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Merge changes from CUPS 1.7b1-r10947.
[thirdparty/cups.git] / cups / http-support.c
1 /*
2 * "$Id: http-support.c 7952 2008-09-17 00:56:20Z mike $"
3 *
4 * HTTP support routines for CUPS.
5 *
6 * Copyright 2007-2013 by Apple Inc.
7 * Copyright 1997-2007 by Easy Software Products, all rights reserved.
8 *
9 * These coded instructions, statements, and computer programs are the
10 * property of Apple Inc. and are protected by Federal copyright
11 * law. Distribution and use rights are outlined in the file "LICENSE.txt"
12 * which should have been included with this file. If this file is
13 * file is missing or damaged, see the license at "http://www.cups.org/".
14 *
15 * This file is subject to the Apple OS-Developed Software exception.
16 *
17 * Contents:
18 *
19 * httpAssembleURI() - Assemble a uniform resource identifier from its
20 * components.
21 * httpAssembleURIf() - Assemble a uniform resource identifier from its
22 * components with a formatted resource.
23 * httpAssembleUUID() - Assemble a name-based UUID URN conforming to RFC
24 * 4122.
25 * httpDecode64() - Base64-decode a string.
26 * httpDecode64_2() - Base64-decode a string.
27 * httpEncode64() - Base64-encode a string.
28 * httpEncode64_2() - Base64-encode a string.
29 * httpGetDateString() - Get a formatted date/time string from a time value.
30 * httpGetDateString2() - Get a formatted date/time string from a time value.
31 * httpGetDateTime() - Get a time value from a formatted date/time string.
32 * httpSeparate() - Separate a Universal Resource Identifier into its
33 * components.
34 * httpSeparate2() - Separate a Universal Resource Identifier into its
35 * components.
36 * httpSeparateURI() - Separate a Universal Resource Identifier into its
37 * components.
38 * httpStatus() - Return a short string describing a HTTP status
39 * code.
40 * _cups_hstrerror() - hstrerror() emulation function for Solaris and
41 * others.
42 * _httpDecodeURI() - Percent-decode a HTTP request URI.
43 * _httpEncodeURI() - Percent-encode a HTTP request URI.
44 * _httpResolveURI() - Resolve a DNS-SD URI.
45 * http_client_cb() - Client callback for resolving URI.
46 * http_copy_decode() - Copy and decode a URI.
47 * http_copy_encode() - Copy and encode a URI.
48 * http_poll_cb() - Wait for input on the specified file descriptors.
49 * http_resolve_cb() - Build a device URI for the given service name.
50 * http_resolve_cb() - Build a device URI for the given service name.
51 */
52
53 /*
54 * Include necessary headers...
55 */
56
57 #include "cups-private.h"
58 #ifdef HAVE_DNSSD
59 # include <dns_sd.h>
60 # ifdef WIN32
61 # include <io.h>
62 # elif defined(HAVE_POLL)
63 # include <poll.h>
64 # else
65 # include <sys/select.h>
66 # endif /* WIN32 */
67 #elif defined(HAVE_AVAHI)
68 # include <avahi-client/client.h>
69 # include <avahi-client/lookup.h>
70 # include <avahi-common/simple-watch.h>
71 #endif /* HAVE_DNSSD */
72
73
74 /*
75 * Local types...
76 */
77
78 typedef struct _http_uribuf_s /* URI buffer */
79 {
80 #ifdef HAVE_AVAHI
81 AvahiSimplePoll *poll; /* Poll state */
82 #endif /* HAVE_AVAHI */
83 char *buffer; /* Pointer to buffer */
84 size_t bufsize; /* Size of buffer */
85 int options; /* Options passed to _httpResolveURI */
86 const char *resource; /* Resource from URI */
87 } _http_uribuf_t;
88
89
90 /*
91 * Local globals...
92 */
93
94 static const char * const http_days[7] =
95 {
96 "Sun",
97 "Mon",
98 "Tue",
99 "Wed",
100 "Thu",
101 "Fri",
102 "Sat"
103 };
104 static const char * const http_months[12] =
105 {
106 "Jan",
107 "Feb",
108 "Mar",
109 "Apr",
110 "May",
111 "Jun",
112 "Jul",
113 "Aug",
114 "Sep",
115 "Oct",
116 "Nov",
117 "Dec"
118 };
119
120
121 /*
122 * Local functions...
123 */
124
125 static const char *http_copy_decode(char *dst, const char *src,
126 int dstsize, const char *term,
127 int decode);
128 static char *http_copy_encode(char *dst, const char *src,
129 char *dstend, const char *reserved,
130 const char *term, int encode);
131 #ifdef HAVE_DNSSD
132 static void DNSSD_API http_resolve_cb(DNSServiceRef sdRef,
133 DNSServiceFlags flags,
134 uint32_t interfaceIndex,
135 DNSServiceErrorType errorCode,
136 const char *fullName,
137 const char *hostTarget,
138 uint16_t port, uint16_t txtLen,
139 const unsigned char *txtRecord,
140 void *context);
141 #endif /* HAVE_DNSSD */
142
143 #ifdef HAVE_AVAHI
144 static void http_client_cb(AvahiClient *client,
145 AvahiClientState state, void *simple_poll);
146 static int http_poll_cb(struct pollfd *pollfds, unsigned int num_pollfds,
147 int timeout, void *context);
148 static void http_resolve_cb(AvahiServiceResolver *resolver,
149 AvahiIfIndex interface,
150 AvahiProtocol protocol,
151 AvahiResolverEvent event,
152 const char *name, const char *type,
153 const char *domain, const char *host_name,
154 const AvahiAddress *address, uint16_t port,
155 AvahiStringList *txt,
156 AvahiLookupResultFlags flags, void *context);
157 #endif /* HAVE_AVAHI */
158
159
160 /*
161 * 'httpAssembleURI()' - Assemble a uniform resource identifier from its
162 * components.
163 *
164 * This function escapes reserved characters in the URI depending on the
165 * value of the "encoding" argument. You should use this function in
166 * place of traditional string functions whenever you need to create a
167 * URI string.
168 *
169 * @since CUPS 1.2/OS X 10.5@
170 */
171
172 http_uri_status_t /* O - URI status */
173 httpAssembleURI(
174 http_uri_coding_t encoding, /* I - Encoding flags */
175 char *uri, /* I - URI buffer */
176 int urilen, /* I - Size of URI buffer */
177 const char *scheme, /* I - Scheme name */
178 const char *username, /* I - Username */
179 const char *host, /* I - Hostname or address */
180 int port, /* I - Port number */
181 const char *resource) /* I - Resource */
182 {
183 char *ptr, /* Pointer into URI buffer */
184 *end; /* End of URI buffer */
185
186
187 /*
188 * Range check input...
189 */
190
191 if (!uri || urilen < 1 || !scheme || port < 0)
192 {
193 if (uri)
194 *uri = '\0';
195
196 return (HTTP_URI_STATUS_BAD_ARGUMENTS);
197 }
198
199 /*
200 * Assemble the URI starting with the scheme...
201 */
202
203 end = uri + urilen - 1;
204 ptr = http_copy_encode(uri, scheme, end, NULL, NULL, 0);
205
206 if (!ptr)
207 goto assemble_overflow;
208
209 if (!strcmp(scheme, "mailto"))
210 {
211 /*
212 * mailto: only has :, no //...
213 */
214
215 if (ptr < end)
216 *ptr++ = ':';
217 else
218 goto assemble_overflow;
219 }
220 else
221 {
222 /*
223 * Schemes other than mailto: all have //...
224 */
225
226 if ((ptr + 2) < end)
227 {
228 *ptr++ = ':';
229 *ptr++ = '/';
230 *ptr++ = '/';
231 }
232 else
233 goto assemble_overflow;
234 }
235
236 /*
237 * Next the username and hostname, if any...
238 */
239
240 if (host)
241 {
242 if (username && *username)
243 {
244 /*
245 * Add username@ first...
246 */
247
248 ptr = http_copy_encode(ptr, username, end, "/?#[]@", NULL,
249 encoding & HTTP_URI_CODING_USERNAME);
250
251 if (!ptr)
252 goto assemble_overflow;
253
254 if (ptr < end)
255 *ptr++ = '@';
256 else
257 goto assemble_overflow;
258 }
259
260 /*
261 * Then add the hostname. Since IPv6 is a particular pain to deal
262 * with, we have several special cases to deal with. If we get
263 * an IPv6 address with brackets around it, assume it is already in
264 * URI format. Since DNS-SD service names can sometimes look like
265 * raw IPv6 addresses, we specifically look for "._tcp" in the name,
266 * too...
267 */
268
269 if (host[0] != '[' && strchr(host, ':') && !strstr(host, "._tcp"))
270 {
271 /*
272 * We have a raw IPv6 address...
273 */
274
275 if (strchr(host, '%'))
276 {
277 /*
278 * We have a link-local address, add "[v1." prefix...
279 */
280
281 if ((ptr + 4) < end)
282 {
283 *ptr++ = '[';
284 *ptr++ = 'v';
285 *ptr++ = '1';
286 *ptr++ = '.';
287 }
288 else
289 goto assemble_overflow;
290 }
291 else
292 {
293 /*
294 * We have a normal address, add "[" prefix...
295 */
296
297 if (ptr < end)
298 *ptr++ = '[';
299 else
300 goto assemble_overflow;
301 }
302
303 /*
304 * Copy the rest of the IPv6 address, and terminate with "]".
305 */
306
307 while (ptr < end && *host)
308 {
309 if (*host == '%')
310 {
311 *ptr++ = '+'; /* Convert zone separator */
312 host ++;
313 }
314 else
315 *ptr++ = *host++;
316 }
317
318 if (*host)
319 goto assemble_overflow;
320
321 if (ptr < end)
322 *ptr++ = ']';
323 else
324 goto assemble_overflow;
325 }
326 else
327 {
328 /*
329 * Otherwise, just copy the host string...
330 */
331 ptr = http_copy_encode(ptr, host, end, "<>{}|^:/?#[]@\\\"", NULL,
332 encoding & HTTP_URI_CODING_HOSTNAME);
333
334 if (!ptr)
335 goto assemble_overflow;
336 }
337
338 /*
339 * Finish things off with the port number...
340 */
341
342 if (port > 0)
343 {
344 snprintf(ptr, end - ptr + 1, ":%d", port);
345 ptr += strlen(ptr);
346
347 if (ptr >= end)
348 goto assemble_overflow;
349 }
350 }
351
352 /*
353 * Last but not least, add the resource string...
354 */
355
356 if (resource)
357 {
358 char *query; /* Pointer to query string */
359
360
361 /*
362 * Copy the resource string up to the query string if present...
363 */
364
365 query = strchr(resource, '?');
366 ptr = http_copy_encode(ptr, resource, end, NULL, "?",
367 encoding & HTTP_URI_CODING_RESOURCE);
368 if (!ptr)
369 goto assemble_overflow;
370
371 if (query)
372 {
373 /*
374 * Copy query string without encoding...
375 */
376
377 ptr = http_copy_encode(ptr, query, end, NULL, NULL,
378 encoding & HTTP_URI_CODING_QUERY);
379 if (!ptr)
380 goto assemble_overflow;
381 }
382 }
383 else if (ptr < end)
384 *ptr++ = '/';
385 else
386 goto assemble_overflow;
387
388 /*
389 * Nul-terminate the URI buffer and return with no errors...
390 */
391
392 *ptr = '\0';
393
394 return (HTTP_URI_STATUS_OK);
395
396 /*
397 * Clear the URI string and return an overflow error; I don't usually
398 * like goto's, but in this case it makes sense...
399 */
400
401 assemble_overflow:
402
403 *uri = '\0';
404 return (HTTP_URI_STATUS_OVERFLOW);
405 }
406
407
408 /*
409 * 'httpAssembleURIf()' - Assemble a uniform resource identifier from its
410 * components with a formatted resource.
411 *
412 * This function creates a formatted version of the resource string
413 * argument "resourcef" and escapes reserved characters in the URI
414 * depending on the value of the "encoding" argument. You should use
415 * this function in place of traditional string functions whenever
416 * you need to create a URI string.
417 *
418 * @since CUPS 1.2/OS X 10.5@
419 */
420
421 http_uri_status_t /* O - URI status */
422 httpAssembleURIf(
423 http_uri_coding_t encoding, /* I - Encoding flags */
424 char *uri, /* I - URI buffer */
425 int urilen, /* I - Size of URI buffer */
426 const char *scheme, /* I - Scheme name */
427 const char *username, /* I - Username */
428 const char *host, /* I - Hostname or address */
429 int port, /* I - Port number */
430 const char *resourcef, /* I - Printf-style resource */
431 ...) /* I - Additional arguments as needed */
432 {
433 va_list ap; /* Pointer to additional arguments */
434 char resource[1024]; /* Formatted resource string */
435 int bytes; /* Bytes in formatted string */
436
437
438 /*
439 * Range check input...
440 */
441
442 if (!uri || urilen < 1 || !scheme || port < 0 || !resourcef)
443 {
444 if (uri)
445 *uri = '\0';
446
447 return (HTTP_URI_STATUS_BAD_ARGUMENTS);
448 }
449
450 /*
451 * Format the resource string and assemble the URI...
452 */
453
454 va_start(ap, resourcef);
455 bytes = vsnprintf(resource, sizeof(resource), resourcef, ap);
456 va_end(ap);
457
458 if (bytes >= sizeof(resource))
459 {
460 *uri = '\0';
461 return (HTTP_URI_STATUS_OVERFLOW);
462 }
463 else
464 return (httpAssembleURI(encoding, uri, urilen, scheme, username, host,
465 port, resource));
466 }
467
468
469 /*
470 * 'httpAssembleUUID()' - Assemble a name-based UUID URN conforming to RFC 4122.
471 *
472 * This function creates a unique 128-bit identifying number using the server
473 * name, port number, random data, and optionally an object name and/or object
474 * number. The result is formatted as a UUID URN as defined in RFC 4122.
475 *
476 * The buffer needs to be at least 46 bytes in size.
477 *
478 * @since CUPS 1.7@
479 */
480
481 char * /* I - UUID string */
482 httpAssembleUUID(const char *server, /* I - Server name */
483 int port, /* I - Port number */
484 const char *name, /* I - Object name or NULL */
485 int number, /* I - Object number or 0 */
486 char *buffer, /* I - String buffer */
487 size_t bufsize) /* I - Size of buffer */
488 {
489 char data[1024]; /* Source string for MD5 */
490 _cups_md5_state_t md5state; /* MD5 state */
491 unsigned char md5sum[16]; /* MD5 digest/sum */
492
493
494 /*
495 * Build a version 3 UUID conforming to RFC 4122.
496 *
497 * Start with the MD5 sum of the server, port, object name and
498 * number, and some random data on the end.
499 */
500
501 snprintf(data, sizeof(data), "%s:%d:%s:%d:%04x:%04x", server,
502 port, name ? name : server, number,
503 (unsigned)CUPS_RAND() & 0xffff, (unsigned)CUPS_RAND() & 0xffff);
504
505 _cupsMD5Init(&md5state);
506 _cupsMD5Append(&md5state, (unsigned char *)data, strlen(data));
507 _cupsMD5Finish(&md5state, md5sum);
508
509 /*
510 * Generate the UUID from the MD5...
511 */
512
513 snprintf(buffer, bufsize,
514 "urn:uuid:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-"
515 "%02x%02x%02x%02x%02x%02x",
516 md5sum[0], md5sum[1], md5sum[2], md5sum[3], md5sum[4], md5sum[5],
517 (md5sum[6] & 15) | 0x30, md5sum[7], (md5sum[8] & 0x3f) | 0x40,
518 md5sum[9], md5sum[10], md5sum[11], md5sum[12], md5sum[13],
519 md5sum[14], md5sum[15]);
520
521 return (buffer);
522 }
523
524 /* For OS X 10.8 and earlier */
525 char *_httpAssembleUUID(const char *server, int port, const char *name,
526 int number, char *buffer, size_t bufsize)
527 {
528 return (httpAssembleUUID(server, port, name, number, buffer, bufsize));
529 }
530
531
532 /*
533 * 'httpDecode64()' - Base64-decode a string.
534 *
535 * This function is deprecated. Use the httpDecode64_2() function instead
536 * which provides buffer length arguments.
537 *
538 * @deprecated@
539 */
540
541 char * /* O - Decoded string */
542 httpDecode64(char *out, /* I - String to write to */
543 const char *in) /* I - String to read from */
544 {
545 int outlen; /* Output buffer length */
546
547
548 /*
549 * Use the old maximum buffer size for binary compatibility...
550 */
551
552 outlen = 512;
553
554 return (httpDecode64_2(out, &outlen, in));
555 }
556
557
558 /*
559 * 'httpDecode64_2()' - Base64-decode a string.
560 *
561 * @since CUPS 1.1.21/OS X 10.4@
562 */
563
564 char * /* O - Decoded string */
565 httpDecode64_2(char *out, /* I - String to write to */
566 int *outlen, /* IO - Size of output string */
567 const char *in) /* I - String to read from */
568 {
569 int pos, /* Bit position */
570 base64; /* Value of this character */
571 char *outptr, /* Output pointer */
572 *outend; /* End of output buffer */
573
574
575 /*
576 * Range check input...
577 */
578
579 if (!out || !outlen || *outlen < 1 || !in)
580 return (NULL);
581
582 if (!*in)
583 {
584 *out = '\0';
585 *outlen = 0;
586
587 return (out);
588 }
589
590 /*
591 * Convert from base-64 to bytes...
592 */
593
594 for (outptr = out, outend = out + *outlen - 1, pos = 0; *in != '\0'; in ++)
595 {
596 /*
597 * Decode this character into a number from 0 to 63...
598 */
599
600 if (*in >= 'A' && *in <= 'Z')
601 base64 = *in - 'A';
602 else if (*in >= 'a' && *in <= 'z')
603 base64 = *in - 'a' + 26;
604 else if (*in >= '0' && *in <= '9')
605 base64 = *in - '0' + 52;
606 else if (*in == '+')
607 base64 = 62;
608 else if (*in == '/')
609 base64 = 63;
610 else if (*in == '=')
611 break;
612 else
613 continue;
614
615 /*
616 * Store the result in the appropriate chars...
617 */
618
619 switch (pos)
620 {
621 case 0 :
622 if (outptr < outend)
623 *outptr = base64 << 2;
624 pos ++;
625 break;
626 case 1 :
627 if (outptr < outend)
628 *outptr++ |= (base64 >> 4) & 3;
629 if (outptr < outend)
630 *outptr = (base64 << 4) & 255;
631 pos ++;
632 break;
633 case 2 :
634 if (outptr < outend)
635 *outptr++ |= (base64 >> 2) & 15;
636 if (outptr < outend)
637 *outptr = (base64 << 6) & 255;
638 pos ++;
639 break;
640 case 3 :
641 if (outptr < outend)
642 *outptr++ |= base64;
643 pos = 0;
644 break;
645 }
646 }
647
648 *outptr = '\0';
649
650 /*
651 * Return the decoded string and size...
652 */
653
654 *outlen = (int)(outptr - out);
655
656 return (out);
657 }
658
659
660 /*
661 * 'httpEncode64()' - Base64-encode a string.
662 *
663 * This function is deprecated. Use the httpEncode64_2() function instead
664 * which provides buffer length arguments.
665 *
666 * @deprecated@
667 */
668
669 char * /* O - Encoded string */
670 httpEncode64(char *out, /* I - String to write to */
671 const char *in) /* I - String to read from */
672 {
673 return (httpEncode64_2(out, 512, in, (int)strlen(in)));
674 }
675
676
677 /*
678 * 'httpEncode64_2()' - Base64-encode a string.
679 *
680 * @since CUPS 1.1.21/OS X 10.4@
681 */
682
683 char * /* O - Encoded string */
684 httpEncode64_2(char *out, /* I - String to write to */
685 int outlen, /* I - Size of output string */
686 const char *in, /* I - String to read from */
687 int inlen) /* I - Size of input string */
688 {
689 char *outptr, /* Output pointer */
690 *outend; /* End of output buffer */
691 static const char base64[] = /* Base64 characters... */
692 {
693 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
694 "abcdefghijklmnopqrstuvwxyz"
695 "0123456789"
696 "+/"
697 };
698
699
700 /*
701 * Range check input...
702 */
703
704 if (!out || outlen < 1 || !in)
705 return (NULL);
706
707 /*
708 * Convert bytes to base-64...
709 */
710
711 for (outptr = out, outend = out + outlen - 1; inlen > 0; in ++, inlen --)
712 {
713 /*
714 * Encode the up to 3 characters as 4 Base64 numbers...
715 */
716
717 if (outptr < outend)
718 *outptr ++ = base64[(in[0] & 255) >> 2];
719
720 if (outptr < outend)
721 {
722 if (inlen > 1)
723 *outptr ++ = base64[(((in[0] & 255) << 4) | ((in[1] & 255) >> 4)) & 63];
724 else
725 *outptr ++ = base64[((in[0] & 255) << 4) & 63];
726 }
727
728 in ++;
729 inlen --;
730 if (inlen <= 0)
731 {
732 if (outptr < outend)
733 *outptr ++ = '=';
734 if (outptr < outend)
735 *outptr ++ = '=';
736 break;
737 }
738
739 if (outptr < outend)
740 {
741 if (inlen > 1)
742 *outptr ++ = base64[(((in[0] & 255) << 2) | ((in[1] & 255) >> 6)) & 63];
743 else
744 *outptr ++ = base64[((in[0] & 255) << 2) & 63];
745 }
746
747 in ++;
748 inlen --;
749 if (inlen <= 0)
750 {
751 if (outptr < outend)
752 *outptr ++ = '=';
753 break;
754 }
755
756 if (outptr < outend)
757 *outptr ++ = base64[in[0] & 63];
758 }
759
760 *outptr = '\0';
761
762 /*
763 * Return the encoded string...
764 */
765
766 return (out);
767 }
768
769
770 /*
771 * 'httpGetDateString()' - Get a formatted date/time string from a time value.
772 *
773 * @deprecated@
774 */
775
776 const char * /* O - Date/time string */
777 httpGetDateString(time_t t) /* I - UNIX time */
778 {
779 _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */
780
781
782 return (httpGetDateString2(t, cg->http_date, sizeof(cg->http_date)));
783 }
784
785
786 /*
787 * 'httpGetDateString2()' - Get a formatted date/time string from a time value.
788 *
789 * @since CUPS 1.2/OS X 10.5@
790 */
791
792 const char * /* O - Date/time string */
793 httpGetDateString2(time_t t, /* I - UNIX time */
794 char *s, /* I - String buffer */
795 int slen) /* I - Size of string buffer */
796 {
797 struct tm *tdate; /* UNIX date/time data */
798
799
800 tdate = gmtime(&t);
801 if (tdate)
802 snprintf(s, slen, "%s, %02d %s %d %02d:%02d:%02d GMT",
803 http_days[tdate->tm_wday], tdate->tm_mday,
804 http_months[tdate->tm_mon], tdate->tm_year + 1900,
805 tdate->tm_hour, tdate->tm_min, tdate->tm_sec);
806 else
807 s[0] = '\0';
808
809 return (s);
810 }
811
812
813 /*
814 * 'httpGetDateTime()' - Get a time value from a formatted date/time string.
815 */
816
817 time_t /* O - UNIX time */
818 httpGetDateTime(const char *s) /* I - Date/time string */
819 {
820 int i; /* Looping var */
821 char mon[16]; /* Abbreviated month name */
822 int day, year; /* Day of month and year */
823 int hour, min, sec; /* Time */
824 int days; /* Number of days since 1970 */
825 static const int normal_days[] = /* Days to a month, normal years */
826 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 };
827 static const int leap_days[] = /* Days to a month, leap years */
828 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 };
829
830
831 DEBUG_printf(("2httpGetDateTime(s=\"%s\")", s));
832
833 /*
834 * Extract the date and time from the formatted string...
835 */
836
837 if (sscanf(s, "%*s%d%15s%d%d:%d:%d", &day, mon, &year, &hour, &min, &sec) < 6)
838 return (0);
839
840 DEBUG_printf(("4httpGetDateTime: day=%d, mon=\"%s\", year=%d, hour=%d, "
841 "min=%d, sec=%d", day, mon, year, hour, min, sec));
842
843 /*
844 * Convert the month name to a number from 0 to 11.
845 */
846
847 for (i = 0; i < 12; i ++)
848 if (!_cups_strcasecmp(mon, http_months[i]))
849 break;
850
851 if (i >= 12)
852 return (0);
853
854 DEBUG_printf(("4httpGetDateTime: i=%d", i));
855
856 /*
857 * Now convert the date and time to a UNIX time value in seconds since
858 * 1970. We can't use mktime() since the timezone may not be UTC but
859 * the date/time string *is* UTC.
860 */
861
862 if ((year & 3) == 0 && ((year % 100) != 0 || (year % 400) == 0))
863 days = leap_days[i] + day - 1;
864 else
865 days = normal_days[i] + day - 1;
866
867 DEBUG_printf(("4httpGetDateTime: days=%d", days));
868
869 days += (year - 1970) * 365 + /* 365 days per year (normally) */
870 ((year - 1) / 4 - 492) - /* + leap days */
871 ((year - 1) / 100 - 19) + /* - 100 year days */
872 ((year - 1) / 400 - 4); /* + 400 year days */
873
874 DEBUG_printf(("4httpGetDateTime: days=%d\n", days));
875
876 return (days * 86400 + hour * 3600 + min * 60 + sec);
877 }
878
879
880 /*
881 * 'httpSeparate()' - Separate a Universal Resource Identifier into its
882 * components.
883 *
884 * This function is deprecated; use the httpSeparateURI() function instead.
885 *
886 * @deprecated@
887 */
888
889 void
890 httpSeparate(const char *uri, /* I - Universal Resource Identifier */
891 char *scheme, /* O - Scheme [32] (http, https, etc.) */
892 char *username, /* O - Username [1024] */
893 char *host, /* O - Hostname [1024] */
894 int *port, /* O - Port number to use */
895 char *resource) /* O - Resource/filename [1024] */
896 {
897 httpSeparateURI(HTTP_URI_CODING_ALL, uri, scheme, 32, username,
898 HTTP_MAX_URI, host, HTTP_MAX_URI, port, resource,
899 HTTP_MAX_URI);
900 }
901
902
903 /*
904 * 'httpSeparate2()' - Separate a Universal Resource Identifier into its
905 * components.
906 *
907 * This function is deprecated; use the httpSeparateURI() function instead.
908 *
909 * @since CUPS 1.1.21/OS X 10.4@
910 * @deprecated@
911 */
912
913 void
914 httpSeparate2(const char *uri, /* I - Universal Resource Identifier */
915 char *scheme, /* O - Scheme (http, https, etc.) */
916 int schemelen, /* I - Size of scheme buffer */
917 char *username, /* O - Username */
918 int usernamelen, /* I - Size of username buffer */
919 char *host, /* O - Hostname */
920 int hostlen, /* I - Size of hostname buffer */
921 int *port, /* O - Port number to use */
922 char *resource, /* O - Resource/filename */
923 int resourcelen) /* I - Size of resource buffer */
924 {
925 httpSeparateURI(HTTP_URI_CODING_ALL, uri, scheme, schemelen, username,
926 usernamelen, host, hostlen, port, resource, resourcelen);
927 }
928
929
930 /*
931 * 'httpSeparateURI()' - Separate a Universal Resource Identifier into its
932 * components.
933 *
934 * @since CUPS 1.2/OS X 10.5@
935 */
936
937 http_uri_status_t /* O - Result of separation */
938 httpSeparateURI(
939 http_uri_coding_t decoding, /* I - Decoding flags */
940 const char *uri, /* I - Universal Resource Identifier */
941 char *scheme, /* O - Scheme (http, https, etc.) */
942 int schemelen, /* I - Size of scheme buffer */
943 char *username, /* O - Username */
944 int usernamelen, /* I - Size of username buffer */
945 char *host, /* O - Hostname */
946 int hostlen, /* I - Size of hostname buffer */
947 int *port, /* O - Port number to use */
948 char *resource, /* O - Resource/filename */
949 int resourcelen) /* I - Size of resource buffer */
950 {
951 char *ptr, /* Pointer into string... */
952 *end; /* End of string */
953 const char *sep; /* Separator character */
954 http_uri_status_t status; /* Result of separation */
955
956
957 /*
958 * Initialize everything to blank...
959 */
960
961 if (scheme && schemelen > 0)
962 *scheme = '\0';
963
964 if (username && usernamelen > 0)
965 *username = '\0';
966
967 if (host && hostlen > 0)
968 *host = '\0';
969
970 if (port)
971 *port = 0;
972
973 if (resource && resourcelen > 0)
974 *resource = '\0';
975
976 /*
977 * Range check input...
978 */
979
980 if (!uri || !port || !scheme || schemelen <= 0 || !username ||
981 usernamelen <= 0 || !host || hostlen <= 0 || !resource ||
982 resourcelen <= 0)
983 return (HTTP_URI_STATUS_BAD_ARGUMENTS);
984
985 if (!*uri)
986 return (HTTP_URI_STATUS_BAD_URI);
987
988 /*
989 * Grab the scheme portion of the URI...
990 */
991
992 status = HTTP_URI_STATUS_OK;
993
994 if (!strncmp(uri, "//", 2))
995 {
996 /*
997 * Workaround for HP IPP client bug...
998 */
999
1000 strlcpy(scheme, "ipp", schemelen);
1001 status = HTTP_URI_STATUS_MISSING_SCHEME;
1002 }
1003 else if (*uri == '/')
1004 {
1005 /*
1006 * Filename...
1007 */
1008
1009 strlcpy(scheme, "file", schemelen);
1010 status = HTTP_URI_STATUS_MISSING_SCHEME;
1011 }
1012 else
1013 {
1014 /*
1015 * Standard URI with scheme...
1016 */
1017
1018 for (ptr = scheme, end = scheme + schemelen - 1;
1019 *uri && *uri != ':' && ptr < end;)
1020 if (strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1021 "abcdefghijklmnopqrstuvwxyz"
1022 "0123456789-+.", *uri) != NULL)
1023 *ptr++ = *uri++;
1024 else
1025 break;
1026
1027 *ptr = '\0';
1028
1029 if (*uri != ':')
1030 {
1031 *scheme = '\0';
1032 return (HTTP_URI_STATUS_BAD_SCHEME);
1033 }
1034
1035 uri ++;
1036 }
1037
1038 /*
1039 * Set the default port number...
1040 */
1041
1042 if (!strcmp(scheme, "http"))
1043 *port = 80;
1044 else if (!strcmp(scheme, "https"))
1045 *port = 443;
1046 else if (!strcmp(scheme, "ipp") || !strcmp(scheme, "ipps"))
1047 *port = 631;
1048 else if (!_cups_strcasecmp(scheme, "lpd"))
1049 *port = 515;
1050 else if (!strcmp(scheme, "socket")) /* Not yet registered with IANA... */
1051 *port = 9100;
1052 else if (strcmp(scheme, "file") && strcmp(scheme, "mailto"))
1053 status = HTTP_URI_STATUS_UNKNOWN_SCHEME;
1054
1055 /*
1056 * Now see if we have a hostname...
1057 */
1058
1059 if (!strncmp(uri, "//", 2))
1060 {
1061 /*
1062 * Yes, extract it...
1063 */
1064
1065 uri += 2;
1066
1067 /*
1068 * Grab the username, if any...
1069 */
1070
1071 if ((sep = strpbrk(uri, "@/")) != NULL && *sep == '@')
1072 {
1073 /*
1074 * Get a username:password combo...
1075 */
1076
1077 uri = http_copy_decode(username, uri, usernamelen, "@",
1078 decoding & HTTP_URI_CODING_USERNAME);
1079
1080 if (!uri)
1081 {
1082 *username = '\0';
1083 return (HTTP_URI_STATUS_BAD_USERNAME);
1084 }
1085
1086 uri ++;
1087 }
1088
1089 /*
1090 * Then the hostname/IP address...
1091 */
1092
1093 if (*uri == '[')
1094 {
1095 /*
1096 * Grab IPv6 address...
1097 */
1098
1099 uri ++;
1100 if (!strncmp(uri, "v1.", 3))
1101 uri += 3; /* Skip IPvN leader... */
1102
1103 uri = http_copy_decode(host, uri, hostlen, "]",
1104 decoding & HTTP_URI_CODING_HOSTNAME);
1105
1106 if (!uri)
1107 {
1108 *host = '\0';
1109 return (HTTP_URI_STATUS_BAD_HOSTNAME);
1110 }
1111
1112 /*
1113 * Validate value...
1114 */
1115
1116 if (*uri != ']')
1117 {
1118 *host = '\0';
1119 return (HTTP_URI_STATUS_BAD_HOSTNAME);
1120 }
1121
1122 uri ++;
1123
1124 for (ptr = host; *ptr; ptr ++)
1125 if (*ptr == '+')
1126 {
1127 /*
1128 * Convert zone separator to % and stop here...
1129 */
1130
1131 *ptr = '%';
1132 break;
1133 }
1134 else if (*ptr != ':' && *ptr != '.' && !isxdigit(*ptr & 255))
1135 {
1136 *host = '\0';
1137 return (HTTP_URI_STATUS_BAD_HOSTNAME);
1138 }
1139 }
1140 else
1141 {
1142 /*
1143 * Validate the hostname or IPv4 address first...
1144 */
1145
1146 for (ptr = (char *)uri; *ptr; ptr ++)
1147 if (strchr(":?/", *ptr))
1148 break;
1149 else if (!strchr("abcdefghijklmnopqrstuvwxyz"
1150 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1151 "0123456789"
1152 "-._~"
1153 "%"
1154 "!$&'()*+,;=\\", *ptr))
1155 {
1156 *host = '\0';
1157 return (HTTP_URI_STATUS_BAD_HOSTNAME);
1158 }
1159
1160 /*
1161 * Then copy the hostname or IPv4 address to the buffer...
1162 */
1163
1164 uri = http_copy_decode(host, uri, hostlen, ":?/",
1165 decoding & HTTP_URI_CODING_HOSTNAME);
1166
1167 if (!uri)
1168 {
1169 *host = '\0';
1170 return (HTTP_URI_STATUS_BAD_HOSTNAME);
1171 }
1172 }
1173
1174 /*
1175 * Validate hostname for file scheme - only empty and localhost are
1176 * acceptable.
1177 */
1178
1179 if (!strcmp(scheme, "file") && strcmp(host, "localhost") && host[0])
1180 {
1181 *host = '\0';
1182 return (HTTP_URI_STATUS_BAD_HOSTNAME);
1183 }
1184
1185 /*
1186 * See if we have a port number...
1187 */
1188
1189 if (*uri == ':')
1190 {
1191 /*
1192 * Yes, collect the port number...
1193 */
1194
1195 if (!isdigit(uri[1] & 255))
1196 {
1197 *port = 0;
1198 return (HTTP_URI_STATUS_BAD_PORT);
1199 }
1200
1201 *port = strtol(uri + 1, (char **)&uri, 10);
1202
1203 if (*uri != '/' && *uri)
1204 {
1205 *port = 0;
1206 return (HTTP_URI_STATUS_BAD_PORT);
1207 }
1208 }
1209 }
1210
1211 /*
1212 * The remaining portion is the resource string...
1213 */
1214
1215 if (*uri == '?' || !*uri)
1216 {
1217 /*
1218 * Hostname but no path...
1219 */
1220
1221 status = HTTP_URI_STATUS_MISSING_RESOURCE;
1222 *resource = '/';
1223
1224 /*
1225 * Copy any query string...
1226 */
1227
1228 if (*uri == '?')
1229 uri = http_copy_decode(resource + 1, uri, resourcelen - 1, NULL,
1230 decoding & HTTP_URI_CODING_QUERY);
1231 else
1232 resource[1] = '\0';
1233 }
1234 else
1235 {
1236 uri = http_copy_decode(resource, uri, resourcelen, "?",
1237 decoding & HTTP_URI_CODING_RESOURCE);
1238
1239 if (uri && *uri == '?')
1240 {
1241 /*
1242 * Concatenate any query string...
1243 */
1244
1245 char *resptr = resource + strlen(resource);
1246
1247 uri = http_copy_decode(resptr, uri, resourcelen - (int)(resptr - resource),
1248 NULL, decoding & HTTP_URI_CODING_QUERY);
1249 }
1250 }
1251
1252 if (!uri)
1253 {
1254 *resource = '\0';
1255 return (HTTP_URI_STATUS_BAD_RESOURCE);
1256 }
1257
1258 /*
1259 * Return the URI separation status...
1260 */
1261
1262 return (status);
1263 }
1264
1265
1266 /*
1267 * 'httpStatus()' - Return a short string describing a HTTP status code.
1268 *
1269 * The returned string is localized to the current POSIX locale and is based
1270 * on the status strings defined in RFC 2616.
1271 */
1272
1273 const char * /* O - Localized status string */
1274 httpStatus(http_status_t status) /* I - HTTP status code */
1275 {
1276 const char *s; /* Status string */
1277 _cups_globals_t *cg = _cupsGlobals(); /* Global data */
1278
1279
1280 if (!cg->lang_default)
1281 cg->lang_default = cupsLangDefault();
1282
1283 switch (status)
1284 {
1285 case HTTP_STATUS_CONTINUE :
1286 s = _("Continue");
1287 break;
1288 case HTTP_STATUS_SWITCHING_PROTOCOLS :
1289 s = _("Switching Protocols");
1290 break;
1291 case HTTP_STATUS_OK :
1292 s = _("OK");
1293 break;
1294 case HTTP_STATUS_CREATED :
1295 s = _("Created");
1296 break;
1297 case HTTP_STATUS_ACCEPTED :
1298 s = _("Accepted");
1299 break;
1300 case HTTP_STATUS_NO_CONTENT :
1301 s = _("No Content");
1302 break;
1303 case HTTP_STATUS_MOVED_PERMANENTLY :
1304 s = _("Moved Permanently");
1305 break;
1306 case HTTP_STATUS_SEE_OTHER :
1307 s = _("See Other");
1308 break;
1309 case HTTP_STATUS_NOT_MODIFIED :
1310 s = _("Not Modified");
1311 break;
1312 case HTTP_STATUS_BAD_REQUEST :
1313 s = _("Bad Request");
1314 break;
1315 case HTTP_STATUS_UNAUTHORIZED :
1316 case HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED :
1317 s = _("Unauthorized");
1318 break;
1319 case HTTP_STATUS_FORBIDDEN :
1320 s = _("Forbidden");
1321 break;
1322 case HTTP_STATUS_NOT_FOUND :
1323 s = _("Not Found");
1324 break;
1325 case HTTP_STATUS_REQUEST_TOO_LARGE :
1326 s = _("Request Entity Too Large");
1327 break;
1328 case HTTP_STATUS_URI_TOO_LONG :
1329 s = _("URI Too Long");
1330 break;
1331 case HTTP_STATUS_UPGRADE_REQUIRED :
1332 s = _("Upgrade Required");
1333 break;
1334 case HTTP_STATUS_NOT_IMPLEMENTED :
1335 s = _("Not Implemented");
1336 break;
1337 case HTTP_STATUS_NOT_SUPPORTED :
1338 s = _("Not Supported");
1339 break;
1340 case HTTP_STATUS_EXPECTATION_FAILED :
1341 s = _("Expectation Failed");
1342 break;
1343 case HTTP_STATUS_SERVICE_UNAVAILABLE :
1344 s = _("Service Unavailable");
1345 break;
1346 case HTTP_STATUS_SERVER_ERROR :
1347 s = _("Internal Server Error");
1348 break;
1349 case HTTP_STATUS_CUPS_PKI_ERROR :
1350 s = _("SSL/TLS Negotiation Error");
1351 break;
1352 case HTTP_STATUS_CUPS_WEBIF_DISABLED :
1353 s = _("Web Interface is Disabled");
1354 break;
1355
1356 default :
1357 s = _("Unknown");
1358 break;
1359 }
1360
1361 return (_cupsLangString(cg->lang_default, s));
1362 }
1363
1364
1365 #ifndef HAVE_HSTRERROR
1366 /*
1367 * '_cups_hstrerror()' - hstrerror() emulation function for Solaris and others.
1368 */
1369
1370 const char * /* O - Error string */
1371 _cups_hstrerror(int error) /* I - Error number */
1372 {
1373 static const char * const errors[] = /* Error strings */
1374 {
1375 "OK",
1376 "Host not found.",
1377 "Try again.",
1378 "Unrecoverable lookup error.",
1379 "No data associated with name."
1380 };
1381
1382
1383 if (error < 0 || error > 4)
1384 return ("Unknown hostname lookup error.");
1385 else
1386 return (errors[error]);
1387 }
1388 #endif /* !HAVE_HSTRERROR */
1389
1390
1391 /*
1392 * '_httpDecodeURI()' - Percent-decode a HTTP request URI.
1393 */
1394
1395 char * /* O - Decoded URI or NULL on error */
1396 _httpDecodeURI(char *dst, /* I - Destination buffer */
1397 const char *src, /* I - Source URI */
1398 size_t dstsize) /* I - Size of destination buffer */
1399 {
1400 if (http_copy_decode(dst, src, (int)dstsize, NULL, 1))
1401 return (dst);
1402 else
1403 return (NULL);
1404 }
1405
1406
1407 /*
1408 * '_httpEncodeURI()' - Percent-encode a HTTP request URI.
1409 */
1410
1411 char * /* O - Encoded URI */
1412 _httpEncodeURI(char *dst, /* I - Destination buffer */
1413 const char *src, /* I - Source URI */
1414 size_t dstsize) /* I - Size of destination buffer */
1415 {
1416 http_copy_encode(dst, src, dst + dstsize - 1, NULL, NULL, 1);
1417 return (dst);
1418 }
1419
1420
1421 /*
1422 * '_httpResolveURI()' - Resolve a DNS-SD URI.
1423 */
1424
1425 const char * /* O - Resolved URI */
1426 _httpResolveURI(
1427 const char *uri, /* I - DNS-SD URI */
1428 char *resolved_uri, /* I - Buffer for resolved URI */
1429 size_t resolved_size, /* I - Size of URI buffer */
1430 int options, /* I - Resolve options */
1431 int (*cb)(void *context), /* I - Continue callback function */
1432 void *context) /* I - Context pointer for callback */
1433 {
1434 char scheme[32], /* URI components... */
1435 userpass[256],
1436 hostname[1024],
1437 resource[1024];
1438 int port;
1439 #ifdef DEBUG
1440 http_uri_status_t status; /* URI decode status */
1441 #endif /* DEBUG */
1442
1443
1444 DEBUG_printf(("4_httpResolveURI(uri=\"%s\", resolved_uri=%p, "
1445 "resolved_size=" CUPS_LLFMT ")", uri, resolved_uri,
1446 CUPS_LLCAST resolved_size));
1447
1448 /*
1449 * Get the device URI...
1450 */
1451
1452 #ifdef DEBUG
1453 if ((status = httpSeparateURI(HTTP_URI_CODING_ALL, uri, scheme,
1454 sizeof(scheme), userpass, sizeof(userpass),
1455 hostname, sizeof(hostname), &port, resource,
1456 sizeof(resource))) < HTTP_URI_STATUS_OK)
1457 #else
1458 if (httpSeparateURI(HTTP_URI_CODING_ALL, uri, scheme,
1459 sizeof(scheme), userpass, sizeof(userpass),
1460 hostname, sizeof(hostname), &port, resource,
1461 sizeof(resource)) < HTTP_URI_STATUS_OK)
1462 #endif /* DEBUG */
1463 {
1464 if (options & _HTTP_RESOLVE_STDERR)
1465 _cupsLangPrintFilter(stderr, "ERROR", _("Bad device-uri \"%s\"."), uri);
1466
1467 DEBUG_printf(("6_httpResolveURI: httpSeparateURI returned %d!", status));
1468 DEBUG_puts("5_httpResolveURI: Returning NULL");
1469 return (NULL);
1470 }
1471
1472 /*
1473 * Resolve it as needed...
1474 */
1475
1476 if (strstr(hostname, "._tcp"))
1477 {
1478 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
1479 char *regtype, /* Pointer to type in hostname */
1480 *domain; /* Pointer to domain in hostname */
1481 _http_uribuf_t uribuf; /* URI buffer */
1482 int offline = 0; /* offline-report state set? */
1483 # ifdef HAVE_DNSSD
1484 # ifdef WIN32
1485 # pragma comment(lib, "dnssd.lib")
1486 # endif /* WIN32 */
1487 DNSServiceRef ref, /* DNS-SD master service reference */
1488 domainref, /* DNS-SD service reference for domain */
1489 localref; /* DNS-SD service reference for .local */
1490 int domainsent = 0; /* Send the domain resolve? */
1491 # ifdef HAVE_POLL
1492 struct pollfd polldata; /* Polling data */
1493 # else /* select() */
1494 fd_set input_set; /* Input set for select() */
1495 struct timeval stimeout; /* Timeout value for select() */
1496 # endif /* HAVE_POLL */
1497 # elif defined(HAVE_AVAHI)
1498 AvahiClient *client; /* Client information */
1499 int error; /* Status */
1500 # endif /* HAVE_DNSSD */
1501
1502 if (options & _HTTP_RESOLVE_STDERR)
1503 fprintf(stderr, "DEBUG: Resolving \"%s\"...\n", hostname);
1504
1505 /*
1506 * Separate the hostname into service name, registration type, and domain...
1507 */
1508
1509 for (regtype = strstr(hostname, "._tcp") - 2;
1510 regtype > hostname;
1511 regtype --)
1512 if (regtype[0] == '.' && regtype[1] == '_')
1513 {
1514 /*
1515 * Found ._servicetype in front of ._tcp...
1516 */
1517
1518 *regtype++ = '\0';
1519 break;
1520 }
1521
1522 if (regtype <= hostname)
1523 {
1524 DEBUG_puts("5_httpResolveURI: Bad hostname, returning NULL");
1525 return (NULL);
1526 }
1527
1528 for (domain = strchr(regtype, '.');
1529 domain;
1530 domain = strchr(domain + 1, '.'))
1531 if (domain[1] != '_')
1532 break;
1533
1534 if (domain)
1535 *domain++ = '\0';
1536
1537 uribuf.buffer = resolved_uri;
1538 uribuf.bufsize = resolved_size;
1539 uribuf.options = options;
1540 uribuf.resource = resource;
1541
1542 resolved_uri[0] = '\0';
1543
1544 DEBUG_printf(("6_httpResolveURI: Resolving hostname=\"%s\", regtype=\"%s\", "
1545 "domain=\"%s\"\n", hostname, regtype, domain));
1546 if (options & _HTTP_RESOLVE_STDERR)
1547 {
1548 fputs("STATE: +connecting-to-device\n", stderr);
1549 fprintf(stderr, "DEBUG: Resolving \"%s\", regtype=\"%s\", "
1550 "domain=\"local.\"...\n", hostname, regtype);
1551 }
1552
1553 uri = NULL;
1554
1555 # ifdef HAVE_DNSSD
1556 if (DNSServiceCreateConnection(&ref) == kDNSServiceErr_NoError)
1557 {
1558 int myinterface = kDNSServiceInterfaceIndexAny;
1559 /* Lookup on any interface */
1560
1561 if (!strcmp(scheme, "ippusb"))
1562 myinterface = kDNSServiceInterfaceIndexLocalOnly;
1563
1564 localref = ref;
1565 if (DNSServiceResolve(&localref,
1566 kDNSServiceFlagsShareConnection, myinterface,
1567 hostname, regtype, "local.", http_resolve_cb,
1568 &uribuf) == kDNSServiceErr_NoError)
1569 {
1570 int fds; /* Number of ready descriptors */
1571 time_t timeout, /* Poll timeout */
1572 start_time = time(NULL),/* Start time */
1573 end_time = start_time + 90;
1574 /* End time */
1575
1576 while (time(NULL) < end_time)
1577 {
1578 if (options & _HTTP_RESOLVE_STDERR)
1579 _cupsLangPrintFilter(stderr, "INFO", _("Looking for printer."));
1580
1581 if (cb && !(*cb)(context))
1582 {
1583 DEBUG_puts("5_httpResolveURI: callback returned 0 (stop)");
1584 break;
1585 }
1586
1587 /*
1588 * Wakeup every 2 seconds to emit a "looking for printer" message...
1589 */
1590
1591 if ((timeout = end_time - time(NULL)) > 2)
1592 timeout = 2;
1593
1594 # ifdef HAVE_POLL
1595 polldata.fd = DNSServiceRefSockFD(ref);
1596 polldata.events = POLLIN;
1597
1598 fds = poll(&polldata, 1, 1000 * timeout);
1599
1600 # else /* select() */
1601 FD_ZERO(&input_set);
1602 FD_SET(DNSServiceRefSockFD(ref), &input_set);
1603
1604 # ifdef WIN32
1605 stimeout.tv_sec = (long)timeout;
1606 # else
1607 stimeout.tv_sec = timeout;
1608 # endif /* WIN32 */
1609 stimeout.tv_usec = 0;
1610
1611 fds = select(DNSServiceRefSockFD(ref)+1, &input_set, NULL, NULL,
1612 &stimeout);
1613 # endif /* HAVE_POLL */
1614
1615 if (fds < 0)
1616 {
1617 if (errno != EINTR && errno != EAGAIN)
1618 {
1619 DEBUG_printf(("5_httpResolveURI: poll error: %s", strerror(errno)));
1620 break;
1621 }
1622 }
1623 else if (fds == 0)
1624 {
1625 /*
1626 * Wait 2 seconds for a response to the local resolve; if nothing
1627 * comes in, do an additional domain resolution...
1628 */
1629
1630 if (domainsent == 0 && domain && _cups_strcasecmp(domain, "local."))
1631 {
1632 if (options & _HTTP_RESOLVE_STDERR)
1633 fprintf(stderr,
1634 "DEBUG: Resolving \"%s\", regtype=\"%s\", "
1635 "domain=\"%s\"...\n", hostname, regtype,
1636 domain ? domain : "");
1637
1638 domainref = ref;
1639 if (DNSServiceResolve(&domainref,
1640 kDNSServiceFlagsShareConnection,
1641 myinterface, hostname, regtype, domain,
1642 http_resolve_cb,
1643 &uribuf) == kDNSServiceErr_NoError)
1644 domainsent = 1;
1645 }
1646
1647 /*
1648 * If it hasn't resolved within 5 seconds set the offline-report
1649 * printer-state-reason...
1650 */
1651
1652 if ((options & _HTTP_RESOLVE_STDERR) && offline == 0 &&
1653 time(NULL) > (start_time + 5))
1654 {
1655 fputs("STATE: +offline-report\n", stderr);
1656 offline = 1;
1657 }
1658 }
1659 else
1660 {
1661 if (DNSServiceProcessResult(ref) == kDNSServiceErr_NoError)
1662 {
1663 uri = resolved_uri;
1664 break;
1665 }
1666 }
1667 }
1668
1669 if (domainsent)
1670 DNSServiceRefDeallocate(domainref);
1671
1672 DNSServiceRefDeallocate(localref);
1673 }
1674
1675 DNSServiceRefDeallocate(ref);
1676 }
1677 # else /* HAVE_AVAHI */
1678 if ((uribuf.poll = avahi_simple_poll_new()) != NULL)
1679 {
1680 avahi_simple_poll_set_func(uribuf.poll, http_poll_cb, NULL);
1681
1682 if ((client = avahi_client_new(avahi_simple_poll_get(uribuf.poll),
1683 0, http_client_cb,
1684 &uribuf, &error)) != NULL)
1685 {
1686 if (avahi_service_resolver_new(client, AVAHI_IF_UNSPEC,
1687 AVAHI_PROTO_UNSPEC, hostname,
1688 regtype, "local.", AVAHI_PROTO_UNSPEC, 0,
1689 http_resolve_cb, &uribuf) != NULL)
1690 {
1691 time_t start_time = time(NULL),
1692 /* Start time */
1693 end_time = start_time + 90;
1694 /* End time */
1695 int pstatus; /* Poll status */
1696
1697 pstatus = avahi_simple_poll_iterate(uribuf.poll, 2000);
1698
1699 if (pstatus == 0 && !resolved_uri[0] && domain &&
1700 _cups_strcasecmp(domain, "local."))
1701 {
1702 /*
1703 * Resolve for .local hasn't returned anything, try the listed
1704 * domain...
1705 */
1706
1707 avahi_service_resolver_new(client, AVAHI_IF_UNSPEC,
1708 AVAHI_PROTO_UNSPEC, hostname,
1709 regtype, domain, AVAHI_PROTO_UNSPEC, 0,
1710 http_resolve_cb, &uribuf);
1711 }
1712
1713 while (!pstatus && !resolved_uri[0] && time(NULL) < end_time)
1714 {
1715 if ((pstatus = avahi_simple_poll_iterate(uribuf.poll, 2000)) != 0)
1716 break;
1717
1718 /*
1719 * If it hasn't resolved within 5 seconds set the offline-report
1720 * printer-state-reason...
1721 */
1722
1723 if ((options & _HTTP_RESOLVE_STDERR) && offline == 0 &&
1724 time(NULL) > (start_time + 5))
1725 {
1726 fputs("STATE: +offline-report\n", stderr);
1727 offline = 1;
1728 }
1729 }
1730
1731 /*
1732 * Collect the result (if we got one).
1733 */
1734
1735 if (resolved_uri[0])
1736 uri = resolved_uri;
1737 }
1738
1739 avahi_client_free(client);
1740 }
1741
1742 avahi_simple_poll_free(uribuf.poll);
1743 }
1744 # endif /* HAVE_DNSSD */
1745
1746 if (options & _HTTP_RESOLVE_STDERR)
1747 {
1748 if (uri)
1749 {
1750 fprintf(stderr, "DEBUG: Resolved as \"%s\"...\n", uri);
1751 fputs("STATE: -connecting-to-device,offline-report\n", stderr);
1752 }
1753 else
1754 {
1755 fputs("DEBUG: Unable to resolve URI\n", stderr);
1756 fputs("STATE: -connecting-to-device\n", stderr);
1757 }
1758 }
1759
1760 #else /* HAVE_DNSSD || HAVE_AVAHI */
1761 /*
1762 * No DNS-SD support...
1763 */
1764
1765 uri = NULL;
1766 #endif /* HAVE_DNSSD || HAVE_AVAHI */
1767
1768 if ((options & _HTTP_RESOLVE_STDERR) && !uri)
1769 _cupsLangPrintFilter(stderr, "INFO", _("Unable to find printer."));
1770 }
1771 else
1772 {
1773 /*
1774 * Nothing more to do...
1775 */
1776
1777 strlcpy(resolved_uri, uri, resolved_size);
1778 uri = resolved_uri;
1779 }
1780
1781 DEBUG_printf(("5_httpResolveURI: Returning \"%s\"", uri));
1782
1783 return (uri);
1784 }
1785
1786
1787 #ifdef HAVE_AVAHI
1788 /*
1789 * 'http_client_cb()' - Client callback for resolving URI.
1790 */
1791
1792 static void
1793 http_client_cb(
1794 AvahiClient *client, /* I - Client information */
1795 AvahiClientState state, /* I - Current state */
1796 void *context) /* I - Pointer to URI buffer */
1797 {
1798 DEBUG_printf(("7http_client_cb(client=%p, state=%d, context=%p)", client,
1799 state, context));
1800
1801 /*
1802 * If the connection drops, quit.
1803 */
1804
1805 if (state == AVAHI_CLIENT_FAILURE)
1806 {
1807 _http_uribuf_t *uribuf = (_http_uribuf_t *)context;
1808 /* URI buffer */
1809
1810 avahi_simple_poll_quit(uribuf->poll);
1811 }
1812 }
1813 #endif /* HAVE_AVAHI */
1814
1815
1816 /*
1817 * 'http_copy_decode()' - Copy and decode a URI.
1818 */
1819
1820 static const char * /* O - New source pointer or NULL on error */
1821 http_copy_decode(char *dst, /* O - Destination buffer */
1822 const char *src, /* I - Source pointer */
1823 int dstsize, /* I - Destination size */
1824 const char *term, /* I - Terminating characters */
1825 int decode) /* I - Decode %-encoded values */
1826 {
1827 char *ptr, /* Pointer into buffer */
1828 *end; /* End of buffer */
1829 int quoted; /* Quoted character */
1830
1831
1832 /*
1833 * Copy the src to the destination until we hit a terminating character
1834 * or the end of the string.
1835 */
1836
1837 for (ptr = dst, end = dst + dstsize - 1;
1838 *src && (!term || !strchr(term, *src));
1839 src ++)
1840 if (ptr < end)
1841 {
1842 if (*src == '%' && decode)
1843 {
1844 if (isxdigit(src[1] & 255) && isxdigit(src[2] & 255))
1845 {
1846 /*
1847 * Grab a hex-encoded character...
1848 */
1849
1850 src ++;
1851 if (isalpha(*src))
1852 quoted = (tolower(*src) - 'a' + 10) << 4;
1853 else
1854 quoted = (*src - '0') << 4;
1855
1856 src ++;
1857 if (isalpha(*src))
1858 quoted |= tolower(*src) - 'a' + 10;
1859 else
1860 quoted |= *src - '0';
1861
1862 *ptr++ = quoted;
1863 }
1864 else
1865 {
1866 /*
1867 * Bad hex-encoded character...
1868 */
1869
1870 *ptr = '\0';
1871 return (NULL);
1872 }
1873 }
1874 else if ((*src & 255) <= 0x20 || (*src & 255) >= 0x7f)
1875 {
1876 *ptr = '\0';
1877 return (NULL);
1878 }
1879 else
1880 *ptr++ = *src;
1881 }
1882
1883 *ptr = '\0';
1884
1885 return (src);
1886 }
1887
1888
1889 /*
1890 * 'http_copy_encode()' - Copy and encode a URI.
1891 */
1892
1893 static char * /* O - End of current URI */
1894 http_copy_encode(char *dst, /* O - Destination buffer */
1895 const char *src, /* I - Source pointer */
1896 char *dstend, /* I - End of destination buffer */
1897 const char *reserved, /* I - Extra reserved characters */
1898 const char *term, /* I - Terminating characters */
1899 int encode) /* I - %-encode reserved chars? */
1900 {
1901 static const char hex[] = "0123456789ABCDEF";
1902
1903
1904 while (*src && dst < dstend)
1905 {
1906 if (term && *src == *term)
1907 return (dst);
1908
1909 if (encode && (*src == '%' || *src <= ' ' || *src & 128 ||
1910 (reserved && strchr(reserved, *src))))
1911 {
1912 /*
1913 * Hex encode reserved characters...
1914 */
1915
1916 if ((dst + 2) >= dstend)
1917 break;
1918
1919 *dst++ = '%';
1920 *dst++ = hex[(*src >> 4) & 15];
1921 *dst++ = hex[*src & 15];
1922
1923 src ++;
1924 }
1925 else
1926 *dst++ = *src++;
1927 }
1928
1929 *dst = '\0';
1930
1931 if (*src)
1932 return (NULL);
1933 else
1934 return (dst);
1935 }
1936
1937
1938 #ifdef HAVE_DNSSD
1939 /*
1940 * 'http_resolve_cb()' - Build a device URI for the given service name.
1941 */
1942
1943 static void DNSSD_API
1944 http_resolve_cb(
1945 DNSServiceRef sdRef, /* I - Service reference */
1946 DNSServiceFlags flags, /* I - Results flags */
1947 uint32_t interfaceIndex, /* I - Interface number */
1948 DNSServiceErrorType errorCode, /* I - Error, if any */
1949 const char *fullName, /* I - Full service name */
1950 const char *hostTarget, /* I - Hostname */
1951 uint16_t port, /* I - Port number */
1952 uint16_t txtLen, /* I - Length of TXT record */
1953 const unsigned char *txtRecord, /* I - TXT record data */
1954 void *context) /* I - Pointer to URI buffer */
1955 {
1956 _http_uribuf_t *uribuf = (_http_uribuf_t *)context;
1957 /* URI buffer */
1958 const char *scheme, /* URI scheme */
1959 *hostptr, /* Pointer into hostTarget */
1960 *reskey, /* "rp" or "rfo" */
1961 *resdefault; /* Default path */
1962 char resource[257], /* Remote path */
1963 fqdn[256]; /* FQDN of the .local name */
1964 const void *value; /* Value from TXT record */
1965 uint8_t valueLen; /* Length of value */
1966
1967
1968 DEBUG_printf(("7http_resolve_cb(sdRef=%p, flags=%x, interfaceIndex=%u, "
1969 "errorCode=%d, fullName=\"%s\", hostTarget=\"%s\", port=%u, "
1970 "txtLen=%u, txtRecord=%p, context=%p)", sdRef, flags,
1971 interfaceIndex, errorCode, fullName, hostTarget, port, txtLen,
1972 txtRecord, context));
1973
1974 /*
1975 * Figure out the scheme from the full name...
1976 */
1977
1978 if (strstr(fullName, "._ipps") || strstr(fullName, "._ipp-tls"))
1979 scheme = "ipps";
1980 else if (strstr(fullName, "._ipp") || strstr(fullName, "._fax-ipp"))
1981 scheme = "ipp";
1982 else if (strstr(fullName, "._http."))
1983 scheme = "http";
1984 else if (strstr(fullName, "._https."))
1985 scheme = "https";
1986 else if (strstr(fullName, "._printer."))
1987 scheme = "lpd";
1988 else if (strstr(fullName, "._pdl-datastream."))
1989 scheme = "socket";
1990 else
1991 scheme = "riousbprint";
1992
1993 /*
1994 * Extract the "remote printer" key from the TXT record...
1995 */
1996
1997 if ((uribuf->options & _HTTP_RESOLVE_FAXOUT) &&
1998 (!strcmp(scheme, "ipp") || !strcmp(scheme, "ipps")))
1999 {
2000 reskey = "rfo";
2001 resdefault = "/ipp/faxout";
2002 }
2003 else
2004 {
2005 reskey = "rp";
2006 resdefault = "/";
2007 }
2008
2009 if ((value = TXTRecordGetValuePtr(txtLen, txtRecord, reskey,
2010 &valueLen)) != NULL)
2011 {
2012 if (((char *)value)[0] == '/')
2013 {
2014 /*
2015 * Value (incorrectly) has a leading slash already...
2016 */
2017
2018 memcpy(resource, value, valueLen);
2019 resource[valueLen] = '\0';
2020 }
2021 else
2022 {
2023 /*
2024 * Convert to resource by concatenating with a leading "/"...
2025 */
2026
2027 resource[0] = '/';
2028 memcpy(resource + 1, value, valueLen);
2029 resource[valueLen + 1] = '\0';
2030 }
2031 }
2032 else
2033 {
2034 /*
2035 * Use the default value...
2036 */
2037
2038 strlcpy(resource, resdefault, sizeof(resource));
2039 }
2040
2041 /*
2042 * Lookup the FQDN if needed...
2043 */
2044
2045 if ((uribuf->options & _HTTP_RESOLVE_FQDN) &&
2046 (hostptr = hostTarget + strlen(hostTarget) - 7) > hostTarget &&
2047 !_cups_strcasecmp(hostptr, ".local."))
2048 {
2049 /*
2050 * OK, we got a .local name but the caller needs a real domain. Start by
2051 * getting the IP address of the .local name and then do reverse-lookups...
2052 */
2053
2054 http_addrlist_t *addrlist, /* List of addresses */
2055 *addr; /* Current address */
2056
2057 DEBUG_printf(("8http_resolve_cb: Looking up \"%s\".", hostTarget));
2058
2059 snprintf(fqdn, sizeof(fqdn), "%d", ntohs(port));
2060 if ((addrlist = httpAddrGetList(hostTarget, AF_UNSPEC, fqdn)) != NULL)
2061 {
2062 for (addr = addrlist; addr; addr = addr->next)
2063 {
2064 int error = getnameinfo(&(addr->addr.addr),
2065 httpAddrLength(&(addr->addr)),
2066 fqdn, sizeof(fqdn), NULL, 0, NI_NAMEREQD);
2067
2068 if (!error)
2069 {
2070 DEBUG_printf(("8http_resolve_cb: Found \"%s\".", fqdn));
2071
2072 if ((hostptr = fqdn + strlen(fqdn) - 6) <= fqdn ||
2073 _cups_strcasecmp(hostptr, ".local"))
2074 {
2075 hostTarget = fqdn;
2076 break;
2077 }
2078 }
2079 #ifdef DEBUG
2080 else
2081 DEBUG_printf(("8http_resolve_cb: \"%s\" did not resolve: %d",
2082 httpAddrString(&(addr->addr), fqdn, sizeof(fqdn)),
2083 error));
2084 #endif /* DEBUG */
2085 }
2086
2087 httpAddrFreeList(addrlist);
2088 }
2089 }
2090
2091 /*
2092 * Assemble the final device URI...
2093 */
2094
2095 if ((!strcmp(scheme, "ipp") || !strcmp(scheme, "ipps")) &&
2096 !strcmp(uribuf->resource, "/cups"))
2097 httpAssembleURIf(HTTP_URI_CODING_ALL, uribuf->buffer, uribuf->bufsize,
2098 scheme, NULL, hostTarget, ntohs(port), "%s?snmp=false",
2099 resource);
2100 else
2101 httpAssembleURI(HTTP_URI_CODING_ALL, uribuf->buffer, uribuf->bufsize,
2102 scheme, NULL, hostTarget, ntohs(port), resource);
2103
2104 DEBUG_printf(("8http_resolve_cb: Resolved URI is \"%s\"...", uribuf->buffer));
2105 }
2106
2107 #elif defined(HAVE_AVAHI)
2108 /*
2109 * 'http_poll_cb()' - Wait for input on the specified file descriptors.
2110 *
2111 * Note: This function is needed because avahi_simple_poll_iterate is broken
2112 * and always uses a timeout of 0 (!) milliseconds.
2113 * (Avahi Ticket #364)
2114 */
2115
2116 static int /* O - Number of file descriptors matching */
2117 http_poll_cb(
2118 struct pollfd *pollfds, /* I - File descriptors */
2119 unsigned int num_pollfds, /* I - Number of file descriptors */
2120 int timeout, /* I - Timeout in milliseconds (used) */
2121 void *context) /* I - User data (unused) */
2122 {
2123 (void)timeout;
2124 (void)context;
2125
2126 return (poll(pollfds, num_pollfds, 2000));
2127 }
2128
2129
2130 /*
2131 * 'http_resolve_cb()' - Build a device URI for the given service name.
2132 */
2133
2134 static void
2135 http_resolve_cb(
2136 AvahiServiceResolver *resolver, /* I - Resolver (unused) */
2137 AvahiIfIndex interface, /* I - Interface index (unused) */
2138 AvahiProtocol protocol, /* I - Network protocol (unused) */
2139 AvahiResolverEvent event, /* I - Event (found, etc.) */
2140 const char *name, /* I - Service name */
2141 const char *type, /* I - Registration type */
2142 const char *domain, /* I - Domain (unused) */
2143 const char *hostTarget, /* I - Hostname */
2144 const AvahiAddress *address, /* I - Address (unused) */
2145 uint16_t port, /* I - Port number */
2146 AvahiStringList *txt, /* I - TXT record */
2147 AvahiLookupResultFlags flags, /* I - Lookup flags (unused) */
2148 void *context) /* I - Pointer to URI buffer */
2149 {
2150 _http_uribuf_t *uribuf = (_http_uribuf_t *)context;
2151 /* URI buffer */
2152 const char *scheme, /* URI scheme */
2153 *hostptr, /* Pointer into hostTarget */
2154 *reskey, /* "rp" or "rfo" */
2155 *resdefault; /* Default path */
2156 char resource[257], /* Remote path */
2157 fqdn[256]; /* FQDN of the .local name */
2158 AvahiStringList *pair; /* Current TXT record key/value pair */
2159 char *value; /* Value for "rp" key */
2160 size_t valueLen = 0; /* Length of "rp" key */
2161
2162
2163 DEBUG_printf(("7http_resolve_cb(resolver=%p, "
2164 "interface=%d, protocol=%d, event=%d, name=\"%s\", "
2165 "type=\"%s\", domain=\"%s\", hostTarget=\"%s\", address=%p, "
2166 "port=%d, txt=%p, flags=%d, context=%p)",
2167 resolver, interface, protocol, event, name, type, domain,
2168 hostTarget, address, port, txt, flags, context));
2169
2170 if (event != AVAHI_RESOLVER_FOUND)
2171 {
2172 avahi_service_resolver_free(resolver);
2173 avahi_simple_poll_quit(uribuf->poll);
2174 return;
2175 }
2176
2177 /*
2178 * Figure out the scheme from the full name...
2179 */
2180
2181 if (strstr(type, "_ipp."))
2182 scheme = "ipp";
2183 else if (strstr(type, "_printer."))
2184 scheme = "lpd";
2185 else if (strstr(type, "_pdl-datastream."))
2186 scheme = "socket";
2187 else
2188 scheme = "riousbprint";
2189
2190 if (!strncmp(type, "_ipps.", 6) || !strncmp(type, "_ipp-tls.", 9))
2191 scheme = "ipps";
2192 else if (!strncmp(type, "_ipp.", 5) || !strncmp(type, "_fax-ipp.", 9))
2193 scheme = "ipp";
2194 else if (!strncmp(type, "_http.", 6))
2195 scheme = "http";
2196 else if (!strncmp(type, "_https.", 7))
2197 scheme = "https";
2198 else if (!strncmp(type, "_printer.", 9))
2199 scheme = "lpd";
2200 else if (!strncmp(type, "_pdl-datastream.", 16))
2201 scheme = "socket";
2202 else
2203 {
2204 avahi_service_resolver_free(resolver);
2205 avahi_simple_poll_quit(uribuf->poll);
2206 return;
2207 }
2208
2209 /*
2210 * Extract the remote resource key from the TXT record...
2211 */
2212
2213 if ((uribuf->options & _HTTP_RESOLVE_FAXOUT) &&
2214 (!strcmp(scheme, "ipp") || !strcmp(scheme, "ipps")))
2215 {
2216 reskey = "rfo";
2217 resdefault = "/ipp/faxout";
2218 }
2219 else
2220 {
2221 reskey = "rp";
2222 resdefault = "/";
2223 }
2224
2225 if ((pair = avahi_string_list_find(txt, reskey)) != NULL)
2226 {
2227 avahi_string_list_get_pair(pair, NULL, &value, &valueLen);
2228
2229 if (value[0] == '/')
2230 {
2231 /*
2232 * Value (incorrectly) has a leading slash already...
2233 */
2234
2235 memcpy(resource, value, valueLen);
2236 resource[valueLen] = '\0';
2237 }
2238 else
2239 {
2240 /*
2241 * Convert to resource by concatenating with a leading "/"...
2242 */
2243
2244 resource[0] = '/';
2245 memcpy(resource + 1, value, valueLen);
2246 resource[valueLen + 1] = '\0';
2247 }
2248 }
2249 else
2250 {
2251 /*
2252 * Use the default value...
2253 */
2254
2255 strlcpy(resource, resdefault, sizeof(resource));
2256 }
2257
2258 /*
2259 * Lookup the FQDN if needed...
2260 */
2261
2262 if ((uribuf->options & _HTTP_RESOLVE_FQDN) &&
2263 (hostptr = hostTarget + strlen(hostTarget) - 6) > hostTarget &&
2264 !_cups_strcasecmp(hostptr, ".local"))
2265 {
2266 /*
2267 * OK, we got a .local name but the caller needs a real domain. Start by
2268 * getting the IP address of the .local name and then do reverse-lookups...
2269 */
2270
2271 http_addrlist_t *addrlist, /* List of addresses */
2272 *addr; /* Current address */
2273
2274 DEBUG_printf(("8http_resolve_cb: Looking up \"%s\".", hostTarget));
2275
2276 snprintf(fqdn, sizeof(fqdn), "%d", ntohs(port));
2277 if ((addrlist = httpAddrGetList(hostTarget, AF_UNSPEC, fqdn)) != NULL)
2278 {
2279 for (addr = addrlist; addr; addr = addr->next)
2280 {
2281 int error = getnameinfo(&(addr->addr.addr),
2282 httpAddrLength(&(addr->addr)),
2283 fqdn, sizeof(fqdn), NULL, 0, NI_NAMEREQD);
2284
2285 if (!error)
2286 {
2287 DEBUG_printf(("8http_resolve_cb: Found \"%s\".", fqdn));
2288
2289 if ((hostptr = fqdn + strlen(fqdn) - 6) <= fqdn ||
2290 _cups_strcasecmp(hostptr, ".local"))
2291 {
2292 hostTarget = fqdn;
2293 break;
2294 }
2295 }
2296 #ifdef DEBUG
2297 else
2298 DEBUG_printf(("8http_resolve_cb: \"%s\" did not resolve: %d",
2299 httpAddrString(&(addr->addr), fqdn, sizeof(fqdn)),
2300 error));
2301 #endif /* DEBUG */
2302 }
2303
2304 httpAddrFreeList(addrlist);
2305 }
2306 }
2307
2308 /*
2309 * Assemble the final device URI using the resolved hostname...
2310 */
2311
2312 httpAssembleURI(HTTP_URI_CODING_ALL, uribuf->buffer, uribuf->bufsize, scheme,
2313 NULL, hostTarget, port, resource);
2314 DEBUG_printf(("8http_resolve_cb: Resolved URI is \"%s\".", uribuf->buffer));
2315
2316 avahi_simple_poll_quit(uribuf->poll);
2317 }
2318 #endif /* HAVE_DNSSD */
2319
2320
2321 /*
2322 * End of "$Id: http-support.c 7952 2008-09-17 00:56:20Z mike $".
2323 */
Unnamed repository; edit this file 'description' to name the repository.