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Final sync-up with cups.org trunk repository
[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 int wused = con->http.wused; /* Previous write buffer use */
2878
2879 do
2880 {
2881 /*
2882 * Write a single attribute or the IPP message header...
2883 */
2884
2885 ipp_state = ippWrite(HTTP(con), con->response);
2886
2887 /*
2888 * If the write buffer has been flushed, stop buffering up attributes...
2889 */
2890
2891 if (con->http.wused <= wused)
2892 break;
2893 }
2894 while (ipp_state != IPP_STATE_DATA && ipp_state != IPP_STATE_ERROR);
2895
2896 if (con->http.wused > 0)
2897 httpFlushWrite(HTTP(con));
2898
2899 bytes = ipp_state != IPP_STATE_ERROR &&
2900 (con->file >= 0 || ipp_state != IPP_STATE_DATA);
2901 }
2902 else if ((bytes = read(con->file, con->header + con->header_used,
2903 sizeof(con->header) - con->header_used)) > 0)
2904 {
2905 con->header_used += bytes;
2906
2907 if (con->pipe_pid && !con->got_fields)
2908 {
2909 /*
2910 * Inspect the data for Content-Type and other fields.
2911 */
2912
2913 for (bufptr = con->header, bufend = con->header + con->header_used,
2914 field_col = 0;
2915 !con->got_fields && bufptr < bufend;
2916 bufptr ++)
2917 {
2918 if (*bufptr == '\n')
2919 {
2920 /*
2921 * Send line to client...
2922 */
2923
2924 if (bufptr > con->header && bufptr[-1] == '\r')
2925 bufptr[-1] = '\0';
2926 *bufptr++ = '\0';
2927
2928 cupsdLogMessage(CUPSD_LOG_DEBUG, "Script header: %s", con->header);
2929
2930 if (!con->sent_header)
2931 {
2932 /*
2933 * Handle redirection and CGI status codes...
2934 */
2935
2936 if (!_cups_strncasecmp(con->header, "Location:", 9))
2937 {
2938 if (!cupsdSendHeader(con, HTTP_SEE_OTHER, NULL, CUPSD_AUTH_NONE))
2939 {
2940 cupsdCloseClient(con);
2941 return;
2942 }
2943
2944 con->sent_header = 2;
2945
2946 if (httpPrintf(HTTP(con), "Content-Length: 0\r\n") < 0)
2947 return;
2948 }
2949 else if (!_cups_strncasecmp(con->header, "Status:", 7))
2950 {
2951 cupsdSendError(con, (http_status_t)atoi(con->header + 7),
2952 CUPSD_AUTH_NONE);
2953 con->sent_header = 2;
2954 }
2955 else
2956 {
2957 if (!cupsdSendHeader(con, HTTP_OK, NULL, CUPSD_AUTH_NONE))
2958 {
2959 cupsdCloseClient(con);
2960 return;
2961 }
2962
2963 con->sent_header = 1;
2964
2965 if (con->http.version == HTTP_1_1)
2966 {
2967 if (httpPrintf(HTTP(con), "Transfer-Encoding: chunked\r\n") < 0)
2968 return;
2969 }
2970 }
2971 }
2972
2973 if (_cups_strncasecmp(con->header, "Status:", 7))
2974 httpPrintf(HTTP(con), "%s\r\n", con->header);
2975
2976 /*
2977 * Update buffer...
2978 */
2979
2980 con->header_used -= bufptr - con->header;
2981
2982 if (con->header_used > 0)
2983 memmove(con->header, bufptr, con->header_used);
2984
2985 bufptr = con->header - 1;
2986
2987 /*
2988 * See if the line was empty...
2989 */
2990
2991 if (field_col == 0)
2992 {
2993 con->got_fields = 1;
2994
2995 if (cupsdFlushHeader(con) < 0)
2996 {
2997 cupsdCloseClient(con);
2998 return;
2999 }
3000
3001 if (con->http.version == HTTP_1_1)
3002 con->http.data_encoding = HTTP_ENCODING_CHUNKED;
3003 }
3004 else
3005 field_col = 0;
3006 }
3007 else if (*bufptr != '\r')
3008 field_col ++;
3009 }
3010
3011 if (!con->got_fields)
3012 {
3013 con->http.activity = time(NULL);
3014 return;
3015 }
3016 }
3017
3018 if (con->header_used > 0)
3019 {
3020 if (httpWrite2(HTTP(con), con->header, con->header_used) < 0)
3021 {
3022 cupsdLogMessage(CUPSD_LOG_DEBUG,
3023 "[Client %d] Closing for error %d (%s)",
3024 con->http.fd, con->http.error,
3025 strerror(con->http.error));
3026 cupsdCloseClient(con);
3027 return;
3028 }
3029
3030 if (con->http.data_encoding == HTTP_ENCODING_CHUNKED)
3031 httpFlushWrite(HTTP(con));
3032
3033 con->bytes += con->header_used;
3034
3035 if (con->http.state == HTTP_STATE_WAITING)
3036 bytes = 0;
3037 else
3038 bytes = con->header_used;
3039
3040 con->header_used = 0;
3041 }
3042 }
3043
3044 if (bytes <= 0 ||
3045 (con->http.state != HTTP_STATE_GET_SEND && con->http.state != HTTP_STATE_POST_SEND))
3046 {
3047 if (!con->sent_header && con->pipe_pid)
3048 cupsdSendError(con, HTTP_SERVER_ERROR, CUPSD_AUTH_NONE);
3049 else
3050 {
3051 cupsdLogRequest(con, HTTP_OK);
3052
3053 httpFlushWrite(HTTP(con));
3054
3055 if (con->http.data_encoding == HTTP_ENCODING_CHUNKED && con->sent_header == 1)
3056 {
3057 if (httpWrite2(HTTP(con), "", 0) < 0)
3058 {
3059 cupsdLogMessage(CUPSD_LOG_DEBUG,
3060 "[Client %d] Closing for error %d (%s)",
3061 con->http.fd, con->http.error,
3062 strerror(con->http.error));
3063 cupsdCloseClient(con);
3064 return;
3065 }
3066 }
3067 }
3068
3069 con->http.state = HTTP_STATE_WAITING;
3070
3071 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
3072
3073 if (con->file >= 0)
3074 {
3075 cupsdRemoveSelect(con->file);
3076
3077 if (con->pipe_pid)
3078 cupsdEndProcess(con->pipe_pid, 0);
3079
3080 close(con->file);
3081 con->file = -1;
3082 con->pipe_pid = 0;
3083 }
3084
3085 if (con->filename)
3086 {
3087 unlink(con->filename);
3088 cupsdClearString(&con->filename);
3089 }
3090
3091 if (con->request)
3092 {
3093 ippDelete(con->request);
3094 con->request = NULL;
3095 }
3096
3097 if (con->response)
3098 {
3099 ippDelete(con->response);
3100 con->response = NULL;
3101 }
3102
3103 cupsdClearString(&con->command);
3104 cupsdClearString(&con->options);
3105 cupsdClearString(&con->query_string);
3106
3107 if (!con->http.keep_alive)
3108 {
3109 cupsdLogMessage(CUPSD_LOG_DEBUG,
3110 "[Client %d] Closing because Keep-Alive disabled.",
3111 con->http.fd);
3112 cupsdCloseClient(con);
3113 return;
3114 }
3115 else
3116 {
3117 cupsArrayRemove(ActiveClients, con);
3118 cupsdSetBusyState();
3119 }
3120 }
3121
3122 con->http.activity = time(NULL);
3123 }
3124
3125
3126 /*
3127 * 'check_if_modified()' - Decode an "If-Modified-Since" line.
3128 */
3129
3130 static int /* O - 1 if modified since */
3131 check_if_modified(
3132 cupsd_client_t *con, /* I - Client connection */
3133 struct stat *filestats) /* I - File information */
3134 {
3135 char *ptr; /* Pointer into field */
3136 time_t date; /* Time/date value */
3137 off_t size; /* Size/length value */
3138
3139
3140 size = 0;
3141 date = 0;
3142 ptr = con->http.fields[HTTP_FIELD_IF_MODIFIED_SINCE];
3143
3144 if (*ptr == '\0')
3145 return (1);
3146
3147 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3148 "[Client %d] check_if_modified "
3149 "filestats=%p(" CUPS_LLFMT ", %d)) If-Modified-Since=\"%s\"",
3150 con->http.fd, filestats, CUPS_LLCAST filestats->st_size,
3151 (int)filestats->st_mtime, ptr);
3152
3153 while (*ptr != '\0')
3154 {
3155 while (isspace(*ptr) || *ptr == ';')
3156 ptr ++;
3157
3158 if (_cups_strncasecmp(ptr, "length=", 7) == 0)
3159 {
3160 ptr += 7;
3161 size = strtoll(ptr, NULL, 10);
3162
3163 while (isdigit(*ptr))
3164 ptr ++;
3165 }
3166 else if (isalpha(*ptr))
3167 {
3168 date = httpGetDateTime(ptr);
3169 while (*ptr != '\0' && *ptr != ';')
3170 ptr ++;
3171 }
3172 else
3173 ptr ++;
3174 }
3175
3176 return ((size != filestats->st_size && size != 0) ||
3177 (date < filestats->st_mtime && date != 0) ||
3178 (size == 0 && date == 0));
3179 }
3180
3181
3182 /*
3183 * 'compare_clients()' - Compare two client connections.
3184 */
3185
3186 static int /* O - Result of comparison */
3187 compare_clients(cupsd_client_t *a, /* I - First client */
3188 cupsd_client_t *b, /* I - Second client */
3189 void *data) /* I - User data (not used) */
3190 {
3191 (void)data;
3192
3193 if (a == b)
3194 return (0);
3195 else if (a < b)
3196 return (-1);
3197 else
3198 return (1);
3199 }
3200
3201
3202 /*
3203 * 'data_ready()' - Check whether data is available from a client.
3204 */
3205
3206 static int /* O - 1 if data is ready, 0 otherwise */
3207 data_ready(cupsd_client_t *con) /* I - Client */
3208 {
3209 if (con->http.used > 0)
3210 return (1);
3211 #ifdef HAVE_SSL
3212 else if (con->http.tls)
3213 {
3214 # ifdef HAVE_LIBSSL
3215 if (SSL_pending((SSL *)(con->http.tls)))
3216 return (1);
3217 # elif defined(HAVE_GNUTLS)
3218 if (gnutls_record_check_pending(con->http.tls))
3219 return (1);
3220 # elif defined(HAVE_CDSASSL)
3221 size_t bytes; /* Bytes that are available */
3222
3223 if (!SSLGetBufferedReadSize(con->http.tls, &bytes) && bytes > 0)
3224 return (1);
3225 # endif /* HAVE_LIBSSL */
3226 }
3227 #endif /* HAVE_SSL */
3228
3229 return (0);
3230 }
3231
3232
3233 /*
3234 * 'get_file()' - Get a filename and state info.
3235 */
3236
3237 static char * /* O - Real filename */
3238 get_file(cupsd_client_t *con, /* I - Client connection */
3239 struct stat *filestats, /* O - File information */
3240 char *filename, /* IO - Filename buffer */
3241 int len) /* I - Buffer length */
3242 {
3243 int status; /* Status of filesystem calls */
3244 char *ptr; /* Pointer info filename */
3245 int plen; /* Remaining length after pointer */
3246 char language[7]; /* Language subdirectory, if any */
3247
3248
3249 /*
3250 * Figure out the real filename...
3251 */
3252
3253 language[0] = '\0';
3254
3255 if (!strncmp(con->uri, "/ppd/", 5) && !strchr(con->uri + 5, '/'))
3256 snprintf(filename, len, "%s%s", ServerRoot, con->uri);
3257 else if (!strncmp(con->uri, "/icons/", 7) && !strchr(con->uri + 7, '/'))
3258 {
3259 snprintf(filename, len, "%s/%s", CacheDir, con->uri + 7);
3260 if (access(filename, F_OK) < 0)
3261 snprintf(filename, len, "%s/images/generic.png", DocumentRoot);
3262 }
3263 else if (!strncmp(con->uri, "/rss/", 5) && !strchr(con->uri + 5, '/'))
3264 snprintf(filename, len, "%s/rss/%s", CacheDir, con->uri + 5);
3265 else if (!strncmp(con->uri, "/admin/conf/", 12))
3266 snprintf(filename, len, "%s%s", ServerRoot, con->uri + 11);
3267 else if (!strncmp(con->uri, "/admin/log/", 11))
3268 {
3269 if (!strncmp(con->uri + 11, "access_log", 10) && AccessLog[0] == '/')
3270 strlcpy(filename, AccessLog, len);
3271 else if (!strncmp(con->uri + 11, "error_log", 9) && ErrorLog[0] == '/')
3272 strlcpy(filename, ErrorLog, len);
3273 else if (!strncmp(con->uri + 11, "page_log", 8) && PageLog[0] == '/')
3274 strlcpy(filename, PageLog, len);
3275 else
3276 return (NULL);
3277 }
3278 else if (con->language)
3279 {
3280 snprintf(language, sizeof(language), "/%s", con->language->language);
3281 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3282 }
3283 else
3284 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3285
3286 if ((ptr = strchr(filename, '?')) != NULL)
3287 *ptr = '\0';
3288
3289 /*
3290 * Grab the status for this language; if there isn't a language-specific file
3291 * then fallback to the default one...
3292 */
3293
3294 if ((status = stat(filename, filestats)) != 0 && language[0] &&
3295 strncmp(con->uri, "/icons/", 7) &&
3296 strncmp(con->uri, "/ppd/", 5) &&
3297 strncmp(con->uri, "/rss/", 5) &&
3298 strncmp(con->uri, "/admin/conf/", 12) &&
3299 strncmp(con->uri, "/admin/log/", 11))
3300 {
3301 /*
3302 * Drop the country code...
3303 */
3304
3305 language[3] = '\0';
3306 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3307
3308 if ((ptr = strchr(filename, '?')) != NULL)
3309 *ptr = '\0';
3310
3311 if ((status = stat(filename, filestats)) != 0)
3312 {
3313 /*
3314 * Drop the language prefix and try the root directory...
3315 */
3316
3317 language[0] = '\0';
3318 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3319
3320 if ((ptr = strchr(filename, '?')) != NULL)
3321 *ptr = '\0';
3322
3323 status = stat(filename, filestats);
3324 }
3325 }
3326
3327 /*
3328 * If we're found a directory, get the index.html file instead...
3329 */
3330
3331 if (!status && S_ISDIR(filestats->st_mode))
3332 {
3333 /*
3334 * Make sure the URI ends with a slash...
3335 */
3336
3337 if (con->uri[strlen(con->uri) - 1] != '/')
3338 strlcat(con->uri, "/", sizeof(con->uri));
3339
3340 /*
3341 * Find the directory index file, trying every language...
3342 */
3343
3344 do
3345 {
3346 if (status && language[0])
3347 {
3348 /*
3349 * Try a different language subset...
3350 */
3351
3352 if (language[3])
3353 language[0] = '\0'; /* Strip country code */
3354 else
3355 language[0] = '\0'; /* Strip language */
3356 }
3357
3358 /*
3359 * Look for the index file...
3360 */
3361
3362 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3363
3364 if ((ptr = strchr(filename, '?')) != NULL)
3365 *ptr = '\0';
3366
3367 ptr = filename + strlen(filename);
3368 plen = len - (ptr - filename);
3369
3370 strlcpy(ptr, "index.html", plen);
3371 status = stat(filename, filestats);
3372
3373 #ifdef HAVE_JAVA
3374 if (status)
3375 {
3376 strlcpy(ptr, "index.class", plen);
3377 status = stat(filename, filestats);
3378 }
3379 #endif /* HAVE_JAVA */
3380
3381 #ifdef HAVE_PERL
3382 if (status)
3383 {
3384 strlcpy(ptr, "index.pl", plen);
3385 status = stat(filename, filestats);
3386 }
3387 #endif /* HAVE_PERL */
3388
3389 #ifdef HAVE_PHP
3390 if (status)
3391 {
3392 strlcpy(ptr, "index.php", plen);
3393 status = stat(filename, filestats);
3394 }
3395 #endif /* HAVE_PHP */
3396
3397 #ifdef HAVE_PYTHON
3398 if (status)
3399 {
3400 strlcpy(ptr, "index.pyc", plen);
3401 status = stat(filename, filestats);
3402 }
3403
3404 if (status)
3405 {
3406 strlcpy(ptr, "index.py", plen);
3407 status = stat(filename, filestats);
3408 }
3409 #endif /* HAVE_PYTHON */
3410
3411 }
3412 while (status && language[0]);
3413 }
3414
3415 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3416 "[Client %d] get_file filestats=%p, filename=%p, len=%d, "
3417 "returning \"%s\".", con->http.fd, filestats, filename, len,
3418 status ? "(null)" : filename);
3419
3420 if (status)
3421 return (NULL);
3422 else
3423 return (filename);
3424 }
3425
3426
3427 /*
3428 * 'install_cupsd_conf()' - Install a configuration file.
3429 */
3430
3431 static http_status_t /* O - Status */
3432 install_cupsd_conf(cupsd_client_t *con) /* I - Connection */
3433 {
3434 char filename[1024]; /* Configuration filename */
3435 cups_file_t *in, /* Input file */
3436 *out; /* Output file */
3437 char buffer[16384]; /* Copy buffer */
3438 ssize_t bytes; /* Number of bytes */
3439
3440
3441 /*
3442 * Open the request file...
3443 */
3444
3445 if ((in = cupsFileOpen(con->filename, "rb")) == NULL)
3446 {
3447 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open request file \"%s\": %s",
3448 con->filename, strerror(errno));
3449 return (HTTP_SERVER_ERROR);
3450 }
3451
3452 /*
3453 * Open the new config file...
3454 */
3455
3456 if ((out = cupsdCreateConfFile(ConfigurationFile, ConfigFilePerm)) == NULL)
3457 {
3458 cupsFileClose(in);
3459 return (HTTP_SERVER_ERROR);
3460 }
3461
3462 cupsdLogMessage(CUPSD_LOG_INFO, "Installing config file \"%s\"...",
3463 ConfigurationFile);
3464
3465 /*
3466 * Copy from the request to the new config file...
3467 */
3468
3469 while ((bytes = cupsFileRead(in, buffer, sizeof(buffer))) > 0)
3470 if (cupsFileWrite(out, buffer, bytes) < bytes)
3471 {
3472 cupsdLogMessage(CUPSD_LOG_ERROR,
3473 "Unable to copy to config file \"%s\": %s",
3474 ConfigurationFile, strerror(errno));
3475
3476 cupsFileClose(in);
3477 cupsFileClose(out);
3478
3479 snprintf(filename, sizeof(filename), "%s.N", ConfigurationFile);
3480 cupsdUnlinkOrRemoveFile(filename);
3481
3482 return (HTTP_SERVER_ERROR);
3483 }
3484
3485 /*
3486 * Close the files...
3487 */
3488
3489 cupsFileClose(in);
3490
3491 if (cupsdCloseCreatedConfFile(out, ConfigurationFile))
3492 return (HTTP_SERVER_ERROR);
3493
3494 /*
3495 * Remove the request file...
3496 */
3497
3498 cupsdUnlinkOrRemoveFile(con->filename);
3499 cupsdClearString(&con->filename);
3500
3501 /*
3502 * Set the NeedReload flag...
3503 */
3504
3505 NeedReload = RELOAD_CUPSD;
3506 ReloadTime = time(NULL);
3507
3508 /*
3509 * Return that the file was created successfully...
3510 */
3511
3512 return (HTTP_CREATED);
3513 }
3514
3515
3516 /*
3517 * 'is_cgi()' - Is the resource a CGI script/program?
3518 */
3519
3520 static int /* O - 1 = CGI, 0 = file */
3521 is_cgi(cupsd_client_t *con, /* I - Client connection */
3522 const char *filename, /* I - Real filename */
3523 struct stat *filestats, /* I - File information */
3524 mime_type_t *type) /* I - MIME type */
3525 {
3526 const char *options; /* Options on URL */
3527
3528
3529 /*
3530 * Get the options, if any...
3531 */
3532
3533 if ((options = strchr(con->uri, '?')) != NULL)
3534 {
3535 options ++;
3536 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", options);
3537 }
3538
3539 /*
3540 * Check for known types...
3541 */
3542
3543 if (!type || _cups_strcasecmp(type->super, "application"))
3544 {
3545 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3546 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3547 "type=%s/%s, returning 0", con->http.fd, filename,
3548 filestats, type ? type->super : "unknown",
3549 type ? type->type : "unknown");
3550 return (0);
3551 }
3552
3553 if (!_cups_strcasecmp(type->type, "x-httpd-cgi") &&
3554 (filestats->st_mode & 0111))
3555 {
3556 /*
3557 * "application/x-httpd-cgi" is a CGI script.
3558 */
3559
3560 cupsdSetString(&con->command, filename);
3561
3562 if (options)
3563 cupsdSetStringf(&con->options, " %s", options);
3564
3565 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3566 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3567 "type=%s/%s, returning 1", con->http.fd, filename,
3568 filestats, type->super, type->type);
3569 return (1);
3570 }
3571 #ifdef HAVE_JAVA
3572 else if (!_cups_strcasecmp(type->type, "x-httpd-java"))
3573 {
3574 /*
3575 * "application/x-httpd-java" is a Java servlet.
3576 */
3577
3578 cupsdSetString(&con->command, CUPS_JAVA);
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_JAVA */
3592 #ifdef HAVE_PERL
3593 else if (!_cups_strcasecmp(type->type, "x-httpd-perl"))
3594 {
3595 /*
3596 * "application/x-httpd-perl" is a Perl page.
3597 */
3598
3599 cupsdSetString(&con->command, CUPS_PERL);
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_PERL */
3613 #ifdef HAVE_PHP
3614 else if (!_cups_strcasecmp(type->type, "x-httpd-php"))
3615 {
3616 /*
3617 * "application/x-httpd-php" is a PHP page.
3618 */
3619
3620 cupsdSetString(&con->command, CUPS_PHP);
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_PHP */
3634 #ifdef HAVE_PYTHON
3635 else if (!_cups_strcasecmp(type->type, "x-httpd-python"))
3636 {
3637 /*
3638 * "application/x-httpd-python" is a Python page.
3639 */
3640
3641 cupsdSetString(&con->command, CUPS_PYTHON);
3642
3643 if (options)
3644 cupsdSetStringf(&con->options, " %s %s", filename, options);
3645 else
3646 cupsdSetStringf(&con->options, " %s", filename);
3647
3648 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3649 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3650 "type=%s/%s, returning 1", con->http.fd, filename,
3651 filestats, type->super, type->type);
3652 return (1);
3653 }
3654 #endif /* HAVE_PYTHON */
3655
3656 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3657 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3658 "type=%s/%s, returning 0", con->http.fd, filename,
3659 filestats, type->super, type->type);
3660 return (0);
3661 }
3662
3663
3664 /*
3665 * 'is_path_absolute()' - Is a path absolute and free of relative elements (i.e. "..").
3666 */
3667
3668 static int /* O - 0 if relative, 1 if absolute */
3669 is_path_absolute(const char *path) /* I - Input path */
3670 {
3671 /*
3672 * Check for a leading slash...
3673 */
3674
3675 if (path[0] != '/')
3676 return (0);
3677
3678 /*
3679 * Check for "/.." in the path...
3680 */
3681
3682 while ((path = strstr(path, "/..")) != NULL)
3683 {
3684 if (!path[3] || path[3] == '/')
3685 return (0);
3686
3687 path ++;
3688 }
3689
3690 /*
3691 * If we haven't found any relative paths, return 1 indicating an
3692 * absolute path...
3693 */
3694
3695 return (1);
3696 }
3697
3698
3699 /*
3700 * 'pipe_command()' - Pipe the output of a command to the remote client.
3701 */
3702
3703 static int /* O - Process ID */
3704 pipe_command(cupsd_client_t *con, /* I - Client connection */
3705 int infile, /* I - Standard input for command */
3706 int *outfile, /* O - Standard output for command */
3707 char *command, /* I - Command to run */
3708 char *options, /* I - Options for command */
3709 int root) /* I - Run as root? */
3710 {
3711 int i; /* Looping var */
3712 int pid; /* Process ID */
3713 char *commptr, /* Command string pointer */
3714 commch; /* Command string character */
3715 char *uriptr; /* URI string pointer */
3716 int fds[2]; /* Pipe FDs */
3717 int argc; /* Number of arguments */
3718 int envc; /* Number of environment variables */
3719 char argbuf[10240], /* Argument buffer */
3720 *argv[100], /* Argument strings */
3721 *envp[MAX_ENV + 20]; /* Environment variables */
3722 char auth_type[256], /* AUTH_TYPE environment variable */
3723 content_length[1024], /* CONTENT_LENGTH environment variable */
3724 content_type[1024], /* CONTENT_TYPE environment variable */
3725 http_cookie[32768], /* HTTP_COOKIE environment variable */
3726 http_referer[1024], /* HTTP_REFERER environment variable */
3727 http_user_agent[1024], /* HTTP_USER_AGENT environment variable */
3728 lang[1024], /* LANG environment variable */
3729 path_info[1024], /* PATH_INFO environment variable */
3730 remote_addr[1024], /* REMOTE_ADDR environment variable */
3731 remote_host[1024], /* REMOTE_HOST environment variable */
3732 remote_user[1024], /* REMOTE_USER environment variable */
3733 script_filename[1024], /* SCRIPT_FILENAME environment variable */
3734 script_name[1024], /* SCRIPT_NAME environment variable */
3735 server_name[1024], /* SERVER_NAME environment variable */
3736 server_port[1024]; /* SERVER_PORT environment variable */
3737 ipp_attribute_t *attr; /* attributes-natural-language attribute */
3738
3739
3740 /*
3741 * Parse a copy of the options string, which is of the form:
3742 *
3743 * argument+argument+argument
3744 * ?argument+argument+argument
3745 * param=value&param=value
3746 * ?param=value&param=value
3747 * /name?argument+argument+argument
3748 * /name?param=value&param=value
3749 *
3750 * If the string contains an "=" character after the initial name,
3751 * then we treat it as a HTTP GET form request and make a copy of
3752 * the remaining string for the environment variable.
3753 *
3754 * The string is always parsed out as command-line arguments, to
3755 * be consistent with Apache...
3756 */
3757
3758 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3759 "[Client %d] pipe_command infile=%d, outfile=%p, "
3760 "command=\"%s\", options=\"%s\", root=%d",
3761 con->http.fd, infile, outfile, command,
3762 options ? options : "(null)", root);
3763
3764 argv[0] = command;
3765
3766 if (options)
3767 {
3768 commptr = options;
3769 if (*commptr == ' ')
3770 commptr ++;
3771 strlcpy(argbuf, commptr, sizeof(argbuf));
3772 }
3773 else
3774 argbuf[0] = '\0';
3775
3776 if (argbuf[0] == '/')
3777 {
3778 /*
3779 * Found some trailing path information, set PATH_INFO...
3780 */
3781
3782 if ((commptr = strchr(argbuf, '?')) == NULL)
3783 commptr = argbuf + strlen(argbuf);
3784
3785 commch = *commptr;
3786 *commptr = '\0';
3787 snprintf(path_info, sizeof(path_info), "PATH_INFO=%s", argbuf);
3788 *commptr = commch;
3789 }
3790 else
3791 {
3792 commptr = argbuf;
3793 path_info[0] = '\0';
3794
3795 if (*commptr == ' ')
3796 commptr ++;
3797 }
3798
3799 if (*commptr == '?' && con->operation == HTTP_STATE_GET && !con->query_string)
3800 {
3801 commptr ++;
3802 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", commptr);
3803 }
3804
3805 argc = 1;
3806
3807 if (*commptr)
3808 {
3809 argv[argc ++] = commptr;
3810
3811 for (; *commptr && argc < 99; commptr ++)
3812 {
3813 /*
3814 * Break arguments whenever we see a + or space...
3815 */
3816
3817 if (*commptr == ' ' || *commptr == '+')
3818 {
3819 while (*commptr == ' ' || *commptr == '+')
3820 *commptr++ = '\0';
3821
3822 /*
3823 * If we don't have a blank string, save it as another argument...
3824 */
3825
3826 if (*commptr)
3827 {
3828 argv[argc] = commptr;
3829 argc ++;
3830 }
3831 else
3832 break;
3833 }
3834 else if (*commptr == '%' && isxdigit(commptr[1] & 255) &&
3835 isxdigit(commptr[2] & 255))
3836 {
3837 /*
3838 * Convert the %xx notation to the individual character.
3839 */
3840
3841 if (commptr[1] >= '0' && commptr[1] <= '9')
3842 *commptr = (commptr[1] - '0') << 4;
3843 else
3844 *commptr = (tolower(commptr[1]) - 'a' + 10) << 4;
3845
3846 if (commptr[2] >= '0' && commptr[2] <= '9')
3847 *commptr |= commptr[2] - '0';
3848 else
3849 *commptr |= tolower(commptr[2]) - 'a' + 10;
3850
3851 _cups_strcpy(commptr + 1, commptr + 3);
3852
3853 /*
3854 * Check for a %00 and break if that is the case...
3855 */
3856
3857 if (!*commptr)
3858 break;
3859 }
3860 }
3861 }
3862
3863 argv[argc] = NULL;
3864
3865 /*
3866 * Setup the environment variables as needed...
3867 */
3868
3869 if (con->username[0])
3870 {
3871 snprintf(auth_type, sizeof(auth_type), "AUTH_TYPE=%s",
3872 httpGetField(HTTP(con), HTTP_FIELD_AUTHORIZATION));
3873
3874 if ((uriptr = strchr(auth_type + 10, ' ')) != NULL)
3875 *uriptr = '\0';
3876 }
3877 else
3878 auth_type[0] = '\0';
3879
3880 if (con->request &&
3881 (attr = ippFindAttribute(con->request, "attributes-natural-language",
3882 IPP_TAG_LANGUAGE)) != NULL)
3883 {
3884 switch (strlen(attr->values[0].string.text))
3885 {
3886 default :
3887 /*
3888 * This is an unknown or badly formatted language code; use
3889 * the POSIX locale...
3890 */
3891
3892 strlcpy(lang, "LANG=C", sizeof(lang));
3893 break;
3894
3895 case 2 :
3896 /*
3897 * Just the language code (ll)...
3898 */
3899
3900 snprintf(lang, sizeof(lang), "LANG=%s.UTF8",
3901 attr->values[0].string.text);
3902 break;
3903
3904 case 5 :
3905 /*
3906 * Language and country code (ll-cc)...
3907 */
3908
3909 snprintf(lang, sizeof(lang), "LANG=%c%c_%c%c.UTF8",
3910 attr->values[0].string.text[0],
3911 attr->values[0].string.text[1],
3912 toupper(attr->values[0].string.text[3] & 255),
3913 toupper(attr->values[0].string.text[4] & 255));
3914 break;
3915 }
3916 }
3917 else if (con->language)
3918 snprintf(lang, sizeof(lang), "LANG=%s.UTF8", con->language->language);
3919 else
3920 strlcpy(lang, "LANG=C", sizeof(lang));
3921
3922 strlcpy(remote_addr, "REMOTE_ADDR=", sizeof(remote_addr));
3923 httpAddrString(con->http.hostaddr, remote_addr + 12,
3924 sizeof(remote_addr) - 12);
3925
3926 snprintf(remote_host, sizeof(remote_host), "REMOTE_HOST=%s",
3927 con->http.hostname);
3928
3929 snprintf(script_name, sizeof(script_name), "SCRIPT_NAME=%s", con->uri);
3930 if ((uriptr = strchr(script_name, '?')) != NULL)
3931 *uriptr = '\0';
3932
3933 snprintf(script_filename, sizeof(script_filename), "SCRIPT_FILENAME=%s%s",
3934 DocumentRoot, script_name + 12);
3935
3936 sprintf(server_port, "SERVER_PORT=%d", con->serverport);
3937
3938 if (con->http.fields[HTTP_FIELD_HOST][0])
3939 {
3940 char *nameptr; /* Pointer to ":port" */
3941
3942 snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s",
3943 con->http.fields[HTTP_FIELD_HOST]);
3944 if ((nameptr = strrchr(server_name, ':')) != NULL && !strchr(nameptr, ']'))
3945 *nameptr = '\0'; /* Strip trailing ":port" */
3946 }
3947 else
3948 snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s",
3949 con->servername);
3950
3951 envc = cupsdLoadEnv(envp, (int)(sizeof(envp) / sizeof(envp[0])));
3952
3953 if (auth_type[0])
3954 envp[envc ++] = auth_type;
3955
3956 envp[envc ++] = lang;
3957 envp[envc ++] = "REDIRECT_STATUS=1";
3958 envp[envc ++] = "GATEWAY_INTERFACE=CGI/1.1";
3959 envp[envc ++] = server_name;
3960 envp[envc ++] = server_port;
3961 envp[envc ++] = remote_addr;
3962 envp[envc ++] = remote_host;
3963 envp[envc ++] = script_name;
3964 envp[envc ++] = script_filename;
3965
3966 if (path_info[0])
3967 envp[envc ++] = path_info;
3968
3969 if (con->username[0])
3970 {
3971 snprintf(remote_user, sizeof(remote_user), "REMOTE_USER=%s", con->username);
3972
3973 envp[envc ++] = remote_user;
3974 }
3975
3976 if (con->http.version == HTTP_1_1)
3977 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.1";
3978 else if (con->http.version == HTTP_1_0)
3979 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.0";
3980 else
3981 envp[envc ++] = "SERVER_PROTOCOL=HTTP/0.9";
3982
3983 if (con->http.cookie)
3984 {
3985 snprintf(http_cookie, sizeof(http_cookie), "HTTP_COOKIE=%s",
3986 con->http.cookie);
3987 envp[envc ++] = http_cookie;
3988 }
3989
3990 if (con->http.fields[HTTP_FIELD_USER_AGENT][0])
3991 {
3992 snprintf(http_user_agent, sizeof(http_user_agent), "HTTP_USER_AGENT=%s",
3993 con->http.fields[HTTP_FIELD_USER_AGENT]);
3994 envp[envc ++] = http_user_agent;
3995 }
3996
3997 if (con->http.fields[HTTP_FIELD_REFERER][0])
3998 {
3999 snprintf(http_referer, sizeof(http_referer), "HTTP_REFERER=%s",
4000 con->http.fields[HTTP_FIELD_REFERER]);
4001 envp[envc ++] = http_referer;
4002 }
4003
4004 if (con->operation == HTTP_STATE_GET)
4005 {
4006 envp[envc ++] = "REQUEST_METHOD=GET";
4007
4008 if (con->query_string)
4009 {
4010 /*
4011 * Add GET form variables after ?...
4012 */
4013
4014 envp[envc ++] = con->query_string;
4015 }
4016 else
4017 envp[envc ++] = "QUERY_STRING=";
4018 }
4019 else
4020 {
4021 sprintf(content_length, "CONTENT_LENGTH=" CUPS_LLFMT,
4022 CUPS_LLCAST con->bytes);
4023 snprintf(content_type, sizeof(content_type), "CONTENT_TYPE=%s",
4024 con->http.fields[HTTP_FIELD_CONTENT_TYPE]);
4025
4026 envp[envc ++] = "REQUEST_METHOD=POST";
4027 envp[envc ++] = content_length;
4028 envp[envc ++] = content_type;
4029 }
4030
4031 /*
4032 * Tell the CGI if we are using encryption...
4033 */
4034
4035 if (con->http.tls)
4036 envp[envc ++] = "HTTPS=ON";
4037
4038 /*
4039 * Terminate the environment array...
4040 */
4041
4042 envp[envc] = NULL;
4043
4044 if (LogLevel >= CUPSD_LOG_DEBUG)
4045 {
4046 for (i = 0; i < argc; i ++)
4047 cupsdLogMessage(CUPSD_LOG_DEBUG,
4048 "[CGI] argv[%d] = \"%s\"", i, argv[i]);
4049 for (i = 0; i < envc; i ++)
4050 cupsdLogMessage(CUPSD_LOG_DEBUG,
4051 "[CGI] envp[%d] = \"%s\"", i, envp[i]);
4052 }
4053
4054 /*
4055 * Create a pipe for the output...
4056 */
4057
4058 if (cupsdOpenPipe(fds))
4059 {
4060 cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to create pipe for %s - %s",
4061 argv[0], strerror(errno));
4062 return (0);
4063 }
4064
4065 /*
4066 * Then execute the command...
4067 */
4068
4069 if (cupsdStartProcess(command, argv, envp, infile, fds[1], CGIPipes[1],
4070 -1, -1, root, DefaultProfile, NULL, &pid) < 0)
4071 {
4072 /*
4073 * Error - can't fork!
4074 */
4075
4076 cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to start %s - %s", argv[0],
4077 strerror(errno));
4078
4079 cupsdClosePipe(fds);
4080 pid = 0;
4081 }
4082 else
4083 {
4084 /*
4085 * Fork successful - return the PID...
4086 */
4087
4088 if (con->username[0])
4089 cupsdAddCert(pid, con->username, con->type);
4090
4091 cupsdLogMessage(CUPSD_LOG_DEBUG, "[CGI] Started %s (PID %d)", command, pid);
4092
4093 *outfile = fds[0];
4094 close(fds[1]);
4095 }
4096
4097 return (pid);
4098 }
4099
4100
4101 /*
4102 * 'valid_host()' - Is the Host: field valid?
4103 */
4104
4105 static int /* O - 1 if valid, 0 if not */
4106 valid_host(cupsd_client_t *con) /* I - Client connection */
4107 {
4108 cupsd_alias_t *a; /* Current alias */
4109 cupsd_netif_t *netif; /* Current network interface */
4110 const char *host, /* Host field */
4111 *end; /* End character */
4112
4113
4114 host = con->http.fields[HTTP_FIELD_HOST];
4115
4116 if (httpAddrLocalhost(con->http.hostaddr))
4117 {
4118 /*
4119 * Only allow "localhost" or the equivalent IPv4 or IPv6 numerical
4120 * addresses when accessing CUPS via the loopback interface...
4121 */
4122
4123 return (!_cups_strcasecmp(host, "localhost") ||
4124 !_cups_strncasecmp(host, "localhost:", 10) ||
4125 !_cups_strcasecmp(host, "localhost.") ||
4126 !_cups_strncasecmp(host, "localhost.:", 11) ||
4127 #ifdef __linux
4128 !_cups_strcasecmp(host, "localhost.localdomain") ||
4129 !_cups_strncasecmp(host, "localhost.localdomain:", 22) ||
4130 #endif /* __linux */
4131 !strcmp(host, "127.0.0.1") ||
4132 !strncmp(host, "127.0.0.1:", 10) ||
4133 !strcmp(host, "[::1]") ||
4134 !strncmp(host, "[::1]:", 6));
4135 }
4136
4137 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
4138 /*
4139 * Check if the hostname is something.local (Bonjour); if so, allow it.
4140 */
4141
4142 if ((end = strrchr(host, '.')) != NULL && end > host &&
4143 (!end[1] || end[1] == ':'))
4144 {
4145 /*
4146 * "." on end, work back to second-to-last "."...
4147 */
4148 for (end --; end > host && *end != '.'; end --);
4149 }
4150
4151 if (end && (!_cups_strcasecmp(end, ".local") ||
4152 !_cups_strncasecmp(end, ".local:", 7) ||
4153 !_cups_strcasecmp(end, ".local.") ||
4154 !_cups_strncasecmp(end, ".local.:", 8)))
4155 return (1);
4156 #endif /* HAVE_DNSSD || HAVE_AVAHI */
4157
4158 /*
4159 * Check if the hostname is an IP address...
4160 */
4161
4162 if (isdigit(*host & 255) || *host == '[')
4163 {
4164 /*
4165 * Possible IPv4/IPv6 address...
4166 */
4167
4168 char temp[1024], /* Temporary string */
4169 *ptr; /* Pointer into temporary string */
4170 http_addrlist_t *addrlist; /* List of addresses */
4171
4172
4173 strlcpy(temp, host, sizeof(temp));
4174 if ((ptr = strrchr(temp, ':')) != NULL && !strchr(ptr, ']'))
4175 *ptr = '\0'; /* Strip :port from host value */
4176
4177 if ((addrlist = httpAddrGetList(temp, AF_UNSPEC, NULL)) != NULL)
4178 {
4179 /*
4180 * Good IPv4/IPv6 address...
4181 */
4182
4183 httpAddrFreeList(addrlist);
4184 return (1);
4185 }
4186 }
4187
4188 /*
4189 * Check for (alias) name matches...
4190 */
4191
4192 for (a = (cupsd_alias_t *)cupsArrayFirst(ServerAlias);
4193 a;
4194 a = (cupsd_alias_t *)cupsArrayNext(ServerAlias))
4195 {
4196 /*
4197 * "ServerAlias *" allows all host values through...
4198 */
4199
4200 if (!strcmp(a->name, "*"))
4201 return (1);
4202
4203 if (!_cups_strncasecmp(host, a->name, a->namelen))
4204 {
4205 /*
4206 * Prefix matches; check the character at the end - it must be ":", ".",
4207 * ".:", or nul...
4208 */
4209
4210 end = host + a->namelen;
4211
4212 if (!*end || *end == ':' || (*end == '.' && (!end[1] || end[1] == ':')))
4213 return (1);
4214 }
4215 }
4216
4217 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
4218 for (a = (cupsd_alias_t *)cupsArrayFirst(DNSSDAlias);
4219 a;
4220 a = (cupsd_alias_t *)cupsArrayNext(DNSSDAlias))
4221 {
4222 /*
4223 * "ServerAlias *" allows all host values through...
4224 */
4225
4226 if (!strcmp(a->name, "*"))
4227 return (1);
4228
4229 if (!_cups_strncasecmp(host, a->name, a->namelen))
4230 {
4231 /*
4232 * Prefix matches; check the character at the end - it must be ":", ".",
4233 * ".:", or nul...
4234 */
4235
4236 end = host + a->namelen;
4237
4238 if (!*end || *end == ':' || (*end == '.' && (!end[1] || end[1] == ':')))
4239 return (1);
4240 }
4241 }
4242 #endif /* HAVE_DNSSD || HAVE_AVAHI */
4243
4244 /*
4245 * Check for interface hostname matches...
4246 */
4247
4248 for (netif = (cupsd_netif_t *)cupsArrayFirst(NetIFList);
4249 netif;
4250 netif = (cupsd_netif_t *)cupsArrayNext(NetIFList))
4251 {
4252 if (!_cups_strncasecmp(host, netif->hostname, netif->hostlen))
4253 {
4254 /*
4255 * Prefix matches; check the character at the end - it must be ":", ".",
4256 * ".:", or nul...
4257 */
4258
4259 end = host + netif->hostlen;
4260
4261 if (!*end || *end == ':' || (*end == '.' && (!end[1] || end[1] == ':')))
4262 return (1);
4263 }
4264 }
4265
4266 return (0);
4267 }
4268
4269
4270 /*
4271 * 'write_file()' - Send a file via HTTP.
4272 */
4273
4274 static int /* O - 0 on failure, 1 on success */
4275 write_file(cupsd_client_t *con, /* I - Client connection */
4276 http_status_t code, /* I - HTTP status */
4277 char *filename, /* I - Filename */
4278 char *type, /* I - File type */
4279 struct stat *filestats) /* O - File information */
4280 {
4281 con->file = open(filename, O_RDONLY);
4282
4283 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4284 "[Client %d] write_file code=%d, filename=\"%s\" (%d), "
4285 "type=\"%s\", filestats=%p", con->http.fd,
4286 code, filename, con->file, type ? type : "(null)", filestats);
4287
4288 if (con->file < 0)
4289 return (0);
4290
4291 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
4292
4293 con->pipe_pid = 0;
4294
4295 if (!cupsdSendHeader(con, code, type, CUPSD_AUTH_NONE))
4296 return (0);
4297
4298 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
4299 httpGetDateString(filestats->st_mtime)) < 0)
4300 return (0);
4301 if (httpPrintf(HTTP(con), "Content-Length: " CUPS_LLFMT "\r\n",
4302 CUPS_LLCAST filestats->st_size) < 0)
4303 return (0);
4304 if (httpPrintf(HTTP(con), "\r\n") < 0)
4305 return (0);
4306
4307 if (cupsdFlushHeader(con) < 0)
4308 return (0);
4309
4310 con->http.data_encoding = HTTP_ENCODING_LENGTH;
4311 con->http.data_remaining = filestats->st_size;
4312
4313 if (con->http.data_remaining <= INT_MAX)
4314 con->http._data_remaining = con->http.data_remaining;
4315 else
4316 con->http._data_remaining = INT_MAX;
4317
4318 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient,
4319 (cupsd_selfunc_t)cupsdWriteClient, con);
4320
4321 return (1);
4322 }
4323
4324
4325 /*
4326 * 'write_pipe()' - Flag that data is available on the CGI pipe.
4327 */
4328
4329 static void
4330 write_pipe(cupsd_client_t *con) /* I - Client connection */
4331 {
4332 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4333 "[Client %d] write_pipe CGI output on fd %d",
4334 con->http.fd, con->file);
4335
4336 con->file_ready = 1;
4337
4338 cupsdRemoveSelect(con->file);
4339 cupsdAddSelect(con->http.fd, NULL, (cupsd_selfunc_t)cupsdWriteClient, con);
4340 }
4341
4342
4343 /*
4344 * End of "$Id: client.c 10886 2013-03-08 17:56:02Z mike $".
4345 */
Unnamed repository; edit this file 'description' to name the repository.