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Fix infinite loop on bad PUT (<rdar://problem/23132803>)
[thirdparty/cups.git] / scheduler / client.c
1 /*
2 * "$Id$"
3 *
4 * Client routines for the CUPS scheduler.
5 *
6 * Copyright 2007-2015 by Apple Inc.
7 * Copyright 1997-2007 by Easy Software Products, all rights reserved.
8 *
9 * This file contains Kerberos support code, copyright 2006 by
10 * Jelmer Vernooij.
11 *
12 * These coded instructions, statements, and computer programs are the
13 * property of Apple Inc. and are protected by Federal copyright
14 * law. Distribution and use rights are outlined in the file "LICENSE.txt"
15 * which should have been included with this file. If this file is
16 * file is missing or damaged, see the license at "http://www.cups.org/".
17 */
18
19 /*
20 * Include necessary headers...
21 */
22
23 #define _CUPS_NO_DEPRECATED
24 #define _HTTP_NO_PRIVATE
25 #include "cupsd.h"
26
27 #ifdef __APPLE__
28 # include <libproc.h>
29 #endif /* __APPLE__ */
30 #ifdef HAVE_TCPD_H
31 # include <tcpd.h>
32 #endif /* HAVE_TCPD_H */
33
34
35 /*
36 * Local functions...
37 */
38
39 static int check_if_modified(cupsd_client_t *con,
40 struct stat *filestats);
41 static int compare_clients(cupsd_client_t *a, cupsd_client_t *b,
42 void *data);
43 #ifdef HAVE_SSL
44 static int cupsd_start_tls(cupsd_client_t *con, http_encryption_t e);
45 #endif /* HAVE_SSL */
46 static char *get_file(cupsd_client_t *con, struct stat *filestats,
47 char *filename, size_t len);
48 static http_status_t install_cupsd_conf(cupsd_client_t *con);
49 static int is_cgi(cupsd_client_t *con, const char *filename,
50 struct stat *filestats, mime_type_t *type);
51 static int is_path_absolute(const char *path);
52 static int pipe_command(cupsd_client_t *con, int infile, int *outfile,
53 char *command, char *options, int root);
54 static int valid_host(cupsd_client_t *con);
55 static int write_file(cupsd_client_t *con, http_status_t code,
56 char *filename, char *type,
57 struct stat *filestats);
58 static void write_pipe(cupsd_client_t *con);
59
60
61 /*
62 * 'cupsdAcceptClient()' - Accept a new client.
63 */
64
65 void
66 cupsdAcceptClient(cupsd_listener_t *lis)/* I - Listener socket */
67 {
68 const char *hostname; /* Hostname of client */
69 char name[256]; /* Hostname of client */
70 int count; /* Count of connections on a host */
71 cupsd_client_t *con, /* New client pointer */
72 *tempcon; /* Temporary client pointer */
73 socklen_t addrlen; /* Length of address */
74 http_addr_t temp; /* Temporary address variable */
75 static time_t last_dos = 0; /* Time of last DoS attack */
76 #ifdef HAVE_TCPD_H
77 struct request_info wrap_req; /* TCP wrappers request information */
78 #endif /* HAVE_TCPD_H */
79
80
81 cupsdLogMessage(CUPSD_LOG_DEBUG2,
82 "cupsdAcceptClient(lis=%p(%d)) Clients=%d",
83 lis, lis->fd, cupsArrayCount(Clients));
84
85 /*
86 * Make sure we don't have a full set of clients already...
87 */
88
89 if (cupsArrayCount(Clients) == MaxClients)
90 return;
91
92 /*
93 * Get a pointer to the next available client...
94 */
95
96 if (!Clients)
97 Clients = cupsArrayNew(NULL, NULL);
98
99 if (!Clients)
100 {
101 cupsdLogMessage(CUPSD_LOG_ERROR,
102 "Unable to allocate memory for clients array!");
103 cupsdPauseListening();
104 return;
105 }
106
107 if (!ActiveClients)
108 ActiveClients = cupsArrayNew((cups_array_func_t)compare_clients, NULL);
109
110 if (!ActiveClients)
111 {
112 cupsdLogMessage(CUPSD_LOG_ERROR,
113 "Unable to allocate memory for active clients array!");
114 cupsdPauseListening();
115 return;
116 }
117
118 if ((con = calloc(1, sizeof(cupsd_client_t))) == NULL)
119 {
120 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to allocate memory for client!");
121 cupsdPauseListening();
122 return;
123 }
124
125 /*
126 * Accept the client and get the remote address...
127 */
128
129 con->number = ++ LastClientNumber;
130 con->file = -1;
131
132 if ((con->http = httpAcceptConnection(lis->fd, 0)) == NULL)
133 {
134 if (errno == ENFILE || errno == EMFILE)
135 cupsdPauseListening();
136
137 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to accept client connection - %s.",
138 strerror(errno));
139 free(con);
140
141 return;
142 }
143
144 /*
145 * Save the connected address and port number...
146 */
147
148 con->clientaddr = lis->address;
149
150 /*
151 * Check the number of clients on the same address...
152 */
153
154 for (count = 0, tempcon = (cupsd_client_t *)cupsArrayFirst(Clients);
155 tempcon;
156 tempcon = (cupsd_client_t *)cupsArrayNext(Clients))
157 if (httpAddrEqual(httpGetAddress(tempcon->http), httpGetAddress(con->http)))
158 {
159 count ++;
160 if (count >= MaxClientsPerHost)
161 break;
162 }
163
164 if (count >= MaxClientsPerHost)
165 {
166 if ((time(NULL) - last_dos) >= 60)
167 {
168 last_dos = time(NULL);
169 cupsdLogMessage(CUPSD_LOG_WARN,
170 "Possible DoS attack - more than %d clients connecting "
171 "from %s.",
172 MaxClientsPerHost,
173 httpGetHostname(con->http, name, sizeof(name)));
174 }
175
176 httpClose(con->http);
177 free(con);
178 return;
179 }
180
181 /*
182 * Get the hostname or format the IP address as needed...
183 */
184
185 if (HostNameLookups)
186 hostname = httpResolveHostname(con->http, NULL, 0);
187 else
188 hostname = httpGetHostname(con->http, NULL, 0);
189
190 if (hostname == NULL && HostNameLookups == 2)
191 {
192 /*
193 * Can't have an unresolved IP address with double-lookups enabled...
194 */
195
196 httpClose(con->http);
197
198 cupsdLogClient(con, CUPSD_LOG_WARN,
199 "Name lookup failed - connection from %s closed!",
200 httpGetHostname(con->http, NULL, 0));
201
202 free(con);
203 return;
204 }
205
206 if (HostNameLookups == 2)
207 {
208 /*
209 * Do double lookups as needed...
210 */
211
212 http_addrlist_t *addrlist, /* List of addresses */
213 *addr; /* Current address */
214
215 if ((addrlist = httpAddrGetList(hostname, AF_UNSPEC, NULL)) != NULL)
216 {
217 /*
218 * See if the hostname maps to the same IP address...
219 */
220
221 for (addr = addrlist; addr; addr = addr->next)
222 if (httpAddrEqual(httpGetAddress(con->http), &(addr->addr)))
223 break;
224 }
225 else
226 addr = NULL;
227
228 httpAddrFreeList(addrlist);
229
230 if (!addr)
231 {
232 /*
233 * Can't have a hostname that doesn't resolve to the same IP address
234 * with double-lookups enabled...
235 */
236
237 httpClose(con->http);
238
239 cupsdLogClient(con, CUPSD_LOG_WARN,
240 "IP lookup failed - connection from %s closed!",
241 httpGetHostname(con->http, NULL, 0));
242 free(con);
243 return;
244 }
245 }
246
247 #ifdef HAVE_TCPD_H
248 /*
249 * See if the connection is denied by TCP wrappers...
250 */
251
252 request_init(&wrap_req, RQ_DAEMON, "cupsd", RQ_FILE, httpGetFd(con->http),
253 NULL);
254 fromhost(&wrap_req);
255
256 if (!hosts_access(&wrap_req))
257 {
258 httpClose(con->http);
259
260 cupsdLogClient(con, CUPSD_LOG_WARN,
261 "Connection from %s refused by /etc/hosts.allow and "
262 "/etc/hosts.deny rules.", httpGetHostname(con->http, NULL, 0));
263 free(con);
264 return;
265 }
266 #endif /* HAVE_TCPD_H */
267
268 #ifdef AF_LOCAL
269 if (httpAddrFamily(httpGetAddress(con->http)) == AF_LOCAL)
270 {
271 # ifdef __APPLE__
272 socklen_t peersize; /* Size of peer credentials */
273 pid_t peerpid; /* Peer process ID */
274 char peername[256]; /* Name of process */
275
276 peersize = sizeof(peerpid);
277 if (!getsockopt(httpGetFd(con->http), SOL_LOCAL, LOCAL_PEERPID, &peerpid,
278 &peersize))
279 {
280 if (!proc_name((int)peerpid, peername, sizeof(peername)))
281 cupsdLogClient(con, CUPSD_LOG_DEBUG,
282 "Accepted from %s (Domain ???[%d])",
283 httpGetHostname(con->http, NULL, 0), (int)peerpid);
284 else
285 cupsdLogClient(con, CUPSD_LOG_DEBUG,
286 "Accepted from %s (Domain %s[%d])",
287 httpGetHostname(con->http, NULL, 0), peername, (int)peerpid);
288 }
289 else
290 # endif /* __APPLE__ */
291
292 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Accepted from %s (Domain)",
293 httpGetHostname(con->http, NULL, 0));
294 }
295 else
296 #endif /* AF_LOCAL */
297 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Accepted from %s:%d (IPv%d)",
298 httpGetHostname(con->http, NULL, 0),
299 httpAddrPort(httpGetAddress(con->http)),
300 httpAddrFamily(httpGetAddress(con->http)) == AF_INET ? 4 : 6);
301
302 /*
303 * Get the local address the client connected to...
304 */
305
306 addrlen = sizeof(temp);
307 if (getsockname(httpGetFd(con->http), (struct sockaddr *)&temp, &addrlen))
308 {
309 cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to get local address - %s",
310 strerror(errno));
311
312 strlcpy(con->servername, "localhost", sizeof(con->servername));
313 con->serverport = LocalPort;
314 }
315 #ifdef AF_LOCAL
316 else if (httpAddrFamily(&temp) == AF_LOCAL)
317 {
318 strlcpy(con->servername, "localhost", sizeof(con->servername));
319 con->serverport = LocalPort;
320 }
321 #endif /* AF_LOCAL */
322 else
323 {
324 if (httpAddrLocalhost(&temp))
325 strlcpy(con->servername, "localhost", sizeof(con->servername));
326 else if (HostNameLookups)
327 httpAddrLookup(&temp, con->servername, sizeof(con->servername));
328 else
329 httpAddrString(&temp, con->servername, sizeof(con->servername));
330
331 con->serverport = httpAddrPort(&(lis->address));
332 }
333
334 /*
335 * Add the connection to the array of active clients...
336 */
337
338 cupsArrayAdd(Clients, con);
339
340 /*
341 * Add the socket to the server select.
342 */
343
344 cupsdAddSelect(httpGetFd(con->http), (cupsd_selfunc_t)cupsdReadClient, NULL,
345 con);
346
347 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for request.");
348
349 /*
350 * Temporarily suspend accept()'s until we lose a client...
351 */
352
353 if (cupsArrayCount(Clients) == MaxClients)
354 cupsdPauseListening();
355
356 #ifdef HAVE_SSL
357 /*
358 * See if we are connecting on a secure port...
359 */
360
361 if (lis->encryption == HTTP_ENCRYPTION_ALWAYS)
362 {
363 /*
364 * https connection; go secure...
365 */
366
367 if (cupsd_start_tls(con, HTTP_ENCRYPTION_ALWAYS))
368 cupsdCloseClient(con);
369 }
370 else
371 con->auto_ssl = 1;
372 #endif /* HAVE_SSL */
373 }
374
375
376 /*
377 * 'cupsdCloseAllClients()' - Close all remote clients immediately.
378 */
379
380 void
381 cupsdCloseAllClients(void)
382 {
383 cupsd_client_t *con; /* Current client */
384
385
386 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCloseAllClients() Clients=%d",
387 cupsArrayCount(Clients));
388
389 for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
390 con;
391 con = (cupsd_client_t *)cupsArrayNext(Clients))
392 if (cupsdCloseClient(con))
393 cupsdCloseClient(con);
394 }
395
396
397 /*
398 * 'cupsdCloseClient()' - Close a remote client.
399 */
400
401 int /* O - 1 if partial close, 0 if fully closed */
402 cupsdCloseClient(cupsd_client_t *con) /* I - Client to close */
403 {
404 int partial; /* Do partial close for SSL? */
405
406
407 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing connection.");
408
409 /*
410 * Flush pending writes before closing...
411 */
412
413 httpFlushWrite(con->http);
414
415 partial = 0;
416
417 if (con->pipe_pid != 0)
418 {
419 /*
420 * Stop any CGI process...
421 */
422
423 cupsdEndProcess(con->pipe_pid, 1);
424 con->pipe_pid = 0;
425 }
426
427 if (con->file >= 0)
428 {
429 cupsdRemoveSelect(con->file);
430
431 close(con->file);
432 con->file = -1;
433 }
434
435 /*
436 * Close the socket and clear the file from the input set for select()...
437 */
438
439 if (httpGetFd(con->http) >= 0)
440 {
441 cupsArrayRemove(ActiveClients, con);
442 cupsdSetBusyState();
443
444 #ifdef HAVE_SSL
445 /*
446 * Shutdown encryption as needed...
447 */
448
449 if (httpIsEncrypted(con->http))
450 partial = 1;
451 #endif /* HAVE_SSL */
452
453 if (partial)
454 {
455 /*
456 * Only do a partial close so that the encrypted client gets everything.
457 */
458
459 httpShutdown(con->http);
460 cupsdAddSelect(httpGetFd(con->http), (cupsd_selfunc_t)cupsdReadClient,
461 NULL, con);
462
463 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for socket close.");
464 }
465 else
466 {
467 /*
468 * Shut the socket down fully...
469 */
470
471 cupsdRemoveSelect(httpGetFd(con->http));
472 httpClose(con->http);
473 con->http = NULL;
474 }
475 }
476
477 if (!partial)
478 {
479 /*
480 * Free memory...
481 */
482
483 cupsdRemoveSelect(httpGetFd(con->http));
484
485 httpClose(con->http);
486
487 if (con->filename)
488 {
489 unlink(con->filename);
490 cupsdClearString(&con->filename);
491 }
492
493 cupsdClearString(&con->command);
494 cupsdClearString(&con->options);
495 cupsdClearString(&con->query_string);
496
497 if (con->request)
498 {
499 ippDelete(con->request);
500 con->request = NULL;
501 }
502
503 if (con->response)
504 {
505 ippDelete(con->response);
506 con->response = NULL;
507 }
508
509 if (con->language)
510 {
511 cupsLangFree(con->language);
512 con->language = NULL;
513 }
514
515 #ifdef HAVE_AUTHORIZATION_H
516 if (con->authref)
517 {
518 AuthorizationFree(con->authref, kAuthorizationFlagDefaults);
519 con->authref = NULL;
520 }
521 #endif /* HAVE_AUTHORIZATION_H */
522
523 /*
524 * Re-enable new client connections if we are going back under the
525 * limit...
526 */
527
528 if (cupsArrayCount(Clients) == MaxClients)
529 cupsdResumeListening();
530
531 /*
532 * Compact the list of clients as necessary...
533 */
534
535 cupsArrayRemove(Clients, con);
536
537 free(con);
538 }
539
540 return (partial);
541 }
542
543
544 /*
545 * 'cupsdReadClient()' - Read data from a client.
546 */
547
548 void
549 cupsdReadClient(cupsd_client_t *con) /* I - Client to read from */
550 {
551 char line[32768], /* Line from client... */
552 locale[64], /* Locale */
553 *ptr; /* Pointer into strings */
554 http_status_t status; /* Transfer status */
555 ipp_state_t ipp_state; /* State of IPP transfer */
556 int bytes; /* Number of bytes to POST */
557 char *filename; /* Name of file for GET/HEAD */
558 char buf[1024]; /* Buffer for real filename */
559 struct stat filestats; /* File information */
560 mime_type_t *type; /* MIME type of file */
561 cupsd_printer_t *p; /* Printer */
562 static unsigned request_id = 0; /* Request ID for temp files */
563
564
565 status = HTTP_STATUS_CONTINUE;
566
567 cupsdLogClient(con, CUPSD_LOG_DEBUG2,
568 "cupsdReadClient "
569 "error=%d, "
570 "used=%d, "
571 "state=%s, "
572 "data_encoding=HTTP_ENCODING_%s, "
573 "data_remaining=" CUPS_LLFMT ", "
574 "request=%p(%s), "
575 "file=%d",
576 httpError(con->http), (int)httpGetReady(con->http),
577 httpStateString(httpGetState(con->http)),
578 httpIsChunked(con->http) ? "CHUNKED" : "LENGTH",
579 CUPS_LLCAST httpGetRemaining(con->http),
580 con->request,
581 con->request ? ippStateString(ippGetState(con->request)) : "",
582 con->file);
583
584 if (httpGetState(con->http) == HTTP_STATE_GET_SEND ||
585 httpGetState(con->http) == HTTP_STATE_POST_SEND ||
586 httpGetState(con->http) == HTTP_STATE_STATUS)
587 {
588 /*
589 * If we get called in the wrong state, then something went wrong with the
590 * connection and we need to shut it down...
591 */
592
593 if (!httpGetReady(con->http) && recv(httpGetFd(con->http), buf, 1, MSG_PEEK) < 1)
594 {
595 /*
596 * Connection closed...
597 */
598
599 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing on EOF.");
600 cupsdCloseClient(con);
601 return;
602 }
603
604 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing on unexpected HTTP read state %s.",
605 httpStateString(httpGetState(con->http)));
606 cupsdCloseClient(con);
607 return;
608 }
609
610 #ifdef HAVE_SSL
611 if (con->auto_ssl)
612 {
613 /*
614 * Automatically check for a SSL/TLS handshake...
615 */
616
617 con->auto_ssl = 0;
618
619 if (recv(httpGetFd(con->http), buf, 1, MSG_PEEK) == 1 &&
620 (!buf[0] || !strchr("DGHOPT", buf[0])))
621 {
622 /*
623 * Encrypt this connection...
624 */
625
626 cupsdLogClient(con, CUPSD_LOG_DEBUG2,
627 "Saw first byte %02X, auto-negotiating "
628 "SSL/TLS session.", buf[0] & 255);
629
630 if (cupsd_start_tls(con, HTTP_ENCRYPTION_ALWAYS))
631 cupsdCloseClient(con);
632
633 return;
634 }
635 }
636 #endif /* HAVE_SSL */
637
638 switch (httpGetState(con->http))
639 {
640 case HTTP_STATE_WAITING :
641 /*
642 * See if we've received a request line...
643 */
644
645 con->operation = httpReadRequest(con->http, con->uri, sizeof(con->uri));
646 if (con->operation == HTTP_STATE_ERROR ||
647 con->operation == HTTP_STATE_UNKNOWN_METHOD ||
648 con->operation == HTTP_STATE_UNKNOWN_VERSION)
649 {
650 if (httpError(con->http))
651 cupsdLogClient(con, CUPSD_LOG_DEBUG,
652 "HTTP_STATE_WAITING Closing for error %d (%s)",
653 httpError(con->http), strerror(httpError(con->http)));
654 else
655 cupsdLogClient(con, CUPSD_LOG_DEBUG,
656 "HTTP_STATE_WAITING Closing on error: %s",
657 cupsLastErrorString());
658
659 cupsdCloseClient(con);
660 return;
661 }
662
663 /*
664 * Ignore blank request lines...
665 */
666
667 if (con->operation == HTTP_STATE_WAITING)
668 break;
669
670 /*
671 * Clear other state variables...
672 */
673
674 con->bytes = 0;
675 con->file = -1;
676 con->file_ready = 0;
677 con->pipe_pid = 0;
678 con->username[0] = '\0';
679 con->password[0] = '\0';
680
681 cupsdClearString(&con->command);
682 cupsdClearString(&con->options);
683 cupsdClearString(&con->query_string);
684
685 if (con->request)
686 {
687 ippDelete(con->request);
688 con->request = NULL;
689 }
690
691 if (con->response)
692 {
693 ippDelete(con->response);
694 con->response = NULL;
695 }
696
697 if (con->language)
698 {
699 cupsLangFree(con->language);
700 con->language = NULL;
701 }
702
703 #ifdef HAVE_GSSAPI
704 con->have_gss = 0;
705 con->gss_uid = 0;
706 #endif /* HAVE_GSSAPI */
707
708 /*
709 * Handle full URLs in the request line...
710 */
711
712 if (strcmp(con->uri, "*"))
713 {
714 char scheme[HTTP_MAX_URI], /* Method/scheme */
715 userpass[HTTP_MAX_URI], /* Username:password */
716 hostname[HTTP_MAX_URI], /* Hostname */
717 resource[HTTP_MAX_URI]; /* Resource path */
718 int port; /* Port number */
719
720 /*
721 * Separate the URI into its components...
722 */
723
724 if (httpSeparateURI(HTTP_URI_CODING_MOST, con->uri,
725 scheme, sizeof(scheme),
726 userpass, sizeof(userpass),
727 hostname, sizeof(hostname), &port,
728 resource, sizeof(resource)) < HTTP_URI_STATUS_OK)
729 {
730 cupsdLogClient(con, CUPSD_LOG_ERROR, "Bad URI \"%s\" in request.",
731 con->uri);
732 cupsdSendError(con, HTTP_STATUS_METHOD_NOT_ALLOWED, CUPSD_AUTH_NONE);
733 cupsdCloseClient(con);
734 return;
735 }
736
737 /*
738 * Only allow URIs with the servername, localhost, or an IP
739 * address...
740 */
741
742 if (strcmp(scheme, "file") &&
743 _cups_strcasecmp(hostname, ServerName) &&
744 _cups_strcasecmp(hostname, "localhost") &&
745 !cupsArrayFind(ServerAlias, hostname) &&
746 !isdigit(hostname[0]) && hostname[0] != '[')
747 {
748 /*
749 * Nope, we don't do proxies...
750 */
751
752 cupsdLogClient(con, CUPSD_LOG_ERROR, "Bad URI \"%s\" in request.",
753 con->uri);
754 cupsdSendError(con, HTTP_STATUS_METHOD_NOT_ALLOWED, CUPSD_AUTH_NONE);
755 cupsdCloseClient(con);
756 return;
757 }
758
759 /*
760 * Copy the resource portion back into the URI; both resource and
761 * con->uri are HTTP_MAX_URI bytes in size...
762 */
763
764 strlcpy(con->uri, resource, sizeof(con->uri));
765 }
766
767 /*
768 * Process the request...
769 */
770
771 gettimeofday(&(con->start), NULL);
772
773 cupsdLogClient(con, CUPSD_LOG_DEBUG, "%s %s HTTP/%d.%d",
774 httpStateString(con->operation) + 11, con->uri,
775 httpGetVersion(con->http) / 100,
776 httpGetVersion(con->http) % 100);
777
778 if (!cupsArrayFind(ActiveClients, con))
779 {
780 cupsArrayAdd(ActiveClients, con);
781 cupsdSetBusyState();
782 }
783
784 case HTTP_STATE_OPTIONS :
785 case HTTP_STATE_DELETE :
786 case HTTP_STATE_GET :
787 case HTTP_STATE_HEAD :
788 case HTTP_STATE_POST :
789 case HTTP_STATE_PUT :
790 case HTTP_STATE_TRACE :
791 /*
792 * Parse incoming parameters until the status changes...
793 */
794
795 while ((status = httpUpdate(con->http)) == HTTP_STATUS_CONTINUE)
796 if (!httpGetReady(con->http))
797 break;
798
799 if (status != HTTP_STATUS_OK && status != HTTP_STATUS_CONTINUE)
800 {
801 if (httpError(con->http) && httpError(con->http) != EPIPE)
802 cupsdLogClient(con, CUPSD_LOG_DEBUG,
803 "Closing for error %d (%s) while reading headers.",
804 httpError(con->http), strerror(httpError(con->http)));
805 else
806 cupsdLogClient(con, CUPSD_LOG_DEBUG,
807 "Closing on EOF while reading headers.");
808
809 cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE);
810 cupsdCloseClient(con);
811 return;
812 }
813 break;
814
815 default :
816 if (!httpGetReady(con->http) && recv(httpGetFd(con->http), buf, 1, MSG_PEEK) < 1)
817 {
818 /*
819 * Connection closed...
820 */
821
822 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing on EOF.");
823 cupsdCloseClient(con);
824 return;
825 }
826 break; /* Anti-compiler-warning-code */
827 }
828
829 /*
830 * Handle new transfers...
831 */
832
833 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Read: status=%d", status);
834
835 if (status == HTTP_STATUS_OK)
836 {
837 if (httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE)[0])
838 {
839 /*
840 * Figure out the locale from the Accept-Language and Content-Type
841 * fields...
842 */
843
844 if ((ptr = strchr(httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE),
845 ',')) != NULL)
846 *ptr = '\0';
847
848 if ((ptr = strchr(httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE),
849 ';')) != NULL)
850 *ptr = '\0';
851
852 if ((ptr = strstr(httpGetField(con->http, HTTP_FIELD_CONTENT_TYPE),
853 "charset=")) != NULL)
854 {
855 /*
856 * Combine language and charset, and trim any extra params in the
857 * content-type.
858 */
859
860 snprintf(locale, sizeof(locale), "%s.%s",
861 httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE), ptr + 8);
862
863 if ((ptr = strchr(locale, ',')) != NULL)
864 *ptr = '\0';
865 }
866 else
867 snprintf(locale, sizeof(locale), "%s.UTF-8",
868 httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE));
869
870 con->language = cupsLangGet(locale);
871 }
872 else
873 con->language = cupsLangGet(DefaultLocale);
874
875 cupsdAuthorize(con);
876
877 if (!_cups_strncasecmp(httpGetField(con->http, HTTP_FIELD_CONNECTION),
878 "Keep-Alive", 10) && KeepAlive)
879 httpSetKeepAlive(con->http, HTTP_KEEPALIVE_ON);
880 else if (!_cups_strncasecmp(httpGetField(con->http, HTTP_FIELD_CONNECTION),
881 "close", 5))
882 httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF);
883
884 if (!httpGetField(con->http, HTTP_FIELD_HOST)[0] &&
885 httpGetVersion(con->http) >= HTTP_VERSION_1_1)
886 {
887 /*
888 * HTTP/1.1 and higher require the "Host:" field...
889 */
890
891 if (!cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE))
892 {
893 cupsdLogClient(con, CUPSD_LOG_ERROR, "Missing Host: field in request.");
894 cupsdCloseClient(con);
895 return;
896 }
897 }
898 else if (!valid_host(con))
899 {
900 /*
901 * Access to localhost must use "localhost" or the corresponding IPv4
902 * or IPv6 values in the Host: field.
903 */
904
905 cupsdLogClient(con, CUPSD_LOG_ERROR,
906 "Request from \"%s\" using invalid Host: field \"%s\".",
907 httpGetHostname(con->http, NULL, 0), httpGetField(con->http, HTTP_FIELD_HOST));
908
909 if (!cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE))
910 {
911 cupsdCloseClient(con);
912 return;
913 }
914 }
915 else if (con->operation == HTTP_STATE_OPTIONS)
916 {
917 /*
918 * Do OPTIONS command...
919 */
920
921 if (con->best && con->best->type != CUPSD_AUTH_NONE)
922 {
923 httpClearFields(con->http);
924
925 if (!cupsdSendHeader(con, HTTP_STATUS_UNAUTHORIZED, NULL, CUPSD_AUTH_NONE))
926 {
927 cupsdCloseClient(con);
928 return;
929 }
930 }
931
932 if (!_cups_strcasecmp(httpGetField(con->http, HTTP_FIELD_CONNECTION), "Upgrade") && strstr(httpGetField(con->http, HTTP_FIELD_UPGRADE), "TLS/") != NULL && !httpIsEncrypted(con->http))
933 {
934 #ifdef HAVE_SSL
935 /*
936 * Do encryption stuff...
937 */
938
939 httpClearFields(con->http);
940
941 if (!cupsdSendHeader(con, HTTP_STATUS_SWITCHING_PROTOCOLS, NULL, CUPSD_AUTH_NONE))
942 {
943 cupsdCloseClient(con);
944 return;
945 }
946
947 if (cupsd_start_tls(con, HTTP_ENCRYPTION_REQUIRED))
948 {
949 cupsdCloseClient(con);
950 return;
951 }
952 #else
953 if (!cupsdSendError(con, HTTP_STATUS_NOT_IMPLEMENTED, CUPSD_AUTH_NONE))
954 {
955 cupsdCloseClient(con);
956 return;
957 }
958 #endif /* HAVE_SSL */
959 }
960
961 httpClearFields(con->http);
962 httpSetField(con->http, HTTP_FIELD_ALLOW,
963 "GET, HEAD, OPTIONS, POST, PUT");
964 httpSetField(con->http, HTTP_FIELD_CONTENT_LENGTH, "0");
965
966 if (!cupsdSendHeader(con, HTTP_STATUS_OK, NULL, CUPSD_AUTH_NONE))
967 {
968 cupsdCloseClient(con);
969 return;
970 }
971 }
972 else if (!is_path_absolute(con->uri))
973 {
974 /*
975 * Protect against malicious users!
976 */
977
978 cupsdLogClient(con, CUPSD_LOG_ERROR,
979 "Request for non-absolute resource \"%s\".", con->uri);
980
981 if (!cupsdSendError(con, HTTP_STATUS_FORBIDDEN, CUPSD_AUTH_NONE))
982 {
983 cupsdCloseClient(con);
984 return;
985 }
986 }
987 else
988 {
989 if (!_cups_strcasecmp(httpGetField(con->http, HTTP_FIELD_CONNECTION),
990 "Upgrade") && !httpIsEncrypted(con->http))
991 {
992 #ifdef HAVE_SSL
993 /*
994 * Do encryption stuff...
995 */
996
997 httpClearFields(con->http);
998
999 if (!cupsdSendHeader(con, HTTP_STATUS_SWITCHING_PROTOCOLS, NULL,
1000 CUPSD_AUTH_NONE))
1001 {
1002 cupsdCloseClient(con);
1003 return;
1004 }
1005
1006 if (cupsd_start_tls(con, HTTP_ENCRYPTION_REQUIRED))
1007 {
1008 cupsdCloseClient(con);
1009 return;
1010 }
1011 #else
1012 if (!cupsdSendError(con, HTTP_STATUS_NOT_IMPLEMENTED, CUPSD_AUTH_NONE))
1013 {
1014 cupsdCloseClient(con);
1015 return;
1016 }
1017 #endif /* HAVE_SSL */
1018 }
1019
1020 if ((status = cupsdIsAuthorized(con, NULL)) != HTTP_STATUS_OK)
1021 {
1022 cupsdSendError(con, status, CUPSD_AUTH_NONE);
1023 cupsdCloseClient(con);
1024 return;
1025 }
1026
1027 if (httpGetExpect(con->http) &&
1028 (con->operation == HTTP_STATE_POST || con->operation == HTTP_STATE_PUT))
1029 {
1030 if (httpGetExpect(con->http) == HTTP_STATUS_CONTINUE)
1031 {
1032 /*
1033 * Send 100-continue header...
1034 */
1035
1036 if (httpWriteResponse(con->http, HTTP_STATUS_CONTINUE))
1037 {
1038 cupsdCloseClient(con);
1039 return;
1040 }
1041 }
1042 else
1043 {
1044 /*
1045 * Send 417-expectation-failed header...
1046 */
1047
1048 httpClearFields(con->http);
1049 httpSetField(con->http, HTTP_FIELD_CONTENT_LENGTH, "0");
1050
1051 cupsdSendError(con, HTTP_STATUS_EXPECTATION_FAILED, CUPSD_AUTH_NONE);
1052 cupsdCloseClient(con);
1053 return;
1054 }
1055 }
1056
1057 switch (httpGetState(con->http))
1058 {
1059 case HTTP_STATE_GET_SEND :
1060 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Processing GET %s", con->uri);
1061
1062 if ((!strncmp(con->uri, "/ppd/", 5) ||
1063 !strncmp(con->uri, "/printers/", 10) ||
1064 !strncmp(con->uri, "/classes/", 9)) &&
1065 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1066 {
1067 /*
1068 * Send PPD file - get the real printer name since printer
1069 * names are not case sensitive but filenames can be...
1070 */
1071
1072 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1073
1074 if (!strncmp(con->uri, "/ppd/", 5))
1075 p = cupsdFindPrinter(con->uri + 5);
1076 else if (!strncmp(con->uri, "/printers/", 10))
1077 p = cupsdFindPrinter(con->uri + 10);
1078 else
1079 {
1080 p = cupsdFindClass(con->uri + 9);
1081
1082 if (p)
1083 {
1084 int i; /* Looping var */
1085
1086 for (i = 0; i < p->num_printers; i ++)
1087 {
1088 if (!(p->printers[i]->type & CUPS_PRINTER_CLASS))
1089 {
1090 char ppdname[1024];/* PPD filename */
1091
1092 snprintf(ppdname, sizeof(ppdname), "%s/ppd/%s.ppd",
1093 ServerRoot, p->printers[i]->name);
1094 if (!access(ppdname, 0))
1095 {
1096 p = p->printers[i];
1097 break;
1098 }
1099 }
1100 }
1101
1102 if (i >= p->num_printers)
1103 p = NULL;
1104 }
1105 }
1106
1107 if (p)
1108 {
1109 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1110 }
1111 else
1112 {
1113 if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE))
1114 {
1115 cupsdCloseClient(con);
1116 return;
1117 }
1118
1119 break;
1120 }
1121 }
1122 else if ((!strncmp(con->uri, "/icons/", 7) ||
1123 !strncmp(con->uri, "/printers/", 10) ||
1124 !strncmp(con->uri, "/classes/", 9)) &&
1125 !strcmp(con->uri + strlen(con->uri) - 4, ".png"))
1126 {
1127 /*
1128 * Send icon file - get the real queue name since queue names are
1129 * not case sensitive but filenames can be...
1130 */
1131
1132 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".png" */
1133
1134 if (!strncmp(con->uri, "/icons/", 7))
1135 p = cupsdFindPrinter(con->uri + 7);
1136 else if (!strncmp(con->uri, "/printers/", 10))
1137 p = cupsdFindPrinter(con->uri + 10);
1138 else
1139 {
1140 p = cupsdFindClass(con->uri + 9);
1141
1142 if (p)
1143 {
1144 int i; /* Looping var */
1145
1146 for (i = 0; i < p->num_printers; i ++)
1147 {
1148 if (!(p->printers[i]->type & CUPS_PRINTER_CLASS))
1149 {
1150 char ppdname[1024];/* PPD filename */
1151
1152 snprintf(ppdname, sizeof(ppdname), "%s/ppd/%s.ppd",
1153 ServerRoot, p->printers[i]->name);
1154 if (!access(ppdname, 0))
1155 {
1156 p = p->printers[i];
1157 break;
1158 }
1159 }
1160 }
1161
1162 if (i >= p->num_printers)
1163 p = NULL;
1164 }
1165 }
1166
1167 if (p)
1168 snprintf(con->uri, sizeof(con->uri), "/icons/%s.png", p->name);
1169 else
1170 {
1171 if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE))
1172 {
1173 cupsdCloseClient(con);
1174 return;
1175 }
1176
1177 break;
1178 }
1179 }
1180 else if (!WebInterface)
1181 {
1182 /*
1183 * Web interface is disabled. Show an appropriate message...
1184 */
1185
1186 if (!cupsdSendError(con, HTTP_STATUS_CUPS_WEBIF_DISABLED, CUPSD_AUTH_NONE))
1187 {
1188 cupsdCloseClient(con);
1189 return;
1190 }
1191
1192 break;
1193 }
1194
1195 if ((!strncmp(con->uri, "/admin", 6) &&
1196 strncmp(con->uri, "/admin/conf/", 12) &&
1197 strncmp(con->uri, "/admin/log/", 11)) ||
1198 !strncmp(con->uri, "/printers", 9) ||
1199 !strncmp(con->uri, "/classes", 8) ||
1200 !strncmp(con->uri, "/help", 5) ||
1201 !strncmp(con->uri, "/jobs", 5))
1202 {
1203 /*
1204 * Send CGI output...
1205 */
1206
1207 if (!strncmp(con->uri, "/admin", 6))
1208 {
1209 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1210 ServerBin);
1211
1212 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1213 }
1214 else if (!strncmp(con->uri, "/printers", 9))
1215 {
1216 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1217 ServerBin);
1218
1219 if (con->uri[9] && con->uri[10])
1220 cupsdSetString(&con->options, con->uri + 9);
1221 else
1222 cupsdSetString(&con->options, NULL);
1223 }
1224 else if (!strncmp(con->uri, "/classes", 8))
1225 {
1226 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1227 ServerBin);
1228
1229 if (con->uri[8] && con->uri[9])
1230 cupsdSetString(&con->options, con->uri + 8);
1231 else
1232 cupsdSetString(&con->options, NULL);
1233 }
1234 else if (!strncmp(con->uri, "/jobs", 5))
1235 {
1236 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1237 ServerBin);
1238
1239 if (con->uri[5] && con->uri[6])
1240 cupsdSetString(&con->options, con->uri + 5);
1241 else
1242 cupsdSetString(&con->options, NULL);
1243 }
1244 else
1245 {
1246 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1247 ServerBin);
1248
1249 if (con->uri[5] && con->uri[6])
1250 cupsdSetString(&con->options, con->uri + 5);
1251 else
1252 cupsdSetString(&con->options, NULL);
1253 }
1254
1255 if (!cupsdSendCommand(con, con->command, con->options, 0))
1256 {
1257 if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE))
1258 {
1259 cupsdCloseClient(con);
1260 return;
1261 }
1262 }
1263 else
1264 cupsdLogRequest(con, HTTP_STATUS_OK);
1265
1266 if (httpGetVersion(con->http) <= HTTP_VERSION_1_0)
1267 httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF);
1268 }
1269 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1270 (strchr(con->uri + 12, '/') ||
1271 strlen(con->uri) == 12)) ||
1272 (!strncmp(con->uri, "/admin/log/", 11) &&
1273 (strchr(con->uri + 11, '/') ||
1274 strlen(con->uri) == 11)))
1275 {
1276 /*
1277 * GET can only be done to configuration files directly under
1278 * /admin/conf...
1279 */
1280
1281 cupsdLogClient(con, CUPSD_LOG_ERROR,
1282 "Request for subdirectory \"%s\"!", con->uri);
1283
1284 if (!cupsdSendError(con, HTTP_STATUS_FORBIDDEN, CUPSD_AUTH_NONE))
1285 {
1286 cupsdCloseClient(con);
1287 return;
1288 }
1289
1290 break;
1291 }
1292 else
1293 {
1294 /*
1295 * Serve a file...
1296 */
1297
1298 if ((filename = get_file(con, &filestats, buf,
1299 sizeof(buf))) == NULL)
1300 {
1301 if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE))
1302 {
1303 cupsdCloseClient(con);
1304 return;
1305 }
1306
1307 break;
1308 }
1309
1310 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1311
1312 cupsdLogClient(con, CUPSD_LOG_DEBUG, "filename=\"%s\", type=%s/%s", filename, type ? type->super : "", type ? type->type : "");
1313
1314 if (is_cgi(con, filename, &filestats, type))
1315 {
1316 /*
1317 * Note: con->command and con->options were set by
1318 * is_cgi()...
1319 */
1320
1321 if (!cupsdSendCommand(con, con->command, con->options, 0))
1322 {
1323 if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE))
1324 {
1325 cupsdCloseClient(con);
1326 return;
1327 }
1328 }
1329 else
1330 cupsdLogRequest(con, HTTP_STATUS_OK);
1331
1332 if (httpGetVersion(con->http) <= HTTP_VERSION_1_0)
1333 httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF);
1334 break;
1335 }
1336
1337 if (!check_if_modified(con, &filestats))
1338 {
1339 if (!cupsdSendError(con, HTTP_STATUS_NOT_MODIFIED, CUPSD_AUTH_NONE))
1340 {
1341 cupsdCloseClient(con);
1342 return;
1343 }
1344 }
1345 else
1346 {
1347 if (type == NULL)
1348 strlcpy(line, "text/plain", sizeof(line));
1349 else
1350 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1351
1352 if (!write_file(con, HTTP_STATUS_OK, filename, line, &filestats))
1353 {
1354 cupsdCloseClient(con);
1355 return;
1356 }
1357 }
1358 }
1359 break;
1360
1361 case HTTP_STATE_POST_RECV :
1362 /*
1363 * See if the POST request includes a Content-Length field, and if
1364 * so check the length against any limits that are set...
1365 */
1366
1367 if (httpGetField(con->http, HTTP_FIELD_CONTENT_LENGTH)[0] &&
1368 MaxRequestSize > 0 &&
1369 httpGetLength2(con->http) > MaxRequestSize)
1370 {
1371 /*
1372 * Request too large...
1373 */
1374
1375 if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1376 {
1377 cupsdCloseClient(con);
1378 return;
1379 }
1380
1381 break;
1382 }
1383 else if (httpGetLength2(con->http) < 0)
1384 {
1385 /*
1386 * Negative content lengths are invalid!
1387 */
1388
1389 if (!cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE))
1390 {
1391 cupsdCloseClient(con);
1392 return;
1393 }
1394
1395 break;
1396 }
1397
1398 /*
1399 * See what kind of POST request this is; for IPP requests the
1400 * content-type field will be "application/ipp"...
1401 */
1402
1403 if (!strcmp(httpGetField(con->http, HTTP_FIELD_CONTENT_TYPE),
1404 "application/ipp"))
1405 con->request = ippNew();
1406 else if (!WebInterface)
1407 {
1408 /*
1409 * Web interface is disabled. Show an appropriate message...
1410 */
1411
1412 if (!cupsdSendError(con, HTTP_STATUS_CUPS_WEBIF_DISABLED, CUPSD_AUTH_NONE))
1413 {
1414 cupsdCloseClient(con);
1415 return;
1416 }
1417
1418 break;
1419 }
1420 else if ((!strncmp(con->uri, "/admin", 6) &&
1421 strncmp(con->uri, "/admin/conf/", 12) &&
1422 strncmp(con->uri, "/admin/log/", 11)) ||
1423 !strncmp(con->uri, "/printers", 9) ||
1424 !strncmp(con->uri, "/classes", 8) ||
1425 !strncmp(con->uri, "/help", 5) ||
1426 !strncmp(con->uri, "/jobs", 5))
1427 {
1428 /*
1429 * CGI request...
1430 */
1431
1432 if (!strncmp(con->uri, "/admin", 6))
1433 {
1434 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1435 ServerBin);
1436
1437 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1438 }
1439 else if (!strncmp(con->uri, "/printers", 9))
1440 {
1441 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1442 ServerBin);
1443
1444 if (con->uri[9] && con->uri[10])
1445 cupsdSetString(&con->options, con->uri + 9);
1446 else
1447 cupsdSetString(&con->options, NULL);
1448 }
1449 else if (!strncmp(con->uri, "/classes", 8))
1450 {
1451 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1452 ServerBin);
1453
1454 if (con->uri[8] && con->uri[9])
1455 cupsdSetString(&con->options, con->uri + 8);
1456 else
1457 cupsdSetString(&con->options, NULL);
1458 }
1459 else if (!strncmp(con->uri, "/jobs", 5))
1460 {
1461 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1462 ServerBin);
1463
1464 if (con->uri[5] && con->uri[6])
1465 cupsdSetString(&con->options, con->uri + 5);
1466 else
1467 cupsdSetString(&con->options, NULL);
1468 }
1469 else
1470 {
1471 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1472 ServerBin);
1473
1474 if (con->uri[5] && con->uri[6])
1475 cupsdSetString(&con->options, con->uri + 5);
1476 else
1477 cupsdSetString(&con->options, NULL);
1478 }
1479
1480 if (httpGetVersion(con->http) <= HTTP_VERSION_1_0)
1481 httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF);
1482 }
1483 else
1484 {
1485 /*
1486 * POST to a file...
1487 */
1488
1489 if ((filename = get_file(con, &filestats, buf,
1490 sizeof(buf))) == NULL)
1491 {
1492 if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE))
1493 {
1494 cupsdCloseClient(con);
1495 return;
1496 }
1497
1498 break;
1499 }
1500
1501 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1502
1503 if (!is_cgi(con, filename, &filestats, type))
1504 {
1505 /*
1506 * Only POST to CGI's...
1507 */
1508
1509 if (!cupsdSendError(con, HTTP_STATUS_UNAUTHORIZED, CUPSD_AUTH_NONE))
1510 {
1511 cupsdCloseClient(con);
1512 return;
1513 }
1514 }
1515 }
1516 break;
1517
1518 case HTTP_STATE_PUT_RECV :
1519 /*
1520 * Validate the resource name...
1521 */
1522
1523 if (strcmp(con->uri, "/admin/conf/cupsd.conf"))
1524 {
1525 /*
1526 * PUT can only be done to the cupsd.conf file...
1527 */
1528
1529 cupsdLogClient(con, CUPSD_LOG_ERROR,
1530 "Disallowed PUT request for \"%s\".", con->uri);
1531
1532 if (!cupsdSendError(con, HTTP_STATUS_FORBIDDEN, CUPSD_AUTH_NONE))
1533 {
1534 cupsdCloseClient(con);
1535 return;
1536 }
1537
1538 break;
1539 }
1540
1541 /*
1542 * See if the PUT request includes a Content-Length field, and if
1543 * so check the length against any limits that are set...
1544 */
1545
1546 if (httpGetField(con->http, HTTP_FIELD_CONTENT_LENGTH)[0] &&
1547 MaxRequestSize > 0 &&
1548 httpGetLength2(con->http) > MaxRequestSize)
1549 {
1550 /*
1551 * Request too large...
1552 */
1553
1554 if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1555 {
1556 cupsdCloseClient(con);
1557 return;
1558 }
1559
1560 break;
1561 }
1562 else if (httpGetLength2(con->http) < 0)
1563 {
1564 /*
1565 * Negative content lengths are invalid!
1566 */
1567
1568 if (!cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE))
1569 {
1570 cupsdCloseClient(con);
1571 return;
1572 }
1573
1574 break;
1575 }
1576
1577 /*
1578 * Open a temporary file to hold the request...
1579 */
1580
1581 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot,
1582 request_id ++);
1583 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
1584
1585 if (con->file < 0)
1586 {
1587 cupsdLogClient(con, CUPSD_LOG_ERROR,
1588 "Unable to create request file \"%s\": %s",
1589 con->filename, strerror(errno));
1590
1591 if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1592 {
1593 cupsdCloseClient(con);
1594 return;
1595 }
1596 }
1597
1598 fchmod(con->file, 0640);
1599 fchown(con->file, RunUser, Group);
1600 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
1601 break;
1602
1603 case HTTP_STATE_DELETE :
1604 case HTTP_STATE_TRACE :
1605 cupsdSendError(con, HTTP_STATUS_NOT_IMPLEMENTED, CUPSD_AUTH_NONE);
1606 cupsdCloseClient(con);
1607 return;
1608
1609 case HTTP_STATE_HEAD :
1610 if (!strncmp(con->uri, "/printers/", 10) &&
1611 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1612 {
1613 /*
1614 * Send PPD file - get the real printer name since printer
1615 * names are not case sensitive but filenames can be...
1616 */
1617
1618 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1619
1620 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1621 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1622 else
1623 {
1624 if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE))
1625 {
1626 cupsdCloseClient(con);
1627 return;
1628 }
1629
1630 cupsdLogRequest(con, HTTP_STATUS_NOT_FOUND);
1631 break;
1632 }
1633 }
1634 else if (!strncmp(con->uri, "/printers/", 10) &&
1635 !strcmp(con->uri + strlen(con->uri) - 4, ".png"))
1636 {
1637 /*
1638 * Send PNG file - get the real printer name since printer
1639 * names are not case sensitive but filenames can be...
1640 */
1641
1642 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1643
1644 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1645 snprintf(con->uri, sizeof(con->uri), "/icons/%s.png", p->name);
1646 else
1647 {
1648 if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE))
1649 {
1650 cupsdCloseClient(con);
1651 return;
1652 }
1653
1654 cupsdLogRequest(con, HTTP_STATUS_NOT_FOUND);
1655 break;
1656 }
1657 }
1658 else if (!WebInterface)
1659 {
1660 httpClearFields(con->http);
1661
1662 if (!cupsdSendHeader(con, HTTP_STATUS_OK, NULL, CUPSD_AUTH_NONE))
1663 {
1664 cupsdCloseClient(con);
1665 return;
1666 }
1667
1668 cupsdLogRequest(con, HTTP_STATUS_OK);
1669 break;
1670 }
1671
1672 if ((!strncmp(con->uri, "/admin", 6) &&
1673 strncmp(con->uri, "/admin/conf/", 12) &&
1674 strncmp(con->uri, "/admin/log/", 11)) ||
1675 !strncmp(con->uri, "/printers", 9) ||
1676 !strncmp(con->uri, "/classes", 8) ||
1677 !strncmp(con->uri, "/help", 5) ||
1678 !strncmp(con->uri, "/jobs", 5))
1679 {
1680 /*
1681 * CGI output...
1682 */
1683
1684 httpClearFields(con->http);
1685
1686 if (!cupsdSendHeader(con, HTTP_STATUS_OK, "text/html", CUPSD_AUTH_NONE))
1687 {
1688 cupsdCloseClient(con);
1689 return;
1690 }
1691
1692 cupsdLogRequest(con, HTTP_STATUS_OK);
1693 }
1694 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1695 (strchr(con->uri + 12, '/') ||
1696 strlen(con->uri) == 12)) ||
1697 (!strncmp(con->uri, "/admin/log/", 11) &&
1698 (strchr(con->uri + 11, '/') ||
1699 strlen(con->uri) == 11)))
1700 {
1701 /*
1702 * HEAD can only be done to configuration files under
1703 * /admin/conf...
1704 */
1705
1706 cupsdLogClient(con, CUPSD_LOG_ERROR,
1707 "Request for subdirectory \"%s\".", con->uri);
1708
1709 if (!cupsdSendError(con, HTTP_STATUS_FORBIDDEN, CUPSD_AUTH_NONE))
1710 {
1711 cupsdCloseClient(con);
1712 return;
1713 }
1714
1715 cupsdLogRequest(con, HTTP_STATUS_FORBIDDEN);
1716 break;
1717 }
1718 else if ((filename = get_file(con, &filestats, buf,
1719 sizeof(buf))) == NULL)
1720 {
1721 httpClearFields(con->http);
1722
1723 if (!cupsdSendHeader(con, HTTP_STATUS_NOT_FOUND, "text/html",
1724 CUPSD_AUTH_NONE))
1725 {
1726 cupsdCloseClient(con);
1727 return;
1728 }
1729
1730 cupsdLogRequest(con, HTTP_STATUS_NOT_FOUND);
1731 }
1732 else if (!check_if_modified(con, &filestats))
1733 {
1734 if (!cupsdSendError(con, HTTP_STATUS_NOT_MODIFIED, CUPSD_AUTH_NONE))
1735 {
1736 cupsdCloseClient(con);
1737 return;
1738 }
1739
1740 cupsdLogRequest(con, HTTP_STATUS_NOT_MODIFIED);
1741 }
1742 else
1743 {
1744 /*
1745 * Serve a file...
1746 */
1747
1748 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1749 if (type == NULL)
1750 strlcpy(line, "text/plain", sizeof(line));
1751 else
1752 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1753
1754 httpClearFields(con->http);
1755
1756 httpSetField(con->http, HTTP_FIELD_LAST_MODIFIED,
1757 httpGetDateString(filestats.st_mtime));
1758 httpSetLength(con->http, (size_t)filestats.st_size);
1759
1760 if (!cupsdSendHeader(con, HTTP_STATUS_OK, line, CUPSD_AUTH_NONE))
1761 {
1762 cupsdCloseClient(con);
1763 return;
1764 }
1765
1766 cupsdLogRequest(con, HTTP_STATUS_OK);
1767 }
1768 break;
1769
1770 default :
1771 break; /* Anti-compiler-warning-code */
1772 }
1773 }
1774 }
1775
1776 /*
1777 * Handle any incoming data...
1778 */
1779
1780 switch (httpGetState(con->http))
1781 {
1782 case HTTP_STATE_PUT_RECV :
1783 do
1784 {
1785 if ((bytes = httpRead2(con->http, line, sizeof(line))) < 0)
1786 {
1787 if (httpError(con->http) && httpError(con->http) != EPIPE)
1788 cupsdLogClient(con, CUPSD_LOG_DEBUG,
1789 "HTTP_STATE_PUT_RECV Closing for error %d (%s)",
1790 httpError(con->http), strerror(httpError(con->http)));
1791 else
1792 cupsdLogClient(con, CUPSD_LOG_DEBUG,
1793 "HTTP_STATE_PUT_RECV Closing on EOF.");
1794
1795 cupsdCloseClient(con);
1796 return;
1797 }
1798 else if (bytes > 0)
1799 {
1800 con->bytes += bytes;
1801
1802 if (MaxRequestSize > 0 && con->bytes > MaxRequestSize)
1803 {
1804 close(con->file);
1805 con->file = -1;
1806 unlink(con->filename);
1807 cupsdClearString(&con->filename);
1808
1809 if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1810 {
1811 cupsdCloseClient(con);
1812 return;
1813 }
1814 }
1815
1816 if (write(con->file, line, (size_t)bytes) < bytes)
1817 {
1818 cupsdLogClient(con, CUPSD_LOG_ERROR,
1819 "Unable to write %d bytes to \"%s\": %s", bytes,
1820 con->filename, strerror(errno));
1821
1822 close(con->file);
1823 con->file = -1;
1824 unlink(con->filename);
1825 cupsdClearString(&con->filename);
1826
1827 if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1828 {
1829 cupsdCloseClient(con);
1830 return;
1831 }
1832 }
1833 }
1834 else
1835 break;
1836 }
1837 while (httpGetState(con->http) == HTTP_STATE_PUT_RECV && httpGetReady(con->http));
1838
1839 if (httpGetState(con->http) == HTTP_STATE_STATUS)
1840 {
1841 /*
1842 * End of file, see how big it is...
1843 */
1844
1845 fstat(con->file, &filestats);
1846
1847 close(con->file);
1848 con->file = -1;
1849
1850 if (filestats.st_size > MaxRequestSize &&
1851 MaxRequestSize > 0)
1852 {
1853 /*
1854 * Request is too big; remove it and send an error...
1855 */
1856
1857 unlink(con->filename);
1858 cupsdClearString(&con->filename);
1859
1860 if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1861 {
1862 cupsdCloseClient(con);
1863 return;
1864 }
1865 }
1866
1867 /*
1868 * Install the configuration file...
1869 */
1870
1871 status = install_cupsd_conf(con);
1872
1873 /*
1874 * Return the status to the client...
1875 */
1876
1877 if (!cupsdSendError(con, status, CUPSD_AUTH_NONE))
1878 {
1879 cupsdCloseClient(con);
1880 return;
1881 }
1882 }
1883 break;
1884
1885 case HTTP_STATE_POST_RECV :
1886 do
1887 {
1888 if (con->request && con->file < 0)
1889 {
1890 /*
1891 * Grab any request data from the connection...
1892 */
1893
1894 if (!httpWait(con->http, 0))
1895 return;
1896
1897 if ((ipp_state = ippRead(con->http, con->request)) == IPP_STATE_ERROR)
1898 {
1899 cupsdLogClient(con, CUPSD_LOG_ERROR, "IPP read error: %s",
1900 cupsLastErrorString());
1901
1902 cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE);
1903 cupsdCloseClient(con);
1904 return;
1905 }
1906 else if (ipp_state != IPP_STATE_DATA)
1907 {
1908 if (httpGetState(con->http) == HTTP_STATE_POST_SEND)
1909 {
1910 cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE);
1911 cupsdCloseClient(con);
1912 return;
1913 }
1914
1915 if (httpGetReady(con->http))
1916 continue;
1917 break;
1918 }
1919 else
1920 {
1921 cupsdLogClient(con, CUPSD_LOG_DEBUG, "%d.%d %s %d",
1922 con->request->request.op.version[0],
1923 con->request->request.op.version[1],
1924 ippOpString(con->request->request.op.operation_id),
1925 con->request->request.op.request_id);
1926 con->bytes += (off_t)ippLength(con->request);
1927 }
1928 }
1929
1930 if (con->file < 0 && httpGetState(con->http) != HTTP_STATE_POST_SEND)
1931 {
1932 /*
1933 * Create a file as needed for the request data...
1934 */
1935
1936 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot,
1937 request_id ++);
1938 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
1939
1940 if (con->file < 0)
1941 {
1942 cupsdLogClient(con, CUPSD_LOG_ERROR,
1943 "Unable to create request file \"%s\": %s",
1944 con->filename, strerror(errno));
1945
1946 if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1947 {
1948 cupsdCloseClient(con);
1949 return;
1950 }
1951 }
1952
1953 fchmod(con->file, 0640);
1954 fchown(con->file, RunUser, Group);
1955 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
1956 }
1957
1958 if (httpGetState(con->http) != HTTP_STATE_POST_SEND)
1959 {
1960 if (!httpWait(con->http, 0))
1961 return;
1962 else if ((bytes = httpRead2(con->http, line, sizeof(line))) < 0)
1963 {
1964 if (httpError(con->http) && httpError(con->http) != EPIPE)
1965 cupsdLogClient(con, CUPSD_LOG_DEBUG,
1966 "HTTP_STATE_POST_SEND Closing for error %d (%s)",
1967 httpError(con->http), strerror(httpError(con->http)));
1968 else
1969 cupsdLogClient(con, CUPSD_LOG_DEBUG,
1970 "HTTP_STATE_POST_SEND Closing on EOF.");
1971
1972 cupsdCloseClient(con);
1973 return;
1974 }
1975 else if (bytes > 0)
1976 {
1977 con->bytes += bytes;
1978
1979 if (MaxRequestSize > 0 && con->bytes > MaxRequestSize)
1980 {
1981 close(con->file);
1982 con->file = -1;
1983 unlink(con->filename);
1984 cupsdClearString(&con->filename);
1985
1986 if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1987 {
1988 cupsdCloseClient(con);
1989 return;
1990 }
1991 }
1992
1993 if (write(con->file, line, (size_t)bytes) < bytes)
1994 {
1995 cupsdLogClient(con, CUPSD_LOG_ERROR,
1996 "Unable to write %d bytes to \"%s\": %s",
1997 bytes, con->filename, strerror(errno));
1998
1999 close(con->file);
2000 con->file = -1;
2001 unlink(con->filename);
2002 cupsdClearString(&con->filename);
2003
2004 if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE,
2005 CUPSD_AUTH_NONE))
2006 {
2007 cupsdCloseClient(con);
2008 return;
2009 }
2010 }
2011 }
2012 else if (httpGetState(con->http) == HTTP_STATE_POST_RECV)
2013 return;
2014 else if (httpGetState(con->http) != HTTP_STATE_POST_SEND)
2015 {
2016 cupsdLogClient(con, CUPSD_LOG_DEBUG,
2017 "Closing on unexpected state %s.",
2018 httpStateString(httpGetState(con->http)));
2019 cupsdCloseClient(con);
2020 return;
2021 }
2022 }
2023 }
2024 while (httpGetState(con->http) == HTTP_STATE_POST_RECV && httpGetReady(con->http));
2025
2026 if (httpGetState(con->http) == HTTP_STATE_POST_SEND)
2027 {
2028 if (con->file >= 0)
2029 {
2030 fstat(con->file, &filestats);
2031
2032 close(con->file);
2033 con->file = -1;
2034
2035 if (filestats.st_size > MaxRequestSize &&
2036 MaxRequestSize > 0)
2037 {
2038 /*
2039 * Request is too big; remove it and send an error...
2040 */
2041
2042 unlink(con->filename);
2043 cupsdClearString(&con->filename);
2044
2045 if (con->request)
2046 {
2047 /*
2048 * Delete any IPP request data...
2049 */
2050
2051 ippDelete(con->request);
2052 con->request = NULL;
2053 }
2054
2055 if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2056 {
2057 cupsdCloseClient(con);
2058 return;
2059 }
2060 }
2061 else if (filestats.st_size == 0)
2062 {
2063 /*
2064 * Don't allow empty file...
2065 */
2066
2067 unlink(con->filename);
2068 cupsdClearString(&con->filename);
2069 }
2070
2071 if (con->command)
2072 {
2073 if (!cupsdSendCommand(con, con->command, con->options, 0))
2074 {
2075 if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE))
2076 {
2077 cupsdCloseClient(con);
2078 return;
2079 }
2080 }
2081 else
2082 cupsdLogRequest(con, HTTP_STATUS_OK);
2083 }
2084 }
2085
2086 if (con->request)
2087 {
2088 cupsdProcessIPPRequest(con);
2089
2090 if (con->filename)
2091 {
2092 unlink(con->filename);
2093 cupsdClearString(&con->filename);
2094 }
2095
2096 return;
2097 }
2098 }
2099 break;
2100
2101 default :
2102 break; /* Anti-compiler-warning-code */
2103 }
2104
2105 if (httpGetState(con->http) == HTTP_STATE_WAITING)
2106 {
2107 if (!httpGetKeepAlive(con->http))
2108 {
2109 cupsdLogClient(con, CUPSD_LOG_DEBUG,
2110 "Closing because Keep-Alive is disabled.");
2111 cupsdCloseClient(con);
2112 }
2113 else
2114 {
2115 cupsArrayRemove(ActiveClients, con);
2116 cupsdSetBusyState();
2117 }
2118 }
2119 }
2120
2121
2122 /*
2123 * 'cupsdSendCommand()' - Send output from a command via HTTP.
2124 */
2125
2126 int /* O - 1 on success, 0 on failure */
2127 cupsdSendCommand(
2128 cupsd_client_t *con, /* I - Client connection */
2129 char *command, /* I - Command to run */
2130 char *options, /* I - Command-line options */
2131 int root) /* I - Run as root? */
2132 {
2133 int fd; /* Standard input file descriptor */
2134
2135
2136 if (con->filename)
2137 {
2138 fd = open(con->filename, O_RDONLY);
2139
2140 if (fd < 0)
2141 {
2142 cupsdLogClient(con, CUPSD_LOG_ERROR,
2143 "Unable to open \"%s\" for reading: %s",
2144 con->filename ? con->filename : "/dev/null",
2145 strerror(errno));
2146 return (0);
2147 }
2148
2149 fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
2150 }
2151 else
2152 fd = -1;
2153
2154 con->pipe_pid = pipe_command(con, fd, &(con->file), command, options, root);
2155 con->pipe_status = HTTP_STATUS_OK;
2156
2157 httpClearFields(con->http);
2158
2159 if (fd >= 0)
2160 close(fd);
2161
2162 cupsdLogClient(con, CUPSD_LOG_INFO, "Started \"%s\" (pid=%d, file=%d)",
2163 command, con->pipe_pid, con->file);
2164
2165 if (con->pipe_pid == 0)
2166 return (0);
2167
2168 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2169
2170 cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con);
2171
2172 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for CGI data.");
2173
2174 con->sent_header = 0;
2175 con->file_ready = 0;
2176 con->got_fields = 0;
2177 con->header_used = 0;
2178
2179 return (1);
2180 }
2181
2182
2183 /*
2184 * 'cupsdSendError()' - Send an error message via HTTP.
2185 */
2186
2187 int /* O - 1 if successful, 0 otherwise */
2188 cupsdSendError(cupsd_client_t *con, /* I - Connection */
2189 http_status_t code, /* I - Error code */
2190 int auth_type)/* I - Authentication type */
2191 {
2192 char location[HTTP_MAX_VALUE]; /* Location field */
2193
2194
2195 cupsdLogClient(con, CUPSD_LOG_DEBUG2, "cupsdSendError code=%d, auth_type=%d",
2196 code, auth_type);
2197
2198 #ifdef HAVE_SSL
2199 /*
2200 * Force client to upgrade for authentication if that is how the
2201 * server is configured...
2202 */
2203
2204 if (code == HTTP_STATUS_UNAUTHORIZED &&
2205 DefaultEncryption == HTTP_ENCRYPTION_REQUIRED &&
2206 _cups_strcasecmp(httpGetHostname(con->http, NULL, 0), "localhost") &&
2207 !httpIsEncrypted(con->http))
2208 {
2209 code = HTTP_STATUS_UPGRADE_REQUIRED;
2210 }
2211 #endif /* HAVE_SSL */
2212
2213 /*
2214 * Put the request in the access_log file...
2215 */
2216
2217 cupsdLogRequest(con, code);
2218
2219 /*
2220 * To work around bugs in some proxies, don't use Keep-Alive for some
2221 * error messages...
2222 *
2223 * Kerberos authentication doesn't work without Keep-Alive, so
2224 * never disable it in that case.
2225 */
2226
2227 strlcpy(location, httpGetField(con->http, HTTP_FIELD_LOCATION), sizeof(location));
2228
2229 httpClearFields(con->http);
2230
2231 httpSetField(con->http, HTTP_FIELD_LOCATION, location);
2232
2233 if (code >= HTTP_STATUS_BAD_REQUEST && con->type != CUPSD_AUTH_NEGOTIATE)
2234 httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF);
2235
2236 if (httpGetVersion(con->http) >= HTTP_VERSION_1_1 &&
2237 httpGetKeepAlive(con->http) == HTTP_KEEPALIVE_OFF)
2238 httpSetField(con->http, HTTP_FIELD_CONNECTION, "close");
2239
2240 if (code >= HTTP_STATUS_BAD_REQUEST)
2241 {
2242 /*
2243 * Send a human-readable error message.
2244 */
2245
2246 char message[4096], /* Message for user */
2247 urltext[1024], /* URL redirection text */
2248 redirect[1024]; /* Redirection link */
2249 const char *text; /* Status-specific text */
2250
2251
2252 redirect[0] = '\0';
2253
2254 if (code == HTTP_STATUS_UNAUTHORIZED)
2255 text = _cupsLangString(con->language,
2256 _("Enter your username and password or the "
2257 "root username and password to access this "
2258 "page. If you are using Kerberos authentication, "
2259 "make sure you have a valid Kerberos ticket."));
2260 else if (code == HTTP_STATUS_UPGRADE_REQUIRED)
2261 {
2262 text = urltext;
2263
2264 snprintf(urltext, sizeof(urltext),
2265 _cupsLangString(con->language,
2266 _("You must access this page using the URL "
2267 "<A HREF=\"https://%s:%d%s\">"
2268 "https://%s:%d%s</A>.")),
2269 con->servername, con->serverport, con->uri,
2270 con->servername, con->serverport, con->uri);
2271
2272 snprintf(redirect, sizeof(redirect),
2273 "<META HTTP-EQUIV=\"Refresh\" "
2274 "CONTENT=\"3;URL=https://%s:%d%s\">\n",
2275 con->servername, con->serverport, con->uri);
2276 }
2277 else if (code == HTTP_STATUS_CUPS_WEBIF_DISABLED)
2278 text = _cupsLangString(con->language,
2279 _("The web interface is currently disabled. Run "
2280 "\"cupsctl WebInterface=yes\" to enable it."));
2281 else
2282 text = "";
2283
2284 snprintf(message, sizeof(message),
2285 "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" "
2286 "\"http://www.w3.org/TR/html4/loose.dtd\">\n"
2287 "<HTML>\n"
2288 "<HEAD>\n"
2289 "\t<META HTTP-EQUIV=\"Content-Type\" "
2290 "CONTENT=\"text/html; charset=utf-8\">\n"
2291 "\t<TITLE>%s - " CUPS_SVERSION "</TITLE>\n"
2292 "\t<LINK REL=\"STYLESHEET\" TYPE=\"text/css\" "
2293 "HREF=\"/cups.css\">\n"
2294 "%s"
2295 "</HEAD>\n"
2296 "<BODY>\n"
2297 "<H1>%s</H1>\n"
2298 "<P>%s</P>\n"
2299 "</BODY>\n"
2300 "</HTML>\n",
2301 _httpStatus(con->language, code), redirect,
2302 _httpStatus(con->language, code), text);
2303
2304 /*
2305 * Send an error message back to the client. If the error code is a
2306 * 400 or 500 series, make sure the message contains some text, too!
2307 */
2308
2309 size_t length = strlen(message); /* Length of message */
2310
2311 httpSetLength(con->http, length);
2312
2313 if (!cupsdSendHeader(con, code, "text/html", auth_type))
2314 return (0);
2315
2316 if (httpWrite2(con->http, message, length) < 0)
2317 return (0);
2318
2319 if (httpFlushWrite(con->http) < 0)
2320 return (0);
2321 }
2322 else
2323 {
2324 httpSetField(con->http, HTTP_FIELD_CONTENT_LENGTH, "0");
2325
2326 if (!cupsdSendHeader(con, code, NULL, auth_type))
2327 return (0);
2328 }
2329
2330 return (1);
2331 }
2332
2333
2334 /*
2335 * 'cupsdSendHeader()' - Send an HTTP request.
2336 */
2337
2338 int /* O - 1 on success, 0 on failure */
2339 cupsdSendHeader(
2340 cupsd_client_t *con, /* I - Client to send to */
2341 http_status_t code, /* I - HTTP status code */
2342 char *type, /* I - MIME type of document */
2343 int auth_type) /* I - Type of authentication */
2344 {
2345 char auth_str[1024]; /* Authorization string */
2346
2347
2348 cupsdLogClient(con, CUPSD_LOG_DEBUG, "cupsdSendHeader: code=%d, type=\"%s\", auth_type=%d", code, type, auth_type);
2349
2350 /*
2351 * Send the HTTP status header...
2352 */
2353
2354 if (code == HTTP_STATUS_CUPS_WEBIF_DISABLED)
2355 {
2356 /*
2357 * Treat our special "web interface is disabled" status as "200 OK" for web
2358 * browsers.
2359 */
2360
2361 code = HTTP_STATUS_OK;
2362 }
2363
2364 if (ServerHeader)
2365 httpSetField(con->http, HTTP_FIELD_SERVER, ServerHeader);
2366
2367 if (code == HTTP_STATUS_METHOD_NOT_ALLOWED)
2368 httpSetField(con->http, HTTP_FIELD_ALLOW, "GET, HEAD, OPTIONS, POST, PUT");
2369
2370 if (code == HTTP_STATUS_UNAUTHORIZED)
2371 {
2372 if (auth_type == CUPSD_AUTH_NONE)
2373 {
2374 if (!con->best || con->best->type <= CUPSD_AUTH_NONE)
2375 auth_type = cupsdDefaultAuthType();
2376 else
2377 auth_type = con->best->type;
2378 }
2379
2380 auth_str[0] = '\0';
2381
2382 if (auth_type == CUPSD_AUTH_BASIC)
2383 strlcpy(auth_str, "Basic realm=\"CUPS\"", sizeof(auth_str));
2384 #ifdef HAVE_GSSAPI
2385 else if (auth_type == CUPSD_AUTH_NEGOTIATE)
2386 {
2387 # ifdef AF_LOCAL
2388 if (httpAddrFamily(httpGetAddress(con->http)) == AF_LOCAL)
2389 strlcpy(auth_str, "Basic realm=\"CUPS\"", sizeof(auth_str));
2390 else
2391 # endif /* AF_LOCAL */
2392 strlcpy(auth_str, "Negotiate", sizeof(auth_str));
2393 }
2394 #endif /* HAVE_GSSAPI */
2395
2396 if (con->best && auth_type != CUPSD_AUTH_NEGOTIATE &&
2397 !_cups_strcasecmp(httpGetHostname(con->http, NULL, 0), "localhost"))
2398 {
2399 /*
2400 * Add a "trc" (try root certification) parameter for local non-Kerberos
2401 * requests when the request requires system group membership - then the
2402 * client knows the root certificate can/should be used.
2403 *
2404 * Also, for OS X we also look for @AUTHKEY and add an "authkey"
2405 * parameter as needed...
2406 */
2407
2408 char *name, /* Current user name */
2409 *auth_key; /* Auth key buffer */
2410 size_t auth_size; /* Size of remaining buffer */
2411
2412 auth_key = auth_str + strlen(auth_str);
2413 auth_size = sizeof(auth_str) - (size_t)(auth_key - auth_str);
2414
2415 for (name = (char *)cupsArrayFirst(con->best->names);
2416 name;
2417 name = (char *)cupsArrayNext(con->best->names))
2418 {
2419 #ifdef HAVE_AUTHORIZATION_H
2420 if (!_cups_strncasecmp(name, "@AUTHKEY(", 9))
2421 {
2422 snprintf(auth_key, auth_size, ", authkey=\"%s\"", name + 9);
2423 /* end parenthesis is stripped in conf.c */
2424 break;
2425 }
2426 else
2427 #endif /* HAVE_AUTHORIZATION_H */
2428 if (!_cups_strcasecmp(name, "@SYSTEM"))
2429 {
2430 #ifdef HAVE_AUTHORIZATION_H
2431 if (SystemGroupAuthKey)
2432 snprintf(auth_key, auth_size,
2433 ", authkey=\"%s\"",
2434 SystemGroupAuthKey);
2435 else
2436 #else
2437 strlcpy(auth_key, ", trc=\"y\"", auth_size);
2438 #endif /* HAVE_AUTHORIZATION_H */
2439 break;
2440 }
2441 }
2442 }
2443
2444 if (auth_str[0])
2445 {
2446 cupsdLogClient(con, CUPSD_LOG_DEBUG, "WWW-Authenticate: %s", auth_str);
2447
2448 httpSetField(con->http, HTTP_FIELD_WWW_AUTHENTICATE, auth_str);
2449 }
2450 }
2451
2452 if (con->language && strcmp(con->language->language, "C"))
2453 httpSetField(con->http, HTTP_FIELD_CONTENT_LANGUAGE, con->language->language);
2454
2455 if (type)
2456 {
2457 if (!strcmp(type, "text/html"))
2458 httpSetField(con->http, HTTP_FIELD_CONTENT_TYPE, "text/html; charset=utf-8");
2459 else
2460 httpSetField(con->http, HTTP_FIELD_CONTENT_TYPE, type);
2461 }
2462
2463 return (!httpWriteResponse(con->http, code));
2464 }
2465
2466
2467 /*
2468 * 'cupsdUpdateCGI()' - Read status messages from CGI scripts and programs.
2469 */
2470
2471 void
2472 cupsdUpdateCGI(void)
2473 {
2474 char *ptr, /* Pointer to end of line in buffer */
2475 message[1024]; /* Pointer to message text */
2476 int loglevel; /* Log level for message */
2477
2478
2479 while ((ptr = cupsdStatBufUpdate(CGIStatusBuffer, &loglevel,
2480 message, sizeof(message))) != NULL)
2481 {
2482 if (loglevel == CUPSD_LOG_INFO)
2483 cupsdLogMessage(CUPSD_LOG_INFO, "%s", message);
2484
2485 if (!strchr(CGIStatusBuffer->buffer, '\n'))
2486 break;
2487 }
2488
2489 if (ptr == NULL && !CGIStatusBuffer->bufused)
2490 {
2491 /*
2492 * Fatal error on pipe - should never happen!
2493 */
2494
2495 cupsdLogMessage(CUPSD_LOG_CRIT,
2496 "cupsdUpdateCGI: error reading from CGI error pipe - %s",
2497 strerror(errno));
2498 }
2499 }
2500
2501
2502 /*
2503 * 'cupsdWriteClient()' - Write data to a client as needed.
2504 */
2505
2506 void
2507 cupsdWriteClient(cupsd_client_t *con) /* I - Client connection */
2508 {
2509 int bytes, /* Number of bytes written */
2510 field_col; /* Current column */
2511 char *bufptr, /* Pointer into buffer */
2512 *bufend; /* Pointer to end of buffer */
2513 ipp_state_t ipp_state; /* IPP state value */
2514
2515
2516 cupsdLogClient(con, CUPSD_LOG_DEBUG, "con->http=%p", con->http);
2517 cupsdLogClient(con, CUPSD_LOG_DEBUG,
2518 "cupsdWriteClient "
2519 "error=%d, "
2520 "used=%d, "
2521 "state=%s, "
2522 "data_encoding=HTTP_ENCODING_%s, "
2523 "data_remaining=" CUPS_LLFMT ", "
2524 "response=%p(%s), "
2525 "pipe_pid=%d, "
2526 "file=%d",
2527 httpError(con->http), (int)httpGetReady(con->http),
2528 httpStateString(httpGetState(con->http)),
2529 httpIsChunked(con->http) ? "CHUNKED" : "LENGTH",
2530 CUPS_LLCAST httpGetLength2(con->http),
2531 con->response,
2532 con->response ? ippStateString(ippGetState(con->request)) : "",
2533 con->pipe_pid, con->file);
2534
2535 if (httpGetState(con->http) != HTTP_STATE_GET_SEND &&
2536 httpGetState(con->http) != HTTP_STATE_POST_SEND)
2537 {
2538 /*
2539 * If we get called in the wrong state, then something went wrong with the
2540 * connection and we need to shut it down...
2541 */
2542
2543 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing on unexpected HTTP write state %s.",
2544 httpStateString(httpGetState(con->http)));
2545 cupsdCloseClient(con);
2546 return;
2547 }
2548
2549 if (con->pipe_pid)
2550 {
2551 /*
2552 * Make sure we select on the CGI output...
2553 */
2554
2555 cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con);
2556
2557 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for CGI data.");
2558
2559 if (!con->file_ready)
2560 {
2561 /*
2562 * Try again later when there is CGI output available...
2563 */
2564
2565 cupsdRemoveSelect(httpGetFd(con->http));
2566 return;
2567 }
2568
2569 con->file_ready = 0;
2570 }
2571
2572 bytes = (ssize_t)(sizeof(con->header) - (size_t)con->header_used);
2573
2574 if (!con->pipe_pid && bytes > (ssize_t)httpGetRemaining(con->http))
2575 {
2576 /*
2577 * Limit GET bytes to original size of file (STR #3265)...
2578 */
2579
2580 bytes = (ssize_t)httpGetRemaining(con->http);
2581 }
2582
2583 if (con->response && con->response->state != IPP_STATE_DATA)
2584 {
2585 size_t wused = httpGetPending(con->http); /* Previous write buffer use */
2586
2587 do
2588 {
2589 /*
2590 * Write a single attribute or the IPP message header...
2591 */
2592
2593 ipp_state = ippWrite(con->http, con->response);
2594
2595 /*
2596 * If the write buffer has been flushed, stop buffering up attributes...
2597 */
2598
2599 if (httpGetPending(con->http) <= wused)
2600 break;
2601 }
2602 while (ipp_state != IPP_STATE_DATA && ipp_state != IPP_STATE_ERROR);
2603
2604 cupsdLogClient(con, CUPSD_LOG_DEBUG,
2605 "Writing IPP response, ipp_state=%s, old "
2606 "wused=" CUPS_LLFMT ", new wused=" CUPS_LLFMT,
2607 ippStateString(ipp_state),
2608 CUPS_LLCAST wused, CUPS_LLCAST httpGetPending(con->http));
2609
2610 if (httpGetPending(con->http) > 0)
2611 httpFlushWrite(con->http);
2612
2613 bytes = ipp_state != IPP_STATE_ERROR &&
2614 (con->file >= 0 || ipp_state != IPP_STATE_DATA);
2615
2616 cupsdLogClient(con, CUPSD_LOG_DEBUG,
2617 "bytes=%d, http_state=%d, data_remaining=" CUPS_LLFMT,
2618 (int)bytes, httpGetState(con->http),
2619 CUPS_LLCAST httpGetLength2(con->http));
2620 }
2621 else if ((bytes = read(con->file, con->header + con->header_used, (size_t)bytes)) > 0)
2622 {
2623 con->header_used += bytes;
2624
2625 if (con->pipe_pid && !con->got_fields)
2626 {
2627 /*
2628 * Inspect the data for Content-Type and other fields.
2629 */
2630
2631 for (bufptr = con->header, bufend = con->header + con->header_used,
2632 field_col = 0;
2633 !con->got_fields && bufptr < bufend;
2634 bufptr ++)
2635 {
2636 if (*bufptr == '\n')
2637 {
2638 /*
2639 * Send line to client...
2640 */
2641
2642 if (bufptr > con->header && bufptr[-1] == '\r')
2643 bufptr[-1] = '\0';
2644 *bufptr++ = '\0';
2645
2646 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Script header: %s", con->header);
2647
2648 if (!con->sent_header)
2649 {
2650 /*
2651 * Handle redirection and CGI status codes...
2652 */
2653
2654 http_field_t field; /* HTTP field */
2655 char *value = strchr(con->header, ':');
2656 /* Value of field */
2657
2658 if (value)
2659 {
2660 *value++ = '\0';
2661 while (isspace(*value & 255))
2662 value ++;
2663 }
2664
2665 field = httpFieldValue(con->header);
2666
2667 if (field != HTTP_FIELD_UNKNOWN && value)
2668 {
2669 httpSetField(con->http, field, value);
2670
2671 if (field == HTTP_FIELD_LOCATION)
2672 {
2673 con->pipe_status = HTTP_STATUS_SEE_OTHER;
2674 con->sent_header = 2;
2675 }
2676 else
2677 con->sent_header = 1;
2678 }
2679 else if (!_cups_strcasecmp(con->header, "Status") && value)
2680 {
2681 con->pipe_status = (http_status_t)atoi(value);
2682 con->sent_header = 2;
2683 }
2684 else if (!_cups_strcasecmp(con->header, "Set-Cookie") && value)
2685 {
2686 httpSetCookie(con->http, value);
2687 con->sent_header = 1;
2688 }
2689 }
2690
2691 /*
2692 * Update buffer...
2693 */
2694
2695 con->header_used -= bufptr - con->header;
2696
2697 if (con->header_used > 0)
2698 memmove(con->header, bufptr, (size_t)con->header_used);
2699
2700 bufptr = con->header - 1;
2701
2702 /*
2703 * See if the line was empty...
2704 */
2705
2706 if (field_col == 0)
2707 {
2708 con->got_fields = 1;
2709
2710 if (httpGetVersion(con->http) == HTTP_VERSION_1_1 &&
2711 !httpGetField(con->http, HTTP_FIELD_CONTENT_LENGTH)[0])
2712 httpSetLength(con->http, 0);
2713
2714 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Sending status %d for CGI.", con->pipe_status);
2715
2716 if (con->pipe_status == HTTP_STATUS_OK)
2717 {
2718 if (!cupsdSendHeader(con, con->pipe_status, NULL, CUPSD_AUTH_NONE))
2719 {
2720 cupsdCloseClient(con);
2721 return;
2722 }
2723 }
2724 else
2725 {
2726 if (!cupsdSendError(con, con->pipe_status, CUPSD_AUTH_NONE))
2727 {
2728 cupsdCloseClient(con);
2729 return;
2730 }
2731 }
2732 }
2733 else
2734 field_col = 0;
2735 }
2736 else if (*bufptr != '\r')
2737 field_col ++;
2738 }
2739
2740 if (!con->got_fields)
2741 return;
2742 }
2743
2744 if (con->header_used > 0)
2745 {
2746 if (httpWrite2(con->http, con->header, (size_t)con->header_used) < 0)
2747 {
2748 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing for error %d (%s)",
2749 httpError(con->http), strerror(httpError(con->http)));
2750 cupsdCloseClient(con);
2751 return;
2752 }
2753
2754 if (httpIsChunked(con->http))
2755 httpFlushWrite(con->http);
2756
2757 con->bytes += con->header_used;
2758
2759 if (httpGetState(con->http) == HTTP_STATE_WAITING)
2760 bytes = 0;
2761 else
2762 bytes = con->header_used;
2763
2764 con->header_used = 0;
2765 }
2766 }
2767
2768 if (bytes <= 0 ||
2769 (httpGetState(con->http) != HTTP_STATE_GET_SEND &&
2770 httpGetState(con->http) != HTTP_STATE_POST_SEND))
2771 {
2772 if (!con->sent_header && con->pipe_pid)
2773 cupsdSendError(con, HTTP_STATUS_SERVER_ERROR, CUPSD_AUTH_NONE);
2774 else
2775 {
2776 cupsdLogRequest(con, HTTP_STATUS_OK);
2777
2778 if (httpIsChunked(con->http) && (!con->pipe_pid || con->sent_header > 0))
2779 {
2780 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Sending 0-length chunk.");
2781
2782 if (httpWrite2(con->http, "", 0) < 0)
2783 {
2784 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing for error %d (%s)",
2785 httpError(con->http), strerror(httpError(con->http)));
2786 cupsdCloseClient(con);
2787 return;
2788 }
2789 }
2790
2791 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Flushing write buffer.");
2792 httpFlushWrite(con->http);
2793 cupsdLogClient(con, CUPSD_LOG_DEBUG, "New state is %s", httpStateString(httpGetState(con->http)));
2794 }
2795
2796 cupsdAddSelect(httpGetFd(con->http), (cupsd_selfunc_t)cupsdReadClient, NULL, con);
2797
2798 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for request.");
2799
2800 if (con->file >= 0)
2801 {
2802 cupsdRemoveSelect(con->file);
2803
2804 if (con->pipe_pid)
2805 cupsdEndProcess(con->pipe_pid, 0);
2806
2807 close(con->file);
2808 con->file = -1;
2809 con->pipe_pid = 0;
2810 }
2811
2812 if (con->filename)
2813 {
2814 unlink(con->filename);
2815 cupsdClearString(&con->filename);
2816 }
2817
2818 if (con->request)
2819 {
2820 ippDelete(con->request);
2821 con->request = NULL;
2822 }
2823
2824 if (con->response)
2825 {
2826 ippDelete(con->response);
2827 con->response = NULL;
2828 }
2829
2830 cupsdClearString(&con->command);
2831 cupsdClearString(&con->options);
2832 cupsdClearString(&con->query_string);
2833
2834 if (!httpGetKeepAlive(con->http))
2835 {
2836 cupsdLogClient(con, CUPSD_LOG_DEBUG,
2837 "Closing because Keep-Alive is disabled.");
2838 cupsdCloseClient(con);
2839 return;
2840 }
2841 else
2842 {
2843 cupsArrayRemove(ActiveClients, con);
2844 cupsdSetBusyState();
2845 }
2846 }
2847 }
2848
2849
2850 /*
2851 * 'check_if_modified()' - Decode an "If-Modified-Since" line.
2852 */
2853
2854 static int /* O - 1 if modified since */
2855 check_if_modified(
2856 cupsd_client_t *con, /* I - Client connection */
2857 struct stat *filestats) /* I - File information */
2858 {
2859 const char *ptr; /* Pointer into field */
2860 time_t date; /* Time/date value */
2861 off_t size; /* Size/length value */
2862
2863
2864 size = 0;
2865 date = 0;
2866 ptr = httpGetField(con->http, HTTP_FIELD_IF_MODIFIED_SINCE);
2867
2868 if (*ptr == '\0')
2869 return (1);
2870
2871 cupsdLogClient(con, CUPSD_LOG_DEBUG2,
2872 "check_if_modified "
2873 "filestats=%p(" CUPS_LLFMT ", %d)) If-Modified-Since=\"%s\"",
2874 filestats, CUPS_LLCAST filestats->st_size,
2875 (int)filestats->st_mtime, ptr);
2876
2877 while (*ptr != '\0')
2878 {
2879 while (isspace(*ptr) || *ptr == ';')
2880 ptr ++;
2881
2882 if (_cups_strncasecmp(ptr, "length=", 7) == 0)
2883 {
2884 ptr += 7;
2885 size = strtoll(ptr, NULL, 10);
2886
2887 while (isdigit(*ptr))
2888 ptr ++;
2889 }
2890 else if (isalpha(*ptr))
2891 {
2892 date = httpGetDateTime(ptr);
2893 while (*ptr != '\0' && *ptr != ';')
2894 ptr ++;
2895 }
2896 else
2897 ptr ++;
2898 }
2899
2900 return ((size != filestats->st_size && size != 0) ||
2901 (date < filestats->st_mtime && date != 0) ||
2902 (size == 0 && date == 0));
2903 }
2904
2905
2906 /*
2907 * 'compare_clients()' - Compare two client connections.
2908 */
2909
2910 static int /* O - Result of comparison */
2911 compare_clients(cupsd_client_t *a, /* I - First client */
2912 cupsd_client_t *b, /* I - Second client */
2913 void *data) /* I - User data (not used) */
2914 {
2915 (void)data;
2916
2917 if (a == b)
2918 return (0);
2919 else if (a < b)
2920 return (-1);
2921 else
2922 return (1);
2923 }
2924
2925
2926 #ifdef HAVE_SSL
2927 /*
2928 * 'cupsd_start_tls()' - Start encryption on a connection.
2929 */
2930
2931 static int /* O - 0 on success, -1 on error */
2932 cupsd_start_tls(cupsd_client_t *con, /* I - Client connection */
2933 http_encryption_t e) /* I - Encryption mode */
2934 {
2935 if (httpEncryption(con->http, e))
2936 {
2937 cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to encrypt connection: %s",
2938 cupsLastErrorString());
2939 return (-1);
2940 }
2941
2942 cupsdLogClient(con, CUPSD_LOG_INFO, "Connection now encrypted.");
2943 return (0);
2944 }
2945 #endif /* HAVE_SSL */
2946
2947
2948 /*
2949 * 'get_file()' - Get a filename and state info.
2950 */
2951
2952 static char * /* O - Real filename */
2953 get_file(cupsd_client_t *con, /* I - Client connection */
2954 struct stat *filestats, /* O - File information */
2955 char *filename, /* IO - Filename buffer */
2956 size_t len) /* I - Buffer length */
2957 {
2958 int status; /* Status of filesystem calls */
2959 char *ptr; /* Pointer info filename */
2960 size_t plen; /* Remaining length after pointer */
2961 char language[7]; /* Language subdirectory, if any */
2962 int perm_check = 1; /* Do permissions check? */
2963
2964
2965 /*
2966 * Figure out the real filename...
2967 */
2968
2969 language[0] = '\0';
2970
2971 if (!strncmp(con->uri, "/ppd/", 5) && !strchr(con->uri + 5, '/'))
2972 {
2973 snprintf(filename, len, "%s%s", ServerRoot, con->uri);
2974
2975 perm_check = 0;
2976 }
2977 else if (!strncmp(con->uri, "/icons/", 7) && !strchr(con->uri + 7, '/'))
2978 {
2979 snprintf(filename, len, "%s/%s", CacheDir, con->uri + 7);
2980 if (access(filename, F_OK) < 0)
2981 snprintf(filename, len, "%s/images/generic.png", DocumentRoot);
2982
2983 perm_check = 0;
2984 }
2985 else if (!strncmp(con->uri, "/rss/", 5) && !strchr(con->uri + 5, '/'))
2986 snprintf(filename, len, "%s/rss/%s", CacheDir, con->uri + 5);
2987 else if (!strcmp(con->uri, "/admin/conf/cupsd.conf"))
2988 {
2989 strlcpy(filename, ConfigurationFile, len);
2990
2991 perm_check = 0;
2992 }
2993 else if (!strncmp(con->uri, "/admin/log/", 11))
2994 {
2995 if (!strncmp(con->uri + 11, "access_log", 10) && AccessLog[0] == '/')
2996 strlcpy(filename, AccessLog, len);
2997 else if (!strncmp(con->uri + 11, "error_log", 9) && ErrorLog[0] == '/')
2998 strlcpy(filename, ErrorLog, len);
2999 else if (!strncmp(con->uri + 11, "page_log", 8) && PageLog[0] == '/')
3000 strlcpy(filename, PageLog, len);
3001 else
3002 return (NULL);
3003
3004 perm_check = 0;
3005 }
3006 else if (con->language)
3007 {
3008 snprintf(language, sizeof(language), "/%s", con->language->language);
3009 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3010 }
3011 else
3012 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3013
3014 if ((ptr = strchr(filename, '?')) != NULL)
3015 *ptr = '\0';
3016
3017 /*
3018 * Grab the status for this language; if there isn't a language-specific file
3019 * then fallback to the default one...
3020 */
3021
3022 if ((status = lstat(filename, filestats)) != 0 && language[0] &&
3023 strncmp(con->uri, "/icons/", 7) &&
3024 strncmp(con->uri, "/ppd/", 5) &&
3025 strncmp(con->uri, "/rss/", 5) &&
3026 strncmp(con->uri, "/admin/conf/", 12) &&
3027 strncmp(con->uri, "/admin/log/", 11))
3028 {
3029 /*
3030 * Drop the country code...
3031 */
3032
3033 language[3] = '\0';
3034 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3035
3036 if ((ptr = strchr(filename, '?')) != NULL)
3037 *ptr = '\0';
3038
3039 if ((status = lstat(filename, filestats)) != 0)
3040 {
3041 /*
3042 * Drop the language prefix and try the root directory...
3043 */
3044
3045 language[0] = '\0';
3046 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3047
3048 if ((ptr = strchr(filename, '?')) != NULL)
3049 *ptr = '\0';
3050
3051 status = lstat(filename, filestats);
3052 }
3053 }
3054
3055 /*
3056 * If we've found a symlink, 404 the sucker to avoid disclosing information.
3057 */
3058
3059 if (!status && S_ISLNK(filestats->st_mode))
3060 {
3061 cupsdLogClient(con, CUPSD_LOG_INFO, "Symlinks such as \"%s\" are not allowed.", filename);
3062 return (NULL);
3063 }
3064
3065 /*
3066 * Similarly, if the file/directory does not have world read permissions, do
3067 * not allow access...
3068 */
3069
3070 if (!status && perm_check && !(filestats->st_mode & S_IROTH))
3071 {
3072 cupsdLogClient(con, CUPSD_LOG_INFO, "Files/directories such as \"%s\" must be world-readable.", filename);
3073 return (NULL);
3074 }
3075
3076 /*
3077 * If we've found a directory, get the index.html file instead...
3078 */
3079
3080 if (!status && S_ISDIR(filestats->st_mode))
3081 {
3082 /*
3083 * Make sure the URI ends with a slash...
3084 */
3085
3086 if (con->uri[strlen(con->uri) - 1] != '/')
3087 strlcat(con->uri, "/", sizeof(con->uri));
3088
3089 /*
3090 * Find the directory index file, trying every language...
3091 */
3092
3093 do
3094 {
3095 if (status && language[0])
3096 {
3097 /*
3098 * Try a different language subset...
3099 */
3100
3101 if (language[3])
3102 language[0] = '\0'; /* Strip country code */
3103 else
3104 language[0] = '\0'; /* Strip language */
3105 }
3106
3107 /*
3108 * Look for the index file...
3109 */
3110
3111 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3112
3113 if ((ptr = strchr(filename, '?')) != NULL)
3114 *ptr = '\0';
3115
3116 ptr = filename + strlen(filename);
3117 plen = len - (size_t)(ptr - filename);
3118
3119 strlcpy(ptr, "index.html", plen);
3120 status = lstat(filename, filestats);
3121
3122 #ifdef HAVE_JAVA
3123 if (status)
3124 {
3125 strlcpy(ptr, "index.class", plen);
3126 status = lstat(filename, filestats);
3127 }
3128 #endif /* HAVE_JAVA */
3129
3130 #ifdef HAVE_PERL
3131 if (status)
3132 {
3133 strlcpy(ptr, "index.pl", plen);
3134 status = lstat(filename, filestats);
3135 }
3136 #endif /* HAVE_PERL */
3137
3138 #ifdef HAVE_PHP
3139 if (status)
3140 {
3141 strlcpy(ptr, "index.php", plen);
3142 status = lstat(filename, filestats);
3143 }
3144 #endif /* HAVE_PHP */
3145
3146 #ifdef HAVE_PYTHON
3147 if (status)
3148 {
3149 strlcpy(ptr, "index.pyc", plen);
3150 status = lstat(filename, filestats);
3151 }
3152
3153 if (status)
3154 {
3155 strlcpy(ptr, "index.py", plen);
3156 status = lstat(filename, filestats);
3157 }
3158 #endif /* HAVE_PYTHON */
3159
3160 }
3161 while (status && language[0]);
3162
3163 /*
3164 * If we've found a symlink, 404 the sucker to avoid disclosing information.
3165 */
3166
3167 if (!status && S_ISLNK(filestats->st_mode))
3168 {
3169 cupsdLogClient(con, CUPSD_LOG_INFO, "Symlinks such as \"%s\" are not allowed.", filename);
3170 return (NULL);
3171 }
3172
3173 /*
3174 * Similarly, if the file/directory does not have world read permissions, do
3175 * not allow access...
3176 */
3177
3178 if (!status && perm_check && !(filestats->st_mode & S_IROTH))
3179 {
3180 cupsdLogClient(con, CUPSD_LOG_INFO, "Files/directories such as \"%s\" must be world-readable.", filename);
3181 return (NULL);
3182 }
3183 }
3184
3185 cupsdLogClient(con, CUPSD_LOG_DEBUG2, "get_file filestats=%p, filename=%p, len=" CUPS_LLFMT ", returning \"%s\".", filestats, filename, CUPS_LLCAST len, status ? "(null)" : filename);
3186
3187 if (status)
3188 return (NULL);
3189 else
3190 return (filename);
3191 }
3192
3193
3194 /*
3195 * 'install_cupsd_conf()' - Install a configuration file.
3196 */
3197
3198 static http_status_t /* O - Status */
3199 install_cupsd_conf(cupsd_client_t *con) /* I - Connection */
3200 {
3201 char filename[1024]; /* Configuration filename */
3202 cups_file_t *in, /* Input file */
3203 *out; /* Output file */
3204 char buffer[16384]; /* Copy buffer */
3205 ssize_t bytes; /* Number of bytes */
3206
3207
3208 /*
3209 * Open the request file...
3210 */
3211
3212 if ((in = cupsFileOpen(con->filename, "rb")) == NULL)
3213 {
3214 cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to open request file \"%s\": %s",
3215 con->filename, strerror(errno));
3216 return (HTTP_STATUS_SERVER_ERROR);
3217 }
3218
3219 /*
3220 * Open the new config file...
3221 */
3222
3223 if ((out = cupsdCreateConfFile(ConfigurationFile, ConfigFilePerm)) == NULL)
3224 {
3225 cupsFileClose(in);
3226 return (HTTP_STATUS_SERVER_ERROR);
3227 }
3228
3229 cupsdLogClient(con, CUPSD_LOG_INFO, "Installing config file \"%s\"...",
3230 ConfigurationFile);
3231
3232 /*
3233 * Copy from the request to the new config file...
3234 */
3235
3236 while ((bytes = cupsFileRead(in, buffer, sizeof(buffer))) > 0)
3237 if (cupsFileWrite(out, buffer, (size_t)bytes) < bytes)
3238 {
3239 cupsdLogClient(con, CUPSD_LOG_ERROR,
3240 "Unable to copy to config file \"%s\": %s",
3241 ConfigurationFile, strerror(errno));
3242
3243 cupsFileClose(in);
3244 cupsFileClose(out);
3245
3246 snprintf(filename, sizeof(filename), "%s.N", ConfigurationFile);
3247 cupsdUnlinkOrRemoveFile(filename);
3248
3249 return (HTTP_STATUS_SERVER_ERROR);
3250 }
3251
3252 /*
3253 * Close the files...
3254 */
3255
3256 cupsFileClose(in);
3257
3258 if (cupsdCloseCreatedConfFile(out, ConfigurationFile))
3259 return (HTTP_STATUS_SERVER_ERROR);
3260
3261 /*
3262 * Remove the request file...
3263 */
3264
3265 cupsdUnlinkOrRemoveFile(con->filename);
3266 cupsdClearString(&con->filename);
3267
3268 /*
3269 * Set the NeedReload flag...
3270 */
3271
3272 NeedReload = RELOAD_CUPSD;
3273 ReloadTime = time(NULL);
3274
3275 /*
3276 * Return that the file was created successfully...
3277 */
3278
3279 return (HTTP_STATUS_CREATED);
3280 }
3281
3282
3283 /*
3284 * 'is_cgi()' - Is the resource a CGI script/program?
3285 */
3286
3287 static int /* O - 1 = CGI, 0 = file */
3288 is_cgi(cupsd_client_t *con, /* I - Client connection */
3289 const char *filename, /* I - Real filename */
3290 struct stat *filestats, /* I - File information */
3291 mime_type_t *type) /* I - MIME type */
3292 {
3293 const char *options; /* Options on URL */
3294
3295
3296 /*
3297 * Get the options, if any...
3298 */
3299
3300 if ((options = strchr(con->uri, '?')) != NULL)
3301 {
3302 options ++;
3303 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", options);
3304 }
3305
3306 /*
3307 * Check for known types...
3308 */
3309
3310 if (!type || _cups_strcasecmp(type->super, "application"))
3311 {
3312 cupsdLogClient(con, CUPSD_LOG_DEBUG2,
3313 "is_cgi filename=\"%s\", filestats=%p, "
3314 "type=%s/%s, returning 0", filename,
3315 filestats, type ? type->super : "unknown",
3316 type ? type->type : "unknown");
3317 return (0);
3318 }
3319
3320 if (!_cups_strcasecmp(type->type, "x-httpd-cgi") &&
3321 (filestats->st_mode & 0111))
3322 {
3323 /*
3324 * "application/x-httpd-cgi" is a CGI script.
3325 */
3326
3327 cupsdSetString(&con->command, filename);
3328
3329 if (options)
3330 cupsdSetStringf(&con->options, " %s", options);
3331
3332 cupsdLogClient(con, CUPSD_LOG_DEBUG2,
3333 "is_cgi filename=\"%s\", filestats=%p, "
3334 "type=%s/%s, returning 1", filename,
3335 filestats, type->super, type->type);
3336 return (1);
3337 }
3338 #ifdef HAVE_JAVA
3339 else if (!_cups_strcasecmp(type->type, "x-httpd-java"))
3340 {
3341 /*
3342 * "application/x-httpd-java" is a Java servlet.
3343 */
3344
3345 cupsdSetString(&con->command, CUPS_JAVA);
3346
3347 if (options)
3348 cupsdSetStringf(&con->options, " %s %s", filename, options);
3349 else
3350 cupsdSetStringf(&con->options, " %s", filename);
3351
3352 cupsdLogClient(con, CUPSD_LOG_DEBUG2,
3353 "is_cgi filename=\"%s\", filestats=%p, "
3354 "type=%s/%s, returning 1", filename,
3355 filestats, type->super, type->type);
3356 return (1);
3357 }
3358 #endif /* HAVE_JAVA */
3359 #ifdef HAVE_PERL
3360 else if (!_cups_strcasecmp(type->type, "x-httpd-perl"))
3361 {
3362 /*
3363 * "application/x-httpd-perl" is a Perl page.
3364 */
3365
3366 cupsdSetString(&con->command, CUPS_PERL);
3367
3368 if (options)
3369 cupsdSetStringf(&con->options, " %s %s", filename, options);
3370 else
3371 cupsdSetStringf(&con->options, " %s", filename);
3372
3373 cupsdLogClient(con, CUPSD_LOG_DEBUG2,
3374 "is_cgi filename=\"%s\", filestats=%p, "
3375 "type=%s/%s, returning 1", filename,
3376 filestats, type->super, type->type);
3377 return (1);
3378 }
3379 #endif /* HAVE_PERL */
3380 #ifdef HAVE_PHP
3381 else if (!_cups_strcasecmp(type->type, "x-httpd-php"))
3382 {
3383 /*
3384 * "application/x-httpd-php" is a PHP page.
3385 */
3386
3387 cupsdSetString(&con->command, CUPS_PHP);
3388
3389 if (options)
3390 cupsdSetStringf(&con->options, " %s %s", filename, options);
3391 else
3392 cupsdSetStringf(&con->options, " %s", filename);
3393
3394 cupsdLogClient(con, CUPSD_LOG_DEBUG2,
3395 "is_cgi filename=\"%s\", filestats=%p, "
3396 "type=%s/%s, returning 1", filename,
3397 filestats, type->super, type->type);
3398 return (1);
3399 }
3400 #endif /* HAVE_PHP */
3401 #ifdef HAVE_PYTHON
3402 else if (!_cups_strcasecmp(type->type, "x-httpd-python"))
3403 {
3404 /*
3405 * "application/x-httpd-python" is a Python page.
3406 */
3407
3408 cupsdSetString(&con->command, CUPS_PYTHON);
3409
3410 if (options)
3411 cupsdSetStringf(&con->options, " %s %s", filename, options);
3412 else
3413 cupsdSetStringf(&con->options, " %s", filename);
3414
3415 cupsdLogClient(con, CUPSD_LOG_DEBUG2,
3416 "is_cgi filename=\"%s\", filestats=%p, "
3417 "type=%s/%s, returning 1", filename,
3418 filestats, type->super, type->type);
3419 return (1);
3420 }
3421 #endif /* HAVE_PYTHON */
3422
3423 cupsdLogClient(con, CUPSD_LOG_DEBUG2,
3424 "is_cgi filename=\"%s\", filestats=%p, "
3425 "type=%s/%s, returning 0", filename,
3426 filestats, type->super, type->type);
3427 return (0);
3428 }
3429
3430
3431 /*
3432 * 'is_path_absolute()' - Is a path absolute and free of relative elements (i.e. "..").
3433 */
3434
3435 static int /* O - 0 if relative, 1 if absolute */
3436 is_path_absolute(const char *path) /* I - Input path */
3437 {
3438 /*
3439 * Check for a leading slash...
3440 */
3441
3442 if (path[0] != '/')
3443 return (0);
3444
3445 /*
3446 * Check for "<" or quotes in the path and reject since this is probably
3447 * someone trying to inject HTML...
3448 */
3449
3450 if (strchr(path, '<') != NULL || strchr(path, '\"') != NULL || strchr(path, '\'') != NULL)
3451 return (0);
3452
3453 /*
3454 * Check for "/.." in the path...
3455 */
3456
3457 while ((path = strstr(path, "/..")) != NULL)
3458 {
3459 if (!path[3] || path[3] == '/')
3460 return (0);
3461
3462 path ++;
3463 }
3464
3465 /*
3466 * If we haven't found any relative paths, return 1 indicating an
3467 * absolute path...
3468 */
3469
3470 return (1);
3471 }
3472
3473
3474 /*
3475 * 'pipe_command()' - Pipe the output of a command to the remote client.
3476 */
3477
3478 static int /* O - Process ID */
3479 pipe_command(cupsd_client_t *con, /* I - Client connection */
3480 int infile, /* I - Standard input for command */
3481 int *outfile, /* O - Standard output for command */
3482 char *command, /* I - Command to run */
3483 char *options, /* I - Options for command */
3484 int root) /* I - Run as root? */
3485 {
3486 int i; /* Looping var */
3487 int pid; /* Process ID */
3488 char *commptr, /* Command string pointer */
3489 commch; /* Command string character */
3490 char *uriptr; /* URI string pointer */
3491 int fds[2]; /* Pipe FDs */
3492 int argc; /* Number of arguments */
3493 int envc; /* Number of environment variables */
3494 char argbuf[10240], /* Argument buffer */
3495 *argv[100], /* Argument strings */
3496 *envp[MAX_ENV + 20]; /* Environment variables */
3497 char auth_type[256], /* AUTH_TYPE environment variable */
3498 content_length[1024], /* CONTENT_LENGTH environment variable */
3499 content_type[1024], /* CONTENT_TYPE environment variable */
3500 http_cookie[32768], /* HTTP_COOKIE environment variable */
3501 http_referer[1024], /* HTTP_REFERER environment variable */
3502 http_user_agent[1024], /* HTTP_USER_AGENT environment variable */
3503 lang[1024], /* LANG environment variable */
3504 path_info[1024], /* PATH_INFO environment variable */
3505 remote_addr[1024], /* REMOTE_ADDR environment variable */
3506 remote_host[1024], /* REMOTE_HOST environment variable */
3507 remote_user[1024], /* REMOTE_USER environment variable */
3508 script_filename[1024], /* SCRIPT_FILENAME environment variable */
3509 script_name[1024], /* SCRIPT_NAME environment variable */
3510 server_name[1024], /* SERVER_NAME environment variable */
3511 server_port[1024]; /* SERVER_PORT environment variable */
3512 ipp_attribute_t *attr; /* attributes-natural-language attribute */
3513
3514
3515 /*
3516 * Parse a copy of the options string, which is of the form:
3517 *
3518 * argument+argument+argument
3519 * ?argument+argument+argument
3520 * param=value&param=value
3521 * ?param=value&param=value
3522 * /name?argument+argument+argument
3523 * /name?param=value&param=value
3524 *
3525 * If the string contains an "=" character after the initial name,
3526 * then we treat it as a HTTP GET form request and make a copy of
3527 * the remaining string for the environment variable.
3528 *
3529 * The string is always parsed out as command-line arguments, to
3530 * be consistent with Apache...
3531 */
3532
3533 cupsdLogClient(con, CUPSD_LOG_DEBUG2,
3534 "pipe_command infile=%d, outfile=%p, "
3535 "command=\"%s\", options=\"%s\", root=%d",
3536 infile, outfile, command,
3537 options ? options : "(null)", root);
3538
3539 argv[0] = command;
3540
3541 if (options)
3542 strlcpy(argbuf, options, sizeof(argbuf));
3543 else
3544 argbuf[0] = '\0';
3545
3546 if (argbuf[0] == '/')
3547 {
3548 /*
3549 * Found some trailing path information, set PATH_INFO...
3550 */
3551
3552 if ((commptr = strchr(argbuf, '?')) == NULL)
3553 commptr = argbuf + strlen(argbuf);
3554
3555 commch = *commptr;
3556 *commptr = '\0';
3557 snprintf(path_info, sizeof(path_info), "PATH_INFO=%s", argbuf);
3558 *commptr = commch;
3559 }
3560 else
3561 {
3562 commptr = argbuf;
3563 path_info[0] = '\0';
3564
3565 if (*commptr == ' ')
3566 commptr ++;
3567 }
3568
3569 if (*commptr == '?' && con->operation == HTTP_STATE_GET && !con->query_string)
3570 {
3571 commptr ++;
3572 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", commptr);
3573 }
3574
3575 argc = 1;
3576
3577 if (*commptr)
3578 {
3579 argv[argc ++] = commptr;
3580
3581 for (; *commptr && argc < 99; commptr ++)
3582 {
3583 /*
3584 * Break arguments whenever we see a + or space...
3585 */
3586
3587 if (*commptr == ' ' || *commptr == '+')
3588 {
3589 while (*commptr == ' ' || *commptr == '+')
3590 *commptr++ = '\0';
3591
3592 /*
3593 * If we don't have a blank string, save it as another argument...
3594 */
3595
3596 if (*commptr)
3597 {
3598 argv[argc] = commptr;
3599 argc ++;
3600 }
3601 else
3602 break;
3603 }
3604 else if (*commptr == '%' && isxdigit(commptr[1] & 255) &&
3605 isxdigit(commptr[2] & 255))
3606 {
3607 /*
3608 * Convert the %xx notation to the individual character.
3609 */
3610
3611 if (commptr[1] >= '0' && commptr[1] <= '9')
3612 *commptr = (char)((commptr[1] - '0') << 4);
3613 else
3614 *commptr = (char)((tolower(commptr[1]) - 'a' + 10) << 4);
3615
3616 if (commptr[2] >= '0' && commptr[2] <= '9')
3617 *commptr |= commptr[2] - '0';
3618 else
3619 *commptr |= tolower(commptr[2]) - 'a' + 10;
3620
3621 _cups_strcpy(commptr + 1, commptr + 3);
3622
3623 /*
3624 * Check for a %00 and break if that is the case...
3625 */
3626
3627 if (!*commptr)
3628 break;
3629 }
3630 }
3631 }
3632
3633 argv[argc] = NULL;
3634
3635 /*
3636 * Setup the environment variables as needed...
3637 */
3638
3639 if (con->username[0])
3640 {
3641 snprintf(auth_type, sizeof(auth_type), "AUTH_TYPE=%s",
3642 httpGetField(con->http, HTTP_FIELD_AUTHORIZATION));
3643
3644 if ((uriptr = strchr(auth_type + 10, ' ')) != NULL)
3645 *uriptr = '\0';
3646 }
3647 else
3648 auth_type[0] = '\0';
3649
3650 if (con->request &&
3651 (attr = ippFindAttribute(con->request, "attributes-natural-language",
3652 IPP_TAG_LANGUAGE)) != NULL)
3653 {
3654 switch (strlen(attr->values[0].string.text))
3655 {
3656 default :
3657 /*
3658 * This is an unknown or badly formatted language code; use
3659 * the POSIX locale...
3660 */
3661
3662 strlcpy(lang, "LANG=C", sizeof(lang));
3663 break;
3664
3665 case 2 :
3666 /*
3667 * Just the language code (ll)...
3668 */
3669
3670 snprintf(lang, sizeof(lang), "LANG=%s.UTF8",
3671 attr->values[0].string.text);
3672 break;
3673
3674 case 5 :
3675 /*
3676 * Language and country code (ll-cc)...
3677 */
3678
3679 snprintf(lang, sizeof(lang), "LANG=%c%c_%c%c.UTF8",
3680 attr->values[0].string.text[0],
3681 attr->values[0].string.text[1],
3682 toupper(attr->values[0].string.text[3] & 255),
3683 toupper(attr->values[0].string.text[4] & 255));
3684 break;
3685 }
3686 }
3687 else if (con->language)
3688 snprintf(lang, sizeof(lang), "LANG=%s.UTF8", con->language->language);
3689 else
3690 strlcpy(lang, "LANG=C", sizeof(lang));
3691
3692 strlcpy(remote_addr, "REMOTE_ADDR=", sizeof(remote_addr));
3693 httpAddrString(httpGetAddress(con->http), remote_addr + 12,
3694 sizeof(remote_addr) - 12);
3695
3696 snprintf(remote_host, sizeof(remote_host), "REMOTE_HOST=%s",
3697 httpGetHostname(con->http, NULL, 0));
3698
3699 snprintf(script_name, sizeof(script_name), "SCRIPT_NAME=%s", con->uri);
3700 if ((uriptr = strchr(script_name, '?')) != NULL)
3701 *uriptr = '\0';
3702
3703 snprintf(script_filename, sizeof(script_filename), "SCRIPT_FILENAME=%s%s",
3704 DocumentRoot, script_name + 12);
3705
3706 snprintf(server_port, sizeof(server_port), "SERVER_PORT=%d", con->serverport);
3707
3708 if (httpGetField(con->http, HTTP_FIELD_HOST)[0])
3709 {
3710 char *nameptr; /* Pointer to ":port" */
3711
3712 snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s",
3713 httpGetField(con->http, HTTP_FIELD_HOST));
3714 if ((nameptr = strrchr(server_name, ':')) != NULL && !strchr(nameptr, ']'))
3715 *nameptr = '\0'; /* Strip trailing ":port" */
3716 }
3717 else
3718 snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s",
3719 con->servername);
3720
3721 envc = cupsdLoadEnv(envp, (int)(sizeof(envp) / sizeof(envp[0])));
3722
3723 if (auth_type[0])
3724 envp[envc ++] = auth_type;
3725
3726 envp[envc ++] = lang;
3727 envp[envc ++] = "REDIRECT_STATUS=1";
3728 envp[envc ++] = "GATEWAY_INTERFACE=CGI/1.1";
3729 envp[envc ++] = server_name;
3730 envp[envc ++] = server_port;
3731 envp[envc ++] = remote_addr;
3732 envp[envc ++] = remote_host;
3733 envp[envc ++] = script_name;
3734 envp[envc ++] = script_filename;
3735
3736 if (path_info[0])
3737 envp[envc ++] = path_info;
3738
3739 if (con->username[0])
3740 {
3741 snprintf(remote_user, sizeof(remote_user), "REMOTE_USER=%s", con->username);
3742
3743 envp[envc ++] = remote_user;
3744 }
3745
3746 if (httpGetVersion(con->http) == HTTP_VERSION_1_1)
3747 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.1";
3748 else if (httpGetVersion(con->http) == HTTP_VERSION_1_0)
3749 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.0";
3750 else
3751 envp[envc ++] = "SERVER_PROTOCOL=HTTP/0.9";
3752
3753 if (httpGetCookie(con->http))
3754 {
3755 snprintf(http_cookie, sizeof(http_cookie), "HTTP_COOKIE=%s",
3756 httpGetCookie(con->http));
3757 envp[envc ++] = http_cookie;
3758 }
3759
3760 if (httpGetField(con->http, HTTP_FIELD_USER_AGENT)[0])
3761 {
3762 snprintf(http_user_agent, sizeof(http_user_agent), "HTTP_USER_AGENT=%s",
3763 httpGetField(con->http, HTTP_FIELD_USER_AGENT));
3764 envp[envc ++] = http_user_agent;
3765 }
3766
3767 if (httpGetField(con->http, HTTP_FIELD_REFERER)[0])
3768 {
3769 snprintf(http_referer, sizeof(http_referer), "HTTP_REFERER=%s",
3770 httpGetField(con->http, HTTP_FIELD_REFERER));
3771 envp[envc ++] = http_referer;
3772 }
3773
3774 if (con->operation == HTTP_STATE_GET)
3775 {
3776 envp[envc ++] = "REQUEST_METHOD=GET";
3777
3778 if (con->query_string)
3779 {
3780 /*
3781 * Add GET form variables after ?...
3782 */
3783
3784 envp[envc ++] = con->query_string;
3785 }
3786 else
3787 envp[envc ++] = "QUERY_STRING=";
3788 }
3789 else
3790 {
3791 sprintf(content_length, "CONTENT_LENGTH=" CUPS_LLFMT,
3792 CUPS_LLCAST con->bytes);
3793 snprintf(content_type, sizeof(content_type), "CONTENT_TYPE=%s",
3794 httpGetField(con->http, HTTP_FIELD_CONTENT_TYPE));
3795
3796 envp[envc ++] = "REQUEST_METHOD=POST";
3797 envp[envc ++] = content_length;
3798 envp[envc ++] = content_type;
3799 }
3800
3801 /*
3802 * Tell the CGI if we are using encryption...
3803 */
3804
3805 if (httpIsEncrypted(con->http))
3806 envp[envc ++] = "HTTPS=ON";
3807
3808 /*
3809 * Terminate the environment array...
3810 */
3811
3812 envp[envc] = NULL;
3813
3814 if (LogLevel >= CUPSD_LOG_DEBUG)
3815 {
3816 for (i = 0; i < argc; i ++)
3817 cupsdLogMessage(CUPSD_LOG_DEBUG,
3818 "[CGI] argv[%d] = \"%s\"", i, argv[i]);
3819 for (i = 0; i < envc; i ++)
3820 cupsdLogMessage(CUPSD_LOG_DEBUG,
3821 "[CGI] envp[%d] = \"%s\"", i, envp[i]);
3822 }
3823
3824 /*
3825 * Create a pipe for the output...
3826 */
3827
3828 if (cupsdOpenPipe(fds))
3829 {
3830 cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to create pipe for %s - %s",
3831 argv[0], strerror(errno));
3832 return (0);
3833 }
3834
3835 /*
3836 * Then execute the command...
3837 */
3838
3839 if (cupsdStartProcess(command, argv, envp, infile, fds[1], CGIPipes[1],
3840 -1, -1, root, DefaultProfile, NULL, &pid) < 0)
3841 {
3842 /*
3843 * Error - can't fork!
3844 */
3845
3846 cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to start %s - %s", argv[0],
3847 strerror(errno));
3848
3849 cupsdClosePipe(fds);
3850 pid = 0;
3851 }
3852 else
3853 {
3854 /*
3855 * Fork successful - return the PID...
3856 */
3857
3858 if (con->username[0])
3859 cupsdAddCert(pid, con->username, con->type);
3860
3861 cupsdLogMessage(CUPSD_LOG_DEBUG, "[CGI] Started %s (PID %d)", command, pid);
3862
3863 *outfile = fds[0];
3864 close(fds[1]);
3865 }
3866
3867 return (pid);
3868 }
3869
3870
3871 /*
3872 * 'valid_host()' - Is the Host: field valid?
3873 */
3874
3875 static int /* O - 1 if valid, 0 if not */
3876 valid_host(cupsd_client_t *con) /* I - Client connection */
3877 {
3878 cupsd_alias_t *a; /* Current alias */
3879 cupsd_netif_t *netif; /* Current network interface */
3880 const char *end; /* End character */
3881 char *ptr; /* Pointer into host value */
3882
3883
3884 /*
3885 * Copy the Host: header for later use...
3886 */
3887
3888 strlcpy(con->clientname, httpGetField(con->http, HTTP_FIELD_HOST),
3889 sizeof(con->clientname));
3890 if ((ptr = strrchr(con->clientname, ':')) != NULL && !strchr(ptr, ']'))
3891 {
3892 *ptr++ = '\0';
3893 con->clientport = atoi(ptr);
3894 }
3895 else
3896 con->clientport = con->serverport;
3897
3898 /*
3899 * Then validate...
3900 */
3901
3902 if (httpAddrLocalhost(httpGetAddress(con->http)))
3903 {
3904 /*
3905 * Only allow "localhost" or the equivalent IPv4 or IPv6 numerical
3906 * addresses when accessing CUPS via the loopback interface...
3907 */
3908
3909 return (!_cups_strcasecmp(con->clientname, "localhost") ||
3910 !_cups_strcasecmp(con->clientname, "localhost.") ||
3911 #ifdef __linux
3912 !_cups_strcasecmp(con->clientname, "localhost.localdomain") ||
3913 #endif /* __linux */
3914 !strcmp(con->clientname, "127.0.0.1") ||
3915 !strcmp(con->clientname, "[::1]"));
3916 }
3917
3918 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
3919 /*
3920 * Check if the hostname is something.local (Bonjour); if so, allow it.
3921 */
3922
3923 if ((end = strrchr(con->clientname, '.')) != NULL && end > con->clientname &&
3924 !end[1])
3925 {
3926 /*
3927 * "." on end, work back to second-to-last "."...
3928 */
3929
3930 for (end --; end > con->clientname && *end != '.'; end --);
3931 }
3932
3933 if (end && (!_cups_strcasecmp(end, ".local") ||
3934 !_cups_strcasecmp(end, ".local.")))
3935 return (1);
3936 #endif /* HAVE_DNSSD || HAVE_AVAHI */
3937
3938 /*
3939 * Check if the hostname is an IP address...
3940 */
3941
3942 if (isdigit(con->clientname[0] & 255) || con->clientname[0] == '[')
3943 {
3944 /*
3945 * Possible IPv4/IPv6 address...
3946 */
3947
3948 http_addrlist_t *addrlist; /* List of addresses */
3949
3950
3951 if ((addrlist = httpAddrGetList(con->clientname, AF_UNSPEC, NULL)) != NULL)
3952 {
3953 /*
3954 * Good IPv4/IPv6 address...
3955 */
3956
3957 httpAddrFreeList(addrlist);
3958 return (1);
3959 }
3960 }
3961
3962 /*
3963 * Check for (alias) name matches...
3964 */
3965
3966 for (a = (cupsd_alias_t *)cupsArrayFirst(ServerAlias);
3967 a;
3968 a = (cupsd_alias_t *)cupsArrayNext(ServerAlias))
3969 {
3970 /*
3971 * "ServerAlias *" allows all host values through...
3972 */
3973
3974 if (!strcmp(a->name, "*"))
3975 return (1);
3976
3977 if (!_cups_strncasecmp(con->clientname, a->name, a->namelen))
3978 {
3979 /*
3980 * Prefix matches; check the character at the end - it must be "." or nul.
3981 */
3982
3983 end = con->clientname + a->namelen;
3984
3985 if (!*end || (*end == '.' && !end[1]))
3986 return (1);
3987 }
3988 }
3989
3990 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
3991 for (a = (cupsd_alias_t *)cupsArrayFirst(DNSSDAlias);
3992 a;
3993 a = (cupsd_alias_t *)cupsArrayNext(DNSSDAlias))
3994 {
3995 /*
3996 * "ServerAlias *" allows all host values through...
3997 */
3998
3999 if (!strcmp(a->name, "*"))
4000 return (1);
4001
4002 if (!_cups_strncasecmp(con->clientname, a->name, a->namelen))
4003 {
4004 /*
4005 * Prefix matches; check the character at the end - it must be "." or nul.
4006 */
4007
4008 end = con->clientname + a->namelen;
4009
4010 if (!*end || (*end == '.' && !end[1]))
4011 return (1);
4012 }
4013 }
4014 #endif /* HAVE_DNSSD || HAVE_AVAHI */
4015
4016 /*
4017 * Check for interface hostname matches...
4018 */
4019
4020 for (netif = (cupsd_netif_t *)cupsArrayFirst(NetIFList);
4021 netif;
4022 netif = (cupsd_netif_t *)cupsArrayNext(NetIFList))
4023 {
4024 if (!_cups_strncasecmp(con->clientname, netif->hostname, netif->hostlen))
4025 {
4026 /*
4027 * Prefix matches; check the character at the end - it must be "." or nul.
4028 */
4029
4030 end = con->clientname + netif->hostlen;
4031
4032 if (!*end || (*end == '.' && !end[1]))
4033 return (1);
4034 }
4035 }
4036
4037 return (0);
4038 }
4039
4040
4041 /*
4042 * 'write_file()' - Send a file via HTTP.
4043 */
4044
4045 static int /* O - 0 on failure, 1 on success */
4046 write_file(cupsd_client_t *con, /* I - Client connection */
4047 http_status_t code, /* I - HTTP status */
4048 char *filename, /* I - Filename */
4049 char *type, /* I - File type */
4050 struct stat *filestats) /* O - File information */
4051 {
4052 con->file = open(filename, O_RDONLY);
4053
4054 cupsdLogClient(con, CUPSD_LOG_DEBUG2,
4055 "write_file code=%d, filename=\"%s\" (%d), "
4056 "type=\"%s\", filestats=%p",
4057 code, filename, con->file, type ? type : "(null)", filestats);
4058
4059 if (con->file < 0)
4060 return (0);
4061
4062 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
4063
4064 con->pipe_pid = 0;
4065 con->sent_header = 1;
4066
4067 httpClearFields(con->http);
4068
4069 httpSetLength(con->http, (size_t)filestats->st_size);
4070
4071 httpSetField(con->http, HTTP_FIELD_LAST_MODIFIED,
4072 httpGetDateString(filestats->st_mtime));
4073
4074 if (!cupsdSendHeader(con, code, type, CUPSD_AUTH_NONE))
4075 return (0);
4076
4077 cupsdAddSelect(httpGetFd(con->http), NULL, (cupsd_selfunc_t)cupsdWriteClient, con);
4078
4079 cupsdLogClient(con, CUPSD_LOG_DEBUG, "Sending file.");
4080
4081 return (1);
4082 }
4083
4084
4085 /*
4086 * 'write_pipe()' - Flag that data is available on the CGI pipe.
4087 */
4088
4089 static void
4090 write_pipe(cupsd_client_t *con) /* I - Client connection */
4091 {
4092 cupsdLogClient(con, CUPSD_LOG_DEBUG2, "write_pipe CGI output on fd %d",
4093 con->file);
4094
4095 con->file_ready = 1;
4096
4097 cupsdRemoveSelect(con->file);
4098 cupsdAddSelect(httpGetFd(con->http), NULL, (cupsd_selfunc_t)cupsdWriteClient, con);
4099
4100 cupsdLogClient(con, CUPSD_LOG_DEBUG, "CGI data ready to be sent.");
4101 }
4102
4103
4104 /*
4105 * End of "$Id$".
4106 */
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