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Localize HTTP status codes based on Accept-Lanaguage (<rdar://problem/14201195>)
[thirdparty/cups.git] / scheduler / client.c
1 /*
2 * "$Id$"
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 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] Waiting for request.",
475 con->http.fd);
476
477 /*
478 * Temporarily suspend accept()'s until we lose a client...
479 */
480
481 if (cupsArrayCount(Clients) == MaxClients)
482 cupsdPauseListening();
483
484 #ifdef HAVE_SSL
485 /*
486 * See if we are connecting on a secure port...
487 */
488
489 if (lis->encryption == HTTP_ENCRYPT_ALWAYS)
490 {
491 /*
492 * https connection; go secure...
493 */
494
495 con->http.encryption = HTTP_ENCRYPT_ALWAYS;
496
497 if (!cupsdStartTLS(con))
498 cupsdCloseClient(con);
499 }
500 else
501 con->auto_ssl = 1;
502 #endif /* HAVE_SSL */
503 }
504
505
506 /*
507 * 'cupsdCloseAllClients()' - Close all remote clients immediately.
508 */
509
510 void
511 cupsdCloseAllClients(void)
512 {
513 cupsd_client_t *con; /* Current client */
514
515
516 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCloseAllClients() Clients=%d",
517 cupsArrayCount(Clients));
518
519 for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
520 con;
521 con = (cupsd_client_t *)cupsArrayNext(Clients))
522 if (cupsdCloseClient(con))
523 cupsdCloseClient(con);
524 }
525
526
527 /*
528 * 'cupsdCloseClient()' - Close a remote client.
529 */
530
531 int /* O - 1 if partial close, 0 if fully closed */
532 cupsdCloseClient(cupsd_client_t *con) /* I - Client to close */
533 {
534 int partial; /* Do partial close for SSL? */
535 #ifdef HAVE_LIBSSL
536 #elif defined(HAVE_GNUTLS)
537 # elif defined(HAVE_CDSASSL)
538 #endif /* HAVE_LIBSSL */
539
540
541 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] Closing connection.",
542 con->http.fd);
543
544 /*
545 * Flush pending writes before closing...
546 */
547
548 httpFlushWrite(HTTP(con));
549
550 partial = 0;
551
552 #ifdef HAVE_SSL
553 /*
554 * Shutdown encryption as needed...
555 */
556
557 if (con->http.tls)
558 {
559 partial = 1;
560
561 cupsdEndTLS(con);
562 }
563 #endif /* HAVE_SSL */
564
565 if (con->pipe_pid != 0)
566 {
567 /*
568 * Stop any CGI process...
569 */
570
571 cupsdEndProcess(con->pipe_pid, 1);
572 con->pipe_pid = 0;
573 }
574
575 if (con->file >= 0)
576 {
577 cupsdRemoveSelect(con->file);
578
579 close(con->file);
580 con->file = -1;
581 }
582
583 /*
584 * Close the socket and clear the file from the input set for select()...
585 */
586
587 if (con->http.fd >= 0)
588 {
589 cupsArrayRemove(ActiveClients, con);
590 cupsdSetBusyState();
591
592 if (partial)
593 {
594 /*
595 * Only do a partial close so that the encrypted client gets everything.
596 */
597
598 shutdown(con->http.fd, 0);
599 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
600
601 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] Waiting for socket close.",
602 con->http.fd);
603 }
604 else
605 {
606 /*
607 * Shut the socket down fully...
608 */
609
610 cupsdRemoveSelect(con->http.fd);
611 close(con->http.fd);
612 con->http.fd = -1;
613 }
614 }
615
616 if (!partial)
617 {
618 /*
619 * Free memory...
620 */
621
622 if (con->http.input_set)
623 free(con->http.input_set);
624
625 httpClearCookie(HTTP(con));
626 httpClearFields(HTTP(con));
627
628 cupsdClearString(&con->filename);
629 cupsdClearString(&con->command);
630 cupsdClearString(&con->options);
631 cupsdClearString(&con->query_string);
632
633 if (con->request)
634 {
635 ippDelete(con->request);
636 con->request = NULL;
637 }
638
639 if (con->response)
640 {
641 ippDelete(con->response);
642 con->response = NULL;
643 }
644
645 if (con->language)
646 {
647 cupsLangFree(con->language);
648 con->language = NULL;
649 }
650
651 #ifdef HAVE_AUTHORIZATION_H
652 if (con->authref)
653 {
654 AuthorizationFree(con->authref, kAuthorizationFlagDefaults);
655 con->authref = NULL;
656 }
657 #endif /* HAVE_AUTHORIZATION_H */
658
659 /*
660 * Re-enable new client connections if we are going back under the
661 * limit...
662 */
663
664 if (cupsArrayCount(Clients) == MaxClients)
665 cupsdResumeListening();
666
667 /*
668 * Compact the list of clients as necessary...
669 */
670
671 cupsArrayRemove(Clients, con);
672
673 free(con);
674 }
675
676 return (partial);
677 }
678
679
680 /*
681 * 'cupsdFlushHeader()' - Flush the header fields to the client.
682 */
683
684 int /* I - Bytes written or -1 on error */
685 cupsdFlushHeader(cupsd_client_t *con) /* I - Client to flush to */
686 {
687 int bytes = httpFlushWrite(HTTP(con));
688
689 con->http.data_encoding = HTTP_ENCODING_LENGTH;
690
691 return (bytes);
692 }
693
694
695 /*
696 * 'cupsdReadClient()' - Read data from a client.
697 */
698
699 void
700 cupsdReadClient(cupsd_client_t *con) /* I - Client to read from */
701 {
702 char line[32768], /* Line from client... */
703 operation[64], /* Operation code from socket */
704 version[64], /* HTTP version number string */
705 locale[64], /* Locale */
706 *ptr; /* Pointer into strings */
707 int major, minor; /* HTTP version numbers */
708 http_status_t status; /* Transfer status */
709 ipp_state_t ipp_state; /* State of IPP transfer */
710 int bytes; /* Number of bytes to POST */
711 char *filename; /* Name of file for GET/HEAD */
712 char buf[1024]; /* Buffer for real filename */
713 struct stat filestats; /* File information */
714 mime_type_t *type; /* MIME type of file */
715 cupsd_printer_t *p; /* Printer */
716 static unsigned request_id = 0; /* Request ID for temp files */
717
718
719 status = HTTP_CONTINUE;
720
721 cupsdLogMessage(CUPSD_LOG_DEBUG2,
722 "[Client %d] cupsdReadClient "
723 "error=%d, "
724 "used=%d, "
725 "state=%s, "
726 "data_encoding=HTTP_ENCODING_%s, "
727 "data_remaining=" CUPS_LLFMT ", "
728 "request=%p(%s), "
729 "file=%d",
730 con->http.fd, con->http.error, con->http.used,
731 http_states[con->http.state + 1],
732 con->http.data_encoding == HTTP_ENCODING_CHUNKED ?
733 "CHUNKED" : "LENGTH",
734 CUPS_LLCAST con->http.data_remaining,
735 con->request,
736 con->request ? ipp_states[con->request->state] : "",
737 con->file);
738
739 #ifdef HAVE_SSL
740 if (con->auto_ssl)
741 {
742 /*
743 * Automatically check for a SSL/TLS handshake...
744 */
745
746 con->auto_ssl = 0;
747
748 if (recv(con->http.fd, buf, 1, MSG_PEEK) == 1 &&
749 (!buf[0] || !strchr("DGHOPT", buf[0])))
750 {
751 /*
752 * Encrypt this connection...
753 */
754
755 cupsdLogMessage(CUPSD_LOG_DEBUG2,
756 "[Client %d] Saw first byte %02X, auto-negotiating "
757 "SSL/TLS session.", con->http.fd, buf[0] & 255);
758
759 if (!cupsdStartTLS(con))
760 cupsdCloseClient(con);
761
762 return;
763 }
764 }
765 #endif /* HAVE_SSL */
766
767 switch (con->http.state)
768 {
769 case HTTP_STATE_WAITING :
770 /*
771 * See if we've received a request line...
772 */
773
774 if (httpGets(line, sizeof(line) - 1, HTTP(con)) == NULL)
775 {
776 if (con->http.error && con->http.error != EPIPE)
777 cupsdLogMessage(CUPSD_LOG_DEBUG,
778 "[Client %d] HTTP_STATE_WAITING Closing for error %d "
779 "(%s)", con->http.fd, con->http.error,
780 strerror(con->http.error));
781 else
782 cupsdLogMessage(CUPSD_LOG_DEBUG,
783 "[Client %d] HTTP_STATE_WAITING Closing on EOF",
784 con->http.fd);
785
786 cupsdCloseClient(con);
787 return;
788 }
789
790 /*
791 * Ignore blank request lines...
792 */
793
794 if (line[0] == '\0')
795 break;
796
797 /*
798 * Clear other state variables...
799 */
800
801 httpClearFields(HTTP(con));
802
803 con->http.activity = time(NULL);
804 con->http.version = HTTP_1_0;
805 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
806 con->http.data_encoding = HTTP_ENCODING_LENGTH;
807 con->http.data_remaining = 0;
808 con->http._data_remaining = 0;
809 con->operation = HTTP_STATE_WAITING;
810 con->bytes = 0;
811 con->file = -1;
812 con->file_ready = 0;
813 con->pipe_pid = 0;
814 con->username[0] = '\0';
815 con->password[0] = '\0';
816 con->uri[0] = '\0';
817
818 cupsdClearString(&con->command);
819 cupsdClearString(&con->options);
820 cupsdClearString(&con->query_string);
821
822 if (con->request)
823 {
824 ippDelete(con->request);
825 con->request = NULL;
826 }
827
828 if (con->response)
829 {
830 ippDelete(con->response);
831 con->response = NULL;
832 }
833
834 if (con->language)
835 {
836 cupsLangFree(con->language);
837 con->language = NULL;
838 }
839
840 #ifdef HAVE_GSSAPI
841 con->have_gss = 0;
842 con->gss_uid = 0;
843 #endif /* HAVE_GSSAPI */
844
845 /*
846 * Grab the request line...
847 */
848
849 switch (sscanf(line, "%63s%1023s%63s", operation, con->uri, version))
850 {
851 case 1 :
852 if (line[0])
853 {
854 cupsdLogMessage(CUPSD_LOG_ERROR,
855 "[Client %d] Bad request line \"%s\" from %s.",
856 con->http.fd,
857 _httpEncodeURI(buf, line, sizeof(buf)),
858 con->http.hostname);
859 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
860 cupsdCloseClient(con);
861 }
862 return;
863 case 2 :
864 con->http.version = HTTP_0_9;
865 break;
866 case 3 :
867 if (sscanf(version, "HTTP/%d.%d", &major, &minor) != 2)
868 {
869 cupsdLogMessage(CUPSD_LOG_ERROR,
870 "[Client %d] Bad request line \"%s\" from %s.",
871 con->http.fd,
872 _httpEncodeURI(buf, line, sizeof(buf)),
873 con->http.hostname);
874 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
875 cupsdCloseClient(con);
876 return;
877 }
878
879 if (major < 2)
880 {
881 con->http.version = (http_version_t)(major * 100 + minor);
882 if (con->http.version == HTTP_1_1 && KeepAlive)
883 con->http.keep_alive = HTTP_KEEPALIVE_ON;
884 else
885 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
886 }
887 else
888 {
889 cupsdLogMessage(CUPSD_LOG_ERROR,
890 "[Client %d] Unsupported request line \"%s\" "
891 "from %s.", con->http.fd,
892 _httpEncodeURI(buf, line, sizeof(buf)),
893 con->http.hostname);
894 cupsdSendError(con, HTTP_NOT_SUPPORTED, CUPSD_AUTH_NONE);
895 cupsdCloseClient(con);
896 return;
897 }
898 break;
899 }
900
901 /*
902 * Handle full URLs in the request line...
903 */
904
905 if (strcmp(con->uri, "*"))
906 {
907 char scheme[HTTP_MAX_URI], /* Method/scheme */
908 userpass[HTTP_MAX_URI], /* Username:password */
909 hostname[HTTP_MAX_URI], /* Hostname */
910 resource[HTTP_MAX_URI]; /* Resource path */
911 int port; /* Port number */
912
913
914 /*
915 * Separate the URI into its components...
916 */
917
918 httpSeparateURI(HTTP_URI_CODING_MOST, con->uri,
919 scheme, sizeof(scheme),
920 userpass, sizeof(userpass),
921 hostname, sizeof(hostname), &port,
922 resource, sizeof(resource));
923
924 /*
925 * Only allow URIs with the servername, localhost, or an IP
926 * address...
927 */
928
929 if (strcmp(scheme, "file") &&
930 _cups_strcasecmp(hostname, ServerName) &&
931 _cups_strcasecmp(hostname, "localhost") &&
932 !isdigit(hostname[0]) && hostname[0] != '[')
933 {
934 /*
935 * Nope, we don't do proxies...
936 */
937
938 cupsdLogMessage(CUPSD_LOG_ERROR,
939 "[Client %d] Bad URI \"%s\" in request.",
940 con->http.fd, con->uri);
941 cupsdSendError(con, HTTP_METHOD_NOT_ALLOWED, CUPSD_AUTH_NONE);
942 cupsdCloseClient(con);
943 return;
944 }
945
946 /*
947 * Copy the resource portion back into the URI; both resource and
948 * con->uri are HTTP_MAX_URI bytes in size...
949 */
950
951 strlcpy(con->uri, resource, sizeof(con->uri));
952 }
953
954 /*
955 * Process the request...
956 */
957
958 if (!strcmp(operation, "GET"))
959 con->http.state = HTTP_STATE_GET;
960 else if (!strcmp(operation, "PUT"))
961 con->http.state = HTTP_STATE_PUT;
962 else if (!strcmp(operation, "POST"))
963 con->http.state = HTTP_STATE_POST;
964 else if (!strcmp(operation, "DELETE"))
965 con->http.state = HTTP_STATE_DELETE;
966 else if (!strcmp(operation, "TRACE"))
967 con->http.state = HTTP_STATE_TRACE;
968 else if (!strcmp(operation, "OPTIONS"))
969 con->http.state = HTTP_STATE_OPTIONS;
970 else if (!strcmp(operation, "HEAD"))
971 con->http.state = HTTP_STATE_HEAD;
972 else
973 {
974 cupsdLogMessage(CUPSD_LOG_ERROR,
975 "[Client %d] Bad operation \"%s\".", con->http.fd,
976 operation);
977 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
978 cupsdCloseClient(con);
979 return;
980 }
981
982 gettimeofday(&(con->start), NULL);
983 con->operation = con->http.state;
984
985 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] %s %s HTTP/%d.%d",
986 con->http.fd, operation, con->uri,
987 con->http.version / 100, con->http.version % 100);
988
989 con->http.status = HTTP_OK;
990
991 if (!cupsArrayFind(ActiveClients, con))
992 {
993 cupsArrayAdd(ActiveClients, con);
994 cupsdSetBusyState();
995 }
996
997 case HTTP_STATE_OPTIONS :
998 case HTTP_STATE_DELETE :
999 case HTTP_STATE_GET :
1000 case HTTP_STATE_HEAD :
1001 case HTTP_STATE_POST :
1002 case HTTP_STATE_PUT :
1003 case HTTP_STATE_TRACE :
1004 /*
1005 * Parse incoming parameters until the status changes...
1006 */
1007
1008 while ((status = httpUpdate(HTTP(con))) == HTTP_CONTINUE)
1009 if (!data_ready(con))
1010 break;
1011
1012 if (status != HTTP_OK && status != HTTP_CONTINUE)
1013 {
1014 if (con->http.error && con->http.error != EPIPE)
1015 cupsdLogMessage(CUPSD_LOG_DEBUG,
1016 "[Client %d] Closing for error %d (%s) while "
1017 "reading headers.",
1018 con->http.fd, con->http.error,
1019 strerror(con->http.error));
1020 else
1021 cupsdLogMessage(CUPSD_LOG_DEBUG,
1022 "[Client %d] Closing on EOF while reading headers.",
1023 con->http.fd);
1024
1025 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
1026 cupsdCloseClient(con);
1027 return;
1028 }
1029 break;
1030
1031 default :
1032 if (!data_ready(con) && recv(con->http.fd, buf, 1, MSG_PEEK) < 1)
1033 {
1034 /*
1035 * Connection closed...
1036 */
1037
1038 cupsdLogMessage(CUPSD_LOG_DEBUG,
1039 "[Client %d] Closing on EOF", con->http.fd);
1040 cupsdCloseClient(con);
1041 return;
1042 }
1043 break; /* Anti-compiler-warning-code */
1044 }
1045
1046 /*
1047 * Handle new transfers...
1048 */
1049
1050 if (status == HTTP_OK)
1051 {
1052 if (con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE][0])
1053 {
1054 /*
1055 * Figure out the locale from the Accept-Language and Content-Type
1056 * fields...
1057 */
1058
1059 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE],
1060 ',')) != NULL)
1061 *ptr = '\0';
1062
1063 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE],
1064 ';')) != NULL)
1065 *ptr = '\0';
1066
1067 if ((ptr = strstr(con->http.fields[HTTP_FIELD_CONTENT_TYPE],
1068 "charset=")) != NULL)
1069 {
1070 /*
1071 * Combine language and charset, and trim any extra params in the
1072 * content-type.
1073 */
1074
1075 snprintf(locale, sizeof(locale), "%s.%s",
1076 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], ptr + 8);
1077
1078 if ((ptr = strchr(locale, ',')) != NULL)
1079 *ptr = '\0';
1080 }
1081 else
1082 snprintf(locale, sizeof(locale), "%s.UTF-8",
1083 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE]);
1084
1085 con->language = cupsLangGet(locale);
1086 }
1087 else
1088 con->language = cupsLangGet(DefaultLocale);
1089
1090 cupsdAuthorize(con);
1091
1092 if (!_cups_strncasecmp(con->http.fields[HTTP_FIELD_CONNECTION],
1093 "Keep-Alive", 10) && KeepAlive)
1094 con->http.keep_alive = HTTP_KEEPALIVE_ON;
1095 else if (!_cups_strncasecmp(con->http.fields[HTTP_FIELD_CONNECTION],
1096 "close", 5))
1097 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1098
1099 if (!con->http.fields[HTTP_FIELD_HOST][0] &&
1100 con->http.version >= HTTP_1_1)
1101 {
1102 /*
1103 * HTTP/1.1 and higher require the "Host:" field...
1104 */
1105
1106 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1107 {
1108 cupsdLogMessage(CUPSD_LOG_ERROR,
1109 "[Client %d] Missing Host: field in request.",
1110 con->http.fd);
1111 cupsdCloseClient(con);
1112 return;
1113 }
1114 }
1115 else if (!valid_host(con))
1116 {
1117 /*
1118 * Access to localhost must use "localhost" or the corresponding IPv4
1119 * or IPv6 values in the Host: field.
1120 */
1121
1122 cupsdLogMessage(CUPSD_LOG_ERROR,
1123 "[Client %d] Request from \"%s\" using invalid Host: "
1124 "field \"%s\"", con->http.fd, con->http.hostname,
1125 con->http.fields[HTTP_FIELD_HOST]);
1126
1127 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1128 {
1129 cupsdCloseClient(con);
1130 return;
1131 }
1132 }
1133 else if (con->operation == HTTP_STATE_OPTIONS)
1134 {
1135 /*
1136 * Do OPTIONS command...
1137 */
1138
1139 if (con->best && con->best->type != CUPSD_AUTH_NONE)
1140 {
1141 if (!cupsdSendHeader(con, HTTP_UNAUTHORIZED, NULL, CUPSD_AUTH_NONE))
1142 {
1143 cupsdCloseClient(con);
1144 return;
1145 }
1146 }
1147
1148 if (!_cups_strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Upgrade") &&
1149 con->http.tls == NULL)
1150 {
1151 #ifdef HAVE_SSL
1152 /*
1153 * Do encryption stuff...
1154 */
1155
1156 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL, CUPSD_AUTH_NONE))
1157 {
1158 cupsdCloseClient(con);
1159 return;
1160 }
1161
1162 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1163 httpPrintf(HTTP(con), "Upgrade: TLS/1.2,TLS/1.1,TLS/1.0\r\n");
1164 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1165 httpPrintf(HTTP(con), "\r\n");
1166
1167 if (cupsdFlushHeader(con) < 0)
1168 {
1169 cupsdCloseClient(con);
1170 return;
1171 }
1172
1173 if (!cupsdStartTLS(con))
1174 {
1175 cupsdCloseClient(con);
1176 return;
1177 }
1178 #else
1179 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE))
1180 {
1181 cupsdCloseClient(con);
1182 return;
1183 }
1184 #endif /* HAVE_SSL */
1185 }
1186
1187 if (!cupsdSendHeader(con, HTTP_OK, NULL, CUPSD_AUTH_NONE))
1188 {
1189 cupsdCloseClient(con);
1190 return;
1191 }
1192
1193 httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST, PUT\r\n");
1194 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1195 httpPrintf(HTTP(con), "\r\n");
1196
1197 if (cupsdFlushHeader(con) < 0)
1198 {
1199 cupsdCloseClient(con);
1200 return;
1201 }
1202 }
1203 else if (!is_path_absolute(con->uri))
1204 {
1205 /*
1206 * Protect against malicious users!
1207 */
1208
1209 cupsdLogMessage(CUPSD_LOG_ERROR,
1210 "[Client %d] Request for non-absolute resource \"%s\".",
1211 con->http.fd, con->uri);
1212
1213 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1214 {
1215 cupsdCloseClient(con);
1216 return;
1217 }
1218 }
1219 else
1220 {
1221 if (!_cups_strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION],
1222 "Upgrade") && con->http.tls == NULL)
1223 {
1224 #ifdef HAVE_SSL
1225 /*
1226 * Do encryption stuff...
1227 */
1228
1229 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL,
1230 CUPSD_AUTH_NONE))
1231 {
1232 cupsdCloseClient(con);
1233 return;
1234 }
1235
1236 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1237 httpPrintf(HTTP(con), "Upgrade: TLS/1.2,TLS/1.1,TLS/1.0\r\n");
1238 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1239 httpPrintf(HTTP(con), "\r\n");
1240
1241 if (cupsdFlushHeader(con) < 0)
1242 {
1243 cupsdCloseClient(con);
1244 return;
1245 }
1246
1247 if (!cupsdStartTLS(con))
1248 {
1249 cupsdCloseClient(con);
1250 return;
1251 }
1252 #else
1253 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE))
1254 {
1255 cupsdCloseClient(con);
1256 return;
1257 }
1258 #endif /* HAVE_SSL */
1259 }
1260
1261 if ((status = cupsdIsAuthorized(con, NULL)) != HTTP_OK)
1262 {
1263 cupsdSendError(con, status, CUPSD_AUTH_NONE);
1264 cupsdCloseClient(con);
1265 return;
1266 }
1267
1268 if (con->http.expect &&
1269 (con->operation == HTTP_STATE_POST || con->operation == HTTP_STATE_PUT))
1270 {
1271 if (con->http.expect == HTTP_CONTINUE)
1272 {
1273 /*
1274 * Send 100-continue header...
1275 */
1276
1277 if (!cupsdSendHeader(con, HTTP_CONTINUE, NULL, CUPSD_AUTH_NONE))
1278 {
1279 cupsdCloseClient(con);
1280 return;
1281 }
1282 }
1283 else
1284 {
1285 /*
1286 * Send 417-expectation-failed header...
1287 */
1288
1289 if (!cupsdSendHeader(con, HTTP_EXPECTATION_FAILED, NULL,
1290 CUPSD_AUTH_NONE))
1291 {
1292 cupsdCloseClient(con);
1293 return;
1294 }
1295
1296 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1297 httpPrintf(HTTP(con), "\r\n");
1298
1299 if (cupsdFlushHeader(con) < 0)
1300 {
1301 cupsdCloseClient(con);
1302 return;
1303 }
1304 }
1305 }
1306
1307 switch (con->http.state)
1308 {
1309 case HTTP_STATE_GET_SEND :
1310 if ((!strncmp(con->uri, "/ppd/", 5) ||
1311 !strncmp(con->uri, "/printers/", 10) ||
1312 !strncmp(con->uri, "/classes/", 9)) &&
1313 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1314 {
1315 /*
1316 * Send PPD file - get the real printer name since printer
1317 * names are not case sensitive but filenames can be...
1318 */
1319
1320 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1321
1322 if (!strncmp(con->uri, "/ppd/", 5))
1323 p = cupsdFindPrinter(con->uri + 5);
1324 else if (!strncmp(con->uri, "/printers/", 10))
1325 p = cupsdFindPrinter(con->uri + 10);
1326 else
1327 {
1328 p = cupsdFindClass(con->uri + 9);
1329
1330 if (p)
1331 {
1332 int i; /* Looping var */
1333
1334 for (i = 0; i < p->num_printers; i ++)
1335 {
1336 if (!(p->printers[i]->type & CUPS_PRINTER_CLASS))
1337 {
1338 char ppdname[1024];/* PPD filename */
1339
1340 snprintf(ppdname, sizeof(ppdname), "%s/ppd/%s.ppd",
1341 ServerRoot, p->printers[i]->name);
1342 if (!access(ppdname, 0))
1343 {
1344 p = p->printers[i];
1345 break;
1346 }
1347 }
1348 }
1349
1350 if (i >= p->num_printers)
1351 p = NULL;
1352 }
1353 }
1354
1355 if (p)
1356 {
1357 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1358 }
1359 else
1360 {
1361 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1362 {
1363 cupsdCloseClient(con);
1364 return;
1365 }
1366
1367 break;
1368 }
1369 }
1370 else if ((!strncmp(con->uri, "/icons/", 7) ||
1371 !strncmp(con->uri, "/printers/", 10) ||
1372 !strncmp(con->uri, "/classes/", 9)) &&
1373 !strcmp(con->uri + strlen(con->uri) - 4, ".png"))
1374 {
1375 /*
1376 * Send icon file - get the real queue name since queue names are
1377 * not case sensitive but filenames can be...
1378 */
1379
1380 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".png" */
1381
1382 if (!strncmp(con->uri, "/icons/", 7))
1383 p = cupsdFindPrinter(con->uri + 7);
1384 else if (!strncmp(con->uri, "/printers/", 10))
1385 p = cupsdFindPrinter(con->uri + 10);
1386 else
1387 {
1388 p = cupsdFindClass(con->uri + 9);
1389
1390 if (p)
1391 {
1392 int i; /* Looping var */
1393
1394 for (i = 0; i < p->num_printers; i ++)
1395 {
1396 if (!(p->printers[i]->type & CUPS_PRINTER_CLASS))
1397 {
1398 char ppdname[1024];/* PPD filename */
1399
1400 snprintf(ppdname, sizeof(ppdname), "%s/ppd/%s.ppd",
1401 ServerRoot, p->printers[i]->name);
1402 if (!access(ppdname, 0))
1403 {
1404 p = p->printers[i];
1405 break;
1406 }
1407 }
1408 }
1409
1410 if (i >= p->num_printers)
1411 p = NULL;
1412 }
1413 }
1414
1415 if (p)
1416 snprintf(con->uri, sizeof(con->uri), "/icons/%s.png", p->name);
1417 else
1418 {
1419 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1420 {
1421 cupsdCloseClient(con);
1422 return;
1423 }
1424
1425 break;
1426 }
1427 }
1428 else if (!WebInterface)
1429 {
1430 /*
1431 * Web interface is disabled. Show an appropriate message...
1432 */
1433
1434 if (!cupsdSendError(con, HTTP_WEBIF_DISABLED, CUPSD_AUTH_NONE))
1435 {
1436 cupsdCloseClient(con);
1437 return;
1438 }
1439
1440 break;
1441 }
1442
1443 if ((!strncmp(con->uri, "/admin", 6) &&
1444 strncmp(con->uri, "/admin/conf/", 12) &&
1445 strncmp(con->uri, "/admin/log/", 11)) ||
1446 !strncmp(con->uri, "/printers", 9) ||
1447 !strncmp(con->uri, "/classes", 8) ||
1448 !strncmp(con->uri, "/help", 5) ||
1449 !strncmp(con->uri, "/jobs", 5))
1450 {
1451 /*
1452 * Send CGI output...
1453 */
1454
1455 if (!strncmp(con->uri, "/admin", 6))
1456 {
1457 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1458 ServerBin);
1459
1460 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1461 }
1462 else if (!strncmp(con->uri, "/printers", 9))
1463 {
1464 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1465 ServerBin);
1466
1467 if (con->uri[9] && con->uri[10])
1468 cupsdSetString(&con->options, con->uri + 9);
1469 else
1470 cupsdSetString(&con->options, NULL);
1471 }
1472 else if (!strncmp(con->uri, "/classes", 8))
1473 {
1474 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1475 ServerBin);
1476
1477 if (con->uri[8] && con->uri[9])
1478 cupsdSetString(&con->options, con->uri + 8);
1479 else
1480 cupsdSetString(&con->options, NULL);
1481 }
1482 else if (!strncmp(con->uri, "/jobs", 5))
1483 {
1484 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1485 ServerBin);
1486
1487 if (con->uri[5] && con->uri[6])
1488 cupsdSetString(&con->options, con->uri + 5);
1489 else
1490 cupsdSetString(&con->options, NULL);
1491 }
1492 else
1493 {
1494 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1495 ServerBin);
1496
1497 if (con->uri[5] && con->uri[6])
1498 cupsdSetString(&con->options, con->uri + 5);
1499 else
1500 cupsdSetString(&con->options, NULL);
1501 }
1502
1503 if (!cupsdSendCommand(con, con->command, con->options, 0))
1504 {
1505 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1506 {
1507 cupsdCloseClient(con);
1508 return;
1509 }
1510 }
1511 else
1512 cupsdLogRequest(con, HTTP_OK);
1513
1514 if (con->http.version <= HTTP_1_0)
1515 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1516 }
1517 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1518 (strchr(con->uri + 12, '/') ||
1519 strlen(con->uri) == 12)) ||
1520 (!strncmp(con->uri, "/admin/log/", 11) &&
1521 (strchr(con->uri + 11, '/') ||
1522 strlen(con->uri) == 11)))
1523 {
1524 /*
1525 * GET can only be done to configuration files directly under
1526 * /admin/conf...
1527 */
1528
1529 cupsdLogMessage(CUPSD_LOG_ERROR,
1530 "Request for subdirectory \"%s\"!", con->uri);
1531
1532 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1533 {
1534 cupsdCloseClient(con);
1535 return;
1536 }
1537
1538 break;
1539 }
1540 else
1541 {
1542 /*
1543 * Serve a file...
1544 */
1545
1546 if ((filename = get_file(con, &filestats, buf,
1547 sizeof(buf))) == NULL)
1548 {
1549 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1550 {
1551 cupsdCloseClient(con);
1552 return;
1553 }
1554
1555 break;
1556 }
1557
1558 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1559
1560 if (is_cgi(con, filename, &filestats, type))
1561 {
1562 /*
1563 * Note: con->command and con->options were set by
1564 * is_cgi()...
1565 */
1566
1567 if (!cupsdSendCommand(con, con->command, con->options, 0))
1568 {
1569 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1570 {
1571 cupsdCloseClient(con);
1572 return;
1573 }
1574 }
1575 else
1576 cupsdLogRequest(con, HTTP_OK);
1577
1578 if (con->http.version <= HTTP_1_0)
1579 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1580 break;
1581 }
1582
1583 if (!check_if_modified(con, &filestats))
1584 {
1585 if (!cupsdSendError(con, HTTP_NOT_MODIFIED, CUPSD_AUTH_NONE))
1586 {
1587 cupsdCloseClient(con);
1588 return;
1589 }
1590 }
1591 else
1592 {
1593 if (type == NULL)
1594 strlcpy(line, "text/plain", sizeof(line));
1595 else
1596 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1597
1598 if (!write_file(con, HTTP_OK, filename, line, &filestats))
1599 {
1600 cupsdCloseClient(con);
1601 return;
1602 }
1603 }
1604 }
1605 break;
1606
1607 case HTTP_STATE_POST_RECV :
1608 /*
1609 * See if the POST request includes a Content-Length field, and if
1610 * so check the length against any limits that are set...
1611 */
1612
1613 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1614 MaxRequestSize > 0 &&
1615 con->http.data_remaining > MaxRequestSize)
1616 {
1617 /*
1618 * Request too large...
1619 */
1620
1621 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1622 {
1623 cupsdCloseClient(con);
1624 return;
1625 }
1626
1627 break;
1628 }
1629 else if (con->http.data_remaining < 0 ||
1630 (!con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1631 con->http.data_encoding == HTTP_ENCODING_LENGTH))
1632 {
1633 /*
1634 * Negative content lengths are invalid!
1635 */
1636
1637 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1638 {
1639 cupsdCloseClient(con);
1640 return;
1641 }
1642
1643 break;
1644 }
1645
1646 /*
1647 * See what kind of POST request this is; for IPP requests the
1648 * content-type field will be "application/ipp"...
1649 */
1650
1651 if (!strcmp(con->http.fields[HTTP_FIELD_CONTENT_TYPE],
1652 "application/ipp"))
1653 con->request = ippNew();
1654 else if (!WebInterface)
1655 {
1656 /*
1657 * Web interface is disabled. Show an appropriate message...
1658 */
1659
1660 if (!cupsdSendError(con, HTTP_WEBIF_DISABLED, CUPSD_AUTH_NONE))
1661 {
1662 cupsdCloseClient(con);
1663 return;
1664 }
1665
1666 break;
1667 }
1668 else if ((!strncmp(con->uri, "/admin", 6) &&
1669 strncmp(con->uri, "/admin/conf/", 12) &&
1670 strncmp(con->uri, "/admin/log/", 11)) ||
1671 !strncmp(con->uri, "/printers", 9) ||
1672 !strncmp(con->uri, "/classes", 8) ||
1673 !strncmp(con->uri, "/help", 5) ||
1674 !strncmp(con->uri, "/jobs", 5))
1675 {
1676 /*
1677 * CGI request...
1678 */
1679
1680 if (!strncmp(con->uri, "/admin", 6))
1681 {
1682 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1683 ServerBin);
1684
1685 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1686 }
1687 else if (!strncmp(con->uri, "/printers", 9))
1688 {
1689 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1690 ServerBin);
1691
1692 if (con->uri[9] && con->uri[10])
1693 cupsdSetString(&con->options, con->uri + 9);
1694 else
1695 cupsdSetString(&con->options, NULL);
1696 }
1697 else if (!strncmp(con->uri, "/classes", 8))
1698 {
1699 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1700 ServerBin);
1701
1702 if (con->uri[8] && con->uri[9])
1703 cupsdSetString(&con->options, con->uri + 8);
1704 else
1705 cupsdSetString(&con->options, NULL);
1706 }
1707 else if (!strncmp(con->uri, "/jobs", 5))
1708 {
1709 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1710 ServerBin);
1711
1712 if (con->uri[5] && con->uri[6])
1713 cupsdSetString(&con->options, con->uri + 5);
1714 else
1715 cupsdSetString(&con->options, NULL);
1716 }
1717 else
1718 {
1719 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1720 ServerBin);
1721
1722 if (con->uri[5] && con->uri[6])
1723 cupsdSetString(&con->options, con->uri + 5);
1724 else
1725 cupsdSetString(&con->options, NULL);
1726 }
1727
1728 if (con->http.version <= HTTP_1_0)
1729 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1730 }
1731 else
1732 {
1733 /*
1734 * POST to a file...
1735 */
1736
1737 if ((filename = get_file(con, &filestats, buf,
1738 sizeof(buf))) == NULL)
1739 {
1740 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1741 {
1742 cupsdCloseClient(con);
1743 return;
1744 }
1745
1746 break;
1747 }
1748
1749 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1750
1751 if (!is_cgi(con, filename, &filestats, type))
1752 {
1753 /*
1754 * Only POST to CGI's...
1755 */
1756
1757 if (!cupsdSendError(con, HTTP_UNAUTHORIZED, CUPSD_AUTH_NONE))
1758 {
1759 cupsdCloseClient(con);
1760 return;
1761 }
1762 }
1763 }
1764 break;
1765
1766 case HTTP_STATE_PUT_RECV :
1767 /*
1768 * Validate the resource name...
1769 */
1770
1771 if (strcmp(con->uri, "/admin/conf/cupsd.conf"))
1772 {
1773 /*
1774 * PUT can only be done to the cupsd.conf file...
1775 */
1776
1777 cupsdLogMessage(CUPSD_LOG_ERROR,
1778 "[Client %d] Disallowed PUT request for \"%s\".",
1779 con->http.fd, con->uri);
1780
1781 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1782 {
1783 cupsdCloseClient(con);
1784 return;
1785 }
1786
1787 break;
1788 }
1789
1790 /*
1791 * See if the PUT request includes a Content-Length field, and if
1792 * so check the length against any limits that are set...
1793 */
1794
1795 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1796 MaxRequestSize > 0 &&
1797 con->http.data_remaining > MaxRequestSize)
1798 {
1799 /*
1800 * Request too large...
1801 */
1802
1803 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1804 {
1805 cupsdCloseClient(con);
1806 return;
1807 }
1808
1809 break;
1810 }
1811 else if (con->http.data_remaining < 0)
1812 {
1813 /*
1814 * Negative content lengths are invalid!
1815 */
1816
1817 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1818 {
1819 cupsdCloseClient(con);
1820 return;
1821 }
1822
1823 break;
1824 }
1825
1826 /*
1827 * Open a temporary file to hold the request...
1828 */
1829
1830 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot,
1831 request_id ++);
1832 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
1833
1834 if (con->file < 0)
1835 {
1836 cupsdLogMessage(CUPSD_LOG_ERROR,
1837 "[Client %d] Unable to create request file "
1838 "\"%s\": %s", con->http.fd, con->filename,
1839 strerror(errno));
1840
1841 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1842 {
1843 cupsdCloseClient(con);
1844 return;
1845 }
1846 }
1847
1848 fchmod(con->file, 0640);
1849 fchown(con->file, RunUser, Group);
1850 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
1851 break;
1852
1853 case HTTP_STATE_DELETE :
1854 case HTTP_STATE_TRACE :
1855 cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE);
1856 cupsdCloseClient(con);
1857 return;
1858
1859 case HTTP_STATE_HEAD :
1860 if (!strncmp(con->uri, "/printers/", 10) &&
1861 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1862 {
1863 /*
1864 * Send PPD file - get the real printer name since printer
1865 * names are not case sensitive but filenames can be...
1866 */
1867
1868 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1869
1870 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1871 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1872 else
1873 {
1874 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1875 {
1876 cupsdCloseClient(con);
1877 return;
1878 }
1879
1880 break;
1881 }
1882 }
1883 else if (!strncmp(con->uri, "/printers/", 10) &&
1884 !strcmp(con->uri + strlen(con->uri) - 4, ".png"))
1885 {
1886 /*
1887 * Send PNG file - get the real printer name since printer
1888 * names are not case sensitive but filenames can be...
1889 */
1890
1891 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1892
1893 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1894 snprintf(con->uri, sizeof(con->uri), "/icons/%s.png", p->name);
1895 else
1896 {
1897 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1898 {
1899 cupsdCloseClient(con);
1900 return;
1901 }
1902
1903 break;
1904 }
1905 }
1906 else if (!WebInterface)
1907 {
1908 if (!cupsdSendHeader(con, HTTP_OK, line, CUPSD_AUTH_NONE))
1909 {
1910 cupsdCloseClient(con);
1911 return;
1912 }
1913
1914 if (httpPrintf(HTTP(con), "\r\n") < 0)
1915 {
1916 cupsdCloseClient(con);
1917 return;
1918 }
1919
1920 if (cupsdFlushHeader(con) < 0)
1921 {
1922 cupsdCloseClient(con);
1923 return;
1924 }
1925
1926 con->http.state = HTTP_STATE_WAITING;
1927 DEBUG_puts("cupsdReadClient: Set state to HTTP_STATE_WAITING "
1928 "after HEAD.");
1929 break;
1930 }
1931
1932 if ((!strncmp(con->uri, "/admin", 6) &&
1933 strncmp(con->uri, "/admin/conf/", 12) &&
1934 strncmp(con->uri, "/admin/log/", 11)) ||
1935 !strncmp(con->uri, "/printers", 9) ||
1936 !strncmp(con->uri, "/classes", 8) ||
1937 !strncmp(con->uri, "/help", 5) ||
1938 !strncmp(con->uri, "/jobs", 5))
1939 {
1940 /*
1941 * CGI output...
1942 */
1943
1944 if (!cupsdSendHeader(con, HTTP_OK, "text/html", CUPSD_AUTH_NONE))
1945 {
1946 cupsdCloseClient(con);
1947 return;
1948 }
1949
1950 if (httpPrintf(HTTP(con), "\r\n") < 0)
1951 {
1952 cupsdCloseClient(con);
1953 return;
1954 }
1955
1956 if (cupsdFlushHeader(con) < 0)
1957 {
1958 cupsdCloseClient(con);
1959 return;
1960 }
1961
1962 cupsdLogRequest(con, HTTP_OK);
1963 }
1964 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1965 (strchr(con->uri + 12, '/') ||
1966 strlen(con->uri) == 12)) ||
1967 (!strncmp(con->uri, "/admin/log/", 11) &&
1968 (strchr(con->uri + 11, '/') ||
1969 strlen(con->uri) == 11)))
1970 {
1971 /*
1972 * HEAD can only be done to configuration files under
1973 * /admin/conf...
1974 */
1975
1976 cupsdLogMessage(CUPSD_LOG_ERROR,
1977 "[Client %d] Request for subdirectory \"%s\".",
1978 con->http.fd, con->uri);
1979
1980 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1981 {
1982 cupsdCloseClient(con);
1983 return;
1984 }
1985
1986 break;
1987 }
1988 else if ((filename = get_file(con, &filestats, buf,
1989 sizeof(buf))) == NULL)
1990 {
1991 if (!cupsdSendHeader(con, HTTP_NOT_FOUND, "text/html",
1992 CUPSD_AUTH_NONE))
1993 {
1994 cupsdCloseClient(con);
1995 return;
1996 }
1997
1998 cupsdLogRequest(con, HTTP_NOT_FOUND);
1999 }
2000 else if (!check_if_modified(con, &filestats))
2001 {
2002 if (!cupsdSendError(con, HTTP_NOT_MODIFIED, CUPSD_AUTH_NONE))
2003 {
2004 cupsdCloseClient(con);
2005 return;
2006 }
2007
2008 cupsdLogRequest(con, HTTP_NOT_MODIFIED);
2009 }
2010 else
2011 {
2012 /*
2013 * Serve a file...
2014 */
2015
2016 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
2017 if (type == NULL)
2018 strlcpy(line, "text/plain", sizeof(line));
2019 else
2020 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
2021
2022 if (!cupsdSendHeader(con, HTTP_OK, line, CUPSD_AUTH_NONE))
2023 {
2024 cupsdCloseClient(con);
2025 return;
2026 }
2027
2028 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
2029 httpGetDateString(filestats.st_mtime)) < 0)
2030 {
2031 cupsdCloseClient(con);
2032 return;
2033 }
2034
2035 if (httpPrintf(HTTP(con), "Content-Length: %lu\r\n",
2036 (unsigned long)filestats.st_size) < 0)
2037 {
2038 cupsdCloseClient(con);
2039 return;
2040 }
2041
2042 cupsdLogRequest(con, HTTP_OK);
2043 }
2044
2045 if (httpPrintf(HTTP(con), "\r\n") < 0)
2046 {
2047 cupsdCloseClient(con);
2048 return;
2049 }
2050
2051 if (cupsdFlushHeader(con) < 0)
2052 {
2053 cupsdCloseClient(con);
2054 return;
2055 }
2056
2057 con->http.state = HTTP_STATE_WAITING;
2058 DEBUG_puts("cupsdReadClient: Set state to HTTP_STATE_WAITING "
2059 "after HEAD.");
2060 break;
2061
2062 default :
2063 break; /* Anti-compiler-warning-code */
2064 }
2065 }
2066 }
2067
2068 /*
2069 * Handle any incoming data...
2070 */
2071
2072 switch (con->http.state)
2073 {
2074 case HTTP_STATE_PUT_RECV :
2075 do
2076 {
2077 if ((bytes = httpRead2(HTTP(con), line, sizeof(line))) < 0)
2078 {
2079 if (con->http.error && con->http.error != EPIPE)
2080 cupsdLogMessage(CUPSD_LOG_DEBUG,
2081 "[Client %d] HTTP_STATE_PUT_RECV Closing for error "
2082 "%d (%s)", con->http.fd, con->http.error,
2083 strerror(con->http.error));
2084 else
2085 cupsdLogMessage(CUPSD_LOG_DEBUG,
2086 "[Client %d] HTTP_STATE_PUT_RECV Closing on EOF",
2087 con->http.fd);
2088
2089 cupsdCloseClient(con);
2090 return;
2091 }
2092 else if (bytes > 0)
2093 {
2094 con->bytes += bytes;
2095
2096 if (write(con->file, line, bytes) < bytes)
2097 {
2098 cupsdLogMessage(CUPSD_LOG_ERROR,
2099 "[Client %d] Unable to write %d bytes to "
2100 "\"%s\": %s", con->http.fd, bytes, con->filename,
2101 strerror(errno));
2102
2103 close(con->file);
2104 con->file = -1;
2105 unlink(con->filename);
2106 cupsdClearString(&con->filename);
2107
2108 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2109 {
2110 cupsdCloseClient(con);
2111 return;
2112 }
2113 }
2114 }
2115 }
2116 while (con->http.state == HTTP_STATE_PUT_RECV && data_ready(con));
2117
2118 if (con->http.state == HTTP_STATE_STATUS)
2119 {
2120 /*
2121 * End of file, see how big it is...
2122 */
2123
2124 fstat(con->file, &filestats);
2125
2126 close(con->file);
2127 con->file = -1;
2128
2129 if (filestats.st_size > MaxRequestSize &&
2130 MaxRequestSize > 0)
2131 {
2132 /*
2133 * Request is too big; remove it and send an error...
2134 */
2135
2136 unlink(con->filename);
2137 cupsdClearString(&con->filename);
2138
2139 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2140 {
2141 cupsdCloseClient(con);
2142 return;
2143 }
2144 }
2145
2146 /*
2147 * Install the configuration file...
2148 */
2149
2150 status = install_cupsd_conf(con);
2151
2152 /*
2153 * Return the status to the client...
2154 */
2155
2156 if (!cupsdSendError(con, status, CUPSD_AUTH_NONE))
2157 {
2158 cupsdCloseClient(con);
2159 return;
2160 }
2161 }
2162 break;
2163
2164 case HTTP_STATE_POST_RECV :
2165 do
2166 {
2167 if (con->request && con->file < 0)
2168 {
2169 /*
2170 * Grab any request data from the connection...
2171 */
2172
2173 if ((ipp_state = ippRead(&(con->http), con->request)) == IPP_ERROR)
2174 {
2175 cupsdLogMessage(CUPSD_LOG_ERROR,
2176 "[Client %d] IPP read error: %s", con->http.fd,
2177 cupsLastErrorString());
2178
2179 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
2180 cupsdCloseClient(con);
2181 return;
2182 }
2183 else if (ipp_state != IPP_DATA)
2184 {
2185 if (con->http.state == HTTP_STATE_POST_SEND)
2186 {
2187 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
2188 cupsdCloseClient(con);
2189 return;
2190 }
2191
2192 if (data_ready(con))
2193 continue;
2194 break;
2195 }
2196 else
2197 {
2198 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] %d.%d %s %d",
2199 con->http.fd, con->request->request.op.version[0],
2200 con->request->request.op.version[1],
2201 ippOpString(con->request->request.op.operation_id),
2202 con->request->request.op.request_id);
2203 con->bytes += ippLength(con->request);
2204 }
2205 }
2206
2207 if (con->file < 0 && con->http.state != HTTP_STATE_POST_SEND)
2208 {
2209 /*
2210 * Create a file as needed for the request data...
2211 */
2212
2213 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot,
2214 request_id ++);
2215 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
2216
2217 if (con->file < 0)
2218 {
2219 cupsdLogMessage(CUPSD_LOG_ERROR,
2220 "[Client %d] Unable to create request file "
2221 "\"%s\": %s", con->http.fd, con->filename,
2222 strerror(errno));
2223
2224 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2225 {
2226 cupsdCloseClient(con);
2227 return;
2228 }
2229 }
2230
2231 fchmod(con->file, 0640);
2232 fchown(con->file, RunUser, Group);
2233 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2234 }
2235
2236 if (con->http.state != HTTP_STATE_POST_SEND)
2237 {
2238 if (!httpWait(HTTP(con), 0))
2239 return;
2240 else if ((bytes = httpRead2(HTTP(con), line, sizeof(line))) < 0)
2241 {
2242 if (con->http.error && con->http.error != EPIPE)
2243 cupsdLogMessage(CUPSD_LOG_DEBUG,
2244 "[Client %d] HTTP_STATE_POST_SEND Closing for "
2245 "error %d (%s)", con->http.fd, con->http.error,
2246 strerror(con->http.error));
2247 else
2248 cupsdLogMessage(CUPSD_LOG_DEBUG,
2249 "[Client %d] HTTP_STATE_POST_SEND Closing on EOF",
2250 con->http.fd);
2251
2252 cupsdCloseClient(con);
2253 return;
2254 }
2255 else if (bytes > 0)
2256 {
2257 con->bytes += bytes;
2258
2259 if (write(con->file, line, bytes) < bytes)
2260 {
2261 cupsdLogMessage(CUPSD_LOG_ERROR,
2262 "[Client %d] Unable to write %d bytes to "
2263 "\"%s\": %s", con->http.fd, bytes,
2264 con->filename, strerror(errno));
2265
2266 close(con->file);
2267 con->file = -1;
2268 unlink(con->filename);
2269 cupsdClearString(&con->filename);
2270
2271 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE,
2272 CUPSD_AUTH_NONE))
2273 {
2274 cupsdCloseClient(con);
2275 return;
2276 }
2277 }
2278 }
2279 else if (con->http.state == HTTP_STATE_POST_RECV)
2280 return;
2281 else if (con->http.state != HTTP_STATE_POST_SEND)
2282 {
2283 cupsdLogMessage(CUPSD_LOG_DEBUG,
2284 "[Client %d] Closing on unexpected state %s.",
2285 con->http.fd, http_states[con->http.state + 1]);
2286 cupsdCloseClient(con);
2287 return;
2288 }
2289 }
2290 }
2291 while (con->http.state == HTTP_STATE_POST_RECV && data_ready(con));
2292
2293 if (con->http.state == HTTP_STATE_POST_SEND)
2294 {
2295 if (con->file >= 0)
2296 {
2297 fstat(con->file, &filestats);
2298
2299 close(con->file);
2300 con->file = -1;
2301
2302 if (filestats.st_size > MaxRequestSize &&
2303 MaxRequestSize > 0)
2304 {
2305 /*
2306 * Request is too big; remove it and send an error...
2307 */
2308
2309 unlink(con->filename);
2310 cupsdClearString(&con->filename);
2311
2312 if (con->request)
2313 {
2314 /*
2315 * Delete any IPP request data...
2316 */
2317
2318 ippDelete(con->request);
2319 con->request = NULL;
2320 }
2321
2322 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2323 {
2324 cupsdCloseClient(con);
2325 return;
2326 }
2327 }
2328 else if (filestats.st_size == 0)
2329 {
2330 /*
2331 * Don't allow empty file...
2332 */
2333
2334 unlink(con->filename);
2335 cupsdClearString(&con->filename);
2336 }
2337
2338 if (con->command)
2339 {
2340 if (!cupsdSendCommand(con, con->command, con->options, 0))
2341 {
2342 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
2343 {
2344 cupsdCloseClient(con);
2345 return;
2346 }
2347 }
2348 else
2349 cupsdLogRequest(con, HTTP_OK);
2350 }
2351 }
2352
2353 if (con->request)
2354 {
2355 cupsdProcessIPPRequest(con);
2356
2357 if (con->filename)
2358 {
2359 unlink(con->filename);
2360 cupsdClearString(&con->filename);
2361 }
2362
2363 return;
2364 }
2365 }
2366 break;
2367
2368 default :
2369 break; /* Anti-compiler-warning-code */
2370 }
2371
2372 if (con->http.state == HTTP_STATE_WAITING)
2373 {
2374 if (!con->http.keep_alive)
2375 {
2376 cupsdLogMessage(CUPSD_LOG_DEBUG,
2377 "[Client %d] Closing because Keep-Alive disabled",
2378 con->http.fd);
2379 cupsdCloseClient(con);
2380 }
2381 else
2382 {
2383 cupsArrayRemove(ActiveClients, con);
2384 cupsdSetBusyState();
2385 }
2386 }
2387 }
2388
2389
2390 /*
2391 * 'cupsdSendCommand()' - Send output from a command via HTTP.
2392 */
2393
2394 int /* O - 1 on success, 0 on failure */
2395 cupsdSendCommand(
2396 cupsd_client_t *con, /* I - Client connection */
2397 char *command, /* I - Command to run */
2398 char *options, /* I - Command-line options */
2399 int root) /* I - Run as root? */
2400 {
2401 int fd; /* Standard input file descriptor */
2402
2403
2404 if (con->filename)
2405 {
2406 fd = open(con->filename, O_RDONLY);
2407
2408 if (fd < 0)
2409 {
2410 cupsdLogMessage(CUPSD_LOG_ERROR,
2411 "[Client %d] Unable to open \"%s\" for reading: %s",
2412 con->http.fd, con->filename ? con->filename : "/dev/null",
2413 strerror(errno));
2414 return (0);
2415 }
2416
2417 fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
2418 }
2419 else
2420 fd = -1;
2421
2422 con->pipe_pid = pipe_command(con, fd, &(con->file), command, options, root);
2423
2424 if (fd >= 0)
2425 close(fd);
2426
2427 cupsdLogMessage(CUPSD_LOG_INFO, "[Client %d] Started \"%s\" (pid=%d)",
2428 con->http.fd, command, con->pipe_pid);
2429
2430 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] file=%d", con->http.fd,
2431 con->file);
2432
2433 if (con->pipe_pid == 0)
2434 return (0);
2435
2436 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2437
2438 cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con);
2439
2440 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] Waiting for CGI data.",
2441 con->http.fd);
2442
2443 con->sent_header = 0;
2444 con->file_ready = 0;
2445 con->got_fields = 0;
2446 con->header_used = 0;
2447
2448 return (1);
2449 }
2450
2451
2452 /*
2453 * 'cupsdSendError()' - Send an error message via HTTP.
2454 */
2455
2456 int /* O - 1 if successful, 0 otherwise */
2457 cupsdSendError(cupsd_client_t *con, /* I - Connection */
2458 http_status_t code, /* I - Error code */
2459 int auth_type)/* I - Authentication type */
2460 {
2461 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2462 "[Client %d] cupsdSendError code=%d, auth_type=%d",
2463 con->http.fd, code, auth_type);
2464
2465 #ifdef HAVE_SSL
2466 /*
2467 * Force client to upgrade for authentication if that is how the
2468 * server is configured...
2469 */
2470
2471 if (code == HTTP_UNAUTHORIZED &&
2472 DefaultEncryption == HTTP_ENCRYPT_REQUIRED &&
2473 _cups_strcasecmp(con->http.hostname, "localhost") &&
2474 !con->http.tls)
2475 {
2476 code = HTTP_UPGRADE_REQUIRED;
2477 }
2478 #endif /* HAVE_SSL */
2479
2480 /*
2481 * Put the request in the access_log file...
2482 */
2483
2484 cupsdLogRequest(con, code);
2485
2486 /*
2487 * To work around bugs in some proxies, don't use Keep-Alive for some
2488 * error messages...
2489 *
2490 * Kerberos authentication doesn't work without Keep-Alive, so
2491 * never disable it in that case.
2492 */
2493
2494 if (code >= HTTP_BAD_REQUEST && con->http.auth_type != CUPSD_AUTH_NEGOTIATE)
2495 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
2496
2497 /*
2498 * Send an error message back to the client. If the error code is a
2499 * 400 or 500 series, make sure the message contains some text, too!
2500 */
2501
2502 if (!cupsdSendHeader(con, code, NULL, auth_type))
2503 return (0);
2504
2505 #ifdef HAVE_SSL
2506 if (code == HTTP_UPGRADE_REQUIRED)
2507 if (httpPrintf(HTTP(con), "Connection: Upgrade\r\n") < 0)
2508 return (0);
2509
2510 if (httpPrintf(HTTP(con), "Upgrade: TLS/1.2,TLS/1.1,TLS/1.0\r\n") < 0)
2511 return (0);
2512 #endif /* HAVE_SSL */
2513
2514 if (con->http.version >= HTTP_1_1 &&
2515 con->http.keep_alive == HTTP_KEEPALIVE_OFF)
2516 {
2517 if (httpPrintf(HTTP(con), "Connection: close\r\n") < 0)
2518 return (0);
2519 }
2520
2521 if (code >= HTTP_BAD_REQUEST)
2522 {
2523 /*
2524 * Send a human-readable error message.
2525 */
2526
2527 char message[4096], /* Message for user */
2528 urltext[1024], /* URL redirection text */
2529 redirect[1024]; /* Redirection link */
2530 const char *text; /* Status-specific text */
2531
2532
2533 redirect[0] = '\0';
2534
2535 if (code == HTTP_UNAUTHORIZED)
2536 text = _cupsLangString(con->language,
2537 _("Enter your username and password or the "
2538 "root username and password to access this "
2539 "page. If you are using Kerberos authentication, "
2540 "make sure you have a valid Kerberos ticket."));
2541 else if (code == HTTP_UPGRADE_REQUIRED)
2542 {
2543 text = urltext;
2544
2545 snprintf(urltext, sizeof(urltext),
2546 _cupsLangString(con->language,
2547 _("You must access this page using the URL "
2548 "<A HREF=\"https://%s:%d%s\">"
2549 "https://%s:%d%s</A>.")),
2550 con->servername, con->serverport, con->uri,
2551 con->servername, con->serverport, con->uri);
2552
2553 snprintf(redirect, sizeof(redirect),
2554 "<META HTTP-EQUIV=\"Refresh\" "
2555 "CONTENT=\"3;URL=https://%s:%d%s\">\n",
2556 con->servername, con->serverport, con->uri);
2557 }
2558 else if (code == HTTP_WEBIF_DISABLED)
2559 text = _cupsLangString(con->language,
2560 _("The web interface is currently disabled. Run "
2561 "\"cupsctl WebInterface=yes\" to enable it."));
2562 else
2563 text = "";
2564
2565 snprintf(message, sizeof(message),
2566 "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" "
2567 "\"http://www.w3.org/TR/html4/loose.dtd\">\n"
2568 "<HTML>\n"
2569 "<HEAD>\n"
2570 "\t<META HTTP-EQUIV=\"Content-Type\" "
2571 "CONTENT=\"text/html; charset=utf-8\">\n"
2572 "\t<TITLE>%s - " CUPS_SVERSION "</TITLE>\n"
2573 "\t<LINK REL=\"STYLESHEET\" TYPE=\"text/css\" "
2574 "HREF=\"/cups.css\">\n"
2575 "%s"
2576 "</HEAD>\n"
2577 "<BODY>\n"
2578 "<H1>%s</H1>\n"
2579 "<P>%s</P>\n"
2580 "</BODY>\n"
2581 "</HTML>\n",
2582 _httpStatus(con->language, code), redirect,
2583 _httpStatus(con->language, code), text);
2584
2585 if (httpPrintf(HTTP(con), "Content-Type: text/html; charset=utf-8\r\n") < 0)
2586 return (0);
2587 if (httpPrintf(HTTP(con), "Content-Length: %d\r\n",
2588 (int)strlen(message)) < 0)
2589 return (0);
2590 if (httpPrintf(HTTP(con), "\r\n") < 0)
2591 return (0);
2592 if (httpPrintf(HTTP(con), "%s", message) < 0)
2593 return (0);
2594 }
2595 else if (httpPrintf(HTTP(con), "\r\n") < 0)
2596 return (0);
2597
2598 if (cupsdFlushHeader(con) < 0)
2599 return (0);
2600
2601 con->http.state = HTTP_STATE_WAITING;
2602
2603 DEBUG_puts("cupsdSendError: Set state to HTTP_STATE_WAITING.");
2604
2605 return (1);
2606 }
2607
2608
2609 /*
2610 * 'cupsdSendHeader()' - Send an HTTP request.
2611 */
2612
2613 int /* O - 1 on success, 0 on failure */
2614 cupsdSendHeader(
2615 cupsd_client_t *con, /* I - Client to send to */
2616 http_status_t code, /* I - HTTP status code */
2617 char *type, /* I - MIME type of document */
2618 int auth_type) /* I - Type of authentication */
2619 {
2620 char auth_str[1024]; /* Authorization string */
2621
2622
2623 /*
2624 * Send the HTTP status header...
2625 */
2626
2627 if (code == HTTP_CONTINUE)
2628 {
2629 /*
2630 * 100-continue doesn't send any headers...
2631 */
2632
2633 return (httpPrintf(HTTP(con), "HTTP/%d.%d 100 Continue\r\n\r\n",
2634 con->http.version / 100, con->http.version % 100) > 0);
2635 }
2636 else if (code == HTTP_WEBIF_DISABLED)
2637 {
2638 /*
2639 * Treat our special "web interface is disabled" status as "200 OK" for web
2640 * browsers.
2641 */
2642
2643 code = HTTP_OK;
2644 }
2645
2646 httpFlushWrite(HTTP(con));
2647
2648 con->http.data_encoding = HTTP_ENCODING_FIELDS;
2649
2650 if (httpPrintf(HTTP(con), "HTTP/%d.%d %d %s\r\n", con->http.version / 100,
2651 con->http.version % 100, code, httpStatus(code)) < 0)
2652 return (0);
2653 if (httpPrintf(HTTP(con), "Date: %s\r\n", httpGetDateString(time(NULL))) < 0)
2654 return (0);
2655 if (ServerHeader)
2656 if (httpPrintf(HTTP(con), "Server: %s\r\n", ServerHeader) < 0)
2657 return (0);
2658 if (con->http.keep_alive && con->http.version >= HTTP_1_0)
2659 {
2660 if (httpPrintf(HTTP(con), "Connection: Keep-Alive\r\n") < 0)
2661 return (0);
2662 if (httpPrintf(HTTP(con), "Keep-Alive: timeout=%d\r\n",
2663 KeepAliveTimeout) < 0)
2664 return (0);
2665 }
2666 if (code == HTTP_METHOD_NOT_ALLOWED)
2667 if (httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST, PUT\r\n") < 0)
2668 return (0);
2669
2670 if (code == HTTP_UNAUTHORIZED)
2671 {
2672 if (auth_type == CUPSD_AUTH_NONE)
2673 {
2674 if (!con->best || con->best->type <= CUPSD_AUTH_NONE)
2675 auth_type = cupsdDefaultAuthType();
2676 else
2677 auth_type = con->best->type;
2678 }
2679
2680 auth_str[0] = '\0';
2681
2682 if (auth_type == CUPSD_AUTH_BASIC || auth_type == CUPSD_AUTH_BASICDIGEST)
2683 strlcpy(auth_str, "Basic realm=\"CUPS\"", sizeof(auth_str));
2684 else if (auth_type == CUPSD_AUTH_DIGEST)
2685 snprintf(auth_str, sizeof(auth_str), "Digest realm=\"CUPS\", nonce=\"%s\"",
2686 con->http.hostname);
2687 #ifdef HAVE_GSSAPI
2688 else if (auth_type == CUPSD_AUTH_NEGOTIATE)
2689 {
2690 # ifdef AF_LOCAL
2691 if (_httpAddrFamily(con->http.hostaddr) == AF_LOCAL)
2692 strlcpy(auth_str, "Basic realm=\"CUPS\"", sizeof(auth_str));
2693 else
2694 # endif /* AF_LOCAL */
2695 strlcpy(auth_str, "Negotiate", sizeof(auth_str));
2696 }
2697 #endif /* HAVE_GSSAPI */
2698
2699 if (con->best && auth_type != CUPSD_AUTH_NEGOTIATE &&
2700 !_cups_strcasecmp(con->http.hostname, "localhost"))
2701 {
2702 /*
2703 * Add a "trc" (try root certification) parameter for local non-Kerberos
2704 * requests when the request requires system group membership - then the
2705 * client knows the root certificate can/should be used.
2706 *
2707 * Also, for OS X we also look for @AUTHKEY and add an "authkey"
2708 * parameter as needed...
2709 */
2710
2711 char *name, /* Current user name */
2712 *auth_key; /* Auth key buffer */
2713 size_t auth_size; /* Size of remaining buffer */
2714
2715 auth_key = auth_str + strlen(auth_str);
2716 auth_size = sizeof(auth_str) - (auth_key - auth_str);
2717
2718 for (name = (char *)cupsArrayFirst(con->best->names);
2719 name;
2720 name = (char *)cupsArrayNext(con->best->names))
2721 {
2722 #ifdef HAVE_AUTHORIZATION_H
2723 if (!_cups_strncasecmp(name, "@AUTHKEY(", 9))
2724 {
2725 snprintf(auth_key, auth_size, ", authkey=\"%s\"", name + 9);
2726 /* end parenthesis is stripped in conf.c */
2727 break;
2728 }
2729 else
2730 #endif /* HAVE_AUTHORIZATION_H */
2731 if (!_cups_strcasecmp(name, "@SYSTEM"))
2732 {
2733 #ifdef HAVE_AUTHORIZATION_H
2734 if (SystemGroupAuthKey)
2735 snprintf(auth_key, auth_size,
2736 ", authkey=\"%s\"",
2737 SystemGroupAuthKey);
2738 else
2739 #else
2740 strlcpy(auth_key, ", trc=\"y\"", auth_size);
2741 #endif /* HAVE_AUTHORIZATION_H */
2742 break;
2743 }
2744 }
2745 }
2746
2747 if (auth_str[0])
2748 {
2749 cupsdLogMessage(CUPSD_LOG_DEBUG,
2750 "[Client %d] WWW-Authenticate: %s", con->http.fd,
2751 auth_str);
2752
2753 if (httpPrintf(HTTP(con), "WWW-Authenticate: %s\r\n", auth_str) < 0)
2754 return (0);
2755 }
2756 }
2757
2758 if (con->language && strcmp(con->language->language, "C"))
2759 {
2760 if (httpPrintf(HTTP(con), "Content-Language: %s\r\n",
2761 con->language->language) < 0)
2762 return (0);
2763 }
2764
2765 if (type)
2766 {
2767 if (!strcmp(type, "text/html"))
2768 {
2769 if (httpPrintf(HTTP(con),
2770 "Content-Type: text/html; charset=utf-8\r\n") < 0)
2771 return (0);
2772 }
2773 else if (httpPrintf(HTTP(con), "Content-Type: %s\r\n", type) < 0)
2774 return (0);
2775 }
2776
2777 return (1);
2778 }
2779
2780
2781 /*
2782 * 'cupsdUpdateCGI()' - Read status messages from CGI scripts and programs.
2783 */
2784
2785 void
2786 cupsdUpdateCGI(void)
2787 {
2788 char *ptr, /* Pointer to end of line in buffer */
2789 message[1024]; /* Pointer to message text */
2790 int loglevel; /* Log level for message */
2791
2792
2793 while ((ptr = cupsdStatBufUpdate(CGIStatusBuffer, &loglevel,
2794 message, sizeof(message))) != NULL)
2795 {
2796 if (loglevel == CUPSD_LOG_INFO)
2797 cupsdLogMessage(CUPSD_LOG_INFO, "%s", message);
2798
2799 if (!strchr(CGIStatusBuffer->buffer, '\n'))
2800 break;
2801 }
2802
2803 if (ptr == NULL && !CGIStatusBuffer->bufused)
2804 {
2805 /*
2806 * Fatal error on pipe - should never happen!
2807 */
2808
2809 cupsdLogMessage(CUPSD_LOG_CRIT,
2810 "cupsdUpdateCGI: error reading from CGI error pipe - %s",
2811 strerror(errno));
2812 }
2813 }
2814
2815
2816 /*
2817 * 'cupsdWriteClient()' - Write data to a client as needed.
2818 */
2819
2820 void
2821 cupsdWriteClient(cupsd_client_t *con) /* I - Client connection */
2822 {
2823 int bytes, /* Number of bytes written */
2824 field_col; /* Current column */
2825 char *bufptr, /* Pointer into buffer */
2826 *bufend; /* Pointer to end of buffer */
2827 ipp_state_t ipp_state; /* IPP state value */
2828
2829
2830 cupsdLogMessage(CUPSD_LOG_DEBUG,
2831 "[Client %d] cupsdWriteClient "
2832 "error=%d, "
2833 "used=%d, "
2834 "state=%s, "
2835 "data_encoding=HTTP_ENCODING_%s, "
2836 "data_remaining=" CUPS_LLFMT ", "
2837 "response=%p(%s), "
2838 "pipe_pid=%d, "
2839 "file=%d",
2840 con->http.fd, con->http.error, con->http.used,
2841 http_states[con->http.state + 1],
2842 con->http.data_encoding == HTTP_ENCODING_CHUNKED ?
2843 "CHUNKED" : "LENGTH",
2844 CUPS_LLCAST con->http.data_remaining,
2845 con->response,
2846 con->response ? ipp_states[con->response->state] : "",
2847 con->pipe_pid, con->file);
2848
2849 if (con->http.state != HTTP_STATE_GET_SEND &&
2850 con->http.state != HTTP_STATE_POST_SEND)
2851 {
2852 /*
2853 * If we get called in the wrong state, then something went wrong with the
2854 * connection and we need to shut it down...
2855 */
2856
2857 cupsdLogMessage(CUPSD_LOG_DEBUG,
2858 "[Client %d] Closing on unexpected HTTP state %s.",
2859 con->http.fd, http_states[con->http.state + 1]);
2860 cupsdCloseClient(con);
2861 return;
2862 }
2863
2864 if (con->pipe_pid)
2865 {
2866 /*
2867 * Make sure we select on the CGI output...
2868 */
2869
2870 cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con);
2871
2872 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] Waiting for CGI data.",
2873 con->http.fd);
2874
2875 if (!con->file_ready)
2876 {
2877 /*
2878 * Try again later when there is CGI output available...
2879 */
2880
2881 cupsdRemoveSelect(con->http.fd);
2882 return;
2883 }
2884
2885 con->file_ready = 0;
2886 }
2887
2888 if (con->response && con->response->state != IPP_DATA)
2889 {
2890 int wused = con->http.wused; /* Previous write buffer use */
2891
2892 do
2893 {
2894 /*
2895 * Write a single attribute or the IPP message header...
2896 */
2897
2898 ipp_state = ippWrite(HTTP(con), con->response);
2899
2900 /*
2901 * If the write buffer has been flushed, stop buffering up attributes...
2902 */
2903
2904 if (con->http.wused <= wused)
2905 break;
2906 }
2907 while (ipp_state != IPP_STATE_DATA && ipp_state != IPP_STATE_ERROR);
2908
2909 cupsdLogMessage(CUPSD_LOG_DEBUG,
2910 "[Client %d] Writing IPP response, ipp_state=%s, old "
2911 "wused=%d, new wused=%d", con->http.fd,
2912 ipp_state == IPP_STATE_ERROR ? "ERROR" :
2913 ipp_state == IPP_STATE_IDLE ? "IDLE" :
2914 ipp_state == IPP_STATE_HEADER ? "HEADER" :
2915 ipp_state == IPP_STATE_ATTRIBUTE ? "ATTRIBUTE" : "DATA",
2916 wused, con->http.wused);
2917
2918 if (con->http.wused > 0)
2919 httpFlushWrite(HTTP(con));
2920
2921 bytes = ipp_state != IPP_STATE_ERROR &&
2922 (con->file >= 0 || ipp_state != IPP_STATE_DATA);
2923
2924 cupsdLogMessage(CUPSD_LOG_DEBUG,
2925 "[Client %d] bytes=%d, http_state=%d, "
2926 "data_remaining=" CUPS_LLFMT,
2927 con->http.fd, (int)bytes, con->http.state,
2928 CUPS_LLCAST con->http.data_remaining);
2929 }
2930 else if ((bytes = read(con->file, con->header + con->header_used,
2931 sizeof(con->header) - con->header_used)) > 0)
2932 {
2933 con->header_used += bytes;
2934
2935 if (con->pipe_pid && !con->got_fields)
2936 {
2937 /*
2938 * Inspect the data for Content-Type and other fields.
2939 */
2940
2941 for (bufptr = con->header, bufend = con->header + con->header_used,
2942 field_col = 0;
2943 !con->got_fields && bufptr < bufend;
2944 bufptr ++)
2945 {
2946 if (*bufptr == '\n')
2947 {
2948 /*
2949 * Send line to client...
2950 */
2951
2952 if (bufptr > con->header && bufptr[-1] == '\r')
2953 bufptr[-1] = '\0';
2954 *bufptr++ = '\0';
2955
2956 cupsdLogMessage(CUPSD_LOG_DEBUG, "Script header: %s", con->header);
2957
2958 if (!con->sent_header)
2959 {
2960 /*
2961 * Handle redirection and CGI status codes...
2962 */
2963
2964 if (!_cups_strncasecmp(con->header, "Location:", 9))
2965 {
2966 if (!cupsdSendHeader(con, HTTP_SEE_OTHER, NULL, CUPSD_AUTH_NONE))
2967 {
2968 cupsdCloseClient(con);
2969 return;
2970 }
2971
2972 con->sent_header = 2;
2973
2974 if (httpPrintf(HTTP(con), "Content-Length: 0\r\n") < 0)
2975 return;
2976 }
2977 else if (!_cups_strncasecmp(con->header, "Status:", 7))
2978 {
2979 cupsdSendError(con, (http_status_t)atoi(con->header + 7),
2980 CUPSD_AUTH_NONE);
2981 con->sent_header = 2;
2982 }
2983 else
2984 {
2985 if (!cupsdSendHeader(con, HTTP_OK, NULL, CUPSD_AUTH_NONE))
2986 {
2987 cupsdCloseClient(con);
2988 return;
2989 }
2990
2991 con->sent_header = 1;
2992
2993 if (con->http.version == HTTP_1_1)
2994 {
2995 if (httpPrintf(HTTP(con), "Transfer-Encoding: chunked\r\n") < 0)
2996 return;
2997 }
2998 }
2999 }
3000
3001 if (_cups_strncasecmp(con->header, "Status:", 7))
3002 httpPrintf(HTTP(con), "%s\r\n", con->header);
3003
3004 /*
3005 * Update buffer...
3006 */
3007
3008 con->header_used -= bufptr - con->header;
3009
3010 if (con->header_used > 0)
3011 memmove(con->header, bufptr, con->header_used);
3012
3013 bufptr = con->header - 1;
3014
3015 /*
3016 * See if the line was empty...
3017 */
3018
3019 if (field_col == 0)
3020 {
3021 con->got_fields = 1;
3022
3023 if (cupsdFlushHeader(con) < 0)
3024 {
3025 cupsdCloseClient(con);
3026 return;
3027 }
3028
3029 if (con->http.version == HTTP_1_1)
3030 con->http.data_encoding = HTTP_ENCODING_CHUNKED;
3031 }
3032 else
3033 field_col = 0;
3034 }
3035 else if (*bufptr != '\r')
3036 field_col ++;
3037 }
3038
3039 if (!con->got_fields)
3040 {
3041 con->http.activity = time(NULL);
3042 return;
3043 }
3044 }
3045
3046 if (con->header_used > 0)
3047 {
3048 if (httpWrite2(HTTP(con), con->header, con->header_used) < 0)
3049 {
3050 cupsdLogMessage(CUPSD_LOG_DEBUG,
3051 "[Client %d] Closing for error %d (%s)",
3052 con->http.fd, con->http.error,
3053 strerror(con->http.error));
3054 cupsdCloseClient(con);
3055 return;
3056 }
3057
3058 if (con->http.data_encoding == HTTP_ENCODING_CHUNKED)
3059 httpFlushWrite(HTTP(con));
3060
3061 con->bytes += con->header_used;
3062
3063 if (con->http.state == HTTP_STATE_WAITING)
3064 bytes = 0;
3065 else
3066 bytes = con->header_used;
3067
3068 con->header_used = 0;
3069 }
3070 }
3071
3072 if (bytes <= 0 ||
3073 (con->http.state != HTTP_STATE_GET_SEND &&
3074 con->http.state != HTTP_STATE_POST_SEND))
3075 {
3076 if (!con->sent_header && con->pipe_pid)
3077 cupsdSendError(con, HTTP_SERVER_ERROR, CUPSD_AUTH_NONE);
3078 else
3079 {
3080 cupsdLogRequest(con, HTTP_OK);
3081
3082 httpFlushWrite(HTTP(con));
3083
3084 if (con->http.data_encoding == HTTP_ENCODING_CHUNKED &&
3085 con->sent_header == 1)
3086 {
3087 if (httpWrite2(HTTP(con), "", 0) < 0)
3088 {
3089 cupsdLogMessage(CUPSD_LOG_DEBUG,
3090 "[Client %d] Closing for error %d (%s)",
3091 con->http.fd, con->http.error,
3092 strerror(con->http.error));
3093 cupsdCloseClient(con);
3094 return;
3095 }
3096 }
3097 }
3098
3099 con->http.state = HTTP_STATE_WAITING;
3100
3101 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
3102
3103 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] Waiting for request.",
3104 con->http.fd);
3105
3106 if (con->file >= 0)
3107 {
3108 cupsdRemoveSelect(con->file);
3109
3110 if (con->pipe_pid)
3111 cupsdEndProcess(con->pipe_pid, 0);
3112
3113 close(con->file);
3114 con->file = -1;
3115 con->pipe_pid = 0;
3116 }
3117
3118 if (con->filename)
3119 {
3120 unlink(con->filename);
3121 cupsdClearString(&con->filename);
3122 }
3123
3124 if (con->request)
3125 {
3126 ippDelete(con->request);
3127 con->request = NULL;
3128 }
3129
3130 if (con->response)
3131 {
3132 ippDelete(con->response);
3133 con->response = NULL;
3134 }
3135
3136 cupsdClearString(&con->command);
3137 cupsdClearString(&con->options);
3138 cupsdClearString(&con->query_string);
3139
3140 if (!con->http.keep_alive)
3141 {
3142 cupsdLogMessage(CUPSD_LOG_DEBUG,
3143 "[Client %d] Closing because Keep-Alive disabled.",
3144 con->http.fd);
3145 cupsdCloseClient(con);
3146 return;
3147 }
3148 else
3149 {
3150 cupsArrayRemove(ActiveClients, con);
3151 cupsdSetBusyState();
3152 }
3153 }
3154
3155 con->http.activity = time(NULL);
3156 }
3157
3158
3159 /*
3160 * 'check_if_modified()' - Decode an "If-Modified-Since" line.
3161 */
3162
3163 static int /* O - 1 if modified since */
3164 check_if_modified(
3165 cupsd_client_t *con, /* I - Client connection */
3166 struct stat *filestats) /* I - File information */
3167 {
3168 char *ptr; /* Pointer into field */
3169 time_t date; /* Time/date value */
3170 off_t size; /* Size/length value */
3171
3172
3173 size = 0;
3174 date = 0;
3175 ptr = con->http.fields[HTTP_FIELD_IF_MODIFIED_SINCE];
3176
3177 if (*ptr == '\0')
3178 return (1);
3179
3180 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3181 "[Client %d] check_if_modified "
3182 "filestats=%p(" CUPS_LLFMT ", %d)) If-Modified-Since=\"%s\"",
3183 con->http.fd, filestats, CUPS_LLCAST filestats->st_size,
3184 (int)filestats->st_mtime, ptr);
3185
3186 while (*ptr != '\0')
3187 {
3188 while (isspace(*ptr) || *ptr == ';')
3189 ptr ++;
3190
3191 if (_cups_strncasecmp(ptr, "length=", 7) == 0)
3192 {
3193 ptr += 7;
3194 size = strtoll(ptr, NULL, 10);
3195
3196 while (isdigit(*ptr))
3197 ptr ++;
3198 }
3199 else if (isalpha(*ptr))
3200 {
3201 date = httpGetDateTime(ptr);
3202 while (*ptr != '\0' && *ptr != ';')
3203 ptr ++;
3204 }
3205 else
3206 ptr ++;
3207 }
3208
3209 return ((size != filestats->st_size && size != 0) ||
3210 (date < filestats->st_mtime && date != 0) ||
3211 (size == 0 && date == 0));
3212 }
3213
3214
3215 /*
3216 * 'compare_clients()' - Compare two client connections.
3217 */
3218
3219 static int /* O - Result of comparison */
3220 compare_clients(cupsd_client_t *a, /* I - First client */
3221 cupsd_client_t *b, /* I - Second client */
3222 void *data) /* I - User data (not used) */
3223 {
3224 (void)data;
3225
3226 if (a == b)
3227 return (0);
3228 else if (a < b)
3229 return (-1);
3230 else
3231 return (1);
3232 }
3233
3234
3235 /*
3236 * 'data_ready()' - Check whether data is available from a client.
3237 */
3238
3239 static int /* O - 1 if data is ready, 0 otherwise */
3240 data_ready(cupsd_client_t *con) /* I - Client */
3241 {
3242 if (con->http.used > 0)
3243 return (1);
3244 #ifdef HAVE_SSL
3245 else if (con->http.tls)
3246 {
3247 # ifdef HAVE_LIBSSL
3248 if (SSL_pending((SSL *)(con->http.tls)))
3249 return (1);
3250 # elif defined(HAVE_GNUTLS)
3251 if (gnutls_record_check_pending(con->http.tls))
3252 return (1);
3253 # elif defined(HAVE_CDSASSL)
3254 size_t bytes; /* Bytes that are available */
3255
3256 if (!SSLGetBufferedReadSize(con->http.tls, &bytes) && bytes > 0)
3257 return (1);
3258 # endif /* HAVE_LIBSSL */
3259 }
3260 #endif /* HAVE_SSL */
3261
3262 return (0);
3263 }
3264
3265
3266 /*
3267 * 'get_file()' - Get a filename and state info.
3268 */
3269
3270 static char * /* O - Real filename */
3271 get_file(cupsd_client_t *con, /* I - Client connection */
3272 struct stat *filestats, /* O - File information */
3273 char *filename, /* IO - Filename buffer */
3274 int len) /* I - Buffer length */
3275 {
3276 int status; /* Status of filesystem calls */
3277 char *ptr; /* Pointer info filename */
3278 int plen; /* Remaining length after pointer */
3279 char language[7]; /* Language subdirectory, if any */
3280
3281
3282 /*
3283 * Figure out the real filename...
3284 */
3285
3286 language[0] = '\0';
3287
3288 if (!strncmp(con->uri, "/ppd/", 5) && !strchr(con->uri + 5, '/'))
3289 snprintf(filename, len, "%s%s", ServerRoot, con->uri);
3290 else if (!strncmp(con->uri, "/icons/", 7) && !strchr(con->uri + 7, '/'))
3291 {
3292 snprintf(filename, len, "%s/%s", CacheDir, con->uri + 7);
3293 if (access(filename, F_OK) < 0)
3294 snprintf(filename, len, "%s/images/generic.png", DocumentRoot);
3295 }
3296 else if (!strncmp(con->uri, "/rss/", 5) && !strchr(con->uri + 5, '/'))
3297 snprintf(filename, len, "%s/rss/%s", CacheDir, con->uri + 5);
3298 else if (!strncmp(con->uri, "/admin/conf/", 12))
3299 snprintf(filename, len, "%s%s", ServerRoot, con->uri + 11);
3300 else if (!strncmp(con->uri, "/admin/log/", 11))
3301 {
3302 if (!strncmp(con->uri + 11, "access_log", 10) && AccessLog[0] == '/')
3303 strlcpy(filename, AccessLog, len);
3304 else if (!strncmp(con->uri + 11, "error_log", 9) && ErrorLog[0] == '/')
3305 strlcpy(filename, ErrorLog, len);
3306 else if (!strncmp(con->uri + 11, "page_log", 8) && PageLog[0] == '/')
3307 strlcpy(filename, PageLog, len);
3308 else
3309 return (NULL);
3310 }
3311 else if (con->language)
3312 {
3313 snprintf(language, sizeof(language), "/%s", con->language->language);
3314 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3315 }
3316 else
3317 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3318
3319 if ((ptr = strchr(filename, '?')) != NULL)
3320 *ptr = '\0';
3321
3322 /*
3323 * Grab the status for this language; if there isn't a language-specific file
3324 * then fallback to the default one...
3325 */
3326
3327 if ((status = stat(filename, filestats)) != 0 && language[0] &&
3328 strncmp(con->uri, "/icons/", 7) &&
3329 strncmp(con->uri, "/ppd/", 5) &&
3330 strncmp(con->uri, "/rss/", 5) &&
3331 strncmp(con->uri, "/admin/conf/", 12) &&
3332 strncmp(con->uri, "/admin/log/", 11))
3333 {
3334 /*
3335 * Drop the country code...
3336 */
3337
3338 language[3] = '\0';
3339 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3340
3341 if ((ptr = strchr(filename, '?')) != NULL)
3342 *ptr = '\0';
3343
3344 if ((status = stat(filename, filestats)) != 0)
3345 {
3346 /*
3347 * Drop the language prefix and try the root directory...
3348 */
3349
3350 language[0] = '\0';
3351 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3352
3353 if ((ptr = strchr(filename, '?')) != NULL)
3354 *ptr = '\0';
3355
3356 status = stat(filename, filestats);
3357 }
3358 }
3359
3360 /*
3361 * If we're found a directory, get the index.html file instead...
3362 */
3363
3364 if (!status && S_ISDIR(filestats->st_mode))
3365 {
3366 /*
3367 * Make sure the URI ends with a slash...
3368 */
3369
3370 if (con->uri[strlen(con->uri) - 1] != '/')
3371 strlcat(con->uri, "/", sizeof(con->uri));
3372
3373 /*
3374 * Find the directory index file, trying every language...
3375 */
3376
3377 do
3378 {
3379 if (status && language[0])
3380 {
3381 /*
3382 * Try a different language subset...
3383 */
3384
3385 if (language[3])
3386 language[0] = '\0'; /* Strip country code */
3387 else
3388 language[0] = '\0'; /* Strip language */
3389 }
3390
3391 /*
3392 * Look for the index file...
3393 */
3394
3395 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3396
3397 if ((ptr = strchr(filename, '?')) != NULL)
3398 *ptr = '\0';
3399
3400 ptr = filename + strlen(filename);
3401 plen = len - (ptr - filename);
3402
3403 strlcpy(ptr, "index.html", plen);
3404 status = stat(filename, filestats);
3405
3406 #ifdef HAVE_JAVA
3407 if (status)
3408 {
3409 strlcpy(ptr, "index.class", plen);
3410 status = stat(filename, filestats);
3411 }
3412 #endif /* HAVE_JAVA */
3413
3414 #ifdef HAVE_PERL
3415 if (status)
3416 {
3417 strlcpy(ptr, "index.pl", plen);
3418 status = stat(filename, filestats);
3419 }
3420 #endif /* HAVE_PERL */
3421
3422 #ifdef HAVE_PHP
3423 if (status)
3424 {
3425 strlcpy(ptr, "index.php", plen);
3426 status = stat(filename, filestats);
3427 }
3428 #endif /* HAVE_PHP */
3429
3430 #ifdef HAVE_PYTHON
3431 if (status)
3432 {
3433 strlcpy(ptr, "index.pyc", plen);
3434 status = stat(filename, filestats);
3435 }
3436
3437 if (status)
3438 {
3439 strlcpy(ptr, "index.py", plen);
3440 status = stat(filename, filestats);
3441 }
3442 #endif /* HAVE_PYTHON */
3443
3444 }
3445 while (status && language[0]);
3446 }
3447
3448 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3449 "[Client %d] get_file filestats=%p, filename=%p, len=%d, "
3450 "returning \"%s\".", con->http.fd, filestats, filename, len,
3451 status ? "(null)" : filename);
3452
3453 if (status)
3454 return (NULL);
3455 else
3456 return (filename);
3457 }
3458
3459
3460 /*
3461 * 'install_cupsd_conf()' - Install a configuration file.
3462 */
3463
3464 static http_status_t /* O - Status */
3465 install_cupsd_conf(cupsd_client_t *con) /* I - Connection */
3466 {
3467 char filename[1024]; /* Configuration filename */
3468 cups_file_t *in, /* Input file */
3469 *out; /* Output file */
3470 char buffer[16384]; /* Copy buffer */
3471 ssize_t bytes; /* Number of bytes */
3472
3473
3474 /*
3475 * Open the request file...
3476 */
3477
3478 if ((in = cupsFileOpen(con->filename, "rb")) == NULL)
3479 {
3480 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open request file \"%s\": %s",
3481 con->filename, strerror(errno));
3482 return (HTTP_SERVER_ERROR);
3483 }
3484
3485 /*
3486 * Open the new config file...
3487 */
3488
3489 if ((out = cupsdCreateConfFile(ConfigurationFile, ConfigFilePerm)) == NULL)
3490 {
3491 cupsFileClose(in);
3492 return (HTTP_SERVER_ERROR);
3493 }
3494
3495 cupsdLogMessage(CUPSD_LOG_INFO, "Installing config file \"%s\"...",
3496 ConfigurationFile);
3497
3498 /*
3499 * Copy from the request to the new config file...
3500 */
3501
3502 while ((bytes = cupsFileRead(in, buffer, sizeof(buffer))) > 0)
3503 if (cupsFileWrite(out, buffer, bytes) < bytes)
3504 {
3505 cupsdLogMessage(CUPSD_LOG_ERROR,
3506 "Unable to copy to config file \"%s\": %s",
3507 ConfigurationFile, strerror(errno));
3508
3509 cupsFileClose(in);
3510 cupsFileClose(out);
3511
3512 snprintf(filename, sizeof(filename), "%s.N", ConfigurationFile);
3513 cupsdUnlinkOrRemoveFile(filename);
3514
3515 return (HTTP_SERVER_ERROR);
3516 }
3517
3518 /*
3519 * Close the files...
3520 */
3521
3522 cupsFileClose(in);
3523
3524 if (cupsdCloseCreatedConfFile(out, ConfigurationFile))
3525 return (HTTP_SERVER_ERROR);
3526
3527 /*
3528 * Remove the request file...
3529 */
3530
3531 cupsdUnlinkOrRemoveFile(con->filename);
3532 cupsdClearString(&con->filename);
3533
3534 /*
3535 * Set the NeedReload flag...
3536 */
3537
3538 NeedReload = RELOAD_CUPSD;
3539 ReloadTime = time(NULL);
3540
3541 /*
3542 * Return that the file was created successfully...
3543 */
3544
3545 return (HTTP_CREATED);
3546 }
3547
3548
3549 /*
3550 * 'is_cgi()' - Is the resource a CGI script/program?
3551 */
3552
3553 static int /* O - 1 = CGI, 0 = file */
3554 is_cgi(cupsd_client_t *con, /* I - Client connection */
3555 const char *filename, /* I - Real filename */
3556 struct stat *filestats, /* I - File information */
3557 mime_type_t *type) /* I - MIME type */
3558 {
3559 const char *options; /* Options on URL */
3560
3561
3562 /*
3563 * Get the options, if any...
3564 */
3565
3566 if ((options = strchr(con->uri, '?')) != NULL)
3567 {
3568 options ++;
3569 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", options);
3570 }
3571
3572 /*
3573 * Check for known types...
3574 */
3575
3576 if (!type || _cups_strcasecmp(type->super, "application"))
3577 {
3578 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3579 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3580 "type=%s/%s, returning 0", con->http.fd, filename,
3581 filestats, type ? type->super : "unknown",
3582 type ? type->type : "unknown");
3583 return (0);
3584 }
3585
3586 if (!_cups_strcasecmp(type->type, "x-httpd-cgi") &&
3587 (filestats->st_mode & 0111))
3588 {
3589 /*
3590 * "application/x-httpd-cgi" is a CGI script.
3591 */
3592
3593 cupsdSetString(&con->command, filename);
3594
3595 if (options)
3596 cupsdSetStringf(&con->options, " %s", options);
3597
3598 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3599 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3600 "type=%s/%s, returning 1", con->http.fd, filename,
3601 filestats, type->super, type->type);
3602 return (1);
3603 }
3604 #ifdef HAVE_JAVA
3605 else if (!_cups_strcasecmp(type->type, "x-httpd-java"))
3606 {
3607 /*
3608 * "application/x-httpd-java" is a Java servlet.
3609 */
3610
3611 cupsdSetString(&con->command, CUPS_JAVA);
3612
3613 if (options)
3614 cupsdSetStringf(&con->options, " %s %s", filename, options);
3615 else
3616 cupsdSetStringf(&con->options, " %s", filename);
3617
3618 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3619 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3620 "type=%s/%s, returning 1", con->http.fd, filename,
3621 filestats, type->super, type->type);
3622 return (1);
3623 }
3624 #endif /* HAVE_JAVA */
3625 #ifdef HAVE_PERL
3626 else if (!_cups_strcasecmp(type->type, "x-httpd-perl"))
3627 {
3628 /*
3629 * "application/x-httpd-perl" is a Perl page.
3630 */
3631
3632 cupsdSetString(&con->command, CUPS_PERL);
3633
3634 if (options)
3635 cupsdSetStringf(&con->options, " %s %s", filename, options);
3636 else
3637 cupsdSetStringf(&con->options, " %s", filename);
3638
3639 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3640 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3641 "type=%s/%s, returning 1", con->http.fd, filename,
3642 filestats, type->super, type->type);
3643 return (1);
3644 }
3645 #endif /* HAVE_PERL */
3646 #ifdef HAVE_PHP
3647 else if (!_cups_strcasecmp(type->type, "x-httpd-php"))
3648 {
3649 /*
3650 * "application/x-httpd-php" is a PHP page.
3651 */
3652
3653 cupsdSetString(&con->command, CUPS_PHP);
3654
3655 if (options)
3656 cupsdSetStringf(&con->options, " %s %s", filename, options);
3657 else
3658 cupsdSetStringf(&con->options, " %s", filename);
3659
3660 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3661 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3662 "type=%s/%s, returning 1", con->http.fd, filename,
3663 filestats, type->super, type->type);
3664 return (1);
3665 }
3666 #endif /* HAVE_PHP */
3667 #ifdef HAVE_PYTHON
3668 else if (!_cups_strcasecmp(type->type, "x-httpd-python"))
3669 {
3670 /*
3671 * "application/x-httpd-python" is a Python page.
3672 */
3673
3674 cupsdSetString(&con->command, CUPS_PYTHON);
3675
3676 if (options)
3677 cupsdSetStringf(&con->options, " %s %s", filename, options);
3678 else
3679 cupsdSetStringf(&con->options, " %s", filename);
3680
3681 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3682 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3683 "type=%s/%s, returning 1", con->http.fd, filename,
3684 filestats, type->super, type->type);
3685 return (1);
3686 }
3687 #endif /* HAVE_PYTHON */
3688
3689 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3690 "[Client %d] is_cgi filename=\"%s\", filestats=%p, "
3691 "type=%s/%s, returning 0", con->http.fd, filename,
3692 filestats, type->super, type->type);
3693 return (0);
3694 }
3695
3696
3697 /*
3698 * 'is_path_absolute()' - Is a path absolute and free of relative elements (i.e. "..").
3699 */
3700
3701 static int /* O - 0 if relative, 1 if absolute */
3702 is_path_absolute(const char *path) /* I - Input path */
3703 {
3704 /*
3705 * Check for a leading slash...
3706 */
3707
3708 if (path[0] != '/')
3709 return (0);
3710
3711 /*
3712 * Check for "/.." in the path...
3713 */
3714
3715 while ((path = strstr(path, "/..")) != NULL)
3716 {
3717 if (!path[3] || path[3] == '/')
3718 return (0);
3719
3720 path ++;
3721 }
3722
3723 /*
3724 * If we haven't found any relative paths, return 1 indicating an
3725 * absolute path...
3726 */
3727
3728 return (1);
3729 }
3730
3731
3732 /*
3733 * 'pipe_command()' - Pipe the output of a command to the remote client.
3734 */
3735
3736 static int /* O - Process ID */
3737 pipe_command(cupsd_client_t *con, /* I - Client connection */
3738 int infile, /* I - Standard input for command */
3739 int *outfile, /* O - Standard output for command */
3740 char *command, /* I - Command to run */
3741 char *options, /* I - Options for command */
3742 int root) /* I - Run as root? */
3743 {
3744 int i; /* Looping var */
3745 int pid; /* Process ID */
3746 char *commptr, /* Command string pointer */
3747 commch; /* Command string character */
3748 char *uriptr; /* URI string pointer */
3749 int fds[2]; /* Pipe FDs */
3750 int argc; /* Number of arguments */
3751 int envc; /* Number of environment variables */
3752 char argbuf[10240], /* Argument buffer */
3753 *argv[100], /* Argument strings */
3754 *envp[MAX_ENV + 20]; /* Environment variables */
3755 char auth_type[256], /* AUTH_TYPE environment variable */
3756 content_length[1024], /* CONTENT_LENGTH environment variable */
3757 content_type[1024], /* CONTENT_TYPE environment variable */
3758 http_cookie[32768], /* HTTP_COOKIE environment variable */
3759 http_referer[1024], /* HTTP_REFERER environment variable */
3760 http_user_agent[1024], /* HTTP_USER_AGENT environment variable */
3761 lang[1024], /* LANG environment variable */
3762 path_info[1024], /* PATH_INFO environment variable */
3763 remote_addr[1024], /* REMOTE_ADDR environment variable */
3764 remote_host[1024], /* REMOTE_HOST environment variable */
3765 remote_user[1024], /* REMOTE_USER environment variable */
3766 script_filename[1024], /* SCRIPT_FILENAME environment variable */
3767 script_name[1024], /* SCRIPT_NAME environment variable */
3768 server_name[1024], /* SERVER_NAME environment variable */
3769 server_port[1024]; /* SERVER_PORT environment variable */
3770 ipp_attribute_t *attr; /* attributes-natural-language attribute */
3771
3772
3773 /*
3774 * Parse a copy of the options string, which is of the form:
3775 *
3776 * argument+argument+argument
3777 * ?argument+argument+argument
3778 * param=value&param=value
3779 * ?param=value&param=value
3780 * /name?argument+argument+argument
3781 * /name?param=value&param=value
3782 *
3783 * If the string contains an "=" character after the initial name,
3784 * then we treat it as a HTTP GET form request and make a copy of
3785 * the remaining string for the environment variable.
3786 *
3787 * The string is always parsed out as command-line arguments, to
3788 * be consistent with Apache...
3789 */
3790
3791 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3792 "[Client %d] pipe_command infile=%d, outfile=%p, "
3793 "command=\"%s\", options=\"%s\", root=%d",
3794 con->http.fd, infile, outfile, command,
3795 options ? options : "(null)", root);
3796
3797 argv[0] = command;
3798
3799 if (options)
3800 {
3801 commptr = options;
3802 if (*commptr == ' ')
3803 commptr ++;
3804 strlcpy(argbuf, commptr, sizeof(argbuf));
3805 }
3806 else
3807 argbuf[0] = '\0';
3808
3809 if (argbuf[0] == '/')
3810 {
3811 /*
3812 * Found some trailing path information, set PATH_INFO...
3813 */
3814
3815 if ((commptr = strchr(argbuf, '?')) == NULL)
3816 commptr = argbuf + strlen(argbuf);
3817
3818 commch = *commptr;
3819 *commptr = '\0';
3820 snprintf(path_info, sizeof(path_info), "PATH_INFO=%s", argbuf);
3821 *commptr = commch;
3822 }
3823 else
3824 {
3825 commptr = argbuf;
3826 path_info[0] = '\0';
3827
3828 if (*commptr == ' ')
3829 commptr ++;
3830 }
3831
3832 if (*commptr == '?' && con->operation == HTTP_STATE_GET && !con->query_string)
3833 {
3834 commptr ++;
3835 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", commptr);
3836 }
3837
3838 argc = 1;
3839
3840 if (*commptr)
3841 {
3842 argv[argc ++] = commptr;
3843
3844 for (; *commptr && argc < 99; commptr ++)
3845 {
3846 /*
3847 * Break arguments whenever we see a + or space...
3848 */
3849
3850 if (*commptr == ' ' || *commptr == '+')
3851 {
3852 while (*commptr == ' ' || *commptr == '+')
3853 *commptr++ = '\0';
3854
3855 /*
3856 * If we don't have a blank string, save it as another argument...
3857 */
3858
3859 if (*commptr)
3860 {
3861 argv[argc] = commptr;
3862 argc ++;
3863 }
3864 else
3865 break;
3866 }
3867 else if (*commptr == '%' && isxdigit(commptr[1] & 255) &&
3868 isxdigit(commptr[2] & 255))
3869 {
3870 /*
3871 * Convert the %xx notation to the individual character.
3872 */
3873
3874 if (commptr[1] >= '0' && commptr[1] <= '9')
3875 *commptr = (commptr[1] - '0') << 4;
3876 else
3877 *commptr = (tolower(commptr[1]) - 'a' + 10) << 4;
3878
3879 if (commptr[2] >= '0' && commptr[2] <= '9')
3880 *commptr |= commptr[2] - '0';
3881 else
3882 *commptr |= tolower(commptr[2]) - 'a' + 10;
3883
3884 _cups_strcpy(commptr + 1, commptr + 3);
3885
3886 /*
3887 * Check for a %00 and break if that is the case...
3888 */
3889
3890 if (!*commptr)
3891 break;
3892 }
3893 }
3894 }
3895
3896 argv[argc] = NULL;
3897
3898 /*
3899 * Setup the environment variables as needed...
3900 */
3901
3902 if (con->username[0])
3903 {
3904 snprintf(auth_type, sizeof(auth_type), "AUTH_TYPE=%s",
3905 httpGetField(HTTP(con), HTTP_FIELD_AUTHORIZATION));
3906
3907 if ((uriptr = strchr(auth_type + 10, ' ')) != NULL)
3908 *uriptr = '\0';
3909 }
3910 else
3911 auth_type[0] = '\0';
3912
3913 if (con->request &&
3914 (attr = ippFindAttribute(con->request, "attributes-natural-language",
3915 IPP_TAG_LANGUAGE)) != NULL)
3916 {
3917 switch (strlen(attr->values[0].string.text))
3918 {
3919 default :
3920 /*
3921 * This is an unknown or badly formatted language code; use
3922 * the POSIX locale...
3923 */
3924
3925 strlcpy(lang, "LANG=C", sizeof(lang));
3926 break;
3927
3928 case 2 :
3929 /*
3930 * Just the language code (ll)...
3931 */
3932
3933 snprintf(lang, sizeof(lang), "LANG=%s.UTF8",
3934 attr->values[0].string.text);
3935 break;
3936
3937 case 5 :
3938 /*
3939 * Language and country code (ll-cc)...
3940 */
3941
3942 snprintf(lang, sizeof(lang), "LANG=%c%c_%c%c.UTF8",
3943 attr->values[0].string.text[0],
3944 attr->values[0].string.text[1],
3945 toupper(attr->values[0].string.text[3] & 255),
3946 toupper(attr->values[0].string.text[4] & 255));
3947 break;
3948 }
3949 }
3950 else if (con->language)
3951 snprintf(lang, sizeof(lang), "LANG=%s.UTF8", con->language->language);
3952 else
3953 strlcpy(lang, "LANG=C", sizeof(lang));
3954
3955 strlcpy(remote_addr, "REMOTE_ADDR=", sizeof(remote_addr));
3956 httpAddrString(con->http.hostaddr, remote_addr + 12,
3957 sizeof(remote_addr) - 12);
3958
3959 snprintf(remote_host, sizeof(remote_host), "REMOTE_HOST=%s",
3960 con->http.hostname);
3961
3962 snprintf(script_name, sizeof(script_name), "SCRIPT_NAME=%s", con->uri);
3963 if ((uriptr = strchr(script_name, '?')) != NULL)
3964 *uriptr = '\0';
3965
3966 snprintf(script_filename, sizeof(script_filename), "SCRIPT_FILENAME=%s%s",
3967 DocumentRoot, script_name + 12);
3968
3969 sprintf(server_port, "SERVER_PORT=%d", con->serverport);
3970
3971 if (con->http.fields[HTTP_FIELD_HOST][0])
3972 {
3973 char *nameptr; /* Pointer to ":port" */
3974
3975 snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s",
3976 con->http.fields[HTTP_FIELD_HOST]);
3977 if ((nameptr = strrchr(server_name, ':')) != NULL && !strchr(nameptr, ']'))
3978 *nameptr = '\0'; /* Strip trailing ":port" */
3979 }
3980 else
3981 snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s",
3982 con->servername);
3983
3984 envc = cupsdLoadEnv(envp, (int)(sizeof(envp) / sizeof(envp[0])));
3985
3986 if (auth_type[0])
3987 envp[envc ++] = auth_type;
3988
3989 envp[envc ++] = lang;
3990 envp[envc ++] = "REDIRECT_STATUS=1";
3991 envp[envc ++] = "GATEWAY_INTERFACE=CGI/1.1";
3992 envp[envc ++] = server_name;
3993 envp[envc ++] = server_port;
3994 envp[envc ++] = remote_addr;
3995 envp[envc ++] = remote_host;
3996 envp[envc ++] = script_name;
3997 envp[envc ++] = script_filename;
3998
3999 if (path_info[0])
4000 envp[envc ++] = path_info;
4001
4002 if (con->username[0])
4003 {
4004 snprintf(remote_user, sizeof(remote_user), "REMOTE_USER=%s", con->username);
4005
4006 envp[envc ++] = remote_user;
4007 }
4008
4009 if (con->http.version == HTTP_1_1)
4010 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.1";
4011 else if (con->http.version == HTTP_1_0)
4012 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.0";
4013 else
4014 envp[envc ++] = "SERVER_PROTOCOL=HTTP/0.9";
4015
4016 if (con->http.cookie)
4017 {
4018 snprintf(http_cookie, sizeof(http_cookie), "HTTP_COOKIE=%s",
4019 con->http.cookie);
4020 envp[envc ++] = http_cookie;
4021 }
4022
4023 if (con->http.fields[HTTP_FIELD_USER_AGENT][0])
4024 {
4025 snprintf(http_user_agent, sizeof(http_user_agent), "HTTP_USER_AGENT=%s",
4026 con->http.fields[HTTP_FIELD_USER_AGENT]);
4027 envp[envc ++] = http_user_agent;
4028 }
4029
4030 if (con->http.fields[HTTP_FIELD_REFERER][0])
4031 {
4032 snprintf(http_referer, sizeof(http_referer), "HTTP_REFERER=%s",
4033 con->http.fields[HTTP_FIELD_REFERER]);
4034 envp[envc ++] = http_referer;
4035 }
4036
4037 if (con->operation == HTTP_STATE_GET)
4038 {
4039 envp[envc ++] = "REQUEST_METHOD=GET";
4040
4041 if (con->query_string)
4042 {
4043 /*
4044 * Add GET form variables after ?...
4045 */
4046
4047 envp[envc ++] = con->query_string;
4048 }
4049 else
4050 envp[envc ++] = "QUERY_STRING=";
4051 }
4052 else
4053 {
4054 sprintf(content_length, "CONTENT_LENGTH=" CUPS_LLFMT,
4055 CUPS_LLCAST con->bytes);
4056 snprintf(content_type, sizeof(content_type), "CONTENT_TYPE=%s",
4057 con->http.fields[HTTP_FIELD_CONTENT_TYPE]);
4058
4059 envp[envc ++] = "REQUEST_METHOD=POST";
4060 envp[envc ++] = content_length;
4061 envp[envc ++] = content_type;
4062 }
4063
4064 /*
4065 * Tell the CGI if we are using encryption...
4066 */
4067
4068 if (con->http.tls)
4069 envp[envc ++] = "HTTPS=ON";
4070
4071 /*
4072 * Terminate the environment array...
4073 */
4074
4075 envp[envc] = NULL;
4076
4077 if (LogLevel >= CUPSD_LOG_DEBUG)
4078 {
4079 for (i = 0; i < argc; i ++)
4080 cupsdLogMessage(CUPSD_LOG_DEBUG,
4081 "[CGI] argv[%d] = \"%s\"", i, argv[i]);
4082 for (i = 0; i < envc; i ++)
4083 cupsdLogMessage(CUPSD_LOG_DEBUG,
4084 "[CGI] envp[%d] = \"%s\"", i, envp[i]);
4085 }
4086
4087 /*
4088 * Create a pipe for the output...
4089 */
4090
4091 if (cupsdOpenPipe(fds))
4092 {
4093 cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to create pipe for %s - %s",
4094 argv[0], strerror(errno));
4095 return (0);
4096 }
4097
4098 /*
4099 * Then execute the command...
4100 */
4101
4102 if (cupsdStartProcess(command, argv, envp, infile, fds[1], CGIPipes[1],
4103 -1, -1, root, DefaultProfile, NULL, &pid) < 0)
4104 {
4105 /*
4106 * Error - can't fork!
4107 */
4108
4109 cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to start %s - %s", argv[0],
4110 strerror(errno));
4111
4112 cupsdClosePipe(fds);
4113 pid = 0;
4114 }
4115 else
4116 {
4117 /*
4118 * Fork successful - return the PID...
4119 */
4120
4121 if (con->username[0])
4122 cupsdAddCert(pid, con->username, con->type);
4123
4124 cupsdLogMessage(CUPSD_LOG_DEBUG, "[CGI] Started %s (PID %d)", command, pid);
4125
4126 *outfile = fds[0];
4127 close(fds[1]);
4128 }
4129
4130 return (pid);
4131 }
4132
4133
4134 /*
4135 * 'valid_host()' - Is the Host: field valid?
4136 */
4137
4138 static int /* O - 1 if valid, 0 if not */
4139 valid_host(cupsd_client_t *con) /* I - Client connection */
4140 {
4141 cupsd_alias_t *a; /* Current alias */
4142 cupsd_netif_t *netif; /* Current network interface */
4143 const char *end; /* End character */
4144 char *ptr; /* Pointer into host value */
4145
4146
4147 /*
4148 * Copy the Host: header for later use...
4149 */
4150
4151 strlcpy(con->clientname, con->http.fields[HTTP_FIELD_HOST],
4152 sizeof(con->clientname));
4153 if ((ptr = strrchr(con->clientname, ':')) != NULL && !strchr(ptr, ']'))
4154 {
4155 *ptr++ = '\0';
4156 con->clientport = atoi(ptr);
4157 }
4158 else
4159 con->clientport = con->serverport;
4160
4161 /*
4162 * Then validate...
4163 */
4164
4165 if (httpAddrLocalhost(con->http.hostaddr))
4166 {
4167 /*
4168 * Only allow "localhost" or the equivalent IPv4 or IPv6 numerical
4169 * addresses when accessing CUPS via the loopback interface...
4170 */
4171
4172 return (!_cups_strcasecmp(con->clientname, "localhost") ||
4173 !_cups_strcasecmp(con->clientname, "localhost.") ||
4174 #ifdef __linux
4175 !_cups_strcasecmp(con->clientname, "localhost.localdomain") ||
4176 #endif /* __linux */
4177 !strcmp(con->clientname, "127.0.0.1") ||
4178 !strcmp(con->clientname, "[::1]"));
4179 }
4180
4181 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
4182 /*
4183 * Check if the hostname is something.local (Bonjour); if so, allow it.
4184 */
4185
4186 if ((end = strrchr(con->clientname, '.')) != NULL && end > con->clientname &&
4187 !end[1])
4188 {
4189 /*
4190 * "." on end, work back to second-to-last "."...
4191 */
4192
4193 for (end --; end > con->clientname && *end != '.'; end --);
4194 }
4195
4196 if (end && (!_cups_strcasecmp(end, ".local") ||
4197 !_cups_strcasecmp(end, ".local.")))
4198 return (1);
4199 #endif /* HAVE_DNSSD || HAVE_AVAHI */
4200
4201 /*
4202 * Check if the hostname is an IP address...
4203 */
4204
4205 if (isdigit(con->clientname[0] & 255) || con->clientname[0] == '[')
4206 {
4207 /*
4208 * Possible IPv4/IPv6 address...
4209 */
4210
4211 http_addrlist_t *addrlist; /* List of addresses */
4212
4213
4214 if ((addrlist = httpAddrGetList(con->clientname, AF_UNSPEC, NULL)) != NULL)
4215 {
4216 /*
4217 * Good IPv4/IPv6 address...
4218 */
4219
4220 httpAddrFreeList(addrlist);
4221 return (1);
4222 }
4223 }
4224
4225 /*
4226 * Check for (alias) name matches...
4227 */
4228
4229 for (a = (cupsd_alias_t *)cupsArrayFirst(ServerAlias);
4230 a;
4231 a = (cupsd_alias_t *)cupsArrayNext(ServerAlias))
4232 {
4233 /*
4234 * "ServerAlias *" allows all host values through...
4235 */
4236
4237 if (!strcmp(a->name, "*"))
4238 return (1);
4239
4240 if (!_cups_strncasecmp(con->clientname, a->name, a->namelen))
4241 {
4242 /*
4243 * Prefix matches; check the character at the end - it must be "." or nul.
4244 */
4245
4246 end = con->clientname + a->namelen;
4247
4248 if (!*end || (*end == '.' && !end[1]))
4249 return (1);
4250 }
4251 }
4252
4253 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
4254 for (a = (cupsd_alias_t *)cupsArrayFirst(DNSSDAlias);
4255 a;
4256 a = (cupsd_alias_t *)cupsArrayNext(DNSSDAlias))
4257 {
4258 /*
4259 * "ServerAlias *" allows all host values through...
4260 */
4261
4262 if (!strcmp(a->name, "*"))
4263 return (1);
4264
4265 if (!_cups_strncasecmp(con->clientname, a->name, a->namelen))
4266 {
4267 /*
4268 * Prefix matches; check the character at the end - it must be "." or nul.
4269 */
4270
4271 end = con->clientname + a->namelen;
4272
4273 if (!*end || (*end == '.' && !end[1]))
4274 return (1);
4275 }
4276 }
4277 #endif /* HAVE_DNSSD || HAVE_AVAHI */
4278
4279 /*
4280 * Check for interface hostname matches...
4281 */
4282
4283 for (netif = (cupsd_netif_t *)cupsArrayFirst(NetIFList);
4284 netif;
4285 netif = (cupsd_netif_t *)cupsArrayNext(NetIFList))
4286 {
4287 if (!_cups_strncasecmp(con->clientname, netif->hostname, netif->hostlen))
4288 {
4289 /*
4290 * Prefix matches; check the character at the end - it must be "." or nul.
4291 */
4292
4293 end = con->clientname + netif->hostlen;
4294
4295 if (!*end || (*end == '.' && !end[1]))
4296 return (1);
4297 }
4298 }
4299
4300 return (0);
4301 }
4302
4303
4304 /*
4305 * 'write_file()' - Send a file via HTTP.
4306 */
4307
4308 static int /* O - 0 on failure, 1 on success */
4309 write_file(cupsd_client_t *con, /* I - Client connection */
4310 http_status_t code, /* I - HTTP status */
4311 char *filename, /* I - Filename */
4312 char *type, /* I - File type */
4313 struct stat *filestats) /* O - File information */
4314 {
4315 con->file = open(filename, O_RDONLY);
4316
4317 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4318 "[Client %d] write_file code=%d, filename=\"%s\" (%d), "
4319 "type=\"%s\", filestats=%p", con->http.fd,
4320 code, filename, con->file, type ? type : "(null)", filestats);
4321
4322 if (con->file < 0)
4323 return (0);
4324
4325 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
4326
4327 con->pipe_pid = 0;
4328
4329 if (!cupsdSendHeader(con, code, type, CUPSD_AUTH_NONE))
4330 return (0);
4331
4332 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
4333 httpGetDateString(filestats->st_mtime)) < 0)
4334 return (0);
4335 if (httpPrintf(HTTP(con), "Content-Length: " CUPS_LLFMT "\r\n",
4336 CUPS_LLCAST filestats->st_size) < 0)
4337 return (0);
4338 if (httpPrintf(HTTP(con), "\r\n") < 0)
4339 return (0);
4340
4341 if (cupsdFlushHeader(con) < 0)
4342 return (0);
4343
4344 con->http.data_encoding = HTTP_ENCODING_LENGTH;
4345 con->http.data_remaining = filestats->st_size;
4346
4347 if (con->http.data_remaining <= INT_MAX)
4348 con->http._data_remaining = con->http.data_remaining;
4349 else
4350 con->http._data_remaining = INT_MAX;
4351
4352 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient,
4353 (cupsd_selfunc_t)cupsdWriteClient, con);
4354
4355 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] Sending file.", con->http.fd);
4356
4357 return (1);
4358 }
4359
4360
4361 /*
4362 * 'write_pipe()' - Flag that data is available on the CGI pipe.
4363 */
4364
4365 static void
4366 write_pipe(cupsd_client_t *con) /* I - Client connection */
4367 {
4368 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4369 "[Client %d] write_pipe CGI output on fd %d",
4370 con->http.fd, con->file);
4371
4372 con->file_ready = 1;
4373
4374 cupsdRemoveSelect(con->file);
4375 cupsdAddSelect(con->http.fd, NULL, (cupsd_selfunc_t)cupsdWriteClient, con);
4376
4377 cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] CGI data ready to be sent.",
4378 con->http.fd);
4379 }
4380
4381
4382 /*
4383 * End of "$Id$".
4384 */
Unnamed repository; edit this file 'description' to name the repository.