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[thirdparty/cups.git] / scheduler / client.c
1 /*
2 * "$Id: client.c 10886 2013-03-08 17:56:02Z mike $"
3 *
4 * Client routines for the CUPS scheduler.
5 *
6 * Copyright 2007-2013 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 * Contents:
19 *
20 * cupsdAcceptClient() - Accept a new client.
21 * cupsdCloseAllClients() - Close all remote clients immediately.
22 * cupsdCloseClient() - Close a remote client.
23 * cupsdFlushHeader() - Flush the header fields to the client.
24 * cupsdReadClient() - Read data from a client.
25 * cupsdSendCommand() - Send output from a command via HTTP.
26 * cupsdSendError() - Send an error message via HTTP.
27 * cupsdSendHeader() - Send an HTTP request.
28 * cupsdUpdateCGI() - Read status messages from CGI scripts and
29 * programs.
30 * cupsdWriteClient() - Write data to a client as needed.
31 * check_if_modified() - Decode an "If-Modified-Since" line.
32 * compare_clients() - Compare two client connections.
33 * data_ready() - Check whether data is available from a client.
34 * get_file() - Get a filename and state info.
35 * install_cupsd_conf() - Install a configuration file.
36 * is_cgi() - Is the resource a CGI script/program?
37 * is_path_absolute() - Is a path absolute and free of relative elements
38 * (i.e. "..").
39 * pipe_command() - Pipe the output of a command to the remote
40 * client.
41 * valid_host() - Is the Host: field valid?
42 * write_file() - Send a file via HTTP.
43 * write_pipe() - Flag that data is available on the CGI pipe.
44 */
45
46 /*
47 * Include necessary headers...
48 */
49
50 #include "cupsd.h"
51
52 #ifdef __APPLE__
53 # include <libproc.h>
54 #endif /* __APPLE__ */
55 #ifdef HAVE_TCPD_H
56 # include <tcpd.h>
57 #endif /* HAVE_TCPD_H */
58
59
60 /*
61 * Local globals...
62 */
63
64 static const char * const http_states[] =
65 { /* HTTP state strings */
66 "HTTP_STATE_ERROR",
67 "HTTP_STATE_WAITING",
68 "HTTP_STATE_OPTIONS",
69 "HTTP_STATE_GET",
70 "HTTP_STATE_GET_SEND",
71 "HTTP_STATE_HEAD",
72 "HTTP_STATE_POST",
73 "HTTP_STATE_POST_RECV",
74 "HTTP_STATE_POST_SEND",
75 "HTTP_STATE_PUT",
76 "HTTP_STATE_PUT_RECV",
77 "HTTP_STATE_DELETE",
78 "HTTP_STATE_TRACE",
79 "HTTP_STATE_CONNECT",
80 "HTTP_STATE_STATUS",
81 "HTTP_STATE_UNKNOWN_METHOD",
82 "HTTP_STATE_UNKNOWN_VERSION"
83 };
84 static const char * const ipp_states[] =
85 { /* IPP state strings */
86 "IPP_IDLE",
87 "IPP_HEADER",
88 "IPP_ATTRIBUTE",
89 "IPP_DATA"
90 };
91
92
93 /*
94 * Local functions...
95 */
96
97 static int check_if_modified(cupsd_client_t *con,
98 struct stat *filestats);
99 static int compare_clients(cupsd_client_t *a, cupsd_client_t *b,
100 void *data);
101 static int data_ready(cupsd_client_t *con);
102 static char *get_file(cupsd_client_t *con, struct stat *filestats,
103 char *filename, int len);
104 static http_status_t install_cupsd_conf(cupsd_client_t *con);
105 static int is_cgi(cupsd_client_t *con, const char *filename,
106 struct stat *filestats, mime_type_t *type);
107 static int is_path_absolute(const char *path);
108 static int pipe_command(cupsd_client_t *con, int infile, int *outfile,
109 char *command, char *options, int root);
110 static int valid_host(cupsd_client_t *con);
111 static int write_file(cupsd_client_t *con, http_status_t code,
112 char *filename, char *type,
113 struct stat *filestats);
114 static void write_pipe(cupsd_client_t *con);
115
116
117 /*
118 * 'cupsdAcceptClient()' - Accept a new client.
119 */
120
121 void
122 cupsdAcceptClient(cupsd_listener_t *lis)/* I - Listener socket */
123 {
124 int count; /* Count of connections on a host */
125 int val; /* Parameter value */
126 cupsd_client_t *con, /* New client pointer */
127 *tempcon; /* Temporary client pointer */
128 http_addrlist_t *addrlist, /* List of adddresses for host */
129 *addr; /* Current address */
130 socklen_t addrlen; /* Length of address */
131 char *hostname; /* Hostname for address */
132 http_addr_t temp; /* Temporary address variable */
133 static time_t last_dos = 0; /* Time of last DoS attack */
134 #ifdef HAVE_TCPD_H
135 struct request_info wrap_req; /* TCP wrappers request information */
136 #endif /* HAVE_TCPD_H */
137
138
139 cupsdLogMessage(CUPSD_LOG_DEBUG2,
140 "cupsdAcceptClient(lis=%p(%d)) Clients=%d",
141 lis, lis->fd, cupsArrayCount(Clients));
142
143 /*
144 * Make sure we don't have a full set of clients already...
145 */
146
147 if (cupsArrayCount(Clients) == MaxClients)
148 return;
149
150 /*
151 * Get a pointer to the next available client...
152 */
153
154 if (!Clients)
155 Clients = cupsArrayNew(NULL, NULL);
156
157 if (!Clients)
158 {
159 cupsdLogMessage(CUPSD_LOG_ERROR,
160 "Unable to allocate memory for clients array!");
161 cupsdPauseListening();
162 return;
163 }
164
165 if (!ActiveClients)
166 ActiveClients = cupsArrayNew((cups_array_func_t)compare_clients, NULL);
167
168 if (!ActiveClients)
169 {
170 cupsdLogMessage(CUPSD_LOG_ERROR,
171 "Unable to allocate memory for active clients array!");
172 cupsdPauseListening();
173 return;
174 }
175
176 if ((con = calloc(1, sizeof(cupsd_client_t))) == NULL)
177 {
178 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to allocate memory for client!");
179 cupsdPauseListening();
180 return;
181 }
182
183 con->file = -1;
184 con->http.activity = time(NULL);
185 con->http.hostaddr = &(con->clientaddr);
186 con->http.wait_value = 10000;
187 con->http.mode = _HTTP_MODE_SERVER;
188
189 /*
190 * Accept the client and get the remote address...
191 */
192
193 addrlen = sizeof(http_addr_t);
194
195 if ((con->http.fd = accept(lis->fd, (struct sockaddr *)con->http.hostaddr,
196 &addrlen)) < 0)
197 {
198 if (errno == ENFILE || errno == EMFILE)
199 cupsdPauseListening();
200
201 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to accept client connection - %s.",
202 strerror(errno));
203 free(con);
204
205 return;
206 }
207
208 /*
209 * Save the connected port number...
210 */
211
212 _httpAddrSetPort(con->http.hostaddr, httpAddrPort(&(lis->address)));
213
214 #ifdef AF_INET6
215 /*
216 * Convert IPv4 over IPv6 addresses (::ffff:n.n.n.n) to IPv4 forms we
217 * can more easily use...
218 */
219
220 if (lis->address.addr.sa_family == AF_INET6 &&
221 con->http.hostaddr->ipv6.sin6_addr.s6_addr32[0] == 0 &&
222 con->http.hostaddr->ipv6.sin6_addr.s6_addr32[1] == 0 &&
223 ntohl(con->http.hostaddr->ipv6.sin6_addr.s6_addr32[2]) == 0xffff)
224 con->http.hostaddr->ipv6.sin6_addr.s6_addr32[2] = 0;
225 #endif /* AF_INET6 */
226
227 /*
228 * Check the number of clients on the same address...
229 */
230
231 for (count = 0, tempcon = (cupsd_client_t *)cupsArrayFirst(Clients);
232 tempcon;
233 tempcon = (cupsd_client_t *)cupsArrayNext(Clients))
234 if (httpAddrEqual(tempcon->http.hostaddr, con->http.hostaddr))
235 {
236 count ++;
237 if (count >= MaxClientsPerHost)
238 break;
239 }
240
241 if (count >= MaxClientsPerHost)
242 {
243 if ((time(NULL) - last_dos) >= 60)
244 {
245 last_dos = time(NULL);
246 cupsdLogMessage(CUPSD_LOG_WARN,
247 "Possible DoS attack - more than %d clients connecting "
248 "from %s!",
249 MaxClientsPerHost,
250 httpAddrString(con->http.hostaddr, con->http.hostname,
251 sizeof(con->http.hostname)));
252 }
253
254 #ifdef WIN32
255 closesocket(con->http.fd);
256 #else
257 close(con->http.fd);
258 #endif /* WIN32 */
259
260 free(con);
261 return;
262 }
263
264 /*
265 * Get the hostname or format the IP address as needed...
266 */
267
268 if (httpAddrLocalhost(con->http.hostaddr))
269 {
270 /*
271 * Map accesses from the loopback interface to "localhost"...
272 */
273
274 strlcpy(con->http.hostname, "localhost", sizeof(con->http.hostname));
275 hostname = con->http.hostname;
276 }
277 else
278 {
279 /*
280 * Map accesses from the same host to the server name.
281 */
282
283 if (HostNameLookups)
284 hostname = httpAddrLookup(con->http.hostaddr, con->http.hostname,
285 sizeof(con->http.hostname));
286 else
287 {
288 hostname = NULL;
289 httpAddrString(con->http.hostaddr, con->http.hostname,
290 sizeof(con->http.hostname));
291 }
292 }
293
294 if (hostname == NULL && HostNameLookups == 2)
295 {
296 /*
297 * Can't have an unresolved IP address with double-lookups enabled...
298 */
299
300 #ifdef WIN32
301 closesocket(con->http.fd);
302 #else
303 close(con->http.fd);
304 #endif /* WIN32 */
305
306 cupsdLogMessage(CUPSD_LOG_WARN,
307 "Name lookup failed - connection from %s closed!",
308 con->http.hostname);
309
310 free(con);
311 return;
312 }
313
314 if (HostNameLookups == 2)
315 {
316 /*
317 * Do double lookups as needed...
318 */
319
320 if ((addrlist = httpAddrGetList(con->http.hostname, AF_UNSPEC, NULL))
321 != NULL)
322 {
323 /*
324 * See if the hostname maps to the same IP address...
325 */
326
327 for (addr = addrlist; addr; addr = addr->next)
328 if (httpAddrEqual(con->http.hostaddr, &(addr->addr)))
329 break;
330 }
331 else
332 addr = NULL;
333
334 httpAddrFreeList(addrlist);
335
336 if (!addr)
337 {
338 /*
339 * Can't have a hostname that doesn't resolve to the same IP address
340 * with double-lookups enabled...
341 */
342
343 #ifdef WIN32
344 closesocket(con->http.fd);
345 #else
346 close(con->http.fd);
347 #endif /* WIN32 */
348
349 cupsdLogMessage(CUPSD_LOG_WARN,
350 "IP lookup failed - connection from %s closed!",
351 con->http.hostname);
352 free(con);
353 return;
354 }
355 }
356
357 #ifdef HAVE_TCPD_H
358 /*
359 * See if the connection is denied by TCP wrappers...
360 */
361
362 request_init(&wrap_req, RQ_DAEMON, "cupsd", RQ_FILE, con->http.fd, NULL);
363 fromhost(&wrap_req);
364
365 if (!hosts_access(&wrap_req))
366 {
367 #ifdef WIN32
368 closesocket(con->http.fd);
369 #else
370 close(con->http.fd);
371 #endif /* WIN32 */
372
373 cupsdLogMessage(CUPSD_LOG_WARN,
374 "Connection from %s refused by /etc/hosts.allow and "
375 "/etc/hosts.deny rules.", con->http.hostname);
376 free(con);
377 return;
378 }
379 #endif /* HAVE_TCPD_H */
380
381 #ifdef AF_LOCAL
382 if (con->http.hostaddr->addr.sa_family == AF_LOCAL)
383 {
384 # ifdef __APPLE__
385 socklen_t peersize; /* Size of peer credentials */
386 pid_t peerpid; /* Peer process ID */
387 char name[256]; /* Name of process */
388
389 peersize = sizeof(peerpid);
390 if (!getsockopt(con->http.fd, SOL_LOCAL, LOCAL_PEERPID, &peerpid,
391 &peersize))
392 {
393 if (!proc_name(peerpid, name, sizeof(name)))
394 cupsdLogMessage(CUPSD_LOG_DEBUG,
395 "[Client %d] Accepted from %s (Domain ???[%d])",
396 con->http.fd, con->http.hostname, (int)peerpid);
397 else
398 cupsdLogMessage(CUPSD_LOG_DEBUG,
399 "[Client %d] Accepted from %s (Domain %s[%d])",
400 con->http.fd, con->http.hostname, name, (int)peerpid);
401 }
402 else
403 # endif /* __APPLE__ */
404
405 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] Accepted from %s (Domain)",
406 con->http.fd, con->http.hostname);
407 }
408 else
409 #endif /* AF_LOCAL */
410 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] Accepted from %s:%d (IPv%d)",
411 con->http.fd, con->http.hostname,
412 httpAddrPort(con->http.hostaddr),
413 _httpAddrFamily(con->http.hostaddr) == AF_INET ? 4 : 6);
414
415 /*
416 * Get the local address the client connected to...
417 */
418
419 addrlen = sizeof(temp);
420 if (getsockname(con->http.fd, (struct sockaddr *)&temp, &addrlen))
421 {
422 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to get local address - %s",
423 strerror(errno));
424
425 strlcpy(con->servername, "localhost", sizeof(con->servername));
426 con->serverport = LocalPort;
427 }
428 #ifdef AF_LOCAL
429 else if (_httpAddrFamily(&temp) == AF_LOCAL)
430 {
431 strlcpy(con->servername, "localhost", sizeof(con->servername));
432 con->serverport = LocalPort;
433 }
434 #endif /* AF_LOCAL */
435 else
436 {
437 if (httpAddrLocalhost(&temp))
438 strlcpy(con->servername, "localhost", sizeof(con->servername));
439 else if (HostNameLookups)
440 httpAddrLookup(&temp, con->servername, sizeof(con->servername));
441 else
442 httpAddrString(&temp, con->servername, sizeof(con->servername));
443
444 con->serverport = httpAddrPort(&(lis->address));
445 }
446
447 /*
448 * Add the connection to the array of active clients...
449 */
450
451 cupsArrayAdd(Clients, con);
452
453 /*
454 * Using TCP_NODELAY improves responsiveness, especially on systems with a slow
455 * loopback interface. Since we write large buffers when sending print files
456 * and requests there shouldn't be any performance penalty for this...
457 */
458
459 val = 1;
460 setsockopt(con->http.fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
461
462 /*
463 * Close this file on all execs...
464 */
465
466 fcntl(con->http.fd, F_SETFD, fcntl(con->http.fd, F_GETFD) | FD_CLOEXEC);
467
468 /*
469 * Add the socket to the server select.
470 */
471
472 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
473
474 /*
475 * Temporarily suspend accept()'s until we lose a client...
476 */
477
478 if (cupsArrayCount(Clients) == MaxClients)
479 cupsdPauseListening();
480
481 #ifdef HAVE_SSL
482 /*
483 * See if we are connecting on a secure port...
484 */
485
486 if (lis->encryption == HTTP_ENCRYPT_ALWAYS)
487 {
488 /*
489 * https connection; go secure...
490 */
491
492 con->http.encryption = HTTP_ENCRYPT_ALWAYS;
493
494 if (!cupsdStartTLS(con))
495 cupsdCloseClient(con);
496 }
497 else
498 con->auto_ssl = 1;
499 #endif /* HAVE_SSL */
500 }
501
502
503 /*
504 * 'cupsdCloseAllClients()' - Close all remote clients immediately.
505 */
506
507 void
508 cupsdCloseAllClients(void)
509 {
510 cupsd_client_t *con; /* Current client */
511
512
513 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCloseAllClients() Clients=%d",
514 cupsArrayCount(Clients));
515
516 for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
517 con;
518 con = (cupsd_client_t *)cupsArrayNext(Clients))
519 if (cupsdCloseClient(con))
520 cupsdCloseClient(con);
521 }
522
523
524 /*
525 * 'cupsdCloseClient()' - Close a remote client.
526 */
527
528 int /* O - 1 if partial close, 0 if fully closed */
529 cupsdCloseClient(cupsd_client_t *con) /* I - Client to close */
530 {
531 int partial; /* Do partial close for SSL? */
532 #ifdef HAVE_LIBSSL
533 #elif defined(HAVE_GNUTLS)
534 # elif defined(HAVE_CDSASSL)
535 #endif /* HAVE_LIBSSL */
536
537
538 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] Closing connection.",
539 con->http.fd);
540
541 /*
542 * Flush pending writes before closing...
543 */
544
545 httpFlushWrite(HTTP(con));
546
547 partial = 0;
548
549 #ifdef HAVE_SSL
550 /*
551 * Shutdown encryption as needed...
552 */
553
554 if (con->http.tls)
555 {
556 partial = 1;
557
558 cupsdEndTLS(con);
559 }
560 #endif /* HAVE_SSL */
561
562 if (con->pipe_pid != 0)
563 {
564 /*
565 * Stop any CGI process...
566 */
567
568 cupsdEndProcess(con->pipe_pid, 1);
569 con->pipe_pid = 0;
570 }
571
572 if (con->file >= 0)
573 {
574 cupsdRemoveSelect(con->file);
575
576 close(con->file);
577 con->file = -1;
578 }
579
580 /*
581 * Close the socket and clear the file from the input set for select()...
582 */
583
584 if (con->http.fd >= 0)
585 {
586 cupsArrayRemove(ActiveClients, con);
587 cupsdSetBusyState();
588
589 if (partial)
590 {
591 /*
592 * Only do a partial close so that the encrypted client gets everything.
593 */
594
595 shutdown(con->http.fd, 0);
596 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
597 }
598 else
599 {
600 /*
601 * Shut the socket down fully...
602 */
603
604 cupsdRemoveSelect(con->http.fd);
605 close(con->http.fd);
606 con->http.fd = -1;
607 }
608 }
609
610 if (!partial)
611 {
612 /*
613 * Free memory...
614 */
615
616 if (con->http.input_set)
617 free(con->http.input_set);
618
619 httpClearCookie(HTTP(con));
620 httpClearFields(HTTP(con));
621
622 cupsdClearString(&con->filename);
623 cupsdClearString(&con->command);
624 cupsdClearString(&con->options);
625 cupsdClearString(&con->query_string);
626
627 if (con->request)
628 {
629 ippDelete(con->request);
630 con->request = NULL;
631 }
632
633 if (con->response)
634 {
635 ippDelete(con->response);
636 con->response = NULL;
637 }
638
639 if (con->language)
640 {
641 cupsLangFree(con->language);
642 con->language = NULL;
643 }
644
645 #ifdef HAVE_AUTHORIZATION_H
646 if (con->authref)
647 {
648 AuthorizationFree(con->authref, kAuthorizationFlagDefaults);
649 con->authref = NULL;
650 }
651 #endif /* HAVE_AUTHORIZATION_H */
652
653 /*
654 * Re-enable new client connections if we are going back under the
655 * limit...
656 */
657
658 if (cupsArrayCount(Clients) == MaxClients)
659 cupsdResumeListening();
660
661 /*
662 * Compact the list of clients as necessary...
663 */
664
665 cupsArrayRemove(Clients, con);
666
667 free(con);
668 }
669
670 return (partial);
671 }
672
673
674 /*
675 * 'cupsdFlushHeader()' - Flush the header fields to the client.
676 */
677
678 int /* I - Bytes written or -1 on error */
679 cupsdFlushHeader(cupsd_client_t *con) /* I - Client to flush to */
680 {
681 int bytes = httpFlushWrite(HTTP(con));
682
683 con->http.data_encoding = HTTP_ENCODING_LENGTH;
684
685 return (bytes);
686 }
687
688
689 /*
690 * 'cupsdReadClient()' - Read data from a client.
691 */
692
693 void
694 cupsdReadClient(cupsd_client_t *con) /* I - Client to read from */
695 {
696 char line[32768], /* Line from client... */
697 operation[64], /* Operation code from socket */
698 version[64], /* HTTP version number string */
699 locale[64], /* Locale */
700 *ptr; /* Pointer into strings */
701 int major, minor; /* HTTP version numbers */
702 http_status_t status; /* Transfer status */
703 ipp_state_t ipp_state; /* State of IPP transfer */
704 int bytes; /* Number of bytes to POST */
705 char *filename; /* Name of file for GET/HEAD */
706 char buf[1024]; /* Buffer for real filename */
707 struct stat filestats; /* File information */
708 mime_type_t *type; /* MIME type of file */
709 cupsd_printer_t *p; /* Printer */
710 static unsigned request_id = 0; /* Request ID for temp files */
711
712
713 status = HTTP_CONTINUE;
714
715 cupsdLogMessage(CUPSD_LOG_DEBUG2,
716 "[Client %d] cupsdReadClient "
717 "error=%d, "
718 "used=%d, "
719 "state=%s, "
720 "data_encoding=HTTP_ENCODING_%s, "
721 "data_remaining=" CUPS_LLFMT ", "
722 "request=%p(%s), "
723 "file=%d",
724 con->http.fd, con->http.error, con->http.used,
725 http_states[con->http.state + 1],
726 con->http.data_encoding == HTTP_ENCODING_CHUNKED ?
727 "CHUNKED" : "LENGTH",
728 CUPS_LLCAST con->http.data_remaining,
729 con->request,
730 con->request ? ipp_states[con->request->state] : "",
731 con->file);
732
733 #ifdef HAVE_SSL
734 if (con->auto_ssl)
735 {
736 /*
737 * Automatically check for a SSL/TLS handshake...
738 */
739
740 con->auto_ssl = 0;
741
742 if (recv(con->http.fd, buf, 1, MSG_PEEK) == 1 &&
743 (!buf[0] || !strchr("DGHOPT", buf[0])))
744 {
745 /*
746 * Encrypt this connection...
747 */
748
749 cupsdLogMessage(CUPSD_LOG_DEBUG2,
750 "[Client %d] Saw first byte %02X, auto-negotiating "
751 "SSL/TLS session.", con->http.fd, buf[0] & 255);
752
753 if (!cupsdStartTLS(con))
754 cupsdCloseClient(con);
755
756 return;
757 }
758 }
759 #endif /* HAVE_SSL */
760
761 switch (con->http.state)
762 {
763 case HTTP_STATE_WAITING :
764 /*
765 * See if we've received a request line...
766 */
767
768 if (httpGets(line, sizeof(line) - 1, HTTP(con)) == NULL)
769 {
770 if (con->http.error && con->http.error != EPIPE)
771 cupsdLogMessage(CUPSD_LOG_DEBUG,
772 "[Client %d] HTTP_STATE_WAITING Closing for error %d "
773 "(%s)", con->http.fd, con->http.error,
774 strerror(con->http.error));
775 else
776 cupsdLogMessage(CUPSD_LOG_DEBUG,
777 "[Client %d] HTTP_STATE_WAITING Closing on EOF",
778 con->http.fd);
779
780 cupsdCloseClient(con);
781 return;
782 }
783
784 /*
785 * Ignore blank request lines...
786 */
787
788 if (line[0] == '\0')
789 break;
790
791 /*
792 * Clear other state variables...
793 */
794
795 httpClearFields(HTTP(con));
796
797 con->http.activity = time(NULL);
798 con->http.version = HTTP_1_0;
799 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
800 con->http.data_encoding = HTTP_ENCODING_LENGTH;
801 con->http.data_remaining = 0;
802 con->http._data_remaining = 0;
803 con->operation = HTTP_STATE_WAITING;
804 con->bytes = 0;
805 con->file = -1;
806 con->file_ready = 0;
807 con->pipe_pid = 0;
808 con->username[0] = '\0';
809 con->password[0] = '\0';
810 con->uri[0] = '\0';
811
812 cupsdClearString(&con->command);
813 cupsdClearString(&con->options);
814 cupsdClearString(&con->query_string);
815
816 if (con->request)
817 {
818 ippDelete(con->request);
819 con->request = NULL;
820 }
821
822 if (con->response)
823 {
824 ippDelete(con->response);
825 con->response = NULL;
826 }
827
828 if (con->language)
829 {
830 cupsLangFree(con->language);
831 con->language = NULL;
832 }
833
834 #ifdef HAVE_GSSAPI
835 con->have_gss = 0;
836 con->gss_uid = 0;
837 #endif /* HAVE_GSSAPI */
838
839 /*
840 * Grab the request line...
841 */
842
843 switch (sscanf(line, "%63s%1023s%63s", operation, con->uri, version))
844 {
845 case 1 :
846 if (line[0])
847 {
848 cupsdLogMessage(CUPSD_LOG_ERROR,
849 "[Client %d] Bad request line \"%s\" from %s.",
850 con->http.fd,
851 _httpEncodeURI(buf, line, sizeof(buf)),
852 con->http.hostname);
853 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
854 cupsdCloseClient(con);
855 }
856 return;
857 case 2 :
858 con->http.version = HTTP_0_9;
859 break;
860 case 3 :
861 if (sscanf(version, "HTTP/%d.%d", &major, &minor) != 2)
862 {
863 cupsdLogMessage(CUPSD_LOG_ERROR,
864 "[Client %d] Bad request line \"%s\" from %s.",
865 con->http.fd,
866 _httpEncodeURI(buf, line, sizeof(buf)),
867 con->http.hostname);
868 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
869 cupsdCloseClient(con);
870 return;
871 }
872
873 if (major < 2)
874 {
875 con->http.version = (http_version_t)(major * 100 + minor);
876 if (con->http.version == HTTP_1_1 && KeepAlive)
877 con->http.keep_alive = HTTP_KEEPALIVE_ON;
878 else
879 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
880 }
881 else
882 {
883 cupsdLogMessage(CUPSD_LOG_ERROR,
884 "[Client %d] Unsupported request line \"%s\" "
885 "from %s.", con->http.fd,
886 _httpEncodeURI(buf, line, sizeof(buf)),
887 con->http.hostname);
888 cupsdSendError(con, HTTP_NOT_SUPPORTED, CUPSD_AUTH_NONE);
889 cupsdCloseClient(con);
890 return;
891 }
892 break;
893 }
894
895 /*
896 * Handle full URLs in the request line...
897 */
898
899 if (strcmp(con->uri, "*"))
900 {
901 char scheme[HTTP_MAX_URI], /* Method/scheme */
902 userpass[HTTP_MAX_URI], /* Username:password */
903 hostname[HTTP_MAX_URI], /* Hostname */
904 resource[HTTP_MAX_URI]; /* Resource path */
905 int port; /* Port number */
906
907
908 /*
909 * Separate the URI into its components...
910 */
911
912 httpSeparateURI(HTTP_URI_CODING_MOST, con->uri,
913 scheme, sizeof(scheme),
914 userpass, sizeof(userpass),
915 hostname, sizeof(hostname), &port,
916 resource, sizeof(resource));
917
918 /*
919 * Only allow URIs with the servername, localhost, or an IP
920 * address...
921 */
922
923 if (strcmp(scheme, "file") &&
924 _cups_strcasecmp(hostname, ServerName) &&
925 _cups_strcasecmp(hostname, "localhost") &&
926 !isdigit(hostname[0]) && hostname[0] != '[')
927 {
928 /*
929 * Nope, we don't do proxies...
930 */
931
932 cupsdLogMessage(CUPSD_LOG_ERROR,
933 "[Client %d] Bad URI \"%s\" in request.",
934 con->http.fd, con->uri);
935 cupsdSendError(con, HTTP_METHOD_NOT_ALLOWED, CUPSD_AUTH_NONE);
936 cupsdCloseClient(con);
937 return;
938 }
939
940 /*
941 * Copy the resource portion back into the URI; both resource and
942 * con->uri are HTTP_MAX_URI bytes in size...
943 */
944
945 strlcpy(con->uri, resource, sizeof(con->uri));
946 }
947
948 /*
949 * Process the request...
950 */
951
952 if (!strcmp(operation, "GET"))
953 con->http.state = HTTP_STATE_GET;
954 else if (!strcmp(operation, "PUT"))
955 con->http.state = HTTP_STATE_PUT;
956 else if (!strcmp(operation, "POST"))
957 con->http.state = HTTP_STATE_POST;
958 else if (!strcmp(operation, "DELETE"))
959 con->http.state = HTTP_STATE_DELETE;
960 else if (!strcmp(operation, "TRACE"))
961 con->http.state = HTTP_STATE_TRACE;
962 else if (!strcmp(operation, "OPTIONS"))
963 con->http.state = HTTP_STATE_OPTIONS;
964 else if (!strcmp(operation, "HEAD"))
965 con->http.state = HTTP_STATE_HEAD;
966 else
967 {
968 cupsdLogMessage(CUPSD_LOG_ERROR,
969 "[Client %d] Bad operation \"%s\".", con->http.fd,
970 operation);
971 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
972 cupsdCloseClient(con);
973 return;
974 }
975
976 gettimeofday(&(con->start), NULL);
977 con->operation = con->http.state;
978
979 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] %s %s HTTP/%d.%d",
980 con->http.fd, operation, con->uri,
981 con->http.version / 100, con->http.version % 100);
982
983 con->http.status = HTTP_OK;
984
985 if (!cupsArrayFind(ActiveClients, con))
986 {
987 cupsArrayAdd(ActiveClients, con);
988 cupsdSetBusyState();
989 }
990
991 case HTTP_STATE_OPTIONS :
992 case HTTP_STATE_DELETE :
993 case HTTP_STATE_GET :
994 case HTTP_STATE_HEAD :
995 case HTTP_STATE_POST :
996 case HTTP_STATE_PUT :
997 case HTTP_STATE_TRACE :
998 /*
999 * Parse incoming parameters until the status changes...
1000 */
1001
1002 while ((status = httpUpdate(HTTP(con))) == HTTP_CONTINUE)
1003 if (!data_ready(con))
1004 break;
1005
1006 if (status != HTTP_OK && status != HTTP_CONTINUE)
1007 {
1008 if (con->http.error && con->http.error != EPIPE)
1009 cupsdLogMessage(CUPSD_LOG_DEBUG,
1010 "[Client %d] Closing for error %d (%s) while "
1011 "reading headers.",
1012 con->http.fd, con->http.error,
1013 strerror(con->http.error));
1014 else
1015 cupsdLogMessage(CUPSD_LOG_DEBUG,
1016 "[Client %d] Closing on EOF while reading headers.",
1017 con->http.fd);
1018
1019 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
1020 cupsdCloseClient(con);
1021 return;
1022 }
1023 break;
1024
1025 default :
1026 if (!data_ready(con) && recv(con->http.fd, buf, 1, MSG_PEEK) < 1)
1027 {
1028 /*
1029 * Connection closed...
1030 */
1031
1032 cupsdLogMessage(CUPSD_LOG_DEBUG,
1033 "[Client %d] Closing on EOF", con->http.fd);
1034 cupsdCloseClient(con);
1035 return;
1036 }
1037 break; /* Anti-compiler-warning-code */
1038 }
1039
1040 /*
1041 * Handle new transfers...
1042 */
1043
1044 if (status == HTTP_OK)
1045 {
1046 if (con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE][0])
1047 {
1048 /*
1049 * Figure out the locale from the Accept-Language and Content-Type
1050 * fields...
1051 */
1052
1053 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE],
1054 ',')) != NULL)
1055 *ptr = '\0';
1056
1057 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE],
1058 ';')) != NULL)
1059 *ptr = '\0';
1060
1061 if ((ptr = strstr(con->http.fields[HTTP_FIELD_CONTENT_TYPE],
1062 "charset=")) != NULL)
1063 {
1064 /*
1065 * Combine language and charset, and trim any extra params in the
1066 * content-type.
1067 */
1068
1069 snprintf(locale, sizeof(locale), "%s.%s",
1070 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], ptr + 8);
1071
1072 if ((ptr = strchr(locale, ',')) != NULL)
1073 *ptr = '\0';
1074 }
1075 else
1076 snprintf(locale, sizeof(locale), "%s.UTF-8",
1077 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE]);
1078
1079 con->language = cupsLangGet(locale);
1080 }
1081 else
1082 con->language = cupsLangGet(DefaultLocale);
1083
1084 cupsdAuthorize(con);
1085
1086 if (!_cups_strncasecmp(con->http.fields[HTTP_FIELD_CONNECTION],
1087 "Keep-Alive", 10) && KeepAlive)
1088 con->http.keep_alive = HTTP_KEEPALIVE_ON;
1089 else if (!_cups_strncasecmp(con->http.fields[HTTP_FIELD_CONNECTION],
1090 "close", 5))
1091 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1092
1093 if (!con->http.fields[HTTP_FIELD_HOST][0] &&
1094 con->http.version >= HTTP_1_1)
1095 {
1096 /*
1097 * HTTP/1.1 and higher require the "Host:" field...
1098 */
1099
1100 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1101 {
1102 cupsdLogMessage(CUPSD_LOG_ERROR,
1103 "[Client %d] Missing Host: field in request.",
1104 con->http.fd);
1105 cupsdCloseClient(con);
1106 return;
1107 }
1108 }
1109 else if (!valid_host(con))
1110 {
1111 /*
1112 * Access to localhost must use "localhost" or the corresponding IPv4
1113 * or IPv6 values in the Host: field.
1114 */
1115
1116 cupsdLogMessage(CUPSD_LOG_ERROR,
1117 "[Client %d] Request from \"%s\" using invalid Host: "
1118 "field \"%s\"", con->http.fd, con->http.hostname,
1119 con->http.fields[HTTP_FIELD_HOST]);
1120
1121 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1122 {
1123 cupsdCloseClient(con);
1124 return;
1125 }
1126 }
1127 else if (con->operation == HTTP_STATE_OPTIONS)
1128 {
1129 /*
1130 * Do OPTIONS command...
1131 */
1132
1133 if (con->best && con->best->type != CUPSD_AUTH_NONE)
1134 {
1135 if (!cupsdSendHeader(con, HTTP_UNAUTHORIZED, NULL, CUPSD_AUTH_NONE))
1136 {
1137 cupsdCloseClient(con);
1138 return;
1139 }
1140 }
1141
1142 if (!_cups_strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Upgrade") &&
1143 con->http.tls == NULL)
1144 {
1145 #ifdef HAVE_SSL
1146 /*
1147 * Do encryption stuff...
1148 */
1149
1150 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL, CUPSD_AUTH_NONE))
1151 {
1152 cupsdCloseClient(con);
1153 return;
1154 }
1155
1156 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1157 httpPrintf(HTTP(con), "Upgrade: TLS/1.2,TLS/1.1,TLS/1.0\r\n");
1158 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1159 httpPrintf(HTTP(con), "\r\n");
1160
1161 if (cupsdFlushHeader(con) < 0)
1162 {
1163 cupsdCloseClient(con);
1164 return;
1165 }
1166
1167 if (!cupsdStartTLS(con))
1168 {
1169 cupsdCloseClient(con);
1170 return;
1171 }
1172 #else
1173 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE))
1174 {
1175 cupsdCloseClient(con);
1176 return;
1177 }
1178 #endif /* HAVE_SSL */
1179 }
1180
1181 if (!cupsdSendHeader(con, HTTP_OK, NULL, CUPSD_AUTH_NONE))
1182 {
1183 cupsdCloseClient(con);
1184 return;
1185 }
1186
1187 httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST, PUT\r\n");
1188 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1189 httpPrintf(HTTP(con), "\r\n");
1190
1191 if (cupsdFlushHeader(con) < 0)
1192 {
1193 cupsdCloseClient(con);
1194 return;
1195 }
1196 }
1197 else if (!is_path_absolute(con->uri))
1198 {
1199 /*
1200 * Protect against malicious users!
1201 */
1202
1203 cupsdLogMessage(CUPSD_LOG_ERROR,
1204 "[Client %d] Request for non-absolute resource \"%s\".",
1205 con->http.fd, con->uri);
1206
1207 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1208 {
1209 cupsdCloseClient(con);
1210 return;
1211 }
1212 }
1213 else
1214 {
1215 if (!_cups_strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION],
1216 "Upgrade") && con->http.tls == NULL)
1217 {
1218 #ifdef HAVE_SSL
1219 /*
1220 * Do encryption stuff...
1221 */
1222
1223 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL,
1224 CUPSD_AUTH_NONE))
1225 {
1226 cupsdCloseClient(con);
1227 return;
1228 }
1229
1230 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1231 httpPrintf(HTTP(con), "Upgrade: TLS/1.2,TLS/1.1,TLS/1.0\r\n");
1232 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1233 httpPrintf(HTTP(con), "\r\n");
1234
1235 if (cupsdFlushHeader(con) < 0)
1236 {
1237 cupsdCloseClient(con);
1238 return;
1239 }
1240
1241 if (!cupsdStartTLS(con))
1242 {
1243 cupsdCloseClient(con);
1244 return;
1245 }
1246 #else
1247 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE))
1248 {
1249 cupsdCloseClient(con);
1250 return;
1251 }
1252 #endif /* HAVE_SSL */
1253 }
1254
1255 if ((status = cupsdIsAuthorized(con, NULL)) != HTTP_OK)
1256 {
1257 cupsdSendError(con, status, CUPSD_AUTH_NONE);
1258 cupsdCloseClient(con);
1259 return;
1260 }
1261
1262 if (con->http.expect &&
1263 (con->operation == HTTP_STATE_POST || con->operation == HTTP_STATE_PUT))
1264 {
1265 if (con->http.expect == HTTP_CONTINUE)
1266 {
1267 /*
1268 * Send 100-continue header...
1269 */
1270
1271 if (!cupsdSendHeader(con, HTTP_CONTINUE, NULL, CUPSD_AUTH_NONE))
1272 {
1273 cupsdCloseClient(con);
1274 return;
1275 }
1276 }
1277 else
1278 {
1279 /*
1280 * Send 417-expectation-failed header...
1281 */
1282
1283 if (!cupsdSendHeader(con, HTTP_EXPECTATION_FAILED, NULL,
1284 CUPSD_AUTH_NONE))
1285 {
1286 cupsdCloseClient(con);
1287 return;
1288 }
1289
1290 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1291 httpPrintf(HTTP(con), "\r\n");
1292
1293 if (cupsdFlushHeader(con) < 0)
1294 {
1295 cupsdCloseClient(con);
1296 return;
1297 }
1298 }
1299 }
1300
1301 switch (con->http.state)
1302 {
1303 case HTTP_STATE_GET_SEND :
1304 if ((!strncmp(con->uri, "/ppd/", 5) ||
1305 !strncmp(con->uri, "/printers/", 10) ||
1306 !strncmp(con->uri, "/classes/", 9)) &&
1307 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1308 {
1309 /*
1310 * Send PPD file - get the real printer name since printer
1311 * names are not case sensitive but filenames can be...
1312 */
1313
1314 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1315
1316 if (!strncmp(con->uri, "/ppd/", 5))
1317 p = cupsdFindPrinter(con->uri + 5);
1318 else if (!strncmp(con->uri, "/printers/", 10))
1319 p = cupsdFindPrinter(con->uri + 10);
1320 else
1321 {
1322 p = cupsdFindClass(con->uri + 9);
1323
1324 if (p)
1325 {
1326 int i; /* Looping var */
1327
1328 for (i = 0; i < p->num_printers; i ++)
1329 {
1330 if (!(p->printers[i]->type & CUPS_PRINTER_CLASS))
1331 {
1332 char ppdname[1024];/* PPD filename */
1333
1334 snprintf(ppdname, sizeof(ppdname), "%s/ppd/%s.ppd",
1335 ServerRoot, p->printers[i]->name);
1336 if (!access(ppdname, 0))
1337 {
1338 p = p->printers[i];
1339 break;
1340 }
1341 }
1342 }
1343
1344 if (i >= p->num_printers)
1345 p = NULL;
1346 }
1347 }
1348
1349 if (p)
1350 {
1351 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1352 }
1353 else
1354 {
1355 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1356 {
1357 cupsdCloseClient(con);
1358 return;
1359 }
1360
1361 break;
1362 }
1363 }
1364 else if ((!strncmp(con->uri, "/icons/", 7) ||
1365 !strncmp(con->uri, "/printers/", 10) ||
1366 !strncmp(con->uri, "/classes/", 9)) &&
1367 !strcmp(con->uri + strlen(con->uri) - 4, ".png"))
1368 {
1369 /*
1370 * Send icon file - get the real queue name since queue names are
1371 * not case sensitive but filenames can be...
1372 */
1373
1374 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".png" */
1375
1376 if (!strncmp(con->uri, "/icons/", 7))
1377 p = cupsdFindPrinter(con->uri + 7);
1378 else if (!strncmp(con->uri, "/printers/", 10))
1379 p = cupsdFindPrinter(con->uri + 10);
1380 else
1381 {
1382 p = cupsdFindClass(con->uri + 9);
1383
1384 if (p)
1385 {
1386 int i; /* Looping var */
1387
1388 for (i = 0; i < p->num_printers; i ++)
1389 {
1390 if (!(p->printers[i]->type & CUPS_PRINTER_CLASS))
1391 {
1392 char ppdname[1024];/* PPD filename */
1393
1394 snprintf(ppdname, sizeof(ppdname), "%s/ppd/%s.ppd",
1395 ServerRoot, p->printers[i]->name);
1396 if (!access(ppdname, 0))
1397 {
1398 p = p->printers[i];
1399 break;
1400 }
1401 }
1402 }
1403
1404 if (i >= p->num_printers)
1405 p = NULL;
1406 }
1407 }
1408
1409 if (p)
1410 snprintf(con->uri, sizeof(con->uri), "/icons/%s.png", p->name);
1411 else
1412 {
1413 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1414 {
1415 cupsdCloseClient(con);
1416 return;
1417 }
1418
1419 break;
1420 }
1421 }
1422 else if (!WebInterface)
1423 {
1424 /*
1425 * Web interface is disabled. Show an appropriate message...
1426 */
1427
1428 if (!cupsdSendError(con, HTTP_WEBIF_DISABLED, CUPSD_AUTH_NONE))
1429 {
1430 cupsdCloseClient(con);
1431 return;
1432 }
1433
1434 break;
1435 }
1436
1437 if ((!strncmp(con->uri, "/admin", 6) &&
1438 strncmp(con->uri, "/admin/conf/", 12) &&
1439 strncmp(con->uri, "/admin/log/", 11)) ||
1440 !strncmp(con->uri, "/printers", 9) ||
1441 !strncmp(con->uri, "/classes", 8) ||
1442 !strncmp(con->uri, "/help", 5) ||
1443 !strncmp(con->uri, "/jobs", 5))
1444 {
1445 /*
1446 * Send CGI output...
1447 */
1448
1449 if (!strncmp(con->uri, "/admin", 6))
1450 {
1451 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1452 ServerBin);
1453
1454 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1455 }
1456 else if (!strncmp(con->uri, "/printers", 9))
1457 {
1458 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1459 ServerBin);
1460
1461 if (con->uri[9] && con->uri[10])
1462 cupsdSetString(&con->options, con->uri + 9);
1463 else
1464 cupsdSetString(&con->options, NULL);
1465 }
1466 else if (!strncmp(con->uri, "/classes", 8))
1467 {
1468 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1469 ServerBin);
1470
1471 if (con->uri[8] && con->uri[9])
1472 cupsdSetString(&con->options, con->uri + 8);
1473 else
1474 cupsdSetString(&con->options, NULL);
1475 }
1476 else if (!strncmp(con->uri, "/jobs", 5))
1477 {
1478 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1479 ServerBin);
1480
1481 if (con->uri[5] && con->uri[6])
1482 cupsdSetString(&con->options, con->uri + 5);
1483 else
1484 cupsdSetString(&con->options, NULL);
1485 }
1486 else
1487 {
1488 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1489 ServerBin);
1490
1491 if (con->uri[5] && con->uri[6])
1492 cupsdSetString(&con->options, con->uri + 5);
1493 else
1494 cupsdSetString(&con->options, NULL);
1495 }
1496
1497 if (!cupsdSendCommand(con, con->command, con->options, 0))
1498 {
1499 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1500 {
1501 cupsdCloseClient(con);
1502 return;
1503 }
1504 }
1505 else
1506 cupsdLogRequest(con, HTTP_OK);
1507
1508 if (con->http.version <= HTTP_1_0)
1509 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1510 }
1511 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1512 (strchr(con->uri + 12, '/') ||
1513 strlen(con->uri) == 12)) ||
1514 (!strncmp(con->uri, "/admin/log/", 11) &&
1515 (strchr(con->uri + 11, '/') ||
1516 strlen(con->uri) == 11)))
1517 {
1518 /*
1519 * GET can only be done to configuration files directly under
1520 * /admin/conf...
1521 */
1522
1523 cupsdLogMessage(CUPSD_LOG_ERROR,
1524 "Request for subdirectory \"%s\"!", con->uri);
1525
1526 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1527 {
1528 cupsdCloseClient(con);
1529 return;
1530 }
1531
1532 break;
1533 }
1534 else
1535 {
1536 /*
1537 * Serve a file...
1538 */
1539
1540 if ((filename = get_file(con, &filestats, buf,
1541 sizeof(buf))) == NULL)
1542 {
1543 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1544 {
1545 cupsdCloseClient(con);
1546 return;
1547 }
1548
1549 break;
1550 }
1551
1552 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1553
1554 if (is_cgi(con, filename, &filestats, type))
1555 {
1556 /*
1557 * Note: con->command and con->options were set by
1558 * is_cgi()...
1559 */
1560
1561 if (!cupsdSendCommand(con, con->command, con->options, 0))
1562 {
1563 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1564 {
1565 cupsdCloseClient(con);
1566 return;
1567 }
1568 }
1569 else
1570 cupsdLogRequest(con, HTTP_OK);
1571
1572 if (con->http.version <= HTTP_1_0)
1573 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1574 break;
1575 }
1576
1577 if (!check_if_modified(con, &filestats))
1578 {
1579 if (!cupsdSendError(con, HTTP_NOT_MODIFIED, CUPSD_AUTH_NONE))
1580 {
1581 cupsdCloseClient(con);
1582 return;
1583 }
1584 }
1585 else
1586 {
1587 if (type == NULL)
1588 strlcpy(line, "text/plain", sizeof(line));
1589 else
1590 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1591
1592 if (!write_file(con, HTTP_OK, filename, line, &filestats))
1593 {
1594 cupsdCloseClient(con);
1595 return;
1596 }
1597 }
1598 }
1599 break;
1600
1601 case HTTP_STATE_POST_RECV :
1602 /*
1603 * See if the POST request includes a Content-Length field, and if
1604 * so check the length against any limits that are set...
1605 */
1606
1607 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1608 MaxRequestSize > 0 &&
1609 con->http.data_remaining > MaxRequestSize)
1610 {
1611 /*
1612 * Request too large...
1613 */
1614
1615 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1616 {
1617 cupsdCloseClient(con);
1618 return;
1619 }
1620
1621 break;
1622 }
1623 else if (con->http.data_remaining < 0 ||
1624 (!con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1625 con->http.data_encoding == HTTP_ENCODING_LENGTH))
1626 {
1627 /*
1628 * Negative content lengths are invalid!
1629 */
1630
1631 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1632 {
1633 cupsdCloseClient(con);
1634 return;
1635 }
1636
1637 break;
1638 }
1639
1640 /*
1641 * See what kind of POST request this is; for IPP requests the
1642 * content-type field will be "application/ipp"...
1643 */
1644
1645 if (!strcmp(con->http.fields[HTTP_FIELD_CONTENT_TYPE],
1646 "application/ipp"))
1647 con->request = ippNew();
1648 else if (!WebInterface)
1649 {
1650 /*
1651 * Web interface is disabled. Show an appropriate message...
1652 */
1653
1654 if (!cupsdSendError(con, HTTP_WEBIF_DISABLED, CUPSD_AUTH_NONE))
1655 {
1656 cupsdCloseClient(con);
1657 return;
1658 }
1659
1660 break;
1661 }
1662 else if ((!strncmp(con->uri, "/admin", 6) &&
1663 strncmp(con->uri, "/admin/conf/", 12) &&
1664 strncmp(con->uri, "/admin/log/", 11)) ||
1665 !strncmp(con->uri, "/printers", 9) ||
1666 !strncmp(con->uri, "/classes", 8) ||
1667 !strncmp(con->uri, "/help", 5) ||
1668 !strncmp(con->uri, "/jobs", 5))
1669 {
1670 /*
1671 * CGI request...
1672 */
1673
1674 if (!strncmp(con->uri, "/admin", 6))
1675 {
1676 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1677 ServerBin);
1678
1679 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1680 }
1681 else if (!strncmp(con->uri, "/printers", 9))
1682 {
1683 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1684 ServerBin);
1685
1686 if (con->uri[9] && con->uri[10])
1687 cupsdSetString(&con->options, con->uri + 9);
1688 else
1689 cupsdSetString(&con->options, NULL);
1690 }
1691 else if (!strncmp(con->uri, "/classes", 8))
1692 {
1693 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1694 ServerBin);
1695
1696 if (con->uri[8] && con->uri[9])
1697 cupsdSetString(&con->options, con->uri + 8);
1698 else
1699 cupsdSetString(&con->options, NULL);
1700 }
1701 else if (!strncmp(con->uri, "/jobs", 5))
1702 {
1703 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1704 ServerBin);
1705
1706 if (con->uri[5] && con->uri[6])
1707 cupsdSetString(&con->options, con->uri + 5);
1708 else
1709 cupsdSetString(&con->options, NULL);
1710 }
1711 else
1712 {
1713 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1714 ServerBin);
1715
1716 if (con->uri[5] && con->uri[6])
1717 cupsdSetString(&con->options, con->uri + 5);
1718 else
1719 cupsdSetString(&con->options, NULL);
1720 }
1721
1722 if (con->http.version <= HTTP_1_0)
1723 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1724 }
1725 else
1726 {
1727 /*
1728 * POST to a file...
1729 */
1730
1731 if ((filename = get_file(con, &filestats, buf,
1732 sizeof(buf))) == NULL)
1733 {
1734 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1735 {
1736 cupsdCloseClient(con);
1737 return;
1738 }
1739
1740 break;
1741 }
1742
1743 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1744
1745 if (!is_cgi(con, filename, &filestats, type))
1746 {
1747 /*
1748 * Only POST to CGI's...
1749 */
1750
1751 if (!cupsdSendError(con, HTTP_UNAUTHORIZED, CUPSD_AUTH_NONE))
1752 {
1753 cupsdCloseClient(con);
1754 return;
1755 }
1756 }
1757 }
1758 break;
1759
1760 case HTTP_STATE_PUT_RECV :
1761 /*
1762 * Validate the resource name...
1763 */
1764
1765 if (strcmp(con->uri, "/admin/conf/cupsd.conf"))
1766 {
1767 /*
1768 * PUT can only be done to the cupsd.conf file...
1769 */
1770
1771 cupsdLogMessage(CUPSD_LOG_ERROR,
1772 "[Client %d] Disallowed PUT request for \"%s\".",
1773 con->http.fd, con->uri);
1774
1775 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1776 {
1777 cupsdCloseClient(con);
1778 return;
1779 }
1780
1781 break;
1782 }
1783
1784 /*
1785 * See if the PUT request includes a Content-Length field, and if
1786 * so check the length against any limits that are set...
1787 */
1788
1789 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1790 MaxRequestSize > 0 &&
1791 con->http.data_remaining > MaxRequestSize)
1792 {
1793 /*
1794 * Request too large...
1795 */
1796
1797 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1798 {
1799 cupsdCloseClient(con);
1800 return;
1801 }
1802
1803 break;
1804 }
1805 else if (con->http.data_remaining < 0)
1806 {
1807 /*
1808 * Negative content lengths are invalid!
1809 */
1810
1811 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1812 {
1813 cupsdCloseClient(con);
1814 return;
1815 }
1816
1817 break;
1818 }
1819
1820 /*
1821 * Open a temporary file to hold the request...
1822 */
1823
1824 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot,
1825 request_id ++);
1826 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
1827
1828 if (con->file < 0)
1829 {
1830 cupsdLogMessage(CUPSD_LOG_ERROR,
1831 "[Client %d] Unable to create request file "
1832 "\"%s\": %s", con->http.fd, con->filename,
1833 strerror(errno));
1834
1835 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1836 {
1837 cupsdCloseClient(con);
1838 return;
1839 }
1840 }
1841
1842 fchmod(con->file, 0640);
1843 fchown(con->file, RunUser, Group);
1844 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
1845 break;
1846
1847 case HTTP_STATE_DELETE :
1848 case HTTP_STATE_TRACE :
1849 cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE);
1850 cupsdCloseClient(con);
1851 return;
1852
1853 case HTTP_STATE_HEAD :
1854 if (!strncmp(con->uri, "/printers/", 10) &&
1855 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1856 {
1857 /*
1858 * Send PPD file - get the real printer name since printer
1859 * names are not case sensitive but filenames can be...
1860 */
1861
1862 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1863
1864 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1865 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1866 else
1867 {
1868 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1869 {
1870 cupsdCloseClient(con);
1871 return;
1872 }
1873
1874 break;
1875 }
1876 }
1877 else if (!strncmp(con->uri, "/printers/", 10) &&
1878 !strcmp(con->uri + strlen(con->uri) - 4, ".png"))
1879 {
1880 /*
1881 * Send PNG file - get the real printer name since printer
1882 * names are not case sensitive but filenames can be...
1883 */
1884
1885 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1886
1887 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1888 snprintf(con->uri, sizeof(con->uri), "/icons/%s.png", p->name);
1889 else
1890 {
1891 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1892 {
1893 cupsdCloseClient(con);
1894 return;
1895 }
1896
1897 break;
1898 }
1899 }
1900 else if (!WebInterface)
1901 {
1902 if (!cupsdSendHeader(con, HTTP_OK, line, CUPSD_AUTH_NONE))
1903 {
1904 cupsdCloseClient(con);
1905 return;
1906 }
1907
1908 if (httpPrintf(HTTP(con), "\r\n") < 0)
1909 {
1910 cupsdCloseClient(con);
1911 return;
1912 }
1913
1914 if (cupsdFlushHeader(con) < 0)
1915 {
1916 cupsdCloseClient(con);
1917 return;
1918 }
1919
1920 con->http.state = HTTP_STATE_WAITING;
1921 DEBUG_puts("cupsdReadClient: Set state to HTTP_STATE_WAITING "
1922 "after HEAD.");
1923 break;
1924 }
1925
1926 if ((!strncmp(con->uri, "/admin", 6) &&
1927 strncmp(con->uri, "/admin/conf/", 12) &&
1928 strncmp(con->uri, "/admin/log/", 11)) ||
1929 !strncmp(con->uri, "/printers", 9) ||
1930 !strncmp(con->uri, "/classes", 8) ||
1931 !strncmp(con->uri, "/help", 5) ||
1932 !strncmp(con->uri, "/jobs", 5))
1933 {
1934 /*
1935 * CGI output...
1936 */
1937
1938 if (!cupsdSendHeader(con, HTTP_OK, "text/html", CUPSD_AUTH_NONE))
1939 {
1940 cupsdCloseClient(con);
1941 return;
1942 }
1943
1944 if (httpPrintf(HTTP(con), "\r\n") < 0)
1945 {
1946 cupsdCloseClient(con);
1947 return;
1948 }
1949
1950 if (cupsdFlushHeader(con) < 0)
1951 {
1952 cupsdCloseClient(con);
1953 return;
1954 }
1955
1956 cupsdLogRequest(con, HTTP_OK);
1957 }
1958 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1959 (strchr(con->uri + 12, '/') ||
1960 strlen(con->uri) == 12)) ||
1961 (!strncmp(con->uri, "/admin/log/", 11) &&
1962 (strchr(con->uri + 11, '/') ||
1963 strlen(con->uri) == 11)))
1964 {
1965 /*
1966 * HEAD can only be done to configuration files under
1967 * /admin/conf...
1968 */
1969
1970 cupsdLogMessage(CUPSD_LOG_ERROR,
1971 "[Client %d] Request for subdirectory \"%s\".",
1972 con->http.fd, con->uri);
1973
1974 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1975 {
1976 cupsdCloseClient(con);
1977 return;
1978 }
1979
1980 break;
1981 }
1982 else if ((filename = get_file(con, &filestats, buf,
1983 sizeof(buf))) == NULL)
1984 {
1985 if (!cupsdSendHeader(con, HTTP_NOT_FOUND, "text/html",
1986 CUPSD_AUTH_NONE))
1987 {
1988 cupsdCloseClient(con);
1989 return;
1990 }
1991
1992 cupsdLogRequest(con, HTTP_NOT_FOUND);
1993 }
1994 else if (!check_if_modified(con, &filestats))
1995 {
1996 if (!cupsdSendError(con, HTTP_NOT_MODIFIED, CUPSD_AUTH_NONE))
1997 {
1998 cupsdCloseClient(con);
1999 return;
2000 }
2001
2002 cupsdLogRequest(con, HTTP_NOT_MODIFIED);
2003 }
2004 else
2005 {
2006 /*
2007 * Serve a file...
2008 */
2009
2010 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
2011 if (type == NULL)
2012 strlcpy(line, "text/plain", sizeof(line));
2013 else
2014 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
2015
2016 if (!cupsdSendHeader(con, HTTP_OK, line, CUPSD_AUTH_NONE))
2017 {
2018 cupsdCloseClient(con);
2019 return;
2020 }
2021
2022 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
2023 httpGetDateString(filestats.st_mtime)) < 0)
2024 {
2025 cupsdCloseClient(con);
2026 return;
2027 }
2028
2029 if (httpPrintf(HTTP(con), "Content-Length: %lu\r\n",
2030 (unsigned long)filestats.st_size) < 0)
2031 {
2032 cupsdCloseClient(con);
2033 return;
2034 }
2035
2036 cupsdLogRequest(con, HTTP_OK);
2037 }
2038
2039 if (httpPrintf(HTTP(con), "\r\n") < 0)
2040 {
2041 cupsdCloseClient(con);
2042 return;
2043 }
2044
2045 if (cupsdFlushHeader(con) < 0)
2046 {
2047 cupsdCloseClient(con);
2048 return;
2049 }
2050
2051 con->http.state = HTTP_STATE_WAITING;
2052 DEBUG_puts("cupsdReadClient: Set state to HTTP_STATE_WAITING "
2053 "after HEAD.");
2054 break;
2055
2056 default :
2057 break; /* Anti-compiler-warning-code */
2058 }
2059 }
2060 }
2061
2062 /*
2063 * Handle any incoming data...
2064 */
2065
2066 switch (con->http.state)
2067 {
2068 case HTTP_STATE_PUT_RECV :
2069 do
2070 {
2071 if ((bytes = httpRead2(HTTP(con), line, sizeof(line))) < 0)
2072 {
2073 if (con->http.error && con->http.error != EPIPE)
2074 cupsdLogMessage(CUPSD_LOG_DEBUG,
2075 "[Client %d] HTTP_STATE_PUT_RECV Closing for error "
2076 "%d (%s)", con->http.fd, con->http.error,
2077 strerror(con->http.error));
2078 else
2079 cupsdLogMessage(CUPSD_LOG_DEBUG,
2080 "[Client %d] HTTP_STATE_PUT_RECV Closing on EOF",
2081 con->http.fd);
2082
2083 cupsdCloseClient(con);
2084 return;
2085 }
2086 else if (bytes > 0)
2087 {
2088 con->bytes += bytes;
2089
2090 if (write(con->file, line, bytes) < bytes)
2091 {
2092 cupsdLogMessage(CUPSD_LOG_ERROR,
2093 "[Client %d] Unable to write %d bytes to "
2094 "\"%s\": %s", con->http.fd, bytes, con->filename,
2095 strerror(errno));
2096
2097 close(con->file);
2098 con->file = -1;
2099 unlink(con->filename);
2100 cupsdClearString(&con->filename);
2101
2102 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2103 {
2104 cupsdCloseClient(con);
2105 return;
2106 }
2107 }
2108 }
2109 }
2110 while (con->http.state == HTTP_STATE_PUT_RECV && data_ready(con));
2111
2112 if (con->http.state == HTTP_STATE_STATUS)
2113 {
2114 /*
2115 * End of file, see how big it is...
2116 */
2117
2118 fstat(con->file, &filestats);
2119
2120 close(con->file);
2121 con->file = -1;
2122
2123 if (filestats.st_size > MaxRequestSize &&
2124 MaxRequestSize > 0)
2125 {
2126 /*
2127 * Request is too big; remove it and send an error...
2128 */
2129
2130 unlink(con->filename);
2131 cupsdClearString(&con->filename);
2132
2133 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2134 {
2135 cupsdCloseClient(con);
2136 return;
2137 }
2138 }
2139
2140 /*
2141 * Install the configuration file...
2142 */
2143
2144 status = install_cupsd_conf(con);
2145
2146 /*
2147 * Return the status to the client...
2148 */
2149
2150 if (!cupsdSendError(con, status, CUPSD_AUTH_NONE))
2151 {
2152 cupsdCloseClient(con);
2153 return;
2154 }
2155 }
2156 break;
2157
2158 case HTTP_STATE_POST_RECV :
2159 do
2160 {
2161 if (con->request && con->file < 0)
2162 {
2163 /*
2164 * Grab any request data from the connection...
2165 */
2166
2167 if ((ipp_state = ippRead(&(con->http), con->request)) == IPP_ERROR)
2168 {
2169 cupsdLogMessage(CUPSD_LOG_ERROR,
2170 "[Client %d] IPP read error: %s", con->http.fd,
2171 cupsLastErrorString());
2172
2173 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
2174 cupsdCloseClient(con);
2175 return;
2176 }
2177 else if (ipp_state != IPP_DATA)
2178 {
2179 if (con->http.state == HTTP_STATE_POST_SEND)
2180 {
2181 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
2182 cupsdCloseClient(con);
2183 return;
2184 }
2185
2186 if (data_ready(con))
2187 continue;
2188 break;
2189 }
2190 else
2191 {
2192 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] %d.%d %s %d",
2193 con->http.fd, con->request->request.op.version[0],
2194 con->request->request.op.version[1],
2195 ippOpString(con->request->request.op.operation_id),
2196 con->request->request.op.request_id);
2197 con->bytes += ippLength(con->request);
2198 }
2199 }
2200
2201 if (con->file < 0 && con->http.state != HTTP_STATE_POST_SEND)
2202 {
2203 /*
2204 * Create a file as needed for the request data...
2205 */
2206
2207 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot,
2208 request_id ++);
2209 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
2210
2211 if (con->file < 0)
2212 {
2213 cupsdLogMessage(CUPSD_LOG_ERROR,
2214 "[Client %d] Unable to create request file "
2215 "\"%s\": %s", con->http.fd, con->filename,
2216 strerror(errno));
2217
2218 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2219 {
2220 cupsdCloseClient(con);
2221 return;
2222 }
2223 }
2224
2225 fchmod(con->file, 0640);
2226 fchown(con->file, RunUser, Group);
2227 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2228 }
2229
2230 if (con->http.state != HTTP_STATE_POST_SEND)
2231 {
2232 if (!httpWait(HTTP(con), 0))
2233 return;
2234 else if ((bytes = httpRead2(HTTP(con), line, sizeof(line))) < 0)
2235 {
2236 if (con->http.error && con->http.error != EPIPE)
2237 cupsdLogMessage(CUPSD_LOG_DEBUG,
2238 "[Client %d] HTTP_STATE_POST_SEND Closing for "
2239 "error %d (%s)", con->http.fd, con->http.error,
2240 strerror(con->http.error));
2241 else
2242 cupsdLogMessage(CUPSD_LOG_DEBUG,
2243 "[Client %d] HTTP_STATE_POST_SEND Closing on EOF",
2244 con->http.fd);
2245
2246 cupsdCloseClient(con);
2247 return;
2248 }
2249 else if (bytes > 0)
2250 {
2251 con->bytes += bytes;
2252
2253 if (write(con->file, line, bytes) < bytes)
2254 {
2255 cupsdLogMessage(CUPSD_LOG_ERROR,
2256 "[Client %d] Unable to write %d bytes to "
2257 "\"%s\": %s", con->http.fd, bytes,
2258 con->filename, strerror(errno));
2259
2260 close(con->file);
2261 con->file = -1;
2262 unlink(con->filename);
2263 cupsdClearString(&con->filename);
2264
2265 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE,
2266 CUPSD_AUTH_NONE))
2267 {
2268 cupsdCloseClient(con);
2269 return;
2270 }
2271 }
2272 }
2273 else if (con->http.state == HTTP_STATE_POST_RECV)
2274 return;
2275 else if (con->http.state != HTTP_STATE_POST_SEND)
2276 {
2277 cupsdLogMessage(CUPSD_LOG_DEBUG,
2278 "[Client %d] Closing on unexpected state %s.",
2279 con->http.fd, http_states[con->http.state + 1]);
2280 cupsdCloseClient(con);
2281 return;
2282 }
2283 }
2284 }
2285 while (con->http.state == HTTP_STATE_POST_RECV && data_ready(con));
2286
2287 if (con->http.state == HTTP_STATE_POST_SEND)
2288 {
2289 if (con->file >= 0)
2290 {
2291 fstat(con->file, &filestats);
2292
2293 close(con->file);
2294 con->file = -1;
2295
2296 if (filestats.st_size > MaxRequestSize &&
2297 MaxRequestSize > 0)
2298 {
2299 /*
2300 * Request is too big; remove it and send an error...
2301 */
2302
2303 unlink(con->filename);
2304 cupsdClearString(&con->filename);
2305
2306 if (con->request)
2307 {
2308 /*
2309 * Delete any IPP request data...
2310 */
2311
2312 ippDelete(con->request);
2313 con->request = NULL;
2314 }
2315
2316 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2317 {
2318 cupsdCloseClient(con);
2319 return;
2320 }
2321 }
2322 else if (filestats.st_size == 0)
2323 {
2324 /*
2325 * Don't allow empty file...
2326 */
2327
2328 unlink(con->filename);
2329 cupsdClearString(&con->filename);
2330 }
2331
2332 if (con->command)
2333 {
2334 if (!cupsdSendCommand(con, con->command, con->options, 0))
2335 {
2336 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
2337 {
2338 cupsdCloseClient(con);
2339 return;
2340 }
2341 }
2342 else
2343 cupsdLogRequest(con, HTTP_OK);
2344 }
2345 }
2346
2347 if (con->request)
2348 {
2349 cupsdProcessIPPRequest(con);
2350
2351 if (con->filename)
2352 {
2353 unlink(con->filename);
2354 cupsdClearString(&con->filename);
2355 }
2356
2357 return;
2358 }
2359 }
2360 break;
2361
2362 default :
2363 break; /* Anti-compiler-warning-code */
2364 }
2365
2366 if (con->http.state == HTTP_STATE_WAITING)
2367 {
2368 if (!con->http.keep_alive)
2369 {
2370 cupsdLogMessage(CUPSD_LOG_DEBUG,
2371 "[Client %d] Closing because Keep-Alive disabled",
2372 con->http.fd);
2373 cupsdCloseClient(con);
2374 }
2375 else
2376 {
2377 cupsArrayRemove(ActiveClients, con);
2378 cupsdSetBusyState();
2379 }
2380 }
2381 }
2382
2383
2384 /*
2385 * 'cupsdSendCommand()' - Send output from a command via HTTP.
2386 */
2387
2388 int /* O - 1 on success, 0 on failure */
2389 cupsdSendCommand(
2390 cupsd_client_t *con, /* I - Client connection */
2391 char *command, /* I - Command to run */
2392 char *options, /* I - Command-line options */
2393 int root) /* I - Run as root? */
2394 {
2395 int fd; /* Standard input file descriptor */
2396
2397
2398 if (con->filename)
2399 {
2400 fd = open(con->filename, O_RDONLY);
2401
2402 if (fd < 0)
2403 {
2404 cupsdLogMessage(CUPSD_LOG_ERROR,
2405 "[Client %d] Unable to open \"%s\" for reading: %s",
2406 con->http.fd, con->filename ? con->filename : "/dev/null",
2407 strerror(errno));
2408 return (0);
2409 }
2410
2411 fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
2412 }
2413 else
2414 fd = -1;
2415
2416 con->pipe_pid = pipe_command(con, fd, &(con->file), command, options, root);
2417
2418 if (fd >= 0)
2419 close(fd);
2420
2421 cupsdLogMessage(CUPSD_LOG_INFO, "[Client %d] Started \"%s\" (pid=%d)",
2422 con->http.fd, command, con->pipe_pid);
2423
2424 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] file=%d", con->http.fd,
2425 con->file);
2426
2427 if (con->pipe_pid == 0)
2428 return (0);
2429
2430 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2431
2432 cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con);
2433
2434 con->sent_header = 0;
2435 con->file_ready = 0;
2436 con->got_fields = 0;
2437 con->header_used = 0;
2438
2439 return (1);
2440 }
2441
2442
2443 /*
2444 * 'cupsdSendError()' - Send an error message via HTTP.
2445 */
2446
2447 int /* O - 1 if successful, 0 otherwise */
2448 cupsdSendError(cupsd_client_t *con, /* I - Connection */
2449 http_status_t code, /* I - Error code */
2450 int auth_type)/* I - Authentication type */
2451 {
2452 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2453 "[Client %d] cupsdSendError code=%d, auth_type=%d",
2454 con->http.fd, code, auth_type);
2455
2456 #ifdef HAVE_SSL
2457 /*
2458 * Force client to upgrade for authentication if that is how the
2459 * server is configured...
2460 */
2461
2462 if (code == HTTP_UNAUTHORIZED &&
2463 DefaultEncryption == HTTP_ENCRYPT_REQUIRED &&
2464 _cups_strcasecmp(con->http.hostname, "localhost") &&
2465 !con->http.tls)
2466 {
2467 code = HTTP_UPGRADE_REQUIRED;
2468 }
2469 #endif /* HAVE_SSL */
2470
2471 /*
2472 * Put the request in the access_log file...
2473 */
2474
2475 cupsdLogRequest(con, code);
2476
2477 /*
2478 * To work around bugs in some proxies, don't use Keep-Alive for some
2479 * error messages...
2480 *
2481 * Kerberos authentication doesn't work without Keep-Alive, so
2482 * never disable it in that case.
2483 */
2484
2485 if (code >= HTTP_BAD_REQUEST && con->http.auth_type != CUPSD_AUTH_NEGOTIATE)
2486 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
2487
2488 /*
2489 * Send an error message back to the client. If the error code is a
2490 * 400 or 500 series, make sure the message contains some text, too!
2491 */
2492
2493 if (!cupsdSendHeader(con, code, NULL, auth_type))
2494 return (0);
2495
2496 #ifdef HAVE_SSL
2497 if (code == HTTP_UPGRADE_REQUIRED)
2498 if (httpPrintf(HTTP(con), "Connection: Upgrade\r\n") < 0)
2499 return (0);
2500
2501 if (httpPrintf(HTTP(con), "Upgrade: TLS/1.2,TLS/1.1,TLS/1.0\r\n") < 0)
2502 return (0);
2503 #endif /* HAVE_SSL */
2504
2505 if (con->http.version >= HTTP_1_1 &&
2506 con->http.keep_alive == HTTP_KEEPALIVE_OFF)
2507 {
2508 if (httpPrintf(HTTP(con), "Connection: close\r\n") < 0)
2509 return (0);
2510 }
2511
2512 if (code >= HTTP_BAD_REQUEST)
2513 {
2514 /*
2515 * Send a human-readable error message.
2516 */
2517
2518 char message[4096], /* Message for user */
2519 urltext[1024], /* URL redirection text */
2520 redirect[1024]; /* Redirection link */
2521 const char *text; /* Status-specific text */
2522
2523
2524 redirect[0] = '\0';
2525
2526 if (code == HTTP_UNAUTHORIZED)
2527 text = _cupsLangString(con->language,
2528 _("Enter your username and password or the "
2529 "root username and password to access this "
2530 "page. If you are using Kerberos authentication, "
2531 "make sure you have a valid Kerberos ticket."));
2532 else if (code == HTTP_UPGRADE_REQUIRED)
2533 {
2534 text = urltext;
2535
2536 snprintf(urltext, sizeof(urltext),
2537 _cupsLangString(con->language,
2538 _("You must access this page using the URL "
2539 "<A HREF=\"https://%s:%d%s\">"
2540 "https://%s:%d%s</A>.")),
2541 con->servername, con->serverport, con->uri,
2542 con->servername, con->serverport, con->uri);
2543
2544 snprintf(redirect, sizeof(redirect),
2545 "<META HTTP-EQUIV=\"Refresh\" "
2546 "CONTENT=\"3;URL=https://%s:%d%s\">\n",
2547 con->servername, con->serverport, con->uri);
2548 }
2549 else if (code == HTTP_WEBIF_DISABLED)
2550 text = _cupsLangString(con->language,
2551 _("The web interface is currently disabled. Run "
2552 "\"cupsctl WebInterface=yes\" to enable it."));
2553 else
2554 text = "";
2555
2556 snprintf(message, sizeof(message),
2557 "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" "
2558 "\"http://www.w3.org/TR/html4/loose.dtd\">\n"
2559 "<HTML>\n"
2560 "<HEAD>\n"
2561 "\t<META HTTP-EQUIV=\"Content-Type\" "
2562 "CONTENT=\"text/html; charset=utf-8\">\n"
2563 "\t<TITLE>%s - " CUPS_SVERSION "</TITLE>\n"
2564 "\t<LINK REL=\"STYLESHEET\" TYPE=\"text/css\" "
2565 "HREF=\"/cups.css\">\n"
2566 "%s"
2567 "</HEAD>\n"
2568 "<BODY>\n"
2569 "<H1>%s</H1>\n"
2570 "<P>%s</P>\n"
2571 "</BODY>\n"
2572 "</HTML>\n",
2573 httpStatus(code), redirect, httpStatus(code), text);
2574
2575 if (httpPrintf(HTTP(con), "Content-Type: text/html; charset=utf-8\r\n") < 0)
2576 return (0);
2577 if (httpPrintf(HTTP(con), "Content-Length: %d\r\n",
2578 (int)strlen(message)) < 0)
2579 return (0);
2580 if (httpPrintf(HTTP(con), "\r\n") < 0)
2581 return (0);
2582 if (httpPrintf(HTTP(con), "%s", message) < 0)
2583 return (0);
2584 }
2585 else if (httpPrintf(HTTP(con), "\r\n") < 0)
2586 return (0);
2587
2588 if (cupsdFlushHeader(con) < 0)
2589 return (0);
2590
2591 con->http.state = HTTP_STATE_WAITING;
2592
2593 DEBUG_puts("cupsdSendError: Set state to HTTP_STATE_WAITING.");
2594
2595 return (1);
2596 }
2597
2598
2599 /*
2600 * 'cupsdSendHeader()' - Send an HTTP request.
2601 */
2602
2603 int /* O - 1 on success, 0 on failure */
2604 cupsdSendHeader(
2605 cupsd_client_t *con, /* I - Client to send to */
2606 http_status_t code, /* I - HTTP status code */
2607 char *type, /* I - MIME type of document */
2608 int auth_type) /* I - Type of authentication */
2609 {
2610 char auth_str[1024]; /* Authorization string */
2611
2612
2613 /*
2614 * Send the HTTP status header...
2615 */
2616
2617 if (code == HTTP_CONTINUE)
2618 {
2619 /*
2620 * 100-continue doesn't send any headers...
2621 */
2622
2623 return (httpPrintf(HTTP(con), "HTTP/%d.%d 100 Continue\r\n\r\n",
2624 con->http.version / 100, con->http.version % 100) > 0);
2625 }
2626 else if (code == HTTP_WEBIF_DISABLED)
2627 {
2628 /*
2629 * Treat our special "web interface is disabled" status as "200 OK" for web
2630 * browsers.
2631 */
2632
2633 code = HTTP_OK;
2634 }
2635
2636 httpFlushWrite(HTTP(con));
2637
2638 con->http.data_encoding = HTTP_ENCODING_FIELDS;
2639
2640 if (httpPrintf(HTTP(con), "HTTP/%d.%d %d %s\r\n", con->http.version / 100,
2641 con->http.version % 100, code, httpStatus(code)) < 0)
2642 return (0);
2643 if (httpPrintf(HTTP(con), "Date: %s\r\n", httpGetDateString(time(NULL))) < 0)
2644 return (0);
2645 if (ServerHeader)
2646 if (httpPrintf(HTTP(con), "Server: %s\r\n", ServerHeader) < 0)
2647 return (0);
2648 if (con->http.keep_alive && con->http.version >= HTTP_1_0)
2649 {
2650 if (httpPrintf(HTTP(con), "Connection: Keep-Alive\r\n") < 0)
2651 return (0);
2652 if (httpPrintf(HTTP(con), "Keep-Alive: timeout=%d\r\n",
2653 KeepAliveTimeout) < 0)
2654 return (0);
2655 }
2656 if (code == HTTP_METHOD_NOT_ALLOWED)
2657 if (httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST, PUT\r\n") < 0)
2658 return (0);
2659
2660 if (code == HTTP_UNAUTHORIZED)
2661 {
2662 if (auth_type == CUPSD_AUTH_NONE)
2663 {
2664 if (!con->best || con->best->type <= CUPSD_AUTH_NONE)
2665 auth_type = cupsdDefaultAuthType();
2666 else
2667 auth_type = con->best->type;
2668 }
2669
2670 auth_str[0] = '\0';
2671
2672 if (auth_type == CUPSD_AUTH_BASIC || auth_type == CUPSD_AUTH_BASICDIGEST)
2673 strlcpy(auth_str, "Basic realm=\"CUPS\"", sizeof(auth_str));
2674 else if (auth_type == CUPSD_AUTH_DIGEST)
2675 snprintf(auth_str, sizeof(auth_str), "Digest realm=\"CUPS\", nonce=\"%s\"",
2676 con->http.hostname);
2677 #ifdef HAVE_GSSAPI
2678 else if (auth_type == CUPSD_AUTH_NEGOTIATE)
2679 {
2680 # ifdef AF_LOCAL
2681 if (_httpAddrFamily(con->http.hostaddr) == AF_LOCAL)
2682 strlcpy(auth_str, "Basic realm=\"CUPS\"", sizeof(auth_str));
2683 else
2684 # endif /* AF_LOCAL */
2685 strlcpy(auth_str, "Negotiate", sizeof(auth_str));
2686 }
2687 #endif /* HAVE_GSSAPI */
2688
2689 if (con->best && auth_type != CUPSD_AUTH_NEGOTIATE &&
2690 !_cups_strcasecmp(con->http.hostname, "localhost"))
2691 {
2692 /*
2693 * Add a "trc" (try root certification) parameter for local non-Kerberos
2694 * requests when the request requires system group membership - then the
2695 * client knows the root certificate can/should be used.
2696 *
2697 * Also, for OS X we also look for @AUTHKEY and add an "authkey"
2698 * parameter as needed...
2699 */
2700
2701 char *name, /* Current user name */
2702 *auth_key; /* Auth key buffer */
2703 size_t auth_size; /* Size of remaining buffer */
2704
2705 auth_key = auth_str + strlen(auth_str);
2706 auth_size = sizeof(auth_str) - (auth_key - auth_str);
2707
2708 for (name = (char *)cupsArrayFirst(con->best->names);
2709 name;
2710 name = (char *)cupsArrayNext(con->best->names))
2711 {
2712 #ifdef HAVE_AUTHORIZATION_H
2713 if (!_cups_strncasecmp(name, "@AUTHKEY(", 9))
2714 {
2715 snprintf(auth_key, auth_size, ", authkey=\"%s\"", name + 9);
2716 /* end parenthesis is stripped in conf.c */
2717 break;
2718 }
2719 else
2720 #endif /* HAVE_AUTHORIZATION_H */
2721 if (!_cups_strcasecmp(name, "@SYSTEM"))
2722 {
2723 #ifdef HAVE_AUTHORIZATION_H
2724 if (SystemGroupAuthKey)
2725 snprintf(auth_key, auth_size,
2726 ", authkey=\"%s\"",
2727 SystemGroupAuthKey);
2728 else
2729 #else
2730 strlcpy(auth_key, ", trc=\"y\"", auth_size);
2731 #endif /* HAVE_AUTHORIZATION_H */
2732 break;
2733 }
2734 }
2735 }
2736
2737 if (auth_str[0])
2738 {
2739 cupsdLogMessage(CUPSD_LOG_DEBUG,
2740 "[Client %d] WWW-Authenticate: %s", con->http.fd,
2741 auth_str);
2742
2743 if (httpPrintf(HTTP(con), "WWW-Authenticate: %s\r\n", auth_str) < 0)
2744 return (0);
2745 }
2746 }
2747
2748 if (con->language && strcmp(con->language->language, "C"))
2749 {
2750 if (httpPrintf(HTTP(con), "Content-Language: %s\r\n",
2751 con->language->language) < 0)
2752 return (0);
2753 }
2754
2755 if (type)
2756 {
2757 if (!strcmp(type, "text/html"))
2758 {
2759 if (httpPrintf(HTTP(con),
2760 "Content-Type: text/html; charset=utf-8\r\n") < 0)
2761 return (0);
2762 }
2763 else if (httpPrintf(HTTP(con), "Content-Type: %s\r\n", type) < 0)
2764 return (0);
2765 }
2766
2767 return (1);
2768 }
2769
2770
2771 /*
2772 * 'cupsdUpdateCGI()' - Read status messages from CGI scripts and programs.
2773 */
2774
2775 void
2776 cupsdUpdateCGI(void)
2777 {
2778 char *ptr, /* Pointer to end of line in buffer */
2779 message[1024]; /* Pointer to message text */
2780 int loglevel; /* Log level for message */
2781
2782
2783 while ((ptr = cupsdStatBufUpdate(CGIStatusBuffer, &loglevel,
2784 message, sizeof(message))) != NULL)
2785 {
2786 if (loglevel == CUPSD_LOG_INFO)
2787 cupsdLogMessage(CUPSD_LOG_INFO, "%s", message);
2788
2789 if (!strchr(CGIStatusBuffer->buffer, '\n'))
2790 break;
2791 }
2792
2793 if (ptr == NULL && !CGIStatusBuffer->bufused)
2794 {
2795 /*
2796 * Fatal error on pipe - should never happen!
2797 */
2798
2799 cupsdLogMessage(CUPSD_LOG_CRIT,
2800 "cupsdUpdateCGI: error reading from CGI error pipe - %s",
2801 strerror(errno));
2802 }
2803 }
2804
2805
2806 /*
2807 * 'cupsdWriteClient()' - Write data to a client as needed.
2808 */
2809
2810 void
2811 cupsdWriteClient(cupsd_client_t *con) /* I - Client connection */
2812 {
2813 int bytes, /* Number of bytes written */
2814 field_col; /* Current column */
2815 char *bufptr, /* Pointer into buffer */
2816 *bufend; /* Pointer to end of buffer */
2817 ipp_state_t ipp_state; /* IPP state value */
2818
2819
2820 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2821 "[Client %d] cupsdWriteClient "
2822 "error=%d, "
2823 "used=%d, "
2824 "state=%s, "
2825 "data_encoding=HTTP_ENCODING_%s, "
2826 "data_remaining=" CUPS_LLFMT ", "
2827 "response=%p(%s), "
2828 "pipe_pid=%d, "
2829 "file=%d",
2830 con->http.fd, con->http.error, con->http.used,
2831 http_states[con->http.state + 1],
2832 con->http.data_encoding == HTTP_ENCODING_CHUNKED ?
2833 "CHUNKED" : "LENGTH",
2834 CUPS_LLCAST con->http.data_remaining,
2835 con->response,
2836 con->response ? ipp_states[con->response->state] : "",
2837 con->pipe_pid, con->file);
2838
2839 if (con->http.state != HTTP_STATE_GET_SEND &&
2840 con->http.state != HTTP_STATE_POST_SEND)
2841 {
2842 /*
2843 * If we get called in the wrong state, then something went wrong with the
2844 * connection and we need to shut it down...
2845 */
2846
2847 cupsdLogMessage(CUPSD_LOG_DEBUG,
2848 "[Client %d] Closing on unexpected HTTP state %s.",
2849 con->http.fd, http_states[con->http.state + 1]);
2850 cupsdCloseClient(con);
2851 return;
2852 }
2853
2854 if (con->pipe_pid)
2855 {
2856 /*
2857 * Make sure we select on the CGI output...
2858 */
2859
2860 cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con);
2861
2862 if (!con->file_ready)
2863 {
2864 /*
2865 * Try again later when there is CGI output available...
2866 */
2867
2868 cupsdRemoveSelect(con->http.fd);
2869 return;
2870 }
2871
2872 con->file_ready = 0;
2873 }
2874
2875 if (con->response && con->response->state != IPP_DATA)
2876 {
2877 ipp_state = ippWrite(HTTP(con), con->response);
2878 bytes = ipp_state != IPP_ERROR &&
2879 (con->file >= 0 || ipp_state != IPP_DATA);
2880 }
2881 else if ((bytes = read(con->file, con->header + con->header_used,
2882 sizeof(con->header) - con->header_used)) > 0)
2883 {
2884 con->header_used += bytes;
2885
2886 if (con->pipe_pid && !con->got_fields)
2887 {
2888 /*
2889 * Inspect the data for Content-Type and other fields.
2890 */
2891
2892 for (bufptr = con->header, bufend = con->header + con->header_used,
2893 field_col = 0;
2894 !con->got_fields && bufptr < bufend;
2895 bufptr ++)
2896 {
2897 if (*bufptr == '\n')
2898 {
2899 /*
2900 * Send line to client...
2901 */
2902
2903 if (bufptr > con->header && bufptr[-1] == '\r')
2904 bufptr[-1] = '\0';
2905 *bufptr++ = '\0';
2906
2907 cupsdLogMessage(CUPSD_LOG_DEBUG, "Script header: %s", con->header);
2908
2909 if (!con->sent_header)
2910 {
2911 /*
2912 * Handle redirection and CGI status codes...
2913 */
2914
2915 if (!_cups_strncasecmp(con->header, "Location:", 9))
2916 {
2917 if (!cupsdSendHeader(con, HTTP_SEE_OTHER, NULL, CUPSD_AUTH_NONE))
2918 {
2919 cupsdCloseClient(con);
2920 return;
2921 }
2922
2923 con->sent_header = 2;
2924
2925 if (httpPrintf(HTTP(con), "Content-Length: 0\r\n") < 0)
2926 return;
2927 }
2928 else if (!_cups_strncasecmp(con->header, "Status:", 7))
2929 {
2930 cupsdSendError(con, (http_status_t)atoi(con->header + 7),
2931 CUPSD_AUTH_NONE);
2932 con->sent_header = 2;
2933 }
2934 else
2935 {
2936 if (!cupsdSendHeader(con, HTTP_OK, NULL, CUPSD_AUTH_NONE))
2937 {
2938 cupsdCloseClient(con);
2939 return;
2940 }
2941
2942 con->sent_header = 1;
2943
2944 if (con->http.version == HTTP_1_1)
2945 {
2946 if (httpPrintf(HTTP(con), "Transfer-Encoding: chunked\r\n") < 0)
2947 return;
2948 }
2949 }
2950 }
2951
2952 if (_cups_strncasecmp(con->header, "Status:", 7))
2953 httpPrintf(HTTP(con), "%s\r\n", con->header);
2954
2955 /*
2956 * Update buffer...
2957 */
2958
2959 con->header_used -= bufptr - con->header;
2960
2961 if (con->header_used > 0)
2962 memmove(con->header, bufptr, con->header_used);
2963
2964 bufptr = con->header - 1;
2965
2966 /*
2967 * See if the line was empty...
2968 */
2969
2970 if (field_col == 0)
2971 {
2972 con->got_fields = 1;
2973
2974 if (cupsdFlushHeader(con) < 0)
2975 {
2976 cupsdCloseClient(con);
2977 return;
2978 }
2979
2980 if (con->http.version == HTTP_1_1)
2981 con->http.data_encoding = HTTP_ENCODING_CHUNKED;
2982 }
2983 else
2984 field_col = 0;
2985 }
2986 else if (*bufptr != '\r')
2987 field_col ++;
2988 }
2989
2990 if (!con->got_fields)
2991 {
2992 con->http.activity = time(NULL);
2993 return;
2994 }
2995 }
2996
2997 if (con->header_used > 0)
2998 {
2999 if (httpWrite2(HTTP(con), con->header, con->header_used) < 0)
3000 {
3001 cupsdLogMessage(CUPSD_LOG_DEBUG,
3002 "[Client %d] Closing for error %d (%s)",
3003 con->http.fd, con->http.error,
3004 strerror(con->http.error));
3005 cupsdCloseClient(con);
3006 return;
3007 }
3008
3009 if (con->http.data_encoding == HTTP_ENCODING_CHUNKED)
3010 httpFlushWrite(HTTP(con));
3011
3012 con->bytes += con->header_used;
3013
3014 if (con->http.state == HTTP_STATE_WAITING)
3015 bytes = 0;
3016 else
3017 bytes = con->header_used;
3018
3019 con->header_used = 0;
3020 }
3021 }
3022
3023 if (bytes <= 0 ||
3024 (con->http.state != HTTP_STATE_GET_SEND && con->http.state != HTTP_STATE_POST_SEND))
3025 {
3026 if (!con->sent_header && con->pipe_pid)
3027 cupsdSendError(con, HTTP_SERVER_ERROR, CUPSD_AUTH_NONE);
3028 else
3029 {
3030 cupsdLogRequest(con, HTTP_OK);
3031
3032 httpFlushWrite(HTTP(con));
3033
3034 if (con->http.data_encoding == HTTP_ENCODING_CHUNKED && con->sent_header == 1)
3035 {
3036 if (httpWrite2(HTTP(con), "", 0) < 0)
3037 {
3038 cupsdLogMessage(CUPSD_LOG_DEBUG,
3039 "[Client %d] Closing for error %d (%s)",
3040 con->http.fd, con->http.error,
3041 strerror(con->http.error));
3042 cupsdCloseClient(con);
3043 return;
3044 }
3045 }
3046 }
3047
3048 con->http.state = HTTP_STATE_WAITING;
3049
3050 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
3051
3052 if (con->file >= 0)
3053 {
3054 cupsdRemoveSelect(con->file);
3055
3056 if (con->pipe_pid)
3057 cupsdEndProcess(con->pipe_pid, 0);
3058
3059 close(con->file);
3060 con->file = -1;
3061 con->pipe_pid = 0;
3062 }
3063
3064 if (con->filename)
3065 {
3066 unlink(con->filename);
3067 cupsdClearString(&con->filename);
3068 }
3069
3070 if (con->request)
3071 {
3072 ippDelete(con->request);
3073 con->request = NULL;
3074 }
3075
3076 if (con->response)
3077 {
3078 ippDelete(con->response);
3079 con->response = NULL;
3080 }
3081
3082 cupsdClearString(&con->command);
3083 cupsdClearString(&con->options);
3084 cupsdClearString(&con->query_string);
3085
3086 if (!con->http.keep_alive)
3087 {
3088 cupsdLogMessage(CUPSD_LOG_DEBUG,
3089 "[Client %d] Closing because Keep-Alive disabled.",
3090 con->http.fd);
3091 cupsdCloseClient(con);
3092 return;
3093 }
3094 else
3095 {
3096 cupsArrayRemove(ActiveClients, con);
3097 cupsdSetBusyState();
3098 }
3099 }
3100
3101 con->http.activity = time(NULL);
3102 }
3103
3104
3105 /*
3106 * 'check_if_modified()' - Decode an "If-Modified-Since" line.
3107 */
3108
3109 static int /* O - 1 if modified since */
3110 check_if_modified(
3111 cupsd_client_t *con, /* I - Client connection */
3112 struct stat *filestats) /* I - File information */
3113 {
3114 char *ptr; /* Pointer into field */
3115 time_t date; /* Time/date value */
3116 off_t size; /* Size/length value */
3117
3118
3119 size = 0;
3120 date = 0;
3121 ptr = con->http.fields[HTTP_FIELD_IF_MODIFIED_SINCE];
3122
3123 if (*ptr == '\0')
3124 return (1);
3125
3126 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3127 "[Client %d] check_if_modified "
3128 "filestats=%p(" CUPS_LLFMT ", %d)) If-Modified-Since=\"%s\"",
3129 con->http.fd, filestats, CUPS_LLCAST filestats->st_size,
3130 (int)filestats->st_mtime, ptr);
3131
3132 while (*ptr != '\0')
3133 {
3134 while (isspace(*ptr) || *ptr == ';')
3135 ptr ++;
3136
3137 if (_cups_strncasecmp(ptr, "length=", 7) == 0)
3138 {
3139 ptr += 7;
3140 size = strtoll(ptr, NULL, 10);
3141
3142 while (isdigit(*ptr))
3143 ptr ++;
3144 }
3145 else if (isalpha(*ptr))
3146 {
3147 date = httpGetDateTime(ptr);
3148 while (*ptr != '\0' && *ptr != ';')
3149 ptr ++;
3150 }
3151 else
3152 ptr ++;
3153 }
3154
3155 return ((size != filestats->st_size && size != 0) ||
3156 (date < filestats->st_mtime && date != 0) ||
3157 (size == 0 && date == 0));
3158 }
3159
3160
3161 /*
3162 * 'compare_clients()' - Compare two client connections.
3163 */
3164
3165 static int /* O - Result of comparison */
3166 compare_clients(cupsd_client_t *a, /* I - First client */
3167 cupsd_client_t *b, /* I - Second client */
3168 void *data) /* I - User data (not used) */
3169 {
3170 (void)data;
3171
3172 if (a == b)
3173 return (0);
3174 else if (a < b)
3175 return (-1);
3176 else
3177 return (1);
3178 }
3179
3180
3181 /*
3182 * 'data_ready()' - Check whether data is available from a client.
3183 */
3184
3185 static int /* O - 1 if data is ready, 0 otherwise */
3186 data_ready(cupsd_client_t *con) /* I - Client */
3187 {
3188 if (con->http.used > 0)
3189 return (1);
3190 #ifdef HAVE_SSL
3191 else if (con->http.tls)
3192 {
3193 # ifdef HAVE_LIBSSL
3194 if (SSL_pending((SSL *)(con->http.tls)))
3195 return (1);
3196 # elif defined(HAVE_GNUTLS)
3197 if (gnutls_record_check_pending(con->http.tls))
3198 return (1);
3199 # elif defined(HAVE_CDSASSL)
3200 size_t bytes; /* Bytes that are available */
3201
3202 if (!SSLGetBufferedReadSize(con->http.tls, &bytes) && bytes > 0)
3203 return (1);
3204 # endif /* HAVE_LIBSSL */
3205 }
3206 #endif /* HAVE_SSL */
3207
3208 return (0);
3209 }
3210
3211
3212 /*
3213 * 'get_file()' - Get a filename and state info.
3214 */
3215
3216 static char * /* O - Real filename */
3217 get_file(cupsd_client_t *con, /* I - Client connection */
3218 struct stat *filestats, /* O - File information */
3219 char *filename, /* IO - Filename buffer */
3220 int len) /* I - Buffer length */
3221 {
3222 int status; /* Status of filesystem calls */
3223 char *ptr; /* Pointer info filename */
3224 int plen; /* Remaining length after pointer */
3225 char language[7]; /* Language subdirectory, if any */
3226
3227
3228 /*
3229 * Figure out the real filename...
3230 */
3231
3232 language[0] = '\0';
3233
3234 if (!strncmp(con->uri, "/ppd/", 5) && !strchr(con->uri + 5, '/'))
3235 snprintf(filename, len, "%s%s", ServerRoot, con->uri);
3236 else if (!strncmp(con->uri, "/icons/", 7) && !strchr(con->uri + 7, '/'))
3237 {
3238 snprintf(filename, len, "%s/%s", CacheDir, con->uri + 7);
3239 if (access(filename, F_OK) < 0)
3240 snprintf(filename, len, "%s/images/generic.png", DocumentRoot);
3241 }
3242 else if (!strncmp(con->uri, "/rss/", 5) && !strchr(con->uri + 5, '/'))
3243 snprintf(filename, len, "%s/rss/%s", CacheDir, con->uri + 5);
3244 else if (!strncmp(con->uri, "/admin/conf/", 12))
3245 snprintf(filename, len, "%s%s", ServerRoot, con->uri + 11);
3246 else if (!strncmp(con->uri, "/admin/log/", 11))
3247 {
3248 if (!strncmp(con->uri + 11, "access_log", 10) && AccessLog[0] == '/')
3249 strlcpy(filename, AccessLog, len);
3250 else if (!strncmp(con->uri + 11, "error_log", 9) && ErrorLog[0] == '/')
3251 strlcpy(filename, ErrorLog, len);
3252 else if (!strncmp(con->uri + 11, "page_log", 8) && PageLog[0] == '/')
3253 strlcpy(filename, PageLog, len);
3254 else
3255 return (NULL);
3256 }
3257 else if (con->language)
3258 {
3259 snprintf(language, sizeof(language), "/%s", con->language->language);
3260 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3261 }
3262 else
3263 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3264
3265 if ((ptr = strchr(filename, '?')) != NULL)
3266 *ptr = '\0';
3267
3268 /*
3269 * Grab the status for this language; if there isn't a language-specific file
3270 * then fallback to the default one...
3271 */
3272
3273 if ((status = stat(filename, filestats)) != 0 && language[0] &&
3274 strncmp(con->uri, "/icons/", 7) &&
3275 strncmp(con->uri, "/ppd/", 5) &&
3276 strncmp(con->uri, "/rss/", 5) &&
3277 strncmp(con->uri, "/admin/conf/", 12) &&
3278 strncmp(con->uri, "/admin/log/", 11))
3279 {
3280 /*
3281 * Drop the country code...
3282 */
3283
3284 language[3] = '\0';
3285 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3286
3287 if ((ptr = strchr(filename, '?')) != NULL)
3288 *ptr = '\0';
3289
3290 if ((status = stat(filename, filestats)) != 0)
3291 {
3292 /*
3293 * Drop the language prefix and try the root directory...
3294 */
3295
3296 language[0] = '\0';
3297 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3298
3299 if ((ptr = strchr(filename, '?')) != NULL)
3300 *ptr = '\0';
3301
3302 status = stat(filename, filestats);
3303 }
3304 }
3305
3306 /*
3307 * If we're found a directory, get the index.html file instead...
3308 */
3309
3310 if (!status && S_ISDIR(filestats->st_mode))
3311 {
3312 /*
3313 * Make sure the URI ends with a slash...
3314 */
3315
3316 if (con->uri[strlen(con->uri) - 1] != '/')
3317 strlcat(con->uri, "/", sizeof(con->uri));
3318
3319 /*
3320 * Find the directory index file, trying every language...
3321 */
3322
3323 do
3324 {
3325 if (status && language[0])
3326 {
3327 /*
3328 * Try a different language subset...
3329 */
3330
3331 if (language[3])
3332 language[0] = '\0'; /* Strip country code */
3333 else
3334 language[0] = '\0'; /* Strip language */
3335 }
3336
3337 /*
3338 * Look for the index file...
3339 */
3340
3341 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3342
3343 if ((ptr = strchr(filename, '?')) != NULL)
3344 *ptr = '\0';
3345
3346 ptr = filename + strlen(filename);
3347 plen = len - (ptr - filename);
3348
3349 strlcpy(ptr, "index.html", plen);
3350 status = stat(filename, filestats);
3351
3352 #ifdef HAVE_JAVA
3353 if (status)
3354 {
3355 strlcpy(ptr, "index.class", plen);
3356 status = stat(filename, filestats);
3357 }
3358 #endif /* HAVE_JAVA */
3359
3360 #ifdef HAVE_PERL
3361 if (status)
3362 {
3363 strlcpy(ptr, "index.pl", plen);
3364 status = stat(filename, filestats);
3365 }
3366 #endif /* HAVE_PERL */
3367
3368 #ifdef HAVE_PHP
3369 if (status)
3370 {
3371 strlcpy(ptr, "index.php", plen);
3372 status = stat(filename, filestats);
3373 }
3374 #endif /* HAVE_PHP */
3375
3376 #ifdef HAVE_PYTHON
3377 if (status)
3378 {
3379 strlcpy(ptr, "index.pyc", plen);
3380 status = stat(filename, filestats);
3381 }
3382
3383 if (status)
3384 {
3385 strlcpy(ptr, "index.py", plen);
3386 status = stat(filename, filestats);
3387 }
3388 #endif /* HAVE_PYTHON */
3389
3390 }
3391 while (status && language[0]);
3392 }
3393
3394 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3395 "[Client %d] get_file filestats=%p, filename=%p, len=%d, "
3396 "returning \"%s\".", con->http.fd, filestats, filename, len,
3397 status ? "(null)" : filename);
3398
3399 if (status)
3400 return (NULL);
3401 else
3402 return (filename);
3403 }
3404
3405
3406 /*
3407 * 'install_cupsd_conf()' - Install a configuration file.
3408 */
3409
3410 static http_status_t /* O - Status */
3411 install_cupsd_conf(cupsd_client_t *con) /* I - Connection */
3412 {
3413 char filename[1024]; /* Configuration filename */
3414 cups_file_t *in, /* Input file */
3415 *out; /* Output file */
3416 char buffer[16384]; /* Copy buffer */
3417 ssize_t bytes; /* Number of bytes */
3418
3419
3420 /*
3421 * Open the request file...
3422 */
3423
3424 if ((in = cupsFileOpen(con->filename, "rb")) == NULL)
3425 {
3426 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open request file \"%s\": %s",
3427 con->filename, strerror(errno));
3428 return (HTTP_SERVER_ERROR);
3429 }
3430
3431 /*
3432 * Open the new config file...
3433 */
3434
3435 if ((out = cupsdCreateConfFile(ConfigurationFile, ConfigFilePerm)) == NULL)
3436 {
3437 cupsFileClose(in);
3438 return (HTTP_SERVER_ERROR);
3439 }
3440
3441 cupsdLogMessage(CUPSD_LOG_INFO, "Installing config file \"%s\"...",
3442 ConfigurationFile);
3443
3444 /*
3445 * Copy from the request to the new config file...
3446 */
3447
3448 while ((bytes = cupsFileRead(in, buffer, sizeof(buffer))) > 0)
3449 if (cupsFileWrite(out, buffer, bytes) < bytes)
3450 {
3451 cupsdLogMessage(CUPSD_LOG_ERROR,
3452 "Unable to copy to config file \"%s\": %s",
3453 ConfigurationFile, strerror(errno));
3454
3455 cupsFileClose(in);
3456 cupsFileClose(out);
3457
3458 snprintf(filename, sizeof(filename), "%s.N", ConfigurationFile);
3459 cupsdUnlinkOrRemoveFile(filename);
3460
3461 return (HTTP_SERVER_ERROR);
3462 }
3463
3464 /*
3465 * Close the files...
3466 */
3467
3468 cupsFileClose(in);
3469
3470 if (cupsdCloseCreatedConfFile(out, ConfigurationFile))
3471 return (HTTP_SERVER_ERROR);
3472
3473 /*
3474 * Remove the request file...
3475 */
3476
3477 cupsdUnlinkOrRemoveFile(con->filename);
3478 cupsdClearString(&con->filename);
3479
3480 /*
3481 * Set the NeedReload flag...
3482 */
3483
3484 NeedReload = RELOAD_CUPSD;
3485 ReloadTime = time(NULL);
3486
3487 /*
3488 * Return that the file was created successfully...
3489 */
3490
3491 return (HTTP_CREATED);
3492 }
3493
3494
3495 /*
3496 * 'is_cgi()' - Is the resource a CGI script/program?
3497 */
3498
3499 static int /* O - 1 = CGI, 0 = file */
3500 is_cgi(cupsd_client_t *con, /* I - Client connection */
3501 const char *filename, /* I - Real filename */
3502 struct stat *filestats, /* I - File information */
3503 mime_type_t *type) /* I - MIME type */
3504 {
3505 const char *options; /* Options on URL */
3506
3507
3508 /*
3509 * Get the options, if any...
3510 */
3511
3512 if ((options = strchr(con->uri, '?')) != NULL)
3513 {
3514 options ++;
3515 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", options);
3516 }
3517
3518 /*
3519 * Check for known types...
3520 */
3521
3522 if (!type || _cups_strcasecmp(type->super, "application"))
3523 {
3524 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3525 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3526 "type=%s/%s, returning 0", con->http.fd, filename,
3527 filestats, type ? type->super : "unknown",
3528 type ? type->type : "unknown");
3529 return (0);
3530 }
3531
3532 if (!_cups_strcasecmp(type->type, "x-httpd-cgi") &&
3533 (filestats->st_mode & 0111))
3534 {
3535 /*
3536 * "application/x-httpd-cgi" is a CGI script.
3537 */
3538
3539 cupsdSetString(&con->command, filename);
3540
3541 if (options)
3542 cupsdSetStringf(&con->options, " %s", options);
3543
3544 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3545 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3546 "type=%s/%s, returning 1", con->http.fd, filename,
3547 filestats, type->super, type->type);
3548 return (1);
3549 }
3550 #ifdef HAVE_JAVA
3551 else if (!_cups_strcasecmp(type->type, "x-httpd-java"))
3552 {
3553 /*
3554 * "application/x-httpd-java" is a Java servlet.
3555 */
3556
3557 cupsdSetString(&con->command, CUPS_JAVA);
3558
3559 if (options)
3560 cupsdSetStringf(&con->options, " %s %s", filename, options);
3561 else
3562 cupsdSetStringf(&con->options, " %s", filename);
3563
3564 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3565 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3566 "type=%s/%s, returning 1", con->http.fd, filename,
3567 filestats, type->super, type->type);
3568 return (1);
3569 }
3570 #endif /* HAVE_JAVA */
3571 #ifdef HAVE_PERL
3572 else if (!_cups_strcasecmp(type->type, "x-httpd-perl"))
3573 {
3574 /*
3575 * "application/x-httpd-perl" is a Perl page.
3576 */
3577
3578 cupsdSetString(&con->command, CUPS_PERL);
3579
3580 if (options)
3581 cupsdSetStringf(&con->options, " %s %s", filename, options);
3582 else
3583 cupsdSetStringf(&con->options, " %s", filename);
3584
3585 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3586 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3587 "type=%s/%s, returning 1", con->http.fd, filename,
3588 filestats, type->super, type->type);
3589 return (1);
3590 }
3591 #endif /* HAVE_PERL */
3592 #ifdef HAVE_PHP
3593 else if (!_cups_strcasecmp(type->type, "x-httpd-php"))
3594 {
3595 /*
3596 * "application/x-httpd-php" is a PHP page.
3597 */
3598
3599 cupsdSetString(&con->command, CUPS_PHP);
3600
3601 if (options)
3602 cupsdSetStringf(&con->options, " %s %s", filename, options);
3603 else
3604 cupsdSetStringf(&con->options, " %s", filename);
3605
3606 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3607 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3608 "type=%s/%s, returning 1", con->http.fd, filename,
3609 filestats, type->super, type->type);
3610 return (1);
3611 }
3612 #endif /* HAVE_PHP */
3613 #ifdef HAVE_PYTHON
3614 else if (!_cups_strcasecmp(type->type, "x-httpd-python"))
3615 {
3616 /*
3617 * "application/x-httpd-python" is a Python page.
3618 */
3619
3620 cupsdSetString(&con->command, CUPS_PYTHON);
3621
3622 if (options)
3623 cupsdSetStringf(&con->options, " %s %s", filename, options);
3624 else
3625 cupsdSetStringf(&con->options, " %s", filename);
3626
3627 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3628 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3629 "type=%s/%s, returning 1", con->http.fd, filename,
3630 filestats, type->super, type->type);
3631 return (1);
3632 }
3633 #endif /* HAVE_PYTHON */
3634
3635 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3636 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3637 "type=%s/%s, returning 0", con->http.fd, filename,
3638 filestats, type->super, type->type);
3639 return (0);
3640 }
3641
3642
3643 /*
3644 * 'is_path_absolute()' - Is a path absolute and free of relative elements (i.e. "..").
3645 */
3646
3647 static int /* O - 0 if relative, 1 if absolute */
3648 is_path_absolute(const char *path) /* I - Input path */
3649 {
3650 /*
3651 * Check for a leading slash...
3652 */
3653
3654 if (path[0] != '/')
3655 return (0);
3656
3657 /*
3658 * Check for "/.." in the path...
3659 */
3660
3661 while ((path = strstr(path, "/..")) != NULL)
3662 {
3663 if (!path[3] || path[3] == '/')
3664 return (0);
3665
3666 path ++;
3667 }
3668
3669 /*
3670 * If we haven't found any relative paths, return 1 indicating an
3671 * absolute path...
3672 */
3673
3674 return (1);
3675 }
3676
3677
3678 /*
3679 * 'pipe_command()' - Pipe the output of a command to the remote client.
3680 */
3681
3682 static int /* O - Process ID */
3683 pipe_command(cupsd_client_t *con, /* I - Client connection */
3684 int infile, /* I - Standard input for command */
3685 int *outfile, /* O - Standard output for command */
3686 char *command, /* I - Command to run */
3687 char *options, /* I - Options for command */
3688 int root) /* I - Run as root? */
3689 {
3690 int i; /* Looping var */
3691 int pid; /* Process ID */
3692 char *commptr, /* Command string pointer */
3693 commch; /* Command string character */
3694 char *uriptr; /* URI string pointer */
3695 int fds[2]; /* Pipe FDs */
3696 int argc; /* Number of arguments */
3697 int envc; /* Number of environment variables */
3698 char argbuf[10240], /* Argument buffer */
3699 *argv[100], /* Argument strings */
3700 *envp[MAX_ENV + 20]; /* Environment variables */
3701 char auth_type[256], /* AUTH_TYPE environment variable */
3702 content_length[1024], /* CONTENT_LENGTH environment variable */
3703 content_type[1024], /* CONTENT_TYPE environment variable */
3704 http_cookie[32768], /* HTTP_COOKIE environment variable */
3705 http_referer[1024], /* HTTP_REFERER environment variable */
3706 http_user_agent[1024], /* HTTP_USER_AGENT environment variable */
3707 lang[1024], /* LANG environment variable */
3708 path_info[1024], /* PATH_INFO environment variable */
3709 remote_addr[1024], /* REMOTE_ADDR environment variable */
3710 remote_host[1024], /* REMOTE_HOST environment variable */
3711 remote_user[1024], /* REMOTE_USER environment variable */
3712 script_filename[1024], /* SCRIPT_FILENAME environment variable */
3713 script_name[1024], /* SCRIPT_NAME environment variable */
3714 server_name[1024], /* SERVER_NAME environment variable */
3715 server_port[1024]; /* SERVER_PORT environment variable */
3716 ipp_attribute_t *attr; /* attributes-natural-language attribute */
3717
3718
3719 /*
3720 * Parse a copy of the options string, which is of the form:
3721 *
3722 * argument+argument+argument
3723 * ?argument+argument+argument
3724 * param=value&param=value
3725 * ?param=value&param=value
3726 * /name?argument+argument+argument
3727 * /name?param=value&param=value
3728 *
3729 * If the string contains an "=" character after the initial name,
3730 * then we treat it as a HTTP GET form request and make a copy of
3731 * the remaining string for the environment variable.
3732 *
3733 * The string is always parsed out as command-line arguments, to
3734 * be consistent with Apache...
3735 */
3736
3737 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3738 "[Client %d] pipe_command infile=%d, outfile=%p, "
3739 "command=\"%s\", options=\"%s\", root=%d",
3740 con->http.fd, infile, outfile, command,
3741 options ? options : "(null)", root);
3742
3743 argv[0] = command;
3744
3745 if (options)
3746 {
3747 commptr = options;
3748 if (*commptr == ' ')
3749 commptr ++;
3750 strlcpy(argbuf, commptr, sizeof(argbuf));
3751 }
3752 else
3753 argbuf[0] = '\0';
3754
3755 if (argbuf[0] == '/')
3756 {
3757 /*
3758 * Found some trailing path information, set PATH_INFO...
3759 */
3760
3761 if ((commptr = strchr(argbuf, '?')) == NULL)
3762 commptr = argbuf + strlen(argbuf);
3763
3764 commch = *commptr;
3765 *commptr = '\0';
3766 snprintf(path_info, sizeof(path_info), "PATH_INFO=%s", argbuf);
3767 *commptr = commch;
3768 }
3769 else
3770 {
3771 commptr = argbuf;
3772 path_info[0] = '\0';
3773
3774 if (*commptr == ' ')
3775 commptr ++;
3776 }
3777
3778 if (*commptr == '?' && con->operation == HTTP_STATE_GET && !con->query_string)
3779 {
3780 commptr ++;
3781 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", commptr);
3782 }
3783
3784 argc = 1;
3785
3786 if (*commptr)
3787 {
3788 argv[argc ++] = commptr;
3789
3790 for (; *commptr && argc < 99; commptr ++)
3791 {
3792 /*
3793 * Break arguments whenever we see a + or space...
3794 */
3795
3796 if (*commptr == ' ' || *commptr == '+')
3797 {
3798 while (*commptr == ' ' || *commptr == '+')
3799 *commptr++ = '\0';
3800
3801 /*
3802 * If we don't have a blank string, save it as another argument...
3803 */
3804
3805 if (*commptr)
3806 {
3807 argv[argc] = commptr;
3808 argc ++;
3809 }
3810 else
3811 break;
3812 }
3813 else if (*commptr == '%' && isxdigit(commptr[1] & 255) &&
3814 isxdigit(commptr[2] & 255))
3815 {
3816 /*
3817 * Convert the %xx notation to the individual character.
3818 */
3819
3820 if (commptr[1] >= '0' && commptr[1] <= '9')
3821 *commptr = (commptr[1] - '0') << 4;
3822 else
3823 *commptr = (tolower(commptr[1]) - 'a' + 10) << 4;
3824
3825 if (commptr[2] >= '0' && commptr[2] <= '9')
3826 *commptr |= commptr[2] - '0';
3827 else
3828 *commptr |= tolower(commptr[2]) - 'a' + 10;
3829
3830 _cups_strcpy(commptr + 1, commptr + 3);
3831
3832 /*
3833 * Check for a %00 and break if that is the case...
3834 */
3835
3836 if (!*commptr)
3837 break;
3838 }
3839 }
3840 }
3841
3842 argv[argc] = NULL;
3843
3844 /*
3845 * Setup the environment variables as needed...
3846 */
3847
3848 if (con->username[0])
3849 {
3850 snprintf(auth_type, sizeof(auth_type), "AUTH_TYPE=%s",
3851 httpGetField(HTTP(con), HTTP_FIELD_AUTHORIZATION));
3852
3853 if ((uriptr = strchr(auth_type + 10, ' ')) != NULL)
3854 *uriptr = '\0';
3855 }
3856 else
3857 auth_type[0] = '\0';
3858
3859 if (con->request &&
3860 (attr = ippFindAttribute(con->request, "attributes-natural-language",
3861 IPP_TAG_LANGUAGE)) != NULL)
3862 {
3863 switch (strlen(attr->values[0].string.text))
3864 {
3865 default :
3866 /*
3867 * This is an unknown or badly formatted language code; use
3868 * the POSIX locale...
3869 */
3870
3871 strlcpy(lang, "LANG=C", sizeof(lang));
3872 break;
3873
3874 case 2 :
3875 /*
3876 * Just the language code (ll)...
3877 */
3878
3879 snprintf(lang, sizeof(lang), "LANG=%s.UTF8",
3880 attr->values[0].string.text);
3881 break;
3882
3883 case 5 :
3884 /*
3885 * Language and country code (ll-cc)...
3886 */
3887
3888 snprintf(lang, sizeof(lang), "LANG=%c%c_%c%c.UTF8",
3889 attr->values[0].string.text[0],
3890 attr->values[0].string.text[1],
3891 toupper(attr->values[0].string.text[3] & 255),
3892 toupper(attr->values[0].string.text[4] & 255));
3893 break;
3894 }
3895 }
3896 else if (con->language)
3897 snprintf(lang, sizeof(lang), "LANG=%s.UTF8", con->language->language);
3898 else
3899 strlcpy(lang, "LANG=C", sizeof(lang));
3900
3901 strlcpy(remote_addr, "REMOTE_ADDR=", sizeof(remote_addr));
3902 httpAddrString(con->http.hostaddr, remote_addr + 12,
3903 sizeof(remote_addr) - 12);
3904
3905 snprintf(remote_host, sizeof(remote_host), "REMOTE_HOST=%s",
3906 con->http.hostname);
3907
3908 snprintf(script_name, sizeof(script_name), "SCRIPT_NAME=%s", con->uri);
3909 if ((uriptr = strchr(script_name, '?')) != NULL)
3910 *uriptr = '\0';
3911
3912 snprintf(script_filename, sizeof(script_filename), "SCRIPT_FILENAME=%s%s",
3913 DocumentRoot, script_name + 12);
3914
3915 sprintf(server_port, "SERVER_PORT=%d", con->serverport);
3916
3917 if (con->http.fields[HTTP_FIELD_HOST][0])
3918 {
3919 char *nameptr; /* Pointer to ":port" */
3920
3921 snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s",
3922 con->http.fields[HTTP_FIELD_HOST]);
3923 if ((nameptr = strrchr(server_name, ':')) != NULL && !strchr(nameptr, ']'))
3924 *nameptr = '\0'; /* Strip trailing ":port" */
3925 }
3926 else
3927 snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s",
3928 con->servername);
3929
3930 envc = cupsdLoadEnv(envp, (int)(sizeof(envp) / sizeof(envp[0])));
3931
3932 if (auth_type[0])
3933 envp[envc ++] = auth_type;
3934
3935 envp[envc ++] = lang;
3936 envp[envc ++] = "REDIRECT_STATUS=1";
3937 envp[envc ++] = "GATEWAY_INTERFACE=CGI/1.1";
3938 envp[envc ++] = server_name;
3939 envp[envc ++] = server_port;
3940 envp[envc ++] = remote_addr;
3941 envp[envc ++] = remote_host;
3942 envp[envc ++] = script_name;
3943 envp[envc ++] = script_filename;
3944
3945 if (path_info[0])
3946 envp[envc ++] = path_info;
3947
3948 if (con->username[0])
3949 {
3950 snprintf(remote_user, sizeof(remote_user), "REMOTE_USER=%s", con->username);
3951
3952 envp[envc ++] = remote_user;
3953 }
3954
3955 if (con->http.version == HTTP_1_1)
3956 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.1";
3957 else if (con->http.version == HTTP_1_0)
3958 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.0";
3959 else
3960 envp[envc ++] = "SERVER_PROTOCOL=HTTP/0.9";
3961
3962 if (con->http.cookie)
3963 {
3964 snprintf(http_cookie, sizeof(http_cookie), "HTTP_COOKIE=%s",
3965 con->http.cookie);
3966 envp[envc ++] = http_cookie;
3967 }
3968
3969 if (con->http.fields[HTTP_FIELD_USER_AGENT][0])
3970 {
3971 snprintf(http_user_agent, sizeof(http_user_agent), "HTTP_USER_AGENT=%s",
3972 con->http.fields[HTTP_FIELD_USER_AGENT]);
3973 envp[envc ++] = http_user_agent;
3974 }
3975
3976 if (con->http.fields[HTTP_FIELD_REFERER][0])
3977 {
3978 snprintf(http_referer, sizeof(http_referer), "HTTP_REFERER=%s",
3979 con->http.fields[HTTP_FIELD_REFERER]);
3980 envp[envc ++] = http_referer;
3981 }
3982
3983 if (con->operation == HTTP_STATE_GET)
3984 {
3985 envp[envc ++] = "REQUEST_METHOD=GET";
3986
3987 if (con->query_string)
3988 {
3989 /*
3990 * Add GET form variables after ?...
3991 */
3992
3993 envp[envc ++] = con->query_string;
3994 }
3995 else
3996 envp[envc ++] = "QUERY_STRING=";
3997 }
3998 else
3999 {
4000 sprintf(content_length, "CONTENT_LENGTH=" CUPS_LLFMT,
4001 CUPS_LLCAST con->bytes);
4002 snprintf(content_type, sizeof(content_type), "CONTENT_TYPE=%s",
4003 con->http.fields[HTTP_FIELD_CONTENT_TYPE]);
4004
4005 envp[envc ++] = "REQUEST_METHOD=POST";
4006 envp[envc ++] = content_length;
4007 envp[envc ++] = content_type;
4008 }
4009
4010 /*
4011 * Tell the CGI if we are using encryption...
4012 */
4013
4014 if (con->http.tls)
4015 envp[envc ++] = "HTTPS=ON";
4016
4017 /*
4018 * Terminate the environment array...
4019 */
4020
4021 envp[envc] = NULL;
4022
4023 if (LogLevel >= CUPSD_LOG_DEBUG)
4024 {
4025 for (i = 0; i < argc; i ++)
4026 cupsdLogMessage(CUPSD_LOG_DEBUG,
4027 "[CGI] argv[%d] = \"%s\"", i, argv[i]);
4028 for (i = 0; i < envc; i ++)
4029 cupsdLogMessage(CUPSD_LOG_DEBUG,
4030 "[CGI] envp[%d] = \"%s\"", i, envp[i]);
4031 }
4032
4033 /*
4034 * Create a pipe for the output...
4035 */
4036
4037 if (cupsdOpenPipe(fds))
4038 {
4039 cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to create pipe for %s - %s",
4040 argv[0], strerror(errno));
4041 return (0);
4042 }
4043
4044 /*
4045 * Then execute the command...
4046 */
4047
4048 if (cupsdStartProcess(command, argv, envp, infile, fds[1], CGIPipes[1],
4049 -1, -1, root, DefaultProfile, NULL, &pid) < 0)
4050 {
4051 /*
4052 * Error - can't fork!
4053 */
4054
4055 cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to start %s - %s", argv[0],
4056 strerror(errno));
4057
4058 cupsdClosePipe(fds);
4059 pid = 0;
4060 }
4061 else
4062 {
4063 /*
4064 * Fork successful - return the PID...
4065 */
4066
4067 if (con->username[0])
4068 cupsdAddCert(pid, con->username, con->type);
4069
4070 cupsdLogMessage(CUPSD_LOG_DEBUG, "[CGI] Started %s (PID %d)", command, pid);
4071
4072 *outfile = fds[0];
4073 close(fds[1]);
4074 }
4075
4076 return (pid);
4077 }
4078
4079
4080 /*
4081 * 'valid_host()' - Is the Host: field valid?
4082 */
4083
4084 static int /* O - 1 if valid, 0 if not */
4085 valid_host(cupsd_client_t *con) /* I - Client connection */
4086 {
4087 cupsd_alias_t *a; /* Current alias */
4088 cupsd_netif_t *netif; /* Current network interface */
4089 const char *host, /* Host field */
4090 *end; /* End character */
4091
4092
4093 host = con->http.fields[HTTP_FIELD_HOST];
4094
4095 if (httpAddrLocalhost(con->http.hostaddr))
4096 {
4097 /*
4098 * Only allow "localhost" or the equivalent IPv4 or IPv6 numerical
4099 * addresses when accessing CUPS via the loopback interface...
4100 */
4101
4102 return (!_cups_strcasecmp(host, "localhost") ||
4103 !_cups_strncasecmp(host, "localhost:", 10) ||
4104 !_cups_strcasecmp(host, "localhost.") ||
4105 !_cups_strncasecmp(host, "localhost.:", 11) ||
4106 #ifdef __linux
4107 !_cups_strcasecmp(host, "localhost.localdomain") ||
4108 !_cups_strncasecmp(host, "localhost.localdomain:", 22) ||
4109 #endif /* __linux */
4110 !strcmp(host, "127.0.0.1") ||
4111 !strncmp(host, "127.0.0.1:", 10) ||
4112 !strcmp(host, "[::1]") ||
4113 !strncmp(host, "[::1]:", 6));
4114 }
4115
4116 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
4117 /*
4118 * Check if the hostname is something.local (Bonjour); if so, allow it.
4119 */
4120
4121 if ((end = strrchr(host, '.')) != NULL && end > host &&
4122 (!end[1] || end[1] == ':'))
4123 {
4124 /*
4125 * "." on end, work back to second-to-last "."...
4126 */
4127 for (end --; end > host && *end != '.'; end --);
4128 }
4129
4130 if (end && (!_cups_strcasecmp(end, ".local") ||
4131 !_cups_strncasecmp(end, ".local:", 7) ||
4132 !_cups_strcasecmp(end, ".local.") ||
4133 !_cups_strncasecmp(end, ".local.:", 8)))
4134 return (1);
4135 #endif /* HAVE_DNSSD || HAVE_AVAHI */
4136
4137 /*
4138 * Check if the hostname is an IP address...
4139 */
4140
4141 if (isdigit(*host & 255) || *host == '[')
4142 {
4143 /*
4144 * Possible IPv4/IPv6 address...
4145 */
4146
4147 char temp[1024], /* Temporary string */
4148 *ptr; /* Pointer into temporary string */
4149 http_addrlist_t *addrlist; /* List of addresses */
4150
4151
4152 strlcpy(temp, host, sizeof(temp));
4153 if ((ptr = strrchr(temp, ':')) != NULL && !strchr(ptr, ']'))
4154 *ptr = '\0'; /* Strip :port from host value */
4155
4156 if ((addrlist = httpAddrGetList(temp, AF_UNSPEC, NULL)) != NULL)
4157 {
4158 /*
4159 * Good IPv4/IPv6 address...
4160 */
4161
4162 httpAddrFreeList(addrlist);
4163 return (1);
4164 }
4165 }
4166
4167 /*
4168 * Check for (alias) name matches...
4169 */
4170
4171 for (a = (cupsd_alias_t *)cupsArrayFirst(ServerAlias);
4172 a;
4173 a = (cupsd_alias_t *)cupsArrayNext(ServerAlias))
4174 {
4175 /*
4176 * "ServerAlias *" allows all host values through...
4177 */
4178
4179 if (!strcmp(a->name, "*"))
4180 return (1);
4181
4182 if (!_cups_strncasecmp(host, a->name, a->namelen))
4183 {
4184 /*
4185 * Prefix matches; check the character at the end - it must be ":", ".",
4186 * ".:", or nul...
4187 */
4188
4189 end = host + a->namelen;
4190
4191 if (!*end || *end == ':' || (*end == '.' && (!end[1] || end[1] == ':')))
4192 return (1);
4193 }
4194 }
4195
4196 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
4197 for (a = (cupsd_alias_t *)cupsArrayFirst(DNSSDAlias);
4198 a;
4199 a = (cupsd_alias_t *)cupsArrayNext(DNSSDAlias))
4200 {
4201 /*
4202 * "ServerAlias *" allows all host values through...
4203 */
4204
4205 if (!strcmp(a->name, "*"))
4206 return (1);
4207
4208 if (!_cups_strncasecmp(host, a->name, a->namelen))
4209 {
4210 /*
4211 * Prefix matches; check the character at the end - it must be ":", ".",
4212 * ".:", or nul...
4213 */
4214
4215 end = host + a->namelen;
4216
4217 if (!*end || *end == ':' || (*end == '.' && (!end[1] || end[1] == ':')))
4218 return (1);
4219 }
4220 }
4221 #endif /* HAVE_DNSSD || HAVE_AVAHI */
4222
4223 /*
4224 * Check for interface hostname matches...
4225 */
4226
4227 for (netif = (cupsd_netif_t *)cupsArrayFirst(NetIFList);
4228 netif;
4229 netif = (cupsd_netif_t *)cupsArrayNext(NetIFList))
4230 {
4231 if (!_cups_strncasecmp(host, netif->hostname, netif->hostlen))
4232 {
4233 /*
4234 * Prefix matches; check the character at the end - it must be ":", ".",
4235 * ".:", or nul...
4236 */
4237
4238 end = host + netif->hostlen;
4239
4240 if (!*end || *end == ':' || (*end == '.' && (!end[1] || end[1] == ':')))
4241 return (1);
4242 }
4243 }
4244
4245 return (0);
4246 }
4247
4248
4249 /*
4250 * 'write_file()' - Send a file via HTTP.
4251 */
4252
4253 static int /* O - 0 on failure, 1 on success */
4254 write_file(cupsd_client_t *con, /* I - Client connection */
4255 http_status_t code, /* I - HTTP status */
4256 char *filename, /* I - Filename */
4257 char *type, /* I - File type */
4258 struct stat *filestats) /* O - File information */
4259 {
4260 con->file = open(filename, O_RDONLY);
4261
4262 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4263 "[Client %d] write_file code=%d, filename=\"%s\" (%d), "
4264 "type=\"%s\", filestats=%p", con->http.fd,
4265 code, filename, con->file, type ? type : "(null)", filestats);
4266
4267 if (con->file < 0)
4268 return (0);
4269
4270 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
4271
4272 con->pipe_pid = 0;
4273
4274 if (!cupsdSendHeader(con, code, type, CUPSD_AUTH_NONE))
4275 return (0);
4276
4277 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
4278 httpGetDateString(filestats->st_mtime)) < 0)
4279 return (0);
4280 if (httpPrintf(HTTP(con), "Content-Length: " CUPS_LLFMT "\r\n",
4281 CUPS_LLCAST filestats->st_size) < 0)
4282 return (0);
4283 if (httpPrintf(HTTP(con), "\r\n") < 0)
4284 return (0);
4285
4286 if (cupsdFlushHeader(con) < 0)
4287 return (0);
4288
4289 con->http.data_encoding = HTTP_ENCODING_LENGTH;
4290 con->http.data_remaining = filestats->st_size;
4291
4292 if (con->http.data_remaining <= INT_MAX)
4293 con->http._data_remaining = con->http.data_remaining;
4294 else
4295 con->http._data_remaining = INT_MAX;
4296
4297 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient,
4298 (cupsd_selfunc_t)cupsdWriteClient, con);
4299
4300 return (1);
4301 }
4302
4303
4304 /*
4305 * 'write_pipe()' - Flag that data is available on the CGI pipe.
4306 */
4307
4308 static void
4309 write_pipe(cupsd_client_t *con) /* I - Client connection */
4310 {
4311 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4312 "[Client %d] write_pipe CGI output on fd %d",
4313 con->http.fd, con->file);
4314
4315 con->file_ready = 1;
4316
4317 cupsdRemoveSelect(con->file);
4318 cupsdAddSelect(con->http.fd, NULL, (cupsd_selfunc_t)cupsdWriteClient, con);
4319 }
4320
4321
4322 /*
4323 * End of "$Id: client.c 10886 2013-03-08 17:56:02Z mike $".
4324 */
Unnamed repository; edit this file 'description' to name the repository.