531
2532 http->input_set = calloc(1, sizeof(fd_set));
2533 #else
2534 /*
2535 * Allocate the select() input set based upon the max number of file
2536 * descriptors available for this process...
2537 */
2538
2539 getrlimit(RLIMIT_NOFILE, &limit);
2540
2541 set_size = (limit.rlim_cur + 31) / 8 + 4;
2542 if (set_size < sizeof(fd_set))
2543 set_size = sizeof(fd_set);
2544
2545 http->input_set = calloc(1, set_size);
2546 #endif /* WIN32 */
2547
2548 if (!http->input_set)
2549 return (0);
2550 }
2551
2552 do
2553 {
2554 FD_SET(http->fd, http->input_set);
2555
2556 if (msec >= 0)
2557 {
2558 timeout.tv_sec = msec / 1000;
2559 timeout.tv_usec = (msec % 1000) * 1000;
2560
2561 nfds = select(http->fd + 1, http->input_set, NULL, NULL, &timeout);
2562 }
2563 else
2564 nfds = select(http->fd + 1, http->input_set, NULL, NULL, NULL);
2565 }
2566 #ifdef WIN32
2567 while (nfds < 0 && WSAGetLastError() == WSAEINTR);
2568 #else
2569 while (nfds < 0 && errno == EINTR);
2570 #endif /* WIN32 */
2571
2572 FD_CLR(http->fd, http->input_set);
2573
2574 return (nfds > 0);
2575 }
2576
2577
2578 /*
2579 * 'http_write()' - Write a buffer to a HTTP connection.
2580 */
2581
2582 static int /* O - Number of bytes written */
2583 http_write(http_t *http, /* I - HTTP connection */
2584 const char *buffer, /* I - Buffer for data */
2585 int length) /* I - Number of bytes to write */
2586 {
2587 int tbytes, /* Total bytes sent */
2588 bytes; /* Bytes sent */
2589
2590
2591 tbytes = 0;
2592
2593 while (length > 0)
2594 {
2595 #ifdef HAVE_SSL
2596 if (http->tls)
2597 bytes = http_write_ssl(http, buffer, length);
2598 else
2599 #endif /* HAVE_SSL */
2600 bytes = send(http->fd, buffer, length, 0);
2601
2602 if (bytes < 0)
2603 {
2604 #ifdef WIN32
2605 if (WSAGetLastError() != http->error)
2606 {
2607 http->error = WSAGetLastError();
2608 continue;
2609 }
2610 #else
2611 if (errno == EINTR)
2612 continue;
2613 else if (errno != http->error && errno != ECONNRESET)
2614 {
2615 http->error = errno;
2616 continue;
2617 }
2618 #endif /* WIN32 */
2619
2620 DEBUG_puts("http_write: error writing data...\n");
2621
2622 return (-1);
2623 }
2624
2625 buffer += bytes;
2626 tbytes += bytes;
2627 length -= bytes;
2628 }
2629
2630 #ifdef DEBUG
2631 {
2632 int i, j, ch;
2633 printf("http_write: wrote %d bytes: \n", tbytes);
2634 for (i = 0, buffer -= tbytes; i < tbytes; i += 16)
2635 {
2636 printf(" ");
2637
2638 for (j = 0; j < 16 && (i + j) < tbytes; j ++)
2639 printf(" %02X", buffer[i + j] & 255);
2640
2641 while (j < 16)
2642 {
2643 printf(" ");
2644 j ++;
2645 }
2646
2647 printf(" ");
2648 for (j = 0; j < 16 && (i + j) < tbytes; j ++)
2649 {
2650 ch = buffer[i + j] & 255;
2651
2652 if (ch < ' ' || ch == 127)
2653 ch = '.';
2654
2655 putchar(ch);
2656 }
2657 putchar('\n');
2658 }
2659 }
2660 #endif /* DEBUG */
2661
2662 return (tbytes);
2663 }
2664
2665
2666 /*
2667 * 'http_write_chunk()' - Write a chunked buffer.
2668 */
2669
2670 static int /* O - Number bytes written */
2671 http_write_chunk(http_t *http, /* I - HTTP connection */
2672 const char *buffer, /* I - Buffer to write */
2673 int length) /* I - Length of buffer */
2674 {
2675 char header[255]; /* Chunk header */
2676 int bytes; /* Bytes written */
2677
2678 DEBUG_printf(("http_write_chunk(http=%p, buffer=%p, length=%d)\n",
2679 http, buffer, length));
2680
2681 /*
2682 * Write the chunk header, data, and trailer.
2683 */
2684
2685 sprintf(header, "%x\r\n", length);
2686 if (http_write(http, header, strlen(header)) < 0)
2687 {
2688 DEBUG_puts(" http_write of length failed!");
2689 return (-1);
2690 }
2691
2692 if ((bytes = http_write(http, buffer, length)) < 0)
2693 {
2694 DEBUG_puts(" http_write of buffer failed!");
2695 return (-1);
2696 }
2697
2698 if (http_write(http, "\r\n", 2) < 0)
2699 {
2700 DEBUG_puts(" http_write of CR LF failed!");
2701 return (-1);
2702 }
2703
2704 return (bytes);
2705 }
2706
2707
2708 #ifdef HAVE_SSL
2709 /*
2710 * 'http_write_ssl()' - Write to a SSL/TLS connection.
2711 */
2712
2713 static int /* O - Bytes written */
2714 http_write_ssl(http_t *http, /* I - HTTP connection */
2715 const char *buf, /* I - Buffer holding data */
2716 int len) /* I - Length of buffer */
2717 {
2718 # if defined(HAVE_LIBSSL)
2719 return (SSL_write((SSL *)(http->tls), buf, len));
2720
2721 # elif defined(HAVE_GNUTLS)
2722 return (gnutls_record_send(((http_tls_t *)(http->tls))->session, buf, len));
2723 # elif defined(HAVE_CDSASSL)
2724 int result; /* Return value */
2725 OSStatus error; /* Error info */
2726 size_t processed; /* Number of bytes processed */
2727
2728
2729 error = SSLWrite((SSLContextRef)http->tls, buf, len, &processed);
2730
2731 switch (error)
2732 {
2733 case 0 :
2734 result = (int)processed;
2735 break;
2736 case errSSLClosedGraceful :
2737 result = 0;
2738 break;
2739 case errSSLWouldBlock :
2740 if (processed)
2741 result = (int)processed;
2742 else
2743 {
2744 result = -1;
2745 errno = EINTR;
2746 }
2747 break;
2748 default :
2749 errno = EPIPE;
2750 result = -1;
2751 break;
2752 }
2753
2754 return (result);
2755 # endif /* HAVE_LIBSSL */
2756 }
2757 #endif /* HAVE_SSL */
2758
2759
2760 /*
2761 * End of "$Id: http.c 5282 2006-03-13 12:10:33Z mike $".
2762 */
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