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[thirdparty/cups.git] / scheduler / client.c
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ef416fc2 1/*
2 * "$Id: client.c 4912 2006-01-10 21:43:56Z mike $"
3 *
4 * Client routines for the Common UNIX Printing System (CUPS) scheduler.
5 *
6 * Copyright 1997-2006 by Easy Software Products, all rights reserved.
7 *
8 * These coded instructions, statements, and computer programs are the
9 * property of Easy Software Products and are protected by Federal
10 * copyright law. Distribution and use rights are outlined in the file
11 * "LICENSE.txt" which should have been included with this file. If this
12 * file is missing or damaged please contact Easy Software Products
13 * at:
14 *
15 * Attn: CUPS Licensing Information
16 * Easy Software Products
17 * 44141 Airport View Drive, Suite 204
18 * Hollywood, Maryland 20636 USA
19 *
20 * Voice: (301) 373-9600
21 * EMail: cups-info@cups.org
22 * WWW: http://www.cups.org
23 *
24 * Contents:
25 *
26 * cupsdAcceptClient() - Accept a new client.
27 * cupsdCloseAllClients() - Close all remote clients immediately.
28 * cupsdCloseClient() - Close a remote client.
29 * cupsdEncryptClient() - Enable encryption for the client...
30 * cupsdIsCGI() - Is the resource a CGI script/program?
31 * cupsdReadClient() - Read data from a client.
32 * cupsdSendCommand() - Send output from a command via HTTP.
33 * cupsdSendError() - Send an error message via HTTP.
34 * cupsdSendFile() - Send a file via HTTP.
35 * cupsdSendHeader() - Send an HTTP request.
36 * cupsdUpdateCGI() - Read status messages from CGI scripts and programs.
37 * cupsdWriteClient() - Write data to a client as needed.
38 * check_if_modified() - Decode an "If-Modified-Since" line.
39 * get_cdsa_server_certs() - Convert a keychain name into the CFArrayRef
40 * required by SSLSetCertificate.
41 * get_file() - Get a filename and state info.
42 * install_conf_file() - Install a configuration file.
43 * is_path_absolute() - Is a path absolute and free of relative elements.
44 * pipe_command() - Pipe the output of a command to the remote client.
45 */
46
47/*
48 * Include necessary headers...
49 */
50
51#include <cups/http-private.h>
52#include "cupsd.h"
53
54#ifdef HAVE_CDSASSL
55# include <Security/Security.h>
56#endif /* HAVE_CDSASSL */
57
58
59/*
60 * Local functions...
61 */
62
63static int check_if_modified(cupsd_client_t *con,
64 struct stat *filestats);
65#ifdef HAVE_CDSASSL
66static CFArrayRef get_cdsa_server_certs(void);
67#endif /* HAVE_CDSASSL */
68static char *get_file(cupsd_client_t *con, struct stat *filestats,
69 char *filename, int len);
70static http_status_t install_conf_file(cupsd_client_t *con);
71static int is_path_absolute(const char *path);
72static int pipe_command(cupsd_client_t *con, int infile, int *outfile,
73 char *command, char *options, int root);
74
75
76/*
77 * 'cupsdAcceptClient()' - Accept a new client.
78 */
79
80void
81cupsdAcceptClient(cupsd_listener_t *lis)/* I - Listener socket */
82{
83 int i; /* Looping var */
84 int count; /* Count of connections on a host */
85 int val; /* Parameter value */
86 cupsd_client_t *con; /* New client pointer */
87 http_addrlist_t *addrlist, /* List of adddresses for host */
88 *addr; /* Current address */
89 socklen_t addrlen; /* Length of address */
90 char *hostname; /* Hostname for address */
91 http_addr_t temp; /* Temporary address variable */
92 static time_t last_dos = 0; /* Time of last DoS attack */
93
94
95 cupsdLogMessage(CUPSD_LOG_DEBUG2,
96 "cupsdAcceptClient(lis=%p) %d NumClients = %d",
97 lis, lis->fd, NumClients);
98
99 /*
100 * Make sure we don't have a full set of clients already...
101 */
102
103 if (NumClients == MaxClients)
104 return;
105
106 /*
107 * Get a pointer to the next available client...
108 */
109
110 con = Clients + NumClients;
111
112 memset(con, 0, sizeof(cupsd_client_t));
113 con->http.activity = time(NULL);
114 con->file = -1;
115 con->http.hostaddr = &(con->clientaddr);
116
117 /*
118 * Accept the client and get the remote address...
119 */
120
121 addrlen = sizeof(http_addr_t);
122
123 if ((con->http.fd = accept(lis->fd, (struct sockaddr *)con->http.hostaddr,
124 &addrlen)) < 0)
125 {
126 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to accept client connection - %s.",
127 strerror(errno));
128 return;
129 }
130
131#ifdef AF_INET6
132 if (lis->address.addr.sa_family == AF_INET6)
133 {
134 /*
135 * Save the connected port number...
136 */
137
138 con->http.hostaddr->ipv6.sin6_port = lis->address.ipv6.sin6_port;
139
140 /*
141 * Convert IPv4 over IPv6 addresses (::ffff:n.n.n.n) to IPv4 forms we
142 * can more easily use...
143 */
144
145 if (con->http.hostaddr->ipv6.sin6_addr.s6_addr32[0] == 0 &&
146 con->http.hostaddr->ipv6.sin6_addr.s6_addr32[1] == 0 &&
147 ntohl(con->http.hostaddr->ipv6.sin6_addr.s6_addr32[2]) == 0xffff)
148 con->http.hostaddr->ipv6.sin6_addr.s6_addr32[2] = 0;
149 }
150 else
151#endif /* AF_INET6 */
152 if (lis->address.addr.sa_family == AF_INET)
153 con->http.hostaddr->ipv4.sin_port = lis->address.ipv4.sin_port;
154
155 /*
156 * Check the number of clients on the same address...
157 */
158
159 for (i = 0, count = 0; i < NumClients; i ++)
160 if (httpAddrEqual(Clients[i].http.hostaddr, con->http.hostaddr))
161 {
162 count ++;
163 if (count >= MaxClientsPerHost)
164 break;
165 }
166
167 if (count >= MaxClientsPerHost)
168 {
169 if ((time(NULL) - last_dos) >= 60)
170 {
171 last_dos = time(NULL);
172 cupsdLogMessage(CUPSD_LOG_WARN,
173 "Possible DoS attack - more than %d clients connecting from %s!",
174 MaxClientsPerHost, Clients[i].http.hostname);
175 }
176
177#ifdef WIN32
178 closesocket(con->http.fd);
179#else
180 close(con->http.fd);
181#endif /* WIN32 */
182
183 return;
184 }
185
186 /*
187 * Get the hostname or format the IP address as needed...
188 */
189
190 if (httpAddrLocalhost(con->http.hostaddr))
191 {
192 /*
193 * Map accesses from the loopback interface to "localhost"...
194 */
195
196 strlcpy(con->http.hostname, "localhost", sizeof(con->http.hostname));
197 hostname = con->http.hostname;
198 }
199 else
200 {
201 /*
202 * Map accesses from the same host to the server name.
203 */
204
205 for (addr = ServerAddrs; addr; addr = addr->next)
206 if (httpAddrEqual(con->http.hostaddr, &(addr->addr)))
207 break;
208
209 if (addr)
210 {
211 strlcpy(con->http.hostname, ServerName, sizeof(con->http.hostname));
212 hostname = con->http.hostname;
213 }
214 else if (HostNameLookups)
215 hostname = httpAddrLookup(con->http.hostaddr, con->http.hostname,
216 sizeof(con->http.hostname));
217 else
218 {
219 hostname = NULL;
220 httpAddrString(con->http.hostaddr, con->http.hostname,
221 sizeof(con->http.hostname));
222 }
223 }
224
225 if (hostname == NULL && HostNameLookups == 2)
226 {
227 /*
228 * Can't have an unresolved IP address with double-lookups enabled...
229 */
230
231 cupsdLogMessage(CUPSD_LOG_DEBUG2,
232 "cupsdAcceptClient: Closing connection %d...",
233 con->http.fd);
234
235#ifdef WIN32
236 closesocket(con->http.fd);
237#else
238 close(con->http.fd);
239#endif /* WIN32 */
240
241 cupsdLogMessage(CUPSD_LOG_WARN,
242 "Name lookup failed - connection from %s closed!",
243 con->http.hostname);
244 return;
245 }
246
247 if (HostNameLookups == 2)
248 {
249 /*
250 * Do double lookups as needed...
251 */
252
253 if ((addrlist = httpAddrGetList(con->http.hostname, AF_UNSPEC, NULL)) != NULL)
254 {
255 /*
256 * See if the hostname maps to the same IP address...
257 */
258
259 for (addr = addrlist; addr; addr = addr->next)
260 if (httpAddrEqual(con->http.hostaddr, &(addr->addr)))
261 break;
262 }
263 else
264 addr = NULL;
265
266 httpAddrFreeList(addrlist);
267
268 if (!addr)
269 {
270 /*
271 * Can't have a hostname that doesn't resolve to the same IP address
272 * with double-lookups enabled...
273 */
274
275 cupsdLogMessage(CUPSD_LOG_DEBUG2,
276 "cupsdAcceptClient: Closing connection %d...",
277 con->http.fd);
278
279#ifdef WIN32
280 closesocket(con->http.fd);
281#else
282 close(con->http.fd);
283#endif /* WIN32 */
284
285 cupsdLogMessage(CUPSD_LOG_WARN,
286 "IP lookup failed - connection from %s closed!",
287 con->http.hostname);
288 return;
289 }
290 }
291
292#ifdef AF_INET6
293 if (con->http.hostaddr->addr.sa_family == AF_INET6)
294 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s:%d (IPv6)",
295 con->http.fd, con->http.hostname,
296 ntohs(con->http.hostaddr->ipv6.sin6_port));
297 else
298#endif /* AF_INET6 */
299#ifdef AF_LOCAL
300 if (con->http.hostaddr->addr.sa_family == AF_LOCAL)
301 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s (Domain)",
302 con->http.fd, con->http.hostname);
303 else
304#endif /* AF_LOCAL */
305 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s:%d (IPv4)",
306 con->http.fd, con->http.hostname,
307 ntohs(con->http.hostaddr->ipv4.sin_port));
308
309 /*
310 * Get the local address the client connected to...
311 */
312
313 addrlen = sizeof(temp);
314 if (getsockname(con->http.fd, (struct sockaddr *)&temp, &addrlen))
315 {
316 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to get local address - %s",
317 strerror(errno));
318
319 strcpy(con->servername, "localhost");
320 con->serverport = LocalPort;
321 }
322 else
323 {
324#ifdef AF_INET6
325 if (temp.addr.sa_family == AF_INET6)
326 {
327 httpAddrLookup(&temp, con->servername, sizeof(con->servername));
328 con->serverport = ntohs(lis->address.ipv6.sin6_port);
329 }
330 else
331#endif /* AF_INET6 */
332 if (temp.addr.sa_family == AF_INET)
333 {
334 httpAddrLookup(&temp, con->servername, sizeof(con->servername));
335 con->serverport = ntohs(lis->address.ipv4.sin_port);
336 }
337 else
338 {
339 strcpy(con->servername, "localhost");
340 con->serverport = LocalPort;
341 }
342 }
343
344 cupsdLogMessage(CUPSD_LOG_DEBUG2,
345 "cupsdAcceptClient: %d connected to server on %s:%d",
346 con->http.fd, con->servername, con->serverport);
347
348 /*
349 * Using TCP_NODELAY improves responsiveness, especially on systems
350 * with a slow loopback interface... Since we write large buffers
351 * when sending print files and requests, there shouldn't be any
352 * performance penalty for this...
353 */
354
355 val = 1;
356 setsockopt(con->http.fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
357
358 /*
359 * Close this file on all execs...
360 */
361
362 fcntl(con->http.fd, F_SETFD, fcntl(con->http.fd, F_GETFD) | FD_CLOEXEC);
363
364 /*
365 * Add the socket to the select() input mask.
366 */
367
368 cupsdLogMessage(CUPSD_LOG_DEBUG2,
369 "cupsdAcceptClient: Adding fd %d to InputSet...",
370 con->http.fd);
371 FD_SET(con->http.fd, InputSet);
372
373 NumClients ++;
374
375 /*
376 * Temporarily suspend accept()'s until we lose a client...
377 */
378
379 if (NumClients == MaxClients)
380 cupsdPauseListening();
381
382#ifdef HAVE_SSL
383 /*
384 * See if we are connecting on a secure port...
385 */
386
387 if (lis->encryption == HTTP_ENCRYPT_ALWAYS)
388 {
389 /*
390 * https connection; go secure...
391 */
392
393 con->http.encryption = HTTP_ENCRYPT_ALWAYS;
394
395 cupsdEncryptClient(con);
396 }
397 else
398 con->auto_ssl = 1;
399#endif /* HAVE_SSL */
400}
401
402
403/*
404 * 'cupsdCloseAllClients()' - Close all remote clients immediately.
405 */
406
407void
408cupsdCloseAllClients(void)
409{
410 while (NumClients > 0)
411 cupsdCloseClient(Clients);
412}
413
414
415/*
416 * 'cupsdCloseClient()' - Close a remote client.
417 */
418
419int /* O - 1 if partial close, 0 if fully closed */
420cupsdCloseClient(cupsd_client_t *con) /* I - Client to close */
421{
422 int partial; /* Do partial close for SSL? */
423#ifdef HAVE_LIBSSL
424 SSL_CTX *context; /* Context for encryption */
425 SSL *conn; /* Connection for encryption */
426 unsigned long error; /* Error code */
427#elif defined(HAVE_GNUTLS)
428 http_tls_t *conn; /* TLS connection information */
429 int error; /* Error code */
430 gnutls_certificate_server_credentials *credentials;
431 /* TLS credentials */
432#endif /* HAVE_LIBSSL */
433
434
435 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdCloseClient: %d", con->http.fd);
436
437 /*
438 * Flush pending writes before closing...
439 */
440
441 httpFlushWrite(HTTP(con));
442
443 partial = 0;
444
445#ifdef HAVE_SSL
446 /*
447 * Shutdown encryption as needed...
448 */
449
450 if (con->http.tls)
451 {
452 partial = 1;
453
454# ifdef HAVE_LIBSSL
455 conn = (SSL *)(con->http.tls);
456 context = SSL_get_SSL_CTX(conn);
457
458 switch (SSL_shutdown(conn))
459 {
460 case 1 :
461 cupsdLogMessage(CUPSD_LOG_INFO,
462 "cupsdCloseClient: SSL shutdown successful!");
463 break;
464 case -1 :
465 cupsdLogMessage(CUPSD_LOG_ERROR,
466 "cupsdCloseClient: Fatal error during SSL shutdown!");
467 default :
468 while ((error = ERR_get_error()) != 0)
469 cupsdLogMessage(CUPSD_LOG_ERROR, "cupsdCloseClient: %s",
470 ERR_error_string(error, NULL));
471 break;
472 }
473
474 SSL_CTX_free(context);
475 SSL_free(conn);
476
477# elif defined(HAVE_GNUTLS)
478 conn = (http_tls_t *)(con->http.tls);
479 credentials = (gnutls_certificate_server_credentials *)(conn->credentials);
480
481 error = gnutls_bye(conn->session, GNUTLS_SHUT_WR);
482 switch (error)
483 {
484 case GNUTLS_E_SUCCESS:
485 cupsdLogMessage(CUPSD_LOG_INFO,
486 "cupsdCloseClient: SSL shutdown successful!");
487 break;
488 default:
489 cupsdLogMessage(CUPSD_LOG_ERROR,
490 "cupsdCloseClient: %s", gnutls_strerror(error));
491 break;
492 }
493
494 gnutls_deinit(conn->session);
495 gnutls_certificate_free_credentials(*credentials);
496 free(credentials);
497 free(conn);
498
499# elif defined(HAVE_CDSASSL)
500 SSLClose((SSLContextRef)con->http.tls);
501 SSLDisposeContext((SSLContextRef)con->http.tls);
502# endif /* HAVE_LIBSSL */
503
504 con->http.tls = NULL;
505 }
506#endif /* HAVE_SSL */
507
508 if (con->pipe_pid != 0)
509 {
510 /*
511 * Stop any CGI process...
512 */
513
514 cupsdLogMessage(CUPSD_LOG_DEBUG2,
515 "cupsdCloseClient: %d Killing process ID %d...",
516 con->http.fd, con->pipe_pid);
517 cupsdEndProcess(con->pipe_pid, 1);
518 con->pipe_pid = 0;
519 }
520
521 if (con->file >= 0)
522 {
523 if (FD_ISSET(con->file, InputSet))
524 {
525 cupsdLogMessage(CUPSD_LOG_DEBUG2,
526 "cupsdCloseClient: %d Removing fd %d from InputSet...",
527 con->http.fd, con->file);
528 FD_CLR(con->file, InputSet);
529 }
530
531 cupsdLogMessage(CUPSD_LOG_DEBUG2,
532 "cupsdCloseClient: %d Closing data file %d.",
533 con->http.fd, con->file);
534
535 close(con->file);
536 con->file = -1;
537 }
538
539 /*
540 * Close the socket and clear the file from the input set for select()...
541 */
542
543 if (con->http.fd > 0)
544 {
545 if (partial)
546 {
547 /*
548 * Only do a partial close so that the encrypted client gets everything.
549 */
550
551 cupsdLogMessage(CUPSD_LOG_DEBUG2,
552 "cupsdCloseClient: Removing fd %d from OutputSet...",
553 con->http.fd);
554 shutdown(con->http.fd, 0);
555 FD_CLR(con->http.fd, OutputSet);
556 }
557 else
558 {
559 /*
560 * Shut the socket down fully...
561 */
562
563 cupsdLogMessage(CUPSD_LOG_DEBUG2,
564 "cupsdCloseClient: Removing fd %d from InputSet and OutputSet...",
565 con->http.fd);
566 close(con->http.fd);
567 FD_CLR(con->http.fd, InputSet);
568 FD_CLR(con->http.fd, OutputSet);
569 con->http.fd = -1;
570 }
571 }
572
573 if (!partial)
574 {
575 /*
576 * Free memory...
577 */
578
579 if (con->http.input_set)
580 free(con->http.input_set);
581
582 httpClearCookie(HTTP(con));
583
584 cupsdClearString(&con->filename);
585 cupsdClearString(&con->command);
586 cupsdClearString(&con->options);
587
588 if (con->request)
589 {
590 ippDelete(con->request);
591 con->request = NULL;
592 }
593
594 if (con->response)
595 {
596 ippDelete(con->response);
597 con->response = NULL;
598 }
599
600 if (con->language)
601 {
602 cupsLangFree(con->language);
603 con->language = NULL;
604 }
605
606 /*
607 * Re-enable new client connections if we are going back under the
608 * limit...
609 */
610
611 if (NumClients == MaxClients)
612 cupsdResumeListening();
613
614 /*
615 * Compact the list of clients as necessary...
616 */
617
618 NumClients --;
619
620 if (con < (Clients + NumClients))
621 memmove(con, con + 1, (Clients + NumClients - con) * sizeof(cupsd_client_t));
622 }
623
624 return (partial);
625}
626
627
628/*
629 * 'cupsdEncryptClient()' - Enable encryption for the client...
630 */
631
632int /* O - 1 on success, 0 on error */
633cupsdEncryptClient(cupsd_client_t *con) /* I - Client to encrypt */
634{
635#ifdef HAVE_LIBSSL
636 SSL_CTX *context; /* Context for encryption */
637 SSL *conn; /* Connection for encryption */
638 unsigned long error; /* Error code */
639
640
641 /*
642 * Create the SSL context and accept the connection...
643 */
644
645 context = SSL_CTX_new(SSLv23_server_method());
646
647 SSL_CTX_set_options(context, SSL_OP_NO_SSLv2); /* Only use SSLv3 or TLS */
648 SSL_CTX_use_PrivateKey_file(context, ServerKey, SSL_FILETYPE_PEM);
649 SSL_CTX_use_certificate_file(context, ServerCertificate, SSL_FILETYPE_PEM);
650
651 conn = SSL_new(context);
652
653 SSL_set_fd(conn, con->http.fd);
654 if (SSL_accept(conn) != 1)
655 {
656 cupsdLogMessage(CUPSD_LOG_ERROR,
657 "cupsdEncryptClient: Unable to encrypt connection from %s!",
658 con->http.hostname);
659
660 while ((error = ERR_get_error()) != 0)
661 cupsdLogMessage(CUPSD_LOG_ERROR, "cupsdEncryptClient: %s",
662 ERR_error_string(error, NULL));
663
664 SSL_CTX_free(context);
665 SSL_free(conn);
666 return (0);
667 }
668
669 cupsdLogMessage(CUPSD_LOG_DEBUG,
670 "cupsdEncryptClient: %d Connection from %s now encrypted.",
671 con->http.fd, con->http.hostname);
672
673 con->http.tls = conn;
674 return (1);
675
676#elif defined(HAVE_GNUTLS)
677 http_tls_t *conn; /* TLS session object */
678 int error; /* Error code */
679 gnutls_certificate_server_credentials *credentials;
680 /* TLS credentials */
681
682 /*
683 * Create the SSL object and perform the SSL handshake...
684 */
685
686 conn = (http_tls_t *)malloc(sizeof(gnutls_session));
687
688 if (conn == NULL)
689 return (0);
690
691 credentials = (gnutls_certificate_server_credentials *)
692 malloc(sizeof(gnutls_certificate_server_credentials));
693 if (credentials == NULL)
694 {
695 cupsdLogMessage(CUPSD_LOG_ERROR,
696 "cupsdEncryptClient: Unable to encrypt connection from %s!",
697 con->http.hostname);
698 cupsdLogMessage(CUPSD_LOG_ERROR, "cupsdEncryptClient: %s", strerror(errno));
699
700 free(conn);
701 return (0);
702 }
703
704 gnutls_certificate_allocate_credentials(credentials);
705 gnutls_certificate_set_x509_key_file(*credentials, ServerCertificate,
706 ServerKey, GNUTLS_X509_FMT_PEM);
707
708 gnutls_init(&(conn->session), GNUTLS_SERVER);
709 gnutls_set_default_priority(conn->session);
710 gnutls_credentials_set(conn->session, GNUTLS_CRD_CERTIFICATE, *credentials);
711 gnutls_transport_set_ptr(conn->session, con->http.fd);
712
713 error = gnutls_handshake(conn->session);
714
715 if (error != GNUTLS_E_SUCCESS)
716 {
717 cupsdLogMessage(CUPSD_LOG_ERROR,
718 "cupsdEncryptClient: Unable to encrypt connection from %s!",
719 con->http.hostname);
720 cupsdLogMessage(CUPSD_LOG_ERROR, "cupsdEncryptClient: %s",
721 gnutls_strerror(error));
722
723 gnutls_deinit(conn->session);
724 gnutls_certificate_free_credentials(*credentials);
725 free(conn);
726 free(credentials);
727 return (0);
728 }
729
730 cupsdLogMessage(CUPSD_LOG_DEBUG,
731 "cupsdEncryptClient: %d Connection from %s now encrypted.",
732 con->http.fd, con->http.hostname);
733
734 conn->credentials = credentials;
735 con->http.tls = conn;
736 return (1);
737
738#elif defined(HAVE_CDSASSL)
739 OSStatus error; /* Error info */
740 SSLContextRef conn; /* New connection */
741 int allowExpired; /* Allow expired certificates? */
742 int allowAnyRoot; /* Allow any root certificate? */
743
744
745 conn = NULL;
746 error = SSLNewContext(true, &conn);
747 allowExpired = 1;
748 allowAnyRoot = 1;
749
750 if (!ServerCertificatesArray)
751 ServerCertificatesArray = get_cdsa_server_certs();
752
753 if (!ServerCertificatesArray)
754 {
755 cupsdLogMessage(CUPSD_LOG_ERROR,
756 "EncryptClient: Could not find signing key in keychain "
757 "\"%s\"", ServerCertificate);
758 error = errSSLBadConfiguration;
759 }
760
761 if (!error)
762 error = SSLSetIOFuncs(conn, _httpReadCDSA, _httpWriteCDSA);
763
764 if (!error)
765 error = SSLSetProtocolVersion(conn, kSSLProtocol3);
766
767 if (!error)
768 error = SSLSetConnection(conn, (SSLConnectionRef)con->http.fd);
769
770 if (!error)
771 error = SSLSetPeerDomainName(conn, ServerName, strlen(ServerName) + 1);
772
773 /* have to do these options before setting server certs */
774 if (!error && allowExpired)
775 error = SSLSetAllowsExpiredCerts(conn, true);
776
777 if (!error && allowAnyRoot)
778 error = SSLSetAllowsAnyRoot(conn, true);
779
780 if (!error && ServerCertificatesArray)
781 error = SSLSetCertificate(conn, ServerCertificatesArray);
782
783 /*
784 * Perform SSL/TLS handshake
785 */
786
787 do
788 {
789 error = SSLHandshake(conn);
790 }
791 while (error == errSSLWouldBlock);
792
793 if (error)
794 {
795 cupsdLogMessage(CUPSD_LOG_ERROR,
796 "cupsdEncryptClient: Unable to encrypt connection from %s!",
797 con->http.hostname);
798
799 cupsdLogMessage(CUPSD_LOG_ERROR,
800 "cupsdEncryptClient: CDSA error code is %d", (int)error);
801
802 con->http.error = error;
803 con->http.status = HTTP_ERROR;
804
805 if (conn != NULL)
806 SSLDisposeContext(conn);
807
808 return (0);
809 }
810
811 cupsdLogMessage(CUPSD_LOG_DEBUG,
812 "cupsdEncryptClient: %d Connection from %s now encrypted.",
813 con->http.fd, con->http.hostname);
814
815 con->http.tls = conn;
816 return (1);
817
818#else
819 return (0);
820#endif /* HAVE_LIBSSL */
821}
822
823
824/*
825 * 'cupsdIsCGI()' - Is the resource a CGI script/program?
826 */
827
828int /* O - 1 = CGI, 0 = file */
829cupsdIsCGI(cupsd_client_t *con, /* I - Client connection */
830 const char *filename, /* I - Real filename */
831 struct stat *filestats, /* I - File information */
832 mime_type_t *type) /* I - MIME type */
833{
834 const char *options; /* Options on URL */
835
836
837 cupsdLogMessage(CUPSD_LOG_DEBUG2,
838 "cupsdIsCGI(con=%p, filename=\"%s\", filestats=%p, type=%s/%s)\n",
839 con, filename, filestats, type ? type->super : "unknown",
840 type ? type->type : "unknown");
841
842 /*
843 * Get the options, if any...
844 */
845
846 if ((options = strchr(con->uri, '?')) != NULL)
847 options ++;
848
849 /*
850 * Check for known types...
851 */
852
853 if (!type || strcasecmp(type->super, "application"))
854 {
855 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdIsCGI: Returning 0...");
856 return (0);
857 }
858
859 if (!strcasecmp(type->type, "x-httpd-cgi") &&
860 (filestats->st_mode & 0111))
861 {
862 /*
863 * "application/x-httpd-cgi" is a CGI script.
864 */
865
866 cupsdSetString(&con->command, filename);
867
868 filename = strrchr(filename, '/') + 1; /* Filename always absolute */
869
870 if (options)
871 cupsdSetStringf(&con->options, "%s %s", filename, options);
872 else
873 cupsdSetStringf(&con->options, "%s", filename);
874
875 cupsdLogMessage(CUPSD_LOG_DEBUG2,
876 "cupsdIsCGI: Returning 1 with command=\"%s\" and options=\"%s\"",
877 con->command, con->options);
878
879 return (1);
880 }
881#ifdef HAVE_JAVA
882 else if (!strcasecmp(type->type, "x-httpd-java"))
883 {
884 /*
885 * "application/x-httpd-java" is a Java servlet.
886 */
887
888 cupsdSetString(&con->command, CUPS_JAVA);
889
890 if (options)
891 cupsdSetStringf(&con->options, "java %s %s", filename, options);
892 else
893 cupsdSetStringf(&con->options, "java %s", filename);
894
895 cupsdLogMessage(CUPSD_LOG_DEBUG2,
896 "cupsdIsCGI: Returning 1 with command=\"%s\" and options=\"%s\"",
897 con->command, con->options);
898
899 return (1);
900 }
901#endif /* HAVE_JAVA */
902#ifdef HAVE_PERL
903 else if (!strcasecmp(type->type, "x-httpd-perl"))
904 {
905 /*
906 * "application/x-httpd-perl" is a Perl page.
907 */
908
909 cupsdSetString(&con->command, CUPS_PERL);
910
911 if (options)
912 cupsdSetStringf(&con->options, "perl %s %s", filename, options);
913 else
914 cupsdSetStringf(&con->options, "perl %s", filename);
915
916 cupsdLogMessage(CUPSD_LOG_DEBUG2,
917 "cupsdIsCGI: Returning 1 with command=\"%s\" and options=\"%s\"",
918 con->command, con->options);
919
920 return (1);
921 }
922#endif /* HAVE_PERL */
923#ifdef HAVE_PHP
924 else if (!strcasecmp(type->type, "x-httpd-php"))
925 {
926 /*
927 * "application/x-httpd-php" is a PHP page.
928 */
929
930 cupsdSetString(&con->command, CUPS_PHP);
931
932 if (options)
933 cupsdSetStringf(&con->options, "php %s %s", filename, options);
934 else
935 cupsdSetStringf(&con->options, "php %s", filename);
936
937 cupsdLogMessage(CUPSD_LOG_DEBUG2,
938 "cupsdIsCGI: Returning 1 with command=\"%s\" and options=\"%s\"",
939 con->command, con->options);
940
941 return (1);
942 }
943#endif /* HAVE_PHP */
944#ifdef HAVE_PYTHON
945 else if (!strcasecmp(type->type, "x-httpd-python"))
946 {
947 /*
948 * "application/x-httpd-python" is a Python page.
949 */
950
951 cupsdSetString(&con->command, CUPS_PYTHON);
952
953 if (options)
954 cupsdSetStringf(&con->options, "python %s %s", filename, options);
955 else
956 cupsdSetStringf(&con->options, "python %s", filename);
957
958 cupsdLogMessage(CUPSD_LOG_DEBUG2,
959 "cupsdIsCGI: Returning 1 with command=\"%s\" and options=\"%s\"",
960 con->command, con->options);
961
962 return (1);
963 }
964#endif /* HAVE_PYTHON */
965
966 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdIsCGI: Returning 0...");
967
968 return (0);
969}
970
971
972/*
973 * 'cupsdReadClient()' - Read data from a client.
974 */
975
976int /* O - 1 on success, 0 on error */
977cupsdReadClient(cupsd_client_t *con) /* I - Client to read from */
978{
979 char line[32768], /* Line from client... */
980 operation[64], /* Operation code from socket */
981 version[64], /* HTTP version number string */
982 locale[64], /* Locale */
983 *ptr; /* Pointer into strings */
984 int major, minor; /* HTTP version numbers */
985 http_status_t status; /* Transfer status */
986 ipp_state_t ipp_state; /* State of IPP transfer */
987 int bytes; /* Number of bytes to POST */
988 char *filename; /* Name of file for GET/HEAD */
989 char buf[1024]; /* Buffer for real filename */
990 struct stat filestats; /* File information */
991 mime_type_t *type; /* MIME type of file */
992 cupsd_printer_t *p; /* Printer */
993 static unsigned request_id = 0; /* Request ID for temp files */
994
995
996 status = HTTP_CONTINUE;
997
998 cupsdLogMessage(CUPSD_LOG_DEBUG2,
999 "cupsdReadClient: %d, used=%d, file=%d state=%d",
1000 con->http.fd, con->http.used, con->file, con->http.state);
1001
1002 if (con->http.error)
1003 {
1004 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdReadClient: http error seen...");
1005 return (cupsdCloseClient(con));
1006 }
1007
1008#ifdef HAVE_SSL
1009 if (con->auto_ssl)
1010 {
1011 /*
1012 * Automatically check for a SSL/TLS handshake...
1013 */
1014
1015 con->auto_ssl = 0;
1016
1017 if (recv(con->http.fd, buf, 1, MSG_PEEK) == 1 &&
1018 (!buf[0] || !strchr("DGHOPT", buf[0])))
1019 {
1020 /*
1021 * Encrypt this connection...
1022 */
1023
1024 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1025 "cupsdReadClient: Saw first byte %02X, auto-negotiating SSL/TLS session...",
1026 buf[0] & 255);
1027
1028 cupsdEncryptClient(con);
1029 return (1);
1030 }
1031 }
1032#endif /* HAVE_SSL */
1033
1034 switch (con->http.state)
1035 {
1036 case HTTP_WAITING :
1037 /*
1038 * See if we've received a request line...
1039 */
1040
1041 if (httpGets(line, sizeof(line) - 1, HTTP(con)) == NULL)
1042 {
1043 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1044 "cupsdReadClient: httpGets returned EOF...");
1045 return (cupsdCloseClient(con));
1046 }
1047
1048 /*
1049 * Ignore blank request lines...
1050 */
1051
1052 if (line[0] == '\0')
1053 break;
1054
1055 /*
1056 * Clear other state variables...
1057 */
1058
1059 httpClearFields(HTTP(con));
1060
1061 con->http.activity = time(NULL);
1062 con->http.version = HTTP_1_0;
1063 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1064 con->http.data_encoding = HTTP_ENCODE_LENGTH;
1065 con->http.data_remaining = 0;
1066 con->http._data_remaining = 0;
1067 con->operation = HTTP_WAITING;
1068 con->bytes = 0;
1069 con->file = -1;
1070 con->file_ready = 0;
1071 con->pipe_pid = 0;
1072 con->username[0] = '\0';
1073 con->password[0] = '\0';
1074 con->uri[0] = '\0';
1075
1076 cupsdClearString(&con->command);
1077 cupsdClearString(&con->options);
1078
1079 if (con->language != NULL)
1080 {
1081 cupsLangFree(con->language);
1082 con->language = NULL;
1083 }
1084
1085 /*
1086 * Grab the request line...
1087 */
1088
1089 switch (sscanf(line, "%63s%1023s%63s", operation, con->uri, version))
1090 {
1091 case 1 :
1092 cupsdLogMessage(CUPSD_LOG_ERROR,
1093 "Bad request line \"%s\" from %s!", line,
1094 con->http.hostname);
1095 cupsdSendError(con, HTTP_BAD_REQUEST);
1096 return (cupsdCloseClient(con));
1097 case 2 :
1098 con->http.version = HTTP_0_9;
1099 break;
1100 case 3 :
1101 if (sscanf(version, "HTTP/%d.%d", &major, &minor) != 2)
1102 {
1103 cupsdLogMessage(CUPSD_LOG_ERROR,
1104 "Bad request line \"%s\" from %s!", line,
1105 con->http.hostname);
1106 cupsdSendError(con, HTTP_BAD_REQUEST);
1107 return (cupsdCloseClient(con));
1108 }
1109
1110 if (major < 2)
1111 {
1112 con->http.version = (http_version_t)(major * 100 + minor);
1113 if (con->http.version == HTTP_1_1 && KeepAlive)
1114 con->http.keep_alive = HTTP_KEEPALIVE_ON;
1115 else
1116 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1117 }
1118 else
1119 {
1120 cupsdSendError(con, HTTP_NOT_SUPPORTED);
1121 return (cupsdCloseClient(con));
1122 }
1123 break;
1124 }
1125
1126 /*
1127 * Handle full URLs in the request line...
1128 */
1129
1130 if (strcmp(con->uri, "*"))
1131 {
1132 char method[HTTP_MAX_URI], /* Method/scheme */
1133 userpass[HTTP_MAX_URI], /* Username:password */
1134 hostname[HTTP_MAX_URI], /* Hostname */
1135 resource[HTTP_MAX_URI]; /* Resource path */
1136 int port; /* Port number */
1137
1138
1139 /*
1140 * Separate the URI into its components...
1141 */
1142
1143 httpSeparateURI(con->uri, method, sizeof(method),
1144 userpass, sizeof(userpass),
1145 hostname, sizeof(hostname), &port,
1146 resource, sizeof(resource));
1147
1148 /*
1149 * Only allow URIs with the servername, localhost, or an IP
1150 * address...
1151 */
1152
1153 if (strcmp(method, "file") &&
1154 strcasecmp(hostname, ServerName) &&
1155 strcasecmp(hostname, "localhost") &&
1156 !isdigit(hostname[0]))
1157 {
1158 /*
1159 * Nope, we don't do proxies...
1160 */
1161
1162 cupsdLogMessage(CUPSD_LOG_ERROR, "Bad URI \"%s\" in request!",
1163 con->uri);
1164 cupsdSendError(con, HTTP_METHOD_NOT_ALLOWED);
1165 return (cupsdCloseClient(con));
1166 }
1167
1168 /*
1169 * Copy the resource portion back into the URI; both resource and
1170 * con->uri are HTTP_MAX_URI bytes in size...
1171 */
1172
1173 strcpy(con->uri, resource);
1174 }
1175
1176 /*
1177 * Process the request...
1178 */
1179
1180 if (!strcmp(operation, "GET"))
1181 con->http.state = HTTP_GET;
1182 else if (!strcmp(operation, "PUT"))
1183 con->http.state = HTTP_PUT;
1184 else if (!strcmp(operation, "POST"))
1185 con->http.state = HTTP_POST;
1186 else if (!strcmp(operation, "DELETE"))
1187 con->http.state = HTTP_DELETE;
1188 else if (!strcmp(operation, "TRACE"))
1189 con->http.state = HTTP_TRACE;
1190 else if (!strcmp(operation, "OPTIONS"))
1191 con->http.state = HTTP_OPTIONS;
1192 else if (!strcmp(operation, "HEAD"))
1193 con->http.state = HTTP_HEAD;
1194 else
1195 {
1196 cupsdLogMessage(CUPSD_LOG_ERROR, "Bad operation \"%s\"!", operation);
1197 cupsdSendError(con, HTTP_BAD_REQUEST);
1198 return (cupsdCloseClient(con));
1199 }
1200
1201 con->start = time(NULL);
1202 con->operation = con->http.state;
1203
1204 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdReadClient: %d %s %s HTTP/%d.%d", con->http.fd,
1205 operation, con->uri,
1206 con->http.version / 100, con->http.version % 100);
1207
1208 con->http.status = HTTP_OK;
1209
1210 case HTTP_OPTIONS :
1211 case HTTP_DELETE :
1212 case HTTP_GET :
1213 case HTTP_HEAD :
1214 case HTTP_POST :
1215 case HTTP_PUT :
1216 case HTTP_TRACE :
1217 /*
1218 * Parse incoming parameters until the status changes...
1219 */
1220
1221 status = httpUpdate(HTTP(con));
1222
1223 if (status != HTTP_OK && status != HTTP_CONTINUE)
1224 {
1225 cupsdSendError(con, HTTP_BAD_REQUEST);
1226 return (cupsdCloseClient(con));
1227 }
1228 break;
1229
1230 default :
1231 break; /* Anti-compiler-warning-code */
1232 }
1233
1234 /*
1235 * Handle new transfers...
1236 */
1237
1238 if (status == HTTP_OK)
1239 {
1240 if (con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE][0])
1241 {
1242 /*
1243 * Figure out the locale from the Accept-Language and Content-Type
1244 * fields...
1245 */
1246
1247 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], ',')) != NULL)
1248 *ptr = '\0';
1249
1250 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], ';')) != NULL)
1251 *ptr = '\0';
1252
1253 if ((ptr = strstr(con->http.fields[HTTP_FIELD_CONTENT_TYPE], "charset=")) != NULL)
1254 {
1255 /*
1256 * Combine language and charset, and trim any extra params in the
1257 * content-type.
1258 */
1259
1260 snprintf(locale, sizeof(locale), "%s.%s",
1261 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], ptr + 8);
1262
1263 if ((ptr = strchr(locale, ',')) != NULL)
1264 *ptr = '\0';
1265 }
1266 else
1267 snprintf(locale, sizeof(locale), "%s.%s",
1268 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], DefaultCharset);
1269
1270 con->language = cupsLangGet(locale);
1271 }
1272 else
1273 con->language = cupsLangGet(DefaultLocale);
1274
1275 cupsdAuthorize(con);
1276
1277 if (!strncmp(con->http.fields[HTTP_FIELD_CONNECTION], "Keep-Alive", 10) &&
1278 KeepAlive)
1279 con->http.keep_alive = HTTP_KEEPALIVE_ON;
1280
1281 if (!con->http.fields[HTTP_FIELD_HOST][0] &&
1282 con->http.version >= HTTP_1_1)
1283 {
1284 /*
1285 * HTTP/1.1 and higher require the "Host:" field...
1286 */
1287
1288 if (!cupsdSendError(con, HTTP_BAD_REQUEST))
1289 return (cupsdCloseClient(con));
1290 }
1291 else if (con->operation == HTTP_OPTIONS)
1292 {
1293 /*
1294 * Do OPTIONS command...
1295 */
1296
1297 if (con->best && con->best->type != AUTH_NONE)
1298 {
1299 if (!cupsdSendHeader(con, HTTP_UNAUTHORIZED, NULL))
1300 return (cupsdCloseClient(con));
1301 }
1302
1303 if (!strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Upgrade") &&
1304 con->http.tls == NULL)
1305 {
1306#ifdef HAVE_SSL
1307 /*
1308 * Do encryption stuff...
1309 */
1310
1311 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL))
1312 return (cupsdCloseClient(con));
1313
1314 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1315 httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n");
1316 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1317 httpPrintf(HTTP(con), "\r\n");
1318
1319 cupsdEncryptClient(con);
1320#else
1321 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED))
1322 return (cupsdCloseClient(con));
1323#endif /* HAVE_SSL */
1324 }
1325
1326 if (con->http.expect)
1327 {
1328 /**** TODO: send expected header ****/
1329 }
1330
1331 if (!cupsdSendHeader(con, HTTP_OK, NULL))
1332 return (cupsdCloseClient(con));
1333
1334 httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST, PUT\r\n");
1335 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1336 httpPrintf(HTTP(con), "\r\n");
1337 }
1338 else if (!is_path_absolute(con->uri))
1339 {
1340 /*
1341 * Protect against malicious users!
1342 */
1343
1344 if (!cupsdSendError(con, HTTP_FORBIDDEN))
1345 return (cupsdCloseClient(con));
1346 }
1347 else
1348 {
1349 if (!strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Upgrade") &&
1350 con->http.tls == NULL)
1351 {
1352#ifdef HAVE_SSL
1353 /*
1354 * Do encryption stuff...
1355 */
1356
1357 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL))
1358 return (cupsdCloseClient(con));
1359
1360 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1361 httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n");
1362 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1363 httpPrintf(HTTP(con), "\r\n");
1364
1365 cupsdEncryptClient(con);
1366#else
1367 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED))
1368 return (cupsdCloseClient(con));
1369#endif /* HAVE_SSL */
1370 }
1371
1372 if ((status = cupsdIsAuthorized(con, NULL)) != HTTP_OK)
1373 {
1374 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1375 "cupsdReadClient: Unauthorized request for %s...\n",
1376 con->uri);
1377 cupsdSendError(con, status);
1378 return (cupsdCloseClient(con));
1379 }
1380
1381 if (con->http.expect)
1382 {
1383 /**** TODO: send expected header ****/
1384 }
1385
1386 switch (con->http.state)
1387 {
1388 case HTTP_GET_SEND :
1389 if (!strncmp(con->uri, "/printers/", 10) &&
1390 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1391 {
1392 /*
1393 * Send PPD file - get the real printer name since printer
1394 * names are not case sensitive but filenames can be...
1395 */
1396
1397 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1398
1399 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1400 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1401 else
1402 {
1403 if (!cupsdSendError(con, HTTP_NOT_FOUND))
1404 return (cupsdCloseClient(con));
1405
1406 break;
1407 }
1408 }
1409
1410 if ((!strncmp(con->uri, "/admin", 6) &&
1411 strncmp(con->uri, "/admin/conf/", 12) &&
1412 strncmp(con->uri, "/admin/log/", 11)) ||
1413 !strncmp(con->uri, "/printers", 9) ||
1414 !strncmp(con->uri, "/classes", 8) ||
1415 !strncmp(con->uri, "/help", 5) ||
1416 !strncmp(con->uri, "/jobs", 5))
1417 {
1418 /*
1419 * Send CGI output...
1420 */
1421
1422 if (!strncmp(con->uri, "/admin", 6))
1423 {
1424 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1425 ServerBin);
1426
1427 if ((ptr = strchr(con->uri + 6, '?')) != NULL)
1428 cupsdSetStringf(&con->options, "admin%s", ptr);
1429 else
1430 cupsdSetString(&con->options, "admin");
1431 }
1432 else if (!strncmp(con->uri, "/printers", 9))
1433 {
1434 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1435 ServerBin);
1436 cupsdSetString(&con->options, con->uri + 9);
1437 }
1438 else if (!strncmp(con->uri, "/classes", 8))
1439 {
1440 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1441 ServerBin);
1442 cupsdSetString(&con->options, con->uri + 8);
1443 }
1444 else if (!strncmp(con->uri, "/jobs", 5))
1445 {
1446 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1447 ServerBin);
1448 cupsdSetString(&con->options, con->uri + 5);
1449 }
1450 else
1451 {
1452 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1453 ServerBin);
1454 cupsdSetString(&con->options, con->uri + 5);
1455 }
1456
1457 if (con->options[0] == '/')
1458 _cups_strcpy(con->options, con->options + 1);
1459
1460 if (!cupsdSendCommand(con, con->command, con->options, 0))
1461 {
1462 if (!cupsdSendError(con, HTTP_NOT_FOUND))
1463 return (cupsdCloseClient(con));
1464 }
1465 else
1466 cupsdLogRequest(con, HTTP_OK);
1467
1468 if (con->http.version <= HTTP_1_0)
1469 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1470 }
1471 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1472 (strchr(con->uri + 12, '/') ||
1473 strlen(con->uri) == 12)) ||
1474 (!strncmp(con->uri, "/admin/log/", 11) &&
1475 (strchr(con->uri + 11, '/') ||
1476 strlen(con->uri) == 11)))
1477 {
1478 /*
1479 * GET can only be done to configuration files under
1480 * /admin/conf...
1481 */
1482
1483 if (!cupsdSendError(con, HTTP_FORBIDDEN))
1484 return (cupsdCloseClient(con));
1485
1486 break;
1487 }
1488 else
1489 {
1490 /*
1491 * Serve a file...
1492 */
1493
1494 if ((filename = get_file(con, &filestats, buf,
1495 sizeof(buf))) == NULL)
1496 {
1497 if (!cupsdSendError(con, HTTP_NOT_FOUND))
1498 return (cupsdCloseClient(con));
1499
1500 break;
1501 }
1502
1503 type = mimeFileType(MimeDatabase, filename, NULL);
1504
1505 if (cupsdIsCGI(con, filename, &filestats, type))
1506 {
1507 /*
1508 * Note: con->command and con->options were set by
1509 * cupsdIsCGI()...
1510 */
1511
1512 if (!cupsdSendCommand(con, con->command, con->options, 0))
1513 {
1514 if (!cupsdSendError(con, HTTP_NOT_FOUND))
1515 return (cupsdCloseClient(con));
1516 }
1517 else
1518 cupsdLogRequest(con, HTTP_OK);
1519
1520 if (con->http.version <= HTTP_1_0)
1521 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1522 break;
1523 }
1524
1525 if (!check_if_modified(con, &filestats))
1526 {
1527 if (!cupsdSendError(con, HTTP_NOT_MODIFIED))
1528 return (cupsdCloseClient(con));
1529 }
1530 else
1531 {
1532 if (type == NULL)
1533 strcpy(line, "text/plain");
1534 else
1535 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1536
1537 if (!cupsdSendFile(con, HTTP_OK, filename, line, &filestats))
1538 return (cupsdCloseClient(con));
1539 }
1540 }
1541 break;
1542
1543 case HTTP_POST_RECV :
1544 /*
1545 * See if the POST request includes a Content-Length field, and if
1546 * so check the length against any limits that are set...
1547 */
1548
1549 cupsdLogMessage(CUPSD_LOG_DEBUG2, "POST %s", con->uri);
1550 cupsdLogMessage(CUPSD_LOG_DEBUG2, "CONTENT_TYPE = %s",
1551 con->http.fields[HTTP_FIELD_CONTENT_TYPE]);
1552
1553 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1554 MaxRequestSize > 0 &&
1555 con->http.data_remaining > MaxRequestSize)
1556 {
1557 /*
1558 * Request too large...
1559 */
1560
1561 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
1562 return (cupsdCloseClient(con));
1563
1564 break;
1565 }
1566 else if (con->http.data_remaining < 0)
1567 {
1568 /*
1569 * Negative content lengths are invalid!
1570 */
1571
1572 if (!cupsdSendError(con, HTTP_BAD_REQUEST))
1573 return (cupsdCloseClient(con));
1574
1575 break;
1576 }
1577
1578 /*
1579 * See what kind of POST request this is; for IPP requests the
1580 * content-type field will be "application/ipp"...
1581 */
1582
1583 if (!strcmp(con->http.fields[HTTP_FIELD_CONTENT_TYPE],
1584 "application/ipp"))
1585 con->request = ippNew();
1586 else if ((!strncmp(con->uri, "/admin", 6) &&
1587 strncmp(con->uri, "/admin/conf/", 12) &&
1588 strncmp(con->uri, "/admin/log/", 11)) ||
1589 !strncmp(con->uri, "/printers", 9) ||
1590 !strncmp(con->uri, "/classes", 8) ||
1591 !strncmp(con->uri, "/help", 5) ||
1592 !strncmp(con->uri, "/jobs", 5))
1593 {
1594 /*
1595 * CGI request...
1596 */
1597
1598 if (!strncmp(con->uri, "/admin", 6))
1599 {
1600 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1601 ServerBin);
1602
1603 if ((ptr = strchr(con->uri + 6, '?')) != NULL)
1604 cupsdSetStringf(&con->options, "admin%s", ptr);
1605 else
1606 cupsdSetString(&con->options, "admin");
1607 }
1608 else if (!strncmp(con->uri, "/printers", 9))
1609 {
1610 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1611 ServerBin);
1612 cupsdSetString(&con->options, con->uri + 9);
1613 }
1614 else if (!strncmp(con->uri, "/classes", 8))
1615 {
1616 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1617 ServerBin);
1618 cupsdSetString(&con->options, con->uri + 8);
1619 }
1620 else if (!strncmp(con->uri, "/jobs", 5))
1621 {
1622 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1623 ServerBin);
1624 cupsdSetString(&con->options, con->uri + 5);
1625 }
1626 else
1627 {
1628 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1629 ServerBin);
1630 cupsdSetString(&con->options, con->uri + 5);
1631 }
1632
1633 if (con->options[0] == '/')
1634 _cups_strcpy(con->options, con->options + 1);
1635
1636 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1637 "cupsdReadClient: %d command=\"%s\", options = \"%s\"",
1638 con->http.fd, con->command, con->options);
1639
1640 if (con->http.version <= HTTP_1_0)
1641 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1642 }
1643 else
1644 {
1645 /*
1646 * POST to a file...
1647 */
1648
1649 if ((filename = get_file(con, &filestats, buf,
1650 sizeof(buf))) == NULL)
1651 {
1652 if (!cupsdSendError(con, HTTP_NOT_FOUND))
1653 return (cupsdCloseClient(con));
1654
1655 break;
1656 }
1657
1658 type = mimeFileType(MimeDatabase, filename, NULL);
1659
1660 if (!cupsdIsCGI(con, filename, &filestats, type))
1661 {
1662 /*
1663 * Only POST to CGI's...
1664 */
1665
1666 if (!cupsdSendError(con, HTTP_UNAUTHORIZED))
1667 return (cupsdCloseClient(con));
1668 }
1669 }
1670 break;
1671
1672 case HTTP_PUT_RECV :
1673 /*
1674 * Validate the resource name...
1675 */
1676
1677 if (strncmp(con->uri, "/admin/conf/", 12) ||
1678 strchr(con->uri + 12, '/') ||
1679 strlen(con->uri) == 12)
1680 {
1681 /*
1682 * PUT can only be done to configuration files under
1683 * /admin/conf...
1684 */
1685
1686 if (!cupsdSendError(con, HTTP_FORBIDDEN))
1687 return (cupsdCloseClient(con));
1688
1689 break;
1690 }
1691
1692 /*
1693 * See if the PUT request includes a Content-Length field, and if
1694 * so check the length against any limits that are set...
1695 */
1696
1697 cupsdLogMessage(CUPSD_LOG_DEBUG2, "PUT %s", con->uri);
1698 cupsdLogMessage(CUPSD_LOG_DEBUG2, "CONTENT_TYPE = %s",
1699 con->http.fields[HTTP_FIELD_CONTENT_TYPE]);
1700
1701 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1702 MaxRequestSize > 0 &&
1703 con->http.data_remaining > MaxRequestSize)
1704 {
1705 /*
1706 * Request too large...
1707 */
1708
1709 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
1710 return (cupsdCloseClient(con));
1711
1712 break;
1713 }
1714 else if (con->http.data_remaining < 0)
1715 {
1716 /*
1717 * Negative content lengths are invalid!
1718 */
1719
1720 if (!cupsdSendError(con, HTTP_BAD_REQUEST))
1721 return (cupsdCloseClient(con));
1722
1723 break;
1724 }
1725
1726 /*
1727 * Open a temporary file to hold the request...
1728 */
1729
1730 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot,
1731 request_id ++);
1732 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
1733
1734 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1735 "cupsdReadClient: %d REQUEST %s=%d", con->http.fd,
1736 con->filename, con->file);
1737
1738 if (con->file < 0)
1739 {
1740 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
1741 return (cupsdCloseClient(con));
1742 }
1743
1744 fchmod(con->file, 0640);
1745 fchown(con->file, RunUser, Group);
1746 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
1747 break;
1748
1749 case HTTP_DELETE :
1750 case HTTP_TRACE :
1751 cupsdSendError(con, HTTP_NOT_IMPLEMENTED);
1752 return (cupsdCloseClient(con));
1753
1754 case HTTP_HEAD :
1755 if (!strncmp(con->uri, "/printers/", 10) &&
1756 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1757 {
1758 /*
1759 * Send PPD file - get the real printer name since printer
1760 * names are not case sensitive but filenames can be...
1761 */
1762
1763 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1764
1765 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1766 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1767 else
1768 {
1769 if (!cupsdSendError(con, HTTP_NOT_FOUND))
1770 return (cupsdCloseClient(con));
1771
1772 break;
1773 }
1774 }
1775
1776 if ((!strncmp(con->uri, "/admin", 6) &&
1777 strncmp(con->uri, "/admin/conf/", 12) &&
1778 strncmp(con->uri, "/admin/log/", 11)) ||
1779 !strncmp(con->uri, "/printers", 9) ||
1780 !strncmp(con->uri, "/classes", 8) ||
1781 !strncmp(con->uri, "/help", 5) ||
1782 !strncmp(con->uri, "/jobs", 5))
1783 {
1784 /*
1785 * CGI output...
1786 */
1787
1788 if (!cupsdSendHeader(con, HTTP_OK, "text/html"))
1789 return (cupsdCloseClient(con));
1790
1791 if (httpPrintf(HTTP(con), "\r\n") < 0)
1792 return (cupsdCloseClient(con));
1793
1794 cupsdLogRequest(con, HTTP_OK);
1795 }
1796 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1797 (strchr(con->uri + 12, '/') ||
1798 strlen(con->uri) == 12)) ||
1799 (!strncmp(con->uri, "/admin/log/", 11) &&
1800 (strchr(con->uri + 11, '/') ||
1801 strlen(con->uri) == 11)))
1802 {
1803 /*
1804 * HEAD can only be done to configuration files under
1805 * /admin/conf...
1806 */
1807
1808 if (!cupsdSendError(con, HTTP_FORBIDDEN))
1809 return (cupsdCloseClient(con));
1810
1811 break;
1812 }
1813 else if ((filename = get_file(con, &filestats, buf,
1814 sizeof(buf))) == NULL)
1815 {
1816 if (!cupsdSendHeader(con, HTTP_NOT_FOUND, "text/html"))
1817 return (cupsdCloseClient(con));
1818
1819 cupsdLogRequest(con, HTTP_NOT_FOUND);
1820 }
1821 else if (!check_if_modified(con, &filestats))
1822 {
1823 if (!cupsdSendError(con, HTTP_NOT_MODIFIED))
1824 return (cupsdCloseClient(con));
1825
1826 cupsdLogRequest(con, HTTP_NOT_MODIFIED);
1827 }
1828 else
1829 {
1830 /*
1831 * Serve a file...
1832 */
1833
1834 type = mimeFileType(MimeDatabase, filename, NULL);
1835 if (type == NULL)
1836 strcpy(line, "text/plain");
1837 else
1838 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1839
1840 if (!cupsdSendHeader(con, HTTP_OK, line))
1841 return (cupsdCloseClient(con));
1842
1843 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
1844 httpGetDateString(filestats.st_mtime)) < 0)
1845 return (cupsdCloseClient(con));
1846
1847 if (httpPrintf(HTTP(con), "Content-Length: %lu\r\n",
1848 (unsigned long)filestats.st_size) < 0)
1849 return (cupsdCloseClient(con));
1850
1851 cupsdLogRequest(con, HTTP_OK);
1852 }
1853
1854 if (httpPrintf(HTTP(con), "\r\n") < 0)
1855 return (cupsdCloseClient(con));
1856
1857 con->http.state = HTTP_WAITING;
1858 break;
1859
1860 default :
1861 break; /* Anti-compiler-warning-code */
1862 }
1863 }
1864 }
1865
1866 /*
1867 * Handle any incoming data...
1868 */
1869
1870 switch (con->http.state)
1871 {
1872 case HTTP_PUT_RECV :
1873 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1874 "cupsdReadClient: %d con->data_encoding=HTTP_ENCODE_%s, "
1875 "con->data_remaining=" CUPS_LLFMT ", con->file=%d",
1876 con->http.fd,
1877 con->http.data_encoding == HTTP_ENCODE_CHUNKED ?
1878 "CHUNKED" : "LENGTH",
1879 CUPS_LLCAST con->http.data_remaining, con->file);
1880
1881 if ((bytes = httpRead(HTTP(con), line, sizeof(line))) < 0)
1882 return (cupsdCloseClient(con));
1883 else if (bytes > 0)
1884 {
1885 con->bytes += bytes;
1886
1887 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1888 "cupsdReadClient: %d writing %d bytes to %d",
1889 con->http.fd, bytes, con->file);
1890
1891 if (write(con->file, line, bytes) < bytes)
1892 {
1893 cupsdLogMessage(CUPSD_LOG_ERROR,
1894 "cupsdReadClient: Unable to write %d bytes to %s: %s",
1895 bytes, con->filename, strerror(errno));
1896
1897 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1898 "cupsdReadClient: Closing data file %d...",
1899 con->file);
1900
1901 close(con->file);
1902 con->file = -1;
1903 unlink(con->filename);
1904 cupsdClearString(&con->filename);
1905
1906 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
1907 return (cupsdCloseClient(con));
1908 }
1909 }
1910
1911 if (con->http.state == HTTP_WAITING)
1912 {
1913 /*
1914 * End of file, see how big it is...
1915 */
1916
1917 fstat(con->file, &filestats);
1918
1919 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1920 "cupsdReadClient: %d Closing data file %d, size="
1921 CUPS_LLFMT ".",
1922 con->http.fd, con->file,
1923 CUPS_LLCAST filestats.st_size);
1924
1925 close(con->file);
1926 con->file = -1;
1927
1928 if (filestats.st_size > MaxRequestSize &&
1929 MaxRequestSize > 0)
1930 {
1931 /*
1932 * Request is too big; remove it and send an error...
1933 */
1934
1935 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1936 "cupsdReadClient: %d Removing temp file %s",
1937 con->http.fd, con->filename);
1938 unlink(con->filename);
1939 cupsdClearString(&con->filename);
1940
1941 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
1942 return (cupsdCloseClient(con));
1943 }
1944
1945 /*
1946 * Install the configuration file...
1947 */
1948
1949 status = install_conf_file(con);
1950
1951 /*
1952 * Return the status to the client...
1953 */
1954
1955 if (!cupsdSendError(con, status))
1956 return (cupsdCloseClient(con));
1957 }
1958 break;
1959
1960 case HTTP_POST_RECV :
1961 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1962 "cupsdReadClient: %d con->data_encoding=HTTP_ENCODE_"
1963 "%s, con->data_remaining=" CUPS_LLFMT ", con->file=%d",
1964 con->http.fd,
1965 con->http.data_encoding == HTTP_ENCODE_CHUNKED ?
1966 "CHUNKED" : "LENGTH",
1967 CUPS_LLCAST con->http.data_remaining, con->file);
1968
1969 if (con->request != NULL)
1970 {
1971 /*
1972 * Grab any request data from the connection...
1973 */
1974
1975 if ((ipp_state = ippRead(&(con->http), con->request)) == IPP_ERROR)
1976 {
1977 cupsdLogMessage(CUPSD_LOG_ERROR,
1978 "cupsdReadClient: %d IPP Read Error!",
1979 con->http.fd);
1980
1981 cupsdSendError(con, HTTP_BAD_REQUEST);
1982 return (cupsdCloseClient(con));
1983 }
1984 else if (ipp_state != IPP_DATA)
1985 {
1986 if (con->http.state == HTTP_POST_SEND)
1987 {
1988 cupsdSendError(con, HTTP_BAD_REQUEST);
1989 return (cupsdCloseClient(con));
1990 }
1991
1992 break;
1993 }
1994 else
1995 con->bytes += ippLength(con->request);
1996 }
1997
1998 if (con->file < 0 && con->http.state != HTTP_POST_SEND)
1999 {
2000 /*
2001 * Create a file as needed for the request data...
2002 */
2003
2004 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot, request_id ++);
2005 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
2006
2007 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdReadClient: %d REQUEST %s=%d", con->http.fd,
2008 con->filename, con->file);
2009
2010 if (con->file < 0)
2011 {
2012 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
2013 return (cupsdCloseClient(con));
2014 }
2015
2016 fchmod(con->file, 0640);
2017 fchown(con->file, RunUser, Group);
2018 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2019 }
2020
2021 if (con->http.state != HTTP_POST_SEND)
2022 {
2023 if ((bytes = httpRead(HTTP(con), line, sizeof(line))) < 0)
2024 return (cupsdCloseClient(con));
2025 else if (bytes > 0)
2026 {
2027 con->bytes += bytes;
2028
2029 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2030 "cupsdReadClient: %d writing %d bytes to %d",
2031 con->http.fd, bytes, con->file);
2032
2033 if (write(con->file, line, bytes) < bytes)
2034 {
2035 cupsdLogMessage(CUPSD_LOG_ERROR,
2036 "cupsdReadClient: Unable to write %d bytes to %s: %s",
2037 bytes, con->filename, strerror(errno));
2038
2039 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2040 "cupsdReadClient: Closing file %d...",
2041 con->file);
2042
2043 close(con->file);
2044 con->file = -1;
2045 unlink(con->filename);
2046 cupsdClearString(&con->filename);
2047
2048 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
2049 return (cupsdCloseClient(con));
2050 }
2051 }
2052 else if (con->http.state == HTTP_POST_RECV)
2053 return (1); /* ??? */
2054 else if (con->http.state != HTTP_POST_SEND)
2055 return (cupsdCloseClient(con));
2056 }
2057
2058 if (con->http.state == HTTP_POST_SEND)
2059 {
2060 if (con->file >= 0)
2061 {
2062 fstat(con->file, &filestats);
2063
2064 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2065 "cupsdReadClient: %d Closing data file %d, "
2066 "size=" CUPS_LLFMT ".",
2067 con->http.fd, con->file,
2068 CUPS_LLCAST filestats.st_size);
2069
2070 close(con->file);
2071 con->file = -1;
2072
2073 if (filestats.st_size > MaxRequestSize &&
2074 MaxRequestSize > 0)
2075 {
2076 /*
2077 * Request is too big; remove it and send an error...
2078 */
2079
2080 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2081 "cupsdReadClient: %d Removing temp file %s",
2082 con->http.fd, con->filename);
2083 unlink(con->filename);
2084 cupsdClearString(&con->filename);
2085
2086 if (con->request)
2087 {
2088 /*
2089 * Delete any IPP request data...
2090 */
2091
2092 ippDelete(con->request);
2093 con->request = NULL;
2094 }
2095
2096 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
2097 return (cupsdCloseClient(con));
2098 }
2099
2100 if (con->command)
2101 {
2102 if (!cupsdSendCommand(con, con->command, con->options, 0))
2103 {
2104 if (!cupsdSendError(con, HTTP_NOT_FOUND))
2105 return (cupsdCloseClient(con));
2106 }
2107 else
2108 cupsdLogRequest(con, HTTP_OK);
2109 }
2110 }
2111
2112 if (con->request)
2113 return (cupsdProcessIPPRequest(con));
2114 }
2115 break;
2116
2117 default :
2118 break; /* Anti-compiler-warning-code */
2119 }
2120
2121 if (!con->http.keep_alive && con->http.state == HTTP_WAITING)
2122 return (cupsdCloseClient(con));
2123 else
2124 return (1);
2125}
2126
2127
2128/*
2129 * 'cupsdSendCommand()' - Send output from a command via HTTP.
2130 */
2131
2132int /* O - 1 on success, 0 on failure */
2133cupsdSendCommand(
2134 cupsd_client_t *con, /* I - Client connection */
2135 char *command, /* I - Command to run */
2136 char *options, /* I - Command-line options */
2137 int root) /* I - Run as root? */
2138{
2139 int fd; /* Standard input file descriptor */
2140
2141
2142 if (con->filename)
2143 fd = open(con->filename, O_RDONLY);
2144 else
2145 fd = open("/dev/null", O_RDONLY);
2146
2147 if (fd < 0)
2148 {
2149 cupsdLogMessage(CUPSD_LOG_ERROR,
2150 "cupsdSendCommand: %d Unable to open \"%s\" for reading: %s",
2151 con->http.fd, con->filename ? con->filename : "/dev/null",
2152 strerror(errno));
2153 return (0);
2154 }
2155
2156 fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
2157
2158 con->pipe_pid = pipe_command(con, fd, &(con->file), command, options, root);
2159
2160 close(fd);
2161
2162 cupsdLogMessage(CUPSD_LOG_INFO, "Started \"%s\" (pid=%d)", command,
2163 con->pipe_pid);
2164
2165 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdSendCommand: %d file=%d",
2166 con->http.fd, con->file);
2167
2168 if (con->pipe_pid == 0)
2169 return (0);
2170
2171 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2172
2173 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2174 "cupsdSendCommand: Adding fd %d to InputSet...", con->file);
2175 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2176 "cupsdSendCommand: Adding fd %d to OutputSet...",
2177 con->http.fd);
2178
2179 FD_SET(con->file, InputSet);
2180 FD_SET(con->http.fd, OutputSet);
2181
2182 con->sent_header = 0;
2183 con->file_ready = 0;
2184 con->got_fields = 0;
2185 con->field_col = 0;
2186
2187 return (1);
2188}
2189
2190
2191/*
2192 * 'cupsdSendError()' - Send an error message via HTTP.
2193 */
2194
2195int /* O - 1 if successful, 0 otherwise */
2196cupsdSendError(cupsd_client_t *con, /* I - Connection */
2197 http_status_t code) /* I - Error code */
2198{
2199 /*
2200 * Put the request in the access_log file...
2201 */
2202
2203 cupsdLogRequest(con, code);
2204
2205 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdSendError: %d code=%d (%s)",
2206 con->http.fd, code, httpStatus(code));
2207
2208 /*
2209 * To work around bugs in some proxies, don't use Keep-Alive for some
2210 * error messages...
2211 */
2212
2213 if (code >= HTTP_BAD_REQUEST)
2214 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
2215
2216 /*
2217 * Send an error message back to the client. If the error code is a
2218 * 400 or 500 series, make sure the message contains some text, too!
2219 */
2220
2221 if (!cupsdSendHeader(con, code, NULL))
2222 return (0);
2223
2224#ifdef HAVE_SSL
2225 if (code == HTTP_UPGRADE_REQUIRED)
2226 if (httpPrintf(HTTP(con), "Connection: Upgrade\r\n") < 0)
2227 return (0);
2228
2229 if (httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n") < 0)
2230 return (0);
2231#endif /* HAVE_SSL */
2232
2233 if ((con->http.version >= HTTP_1_1 && !con->http.keep_alive) ||
2234 (code >= HTTP_BAD_REQUEST && code != HTTP_UPGRADE_REQUIRED))
2235 {
2236 if (httpPrintf(HTTP(con), "Connection: close\r\n") < 0)
2237 return (0);
2238 }
2239
2240 if (code >= HTTP_BAD_REQUEST)
2241 {
2242 /*
2243 * Send a human-readable error message.
2244 */
2245
2246 char message[1024]; /* Message for user */
2247 const char *text; /* Status-specific text */
2248
2249 if (code == HTTP_UNAUTHORIZED)
2250 text = _cupsLangString(con->language,
2251 _("Enter your username and password or the "
2252 "root username and password to access this "
2253 "page."));
2254 else if (code == HTTP_UPGRADE_REQUIRED)
2255 text = _cupsLangString(con->language,
2256 _("You must use a https: URL to access this "
2257 "page."));
2258 else
2259 text = "";
2260
2261 snprintf(message, sizeof(message),
2262 "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" "
2263 "\"http://www.w3.org/TR/REC-html40/loose.dtd\">\n"
2264 "<HTML>\n"
2265 "<HEAD>\n"
2266 "\t<META HTTP-EQUIV=\"Content-Type\" "
2267 "CONTENT=\"text/html; charset=utf-8\">\n"
2268 "\t<TITLE>%d %s</TITLE>\n"
2269 "\t<LINK REL=\"STYLESHEET\" TYPE=\"text/css\" "
2270 "HREF=\"/cups.css\">\n"
2271 "</HEAD>\n"
2272 "<BODY>\n"
2273 "<H1>%d %s</H1>\n"
2274 "<P>%s</P>\n"
2275 "</BODY>\n"
2276 "</HTML>\n",
2277 code, httpStatus(code), code, httpStatus(code), text);
2278
2279 if (httpPrintf(HTTP(con), "Content-Type: text/html; charset=utf-8\r\n") < 0)
2280 return (0);
2281 if (httpPrintf(HTTP(con), "Content-Length: %d\r\n",
2282 (int)strlen(message)) < 0)
2283 return (0);
2284 if (httpPrintf(HTTP(con), "\r\n") < 0)
2285 return (0);
2286 if (httpPrintf(HTTP(con), "%s", message) < 0)
2287 return (0);
2288 }
2289 else if (httpPrintf(HTTP(con), "\r\n") < 0)
2290 return (0);
2291
2292 con->http.state = HTTP_WAITING;
2293
2294 return (1);
2295}
2296
2297
2298/*
2299 * 'cupsdSendFile()' - Send a file via HTTP.
2300 */
2301
2302int /* O - 0 on failure, 1 on success */
2303cupsdSendFile(cupsd_client_t *con, /* I - Client connection */
2304 http_status_t code, /* I - HTTP status */
2305 char *filename, /* I - Filename */
2306 char *type, /* I - File type */
2307 struct stat *filestats)/* O - File information */
2308{
2309 con->file = open(filename, O_RDONLY);
2310
2311 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdSendFile: %d file=%d", con->http.fd,
2312 con->file);
2313
2314 if (con->file < 0)
2315 return (0);
2316
2317 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2318
2319 con->pipe_pid = 0;
2320
2321 if (!cupsdSendHeader(con, code, type))
2322 return (0);
2323
2324 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
2325 httpGetDateString(filestats->st_mtime)) < 0)
2326 return (0);
2327 if (httpPrintf(HTTP(con), "Content-Length: " CUPS_LLFMT "\r\n",
2328 CUPS_LLCAST filestats->st_size) < 0)
2329 return (0);
2330 if (httpPrintf(HTTP(con), "\r\n") < 0)
2331 return (0);
2332
2333 con->http.data_encoding = HTTP_ENCODE_LENGTH;
2334 con->http.data_remaining = filestats->st_size;
2335
2336 if (con->http.data_remaining <= INT_MAX)
2337 con->http._data_remaining = con->http.data_remaining;
2338 else
2339 con->http._data_remaining = INT_MAX;
2340
2341 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2342 "cupsdSendFile: Adding fd %d to OutputSet...", con->http.fd);
2343
2344 FD_SET(con->http.fd, OutputSet);
2345
2346 return (1);
2347}
2348
2349
2350/*
2351 * 'cupsdSendHeader()' - Send an HTTP request.
2352 */
2353
2354int /* O - 1 on success, 0 on failure */
2355cupsdSendHeader(cupsd_client_t *con, /* I - Client to send to */
2356 http_status_t code, /* I - HTTP status code */
2357 char *type) /* I - MIME type of document */
2358{
2359 if (httpPrintf(HTTP(con), "HTTP/%d.%d %d %s\r\n", con->http.version / 100,
2360 con->http.version % 100, code, httpStatus(code)) < 0)
2361 return (0);
2362 if (httpPrintf(HTTP(con), "Date: %s\r\n", httpGetDateString(time(NULL))) < 0)
2363 return (0);
2364 if (ServerHeader)
2365 if (httpPrintf(HTTP(con), "Server: %s\r\n", ServerHeader) < 0)
2366 return (0);
2367 if (con->http.keep_alive && con->http.version >= HTTP_1_0)
2368 {
2369 if (httpPrintf(HTTP(con), "Connection: Keep-Alive\r\n") < 0)
2370 return (0);
2371 if (httpPrintf(HTTP(con), "Keep-Alive: timeout=%d\r\n",
2372 KeepAliveTimeout) < 0)
2373 return (0);
2374 }
2375 if (code == HTTP_METHOD_NOT_ALLOWED)
2376 if (httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST\r\n") < 0)
2377 return (0);
2378
2379 if (code == HTTP_UNAUTHORIZED)
2380 {
2381 int auth_type; /* Authentication type */
2382
2383
2384 if (!con->best || con->best->type == AUTH_NONE)
2385 auth_type = DefaultAuthType;
2386 else
2387 auth_type = con->best->type;
2388
2389 if (auth_type != AUTH_DIGEST)
2390 {
2391 if (httpPrintf(HTTP(con),
2392 "WWW-Authenticate: Basic realm=\"CUPS\"\r\n") < 0)
2393 return (0);
2394 }
2395 else
2396 {
2397 if (httpPrintf(HTTP(con),
2398 "WWW-Authenticate: Digest realm=\"CUPS\", nonce=\"%s\"\r\n",
2399 con->http.hostname) < 0)
2400 return (0);
2401 }
2402 }
2403
2404 if (con->language != NULL)
2405 {
2406 if (httpPrintf(HTTP(con), "Content-Language: %s\r\n",
2407 con->language->language) < 0)
2408 return (0);
2409 }
2410
2411 if (type != NULL)
2412 {
2413 if (!strcmp(type, "text/html"))
2414 {
2415 if (httpPrintf(HTTP(con),
2416 "Content-Type: text/html; charset=utf-8\r\n") < 0)
2417 return (0);
2418 }
2419 else if (httpPrintf(HTTP(con), "Content-Type: %s\r\n", type) < 0)
2420 return (0);
2421 }
2422
2423 return (1);
2424}
2425
2426
2427/*
2428 * 'cupsdUpdateCGI()' - Read status messages from CGI scripts and programs.
2429 */
2430
2431void
2432cupsdUpdateCGI(void)
2433{
2434 char *ptr, /* Pointer to end of line in buffer */
2435 message[1024]; /* Pointer to message text */
2436 int loglevel; /* Log level for message */
2437
2438
2439 while ((ptr = cupsdStatBufUpdate(CGIStatusBuffer, &loglevel,
2440 message, sizeof(message))) != NULL)
2441 if (!strchr(CGIStatusBuffer->buffer, '\n'))
2442 break;
2443
2444 if (ptr == NULL && errno)
2445 {
2446 /*
2447 * Fatal error on pipe - should never happen!
2448 */
2449
2450 cupsdLogMessage(CUPSD_LOG_CRIT,
2451 "cupsdUpdateCGI: error reading from CGI error pipe - %s",
2452 strerror(errno));
2453 }
2454}
2455
2456
2457/*
2458 * 'cupsdWriteClient()' - Write data to a client as needed.
2459 */
2460
2461int /* O - 1 if success, 0 if fail */
2462cupsdWriteClient(cupsd_client_t *con) /* I - Client connection */
2463{
2464 int bytes; /* Number of bytes written */
2465 char buf[16385]; /* Data buffer */
2466 char *bufptr; /* Pointer into buffer */
2467 ipp_state_t ipp_state; /* IPP state value */
2468
2469
2470#ifdef DEBUG
2471 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2472 "cupsdWriteClient(con=%p) %d response=%p, file=%d "
2473 "pipe_pid=%d state=%d",
2474 con, con->http.fd, con->response, con->file, con->pipe_pid,
2475 con->http.state);
2476#endif /* DEBUG */
2477
2478 if (con->http.state != HTTP_GET_SEND &&
2479 con->http.state != HTTP_POST_SEND)
2480 return (1);
2481
2482 if (con->response != NULL)
2483 {
2484 ipp_state = ippWrite(&(con->http), con->response);
2485 bytes = ipp_state != IPP_ERROR && ipp_state != IPP_DATA;
2486 }
2487 else if ((bytes = read(con->file, buf, sizeof(buf) - 1)) > 0)
2488 {
2489 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2490 "cupsdWriteClient: Read %d bytes from file %d...",
2491 bytes, con->file);
2492
2493 if (con->pipe_pid && !con->got_fields)
2494 {
2495 /*
2496 * Inspect the data for Content-Type and other fields.
2497 */
2498
2499 buf[bytes] = '\0';
2500
2501 for (bufptr = buf; !con->got_fields && *bufptr; bufptr ++)
2502 if (*bufptr == '\n')
2503 {
2504 /*
2505 * Send line to client...
2506 */
2507
2508 if (bufptr > buf && bufptr[-1] == '\r')
2509 bufptr[-1] = '\0';
2510 *bufptr++ = '\0';
2511
2512 cupsdLogMessage(CUPSD_LOG_DEBUG2, "Script header: %s", buf);
2513
2514 if (!con->sent_header)
2515 {
2516 /*
2517 * Handle redirection and CGI status codes...
2518 */
2519
2520 if (!strncasecmp(buf, "Location:", 9))
2521 cupsdSendHeader(con, HTTP_SEE_OTHER, NULL);
2522 else if (!strncasecmp(buf, "Status:", 7))
2523 cupsdSendHeader(con, atoi(buf + 7), NULL);
2524 else
2525 cupsdSendHeader(con, HTTP_OK, NULL);
2526
2527 if (con->http.version == HTTP_1_1)
2528 {
2529 con->http.data_encoding = HTTP_ENCODE_CHUNKED;
2530
2531 if (httpPrintf(HTTP(con), "Transfer-Encoding: chunked\r\n") < 0)
2532 return (0);
2533 }
2534
2535 con->sent_header = 1;
2536 }
2537
2538 if (strncasecmp(buf, "Status:", 7))
2539 httpPrintf(HTTP(con), "%s\r\n", buf);
2540
2541 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdWriteClient: %d %s",
2542 con->http.fd, buf);
2543
2544 /*
2545 * Update buffer...
2546 */
2547
2548 bytes -= (bufptr - buf);
2549 memmove(buf, bufptr, bytes + 1);
2550 bufptr = buf - 1;
2551
2552 /*
2553 * See if the line was empty...
2554 */
2555
2556 if (con->field_col == 0)
2557 con->got_fields = 1;
2558 else
2559 con->field_col = 0;
2560 }
2561 else if (*bufptr != '\r')
2562 con->field_col ++;
2563
2564 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2565 "cupsdWriteClient: %d bytes=%d, got_fields=%d",
2566 con->http.fd, bytes, con->got_fields);
2567
2568 if (bytes > 0 && !con->got_fields)
2569 {
2570 /*
2571 * Remaining text needs to go out...
2572 */
2573
2574 httpPrintf(HTTP(con), "%s", buf);
2575
2576 con->http.activity = time(NULL);
2577 return (1);
2578 }
2579 else if (bytes == 0)
2580 {
2581 con->http.activity = time(NULL);
2582 return (1);
2583 }
2584 }
2585
2586 if (httpWrite(HTTP(con), buf, bytes) < 0)
2587 {
2588 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2589 "cupsdWriteClient: %d Write of %d bytes failed!",
2590 con->http.fd, bytes);
2591
2592 cupsdCloseClient(con);
2593 return (0);
2594 }
2595
2596 con->bytes += bytes;
2597
2598 if (con->http.state == HTTP_WAITING)
2599 bytes = 0;
2600 }
2601
2602 if (bytes <= 0)
2603 {
2604 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdWriteClient: %d bytes < 0",
2605 con->http.fd);
2606
2607 cupsdLogRequest(con, HTTP_OK);
2608
2609 httpFlushWrite(HTTP(con));
2610
2611 if (con->http.data_encoding == HTTP_ENCODE_CHUNKED)
2612 {
2613 if (httpPrintf(HTTP(con), "0\r\n\r\n") < 0)
2614 {
2615 cupsdCloseClient(con);
2616 return (0);
2617 }
2618 }
2619
2620 con->http.state = HTTP_WAITING;
2621
2622 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2623 "cupsdWriteClient: Removing fd %d from OutputSet...",
2624 con->http.fd);
2625
2626 FD_CLR(con->http.fd, OutputSet);
2627
2628 if (con->file >= 0)
2629 {
2630 if (FD_ISSET(con->file, InputSet))
2631 {
2632 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2633 "cupsdWriteClient: Removing fd %d from InputSet...",
2634 con->file);
2635 FD_CLR(con->file, InputSet);
2636 }
2637
2638 if (con->pipe_pid)
2639 cupsdEndProcess(con->pipe_pid, 0);
2640
2641 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2642 "cupsdWriteClient: %d Closing data file %d.",
2643 con->http.fd, con->file);
2644
2645 close(con->file);
2646 con->file = -1;
2647 con->pipe_pid = 0;
2648 }
2649
2650 if (con->filename)
2651 {
2652 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2653 "cupsdWriteClient: %d Removing temp file %s",
2654 con->http.fd, con->filename);
2655 unlink(con->filename);
2656 cupsdClearString(&con->filename);
2657 }
2658
2659 if (con->request != NULL)
2660 {
2661 ippDelete(con->request);
2662 con->request = NULL;
2663 }
2664
2665 if (con->response != NULL)
2666 {
2667 ippDelete(con->response);
2668 con->response = NULL;
2669 }
2670
2671 cupsdClearString(&con->command);
2672 cupsdClearString(&con->options);
2673
2674 if (!con->http.keep_alive)
2675 {
2676 cupsdCloseClient(con);
2677 return (0);
2678 }
2679 }
2680 else
2681 {
2682 con->file_ready = 0;
2683
2684 if (con->pipe_pid && !FD_ISSET(con->file, InputSet))
2685 {
2686 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2687 "cupsdWriteClient: Adding fd %d to InputSet...",
2688 con->file);
2689 FD_SET(con->file, InputSet);
2690 }
2691 }
2692
2693 con->http.activity = time(NULL);
2694
2695 return (1);
2696}
2697
2698
2699/*
2700 * 'check_if_modified()' - Decode an "If-Modified-Since" line.
2701 */
2702
2703static int /* O - 1 if modified since */
2704check_if_modified(
2705 cupsd_client_t *con, /* I - Client connection */
2706 struct stat *filestats) /* I - File information */
2707{
2708 char *ptr; /* Pointer into field */
2709 time_t date; /* Time/date value */
2710 off_t size; /* Size/length value */
2711
2712
2713 size = 0;
2714 date = 0;
2715 ptr = con->http.fields[HTTP_FIELD_IF_MODIFIED_SINCE];
2716
2717 if (*ptr == '\0')
2718 return (1);
2719
2720 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2721 "check_if_modified: %d If-Modified-Since=\"%s\"",
2722 con->http.fd, ptr);
2723
2724 while (*ptr != '\0')
2725 {
2726 while (isspace(*ptr) || *ptr == ';')
2727 ptr ++;
2728
2729 if (strncasecmp(ptr, "length=", 7) == 0)
2730 {
2731 ptr += 7;
2732 size = strtoll(ptr, NULL, 10);
2733
2734 while (isdigit(*ptr))
2735 ptr ++;
2736 }
2737 else if (isalpha(*ptr))
2738 {
2739 date = httpGetDateTime(ptr);
2740 while (*ptr != '\0' && *ptr != ';')
2741 ptr ++;
2742 }
2743 }
2744
2745 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2746 "check_if_modified: %d sizes=" CUPS_LLFMT ","
2747 CUPS_LLFMT " dates=%d,%d",
2748 con->http.fd, CUPS_LLCAST size,
2749 CUPS_LLCAST filestats->st_size, (int)date,
2750 (int)filestats->st_mtime);
2751
2752 return ((size != filestats->st_size && size != 0) ||
2753 (date < filestats->st_mtime && date != 0) ||
2754 (size == 0 && date == 0));
2755}
2756
2757
2758#ifdef HAVE_CDSASSL
2759/*
2760 * 'get_cdsa_server_certs()' - Convert a keychain name into the CFArrayRef
2761 * required by SSLSetCertificate.
2762 *
2763 * For now we assumes that there is exactly one SecIdentity in the
2764 * keychain - i.e. there is exactly one matching cert/private key pair.
2765 * In the future we will search a keychain for a SecIdentity matching a
2766 * specific criteria. We also skip the operation of adding additional
2767 * non-signing certs from the keychain to the CFArrayRef.
2768 *
2769 * To create a self-signed certificate for testing use the certtool.
2770 * Executing the following as root will do it:
2771 *
2772 * certtool c c v k=CUPS
2773 */
2774
2775static CFArrayRef /* O - Array of certificates */
2776get_cdsa_server_certs(void)
2777{
2778 OSStatus err; /* Error info */
2779 SecKeychainRef kcRef; /* Keychain reference */
2780 SecIdentitySearchRef srchRef; /* Search reference */
2781 SecIdentityRef identity; /* Identity */
2782 CFArrayRef ca; /* Certificate array */
2783
2784
2785 kcRef = NULL;
2786 srchRef = NULL;
2787 identity = NULL;
2788 ca = NULL;
2789 err = SecKeychainOpen(ServerCertificate, &kcRef);
2790
2791 if (err)
2792 cupsdLogMessage(CUPSD_LOG_ERROR, "Cannot open keychain \"%s\", error %d.",
2793 ServerCertificate, (int)err);
2794 else
2795 {
2796 /*
2797 * Search for "any" identity matching specified key use;
2798 * in this app, we expect there to be exactly one.
2799 */
2800
2801 err = SecIdentitySearchCreate(kcRef, CSSM_KEYUSE_SIGN, &srchRef);
2802
2803 if (err)
2804 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2805 "Cannot find signing key in keychain \"%s\", error %d",
2806 ServerCertificate, (int)err);
2807 else
2808 {
2809 err = SecIdentitySearchCopyNext(srchRef, &identity);
2810
2811 if (err)
2812 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2813 "Cannot find signing key in keychain \"%s\", error %d",
2814 ServerCertificate, (int)err);
2815 else
2816 {
2817 if (CFGetTypeID(identity) != SecIdentityGetTypeID())
2818 cupsdLogMessage(CUPSD_LOG_ERROR,
2819 "SecIdentitySearchCopyNext CFTypeID failure!");
2820 else
2821 {
2822 /*
2823 * Found one. Place it in a CFArray.
2824 * TBD: snag other (non-identity) certs from keychain and add them
2825 * to array as well.
2826 */
2827
2828 ca = CFArrayCreate(NULL, (const void **)&identity, 1, NULL);
2829
2830 if (ca == nil)
2831 cupsdLogMessage(CUPSD_LOG_ERROR, "CFArrayCreate error");
2832 }
2833
2834 /*CFRelease(identity);*/
2835 }
2836
2837 /*CFRelease(srchRef);*/
2838 }
2839
2840 /*CFRelease(kcRef);*/
2841 }
2842
2843 return (ca);
2844}
2845#endif /* HAVE_CDSASSL */
2846
2847
2848/*
2849 * 'get_file()' - Get a filename and state info.
2850 */
2851
2852static char * /* O - Real filename */
2853get_file(cupsd_client_t *con, /* I - Client connection */
2854 struct stat *filestats, /* O - File information */
2855 char *filename, /* IO - Filename buffer */
2856 int len) /* I - Buffer length */
2857{
2858 int status; /* Status of filesystem calls */
2859 char *ptr; /* Pointer info filename */
2860 int plen; /* Remaining length after pointer */
2861
2862
2863 /*
2864 * Need to add DocumentRoot global...
2865 */
2866
2867 if (!strncmp(con->uri, "/ppd/", 5))
2868 snprintf(filename, len, "%s%s", ServerRoot, con->uri);
2869 else if (!strncmp(con->uri, "/admin/conf/", 12))
2870 snprintf(filename, len, "%s%s", ServerRoot, con->uri + 11);
2871 else if (!strncmp(con->uri, "/admin/log/", 11))
2872 {
2873 if (!strcmp(con->uri + 11, "access_log") && AccessLog[0] == '/')
2874 strlcpy(filename, AccessLog, len);
2875 else if (!strcmp(con->uri + 11, "error_log") && ErrorLog[0] == '/')
2876 strlcpy(filename, ErrorLog, len);
2877 else if (!strcmp(con->uri + 11, "page_log") && PageLog[0] == '/')
2878 strlcpy(filename, PageLog, len);
2879 else
2880 return (NULL);
2881 }
2882 else if (con->language != NULL)
2883 snprintf(filename, len, "%s/%s%s", DocumentRoot, con->language->language,
2884 con->uri);
2885 else
2886 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
2887
2888 if ((ptr = strchr(filename, '?')) != NULL)
2889 *ptr = '\0';
2890
2891 /*
2892 * Grab the status for this language; if there isn't a language-specific file
2893 * then fallback to the default one...
2894 */
2895
2896 if ((status = stat(filename, filestats)) != 0 && con->language != NULL)
2897 {
2898 /*
2899 * Drop the language prefix and try the current directory...
2900 */
2901
2902 if (strncmp(con->uri, "/ppd/", 5) &&
2903 strncmp(con->uri, "/admin/conf/", 12) &&
2904 strncmp(con->uri, "/admin/log/", 11))
2905 {
2906 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
2907
2908 if ((ptr = strchr(filename, '?')) != NULL)
2909 *ptr = '\0';
2910
2911 status = stat(filename, filestats);
2912 }
2913 }
2914
2915 /*
2916 * If we're found a directory, get the index.html file instead...
2917 */
2918
2919 if (!status && S_ISDIR(filestats->st_mode))
2920 {
2921 if (filename[strlen(filename) - 1] != '/')
2922 strlcat(filename, "/", len);
2923
2924 ptr = filename + strlen(filename);
2925 plen = len - (ptr - filename);
2926
2927 strlcpy(ptr, "index.html", plen);
2928 status = stat(filename, filestats);
2929
2930#ifdef HAVE_JAVA
2931 if (status)
2932 {
2933 strlcpy(ptr, "index.class", plen);
2934 status = stat(filename, filestats);
2935 }
2936#endif /* HAVE_JAVA */
2937
2938#ifdef HAVE_PERL
2939 if (status)
2940 {
2941 strlcpy(ptr, "index.pl", plen);
2942 status = stat(filename, filestats);
2943 }
2944#endif /* HAVE_PERL */
2945
2946#ifdef HAVE_PHP
2947 if (status)
2948 {
2949 strlcpy(ptr, "index.php", plen);
2950 status = stat(filename, filestats);
2951 }
2952#endif /* HAVE_PHP */
2953
2954#ifdef HAVE_PYTHON
2955 if (status)
2956 {
2957 strlcpy(ptr, "index.pyc", plen);
2958 status = stat(filename, filestats);
2959 }
2960
2961 if (status)
2962 {
2963 strlcpy(ptr, "index.py", plen);
2964 status = stat(filename, filestats);
2965 }
2966#endif /* HAVE_PYTHON */
2967 }
2968
2969 cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_file: %d filename=%s size=%d",
2970 con->http.fd, filename,
2971 status ? -1 : (int)filestats->st_size);
2972
2973 if (!status)
2974 con->http.data_remaining = (int)filestats->st_size;
2975
2976 if (status)
2977 return (NULL);
2978 else
2979 return (filename);
2980}
2981
2982
2983/*
2984 * 'install_conf_file()' - Install a configuration file.
2985 */
2986
2987static http_status_t /* O - Status */
2988install_conf_file(cupsd_client_t *con) /* I - Connection */
2989{
2990 cups_file_t *in, /* Input file */
2991 *out; /* Output file */
2992 char buffer[1024]; /* Copy buffer */
2993 int bytes; /* Number of bytes */
2994 char conffile[1024], /* Configuration filename */
2995 newfile[1024], /* New config filename */
2996 oldfile[1024]; /* Old config filename */
2997 struct stat confinfo; /* Config file info */
2998
2999
3000 /*
3001 * First construct the filenames...
3002 */
3003
3004 snprintf(conffile, sizeof(conffile), "%s%s", ServerRoot, con->uri + 11);
3005 snprintf(newfile, sizeof(newfile), "%s%s.N", ServerRoot, con->uri + 11);
3006 snprintf(oldfile, sizeof(oldfile), "%s%s.O", ServerRoot, con->uri + 11);
3007
3008 cupsdLogMessage(CUPSD_LOG_INFO, "Installing config file \"%s\"...", conffile);
3009
3010 /*
3011 * Get the owner, group, and permissions of the configuration file.
3012 * If it doesn't exist, assign it to the User and Group in the
3013 * cupsd.conf file with mode 0640 permissions.
3014 */
3015
3016 if (stat(conffile, &confinfo))
3017 {
3018 confinfo.st_uid = User;
3019 confinfo.st_gid = Group;
3020 confinfo.st_mode = ConfigFilePerm;
3021 }
3022
3023 /*
3024 * Open the request file and new config file...
3025 */
3026
3027 if ((in = cupsFileOpen(con->filename, "rb")) == NULL)
3028 {
3029 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open request file \"%s\" - %s",
3030 con->filename, strerror(errno));
3031 return (HTTP_SERVER_ERROR);
3032 }
3033
3034 if ((out = cupsFileOpen(newfile, "wb")) == NULL)
3035 {
3036 cupsFileClose(in);
3037 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open config file \"%s\" - %s",
3038 newfile, strerror(errno));
3039 return (HTTP_SERVER_ERROR);
3040 }
3041
3042 fchmod(cupsFileNumber(out), confinfo.st_mode);
3043 fchown(cupsFileNumber(out), confinfo.st_uid, confinfo.st_gid);
3044
3045 /*
3046 * Copy from the request to the new config file...
3047 */
3048
3049 while ((bytes = cupsFileRead(in, buffer, sizeof(buffer))) > 0)
3050 if (cupsFileWrite(out, buffer, bytes) < bytes)
3051 {
3052 cupsdLogMessage(CUPSD_LOG_ERROR,
3053 "Unable to copy to config file \"%s\" - %s",
3054 newfile, strerror(errno));
3055
3056 cupsFileClose(in);
3057 cupsFileClose(out);
3058 unlink(newfile);
3059
3060 return (HTTP_SERVER_ERROR);
3061 }
3062
3063 /*
3064 * Close the files...
3065 */
3066
3067 cupsFileClose(in);
3068 if (cupsFileClose(out))
3069 {
3070 cupsdLogMessage(CUPSD_LOG_ERROR,
3071 "Error file closing config file \"%s\" - %s",
3072 newfile, strerror(errno));
3073
3074 unlink(newfile);
3075
3076 return (HTTP_SERVER_ERROR);
3077 }
3078
3079 /*
3080 * Remove the request file...
3081 */
3082
3083 unlink(con->filename);
3084 cupsdClearString(&con->filename);
3085
3086 /*
3087 * Unlink the old backup, rename the current config file to the backup
3088 * filename, and rename the new config file to the config file name...
3089 */
3090
3091 if (unlink(oldfile))
3092 if (errno != ENOENT)
3093 {
3094 cupsdLogMessage(CUPSD_LOG_ERROR,
3095 "Unable to remove backup config file \"%s\" - %s",
3096 oldfile, strerror(errno));
3097
3098 unlink(newfile);
3099
3100 return (HTTP_SERVER_ERROR);
3101 }
3102
3103 if (rename(conffile, oldfile))
3104 if (errno != ENOENT)
3105 {
3106 cupsdLogMessage(CUPSD_LOG_ERROR,
3107 "Unable to rename old config file \"%s\" - %s",
3108 conffile, strerror(errno));
3109
3110 unlink(newfile);
3111
3112 return (HTTP_SERVER_ERROR);
3113 }
3114
3115 if (rename(newfile, conffile))
3116 {
3117 cupsdLogMessage(CUPSD_LOG_ERROR,
3118 "Unable to rename new config file \"%s\" - %s",
3119 newfile, strerror(errno));
3120
3121 rename(oldfile, conffile);
3122 unlink(newfile);
3123
3124 return (HTTP_SERVER_ERROR);
3125 }
3126
3127 /*
3128 * If the cupsd.conf file was updated, set the NeedReload flag...
3129 */
3130
3131 if (!strcmp(con->uri, "/admin/conf/cupsd.conf"))
3132 NeedReload = RELOAD_CUPSD;
3133 else
3134 NeedReload = RELOAD_ALL;
3135
3136 ReloadTime = time(NULL);
3137
3138 /*
3139 * Return that the file was created successfully...
3140 */
3141
3142 return (HTTP_CREATED);
3143}
3144
3145
3146/*
3147 * 'is_path_absolute()' - Is a path absolute and free of relative elements (i.e. "..").
3148 */
3149
3150static int /* O - 0 if relative, 1 if absolute */
3151is_path_absolute(const char *path) /* I - Input path */
3152{
3153 /*
3154 * Check for a leading slash...
3155 */
3156
3157 if (path[0] != '/')
3158 return (0);
3159
3160 /*
3161 * Check for "/.." in the path...
3162 */
3163
3164 while ((path = strstr(path, "/..")) != NULL)
3165 {
3166 if (!path[3] || path[3] == '/')
3167 return (0);
3168
3169 path ++;
3170 }
3171
3172 /*
3173 * If we haven't found any relative paths, return 1 indicating an
3174 * absolute path...
3175 */
3176
3177 return (1);
3178}
3179
3180
3181/*
3182 * 'pipe_command()' - Pipe the output of a command to the remote client.
3183 */
3184
3185static int /* O - Process ID */
3186pipe_command(cupsd_client_t *con, /* I - Client connection */
3187 int infile, /* I - Standard input for command */
3188 int *outfile, /* O - Standard output for command */
3189 char *command, /* I - Command to run */
3190 char *options, /* I - Options for command */
3191 int root) /* I - Run as root? */
3192{
3193 int i; /* Looping var */
3194 int pid; /* Process ID */
3195 char *commptr; /* Command string pointer */
3196 char *uriptr; /* URI string pointer */
3197 int fds[2]; /* Pipe FDs */
3198 int argc; /* Number of arguments */
3199 int envc; /* Number of environment variables */
3200 char argbuf[10240], /* Argument buffer */
3201 *argv[100], /* Argument strings */
3202 *envp[100]; /* Environment variables */
3203 char content_length[1024], /* CONTENT_LENGTH environment variable */
3204 content_type[1024], /* CONTENT_TYPE environment variable */
3205 http_cookie[32768], /* HTTP_COOKIE environment variable */
3206 http_user_agent[1024], /* HTTP_USER_AGENT environment variable */
3207 lang[1024], /* LANG environment variable */
3208 *query_string, /* QUERY_STRING env variable */
3209 remote_addr[1024], /* REMOTE_ADDR environment variable */
3210 remote_host[1024], /* REMOTE_HOST environment variable */
3211 remote_user[1024], /* REMOTE_USER environment variable */
3212 script_name[1024], /* SCRIPT_NAME environment variable */
3213 server_name[1024], /* SERVER_NAME environment variable */
3214 server_port[1024]; /* SERVER_PORT environment variable */
3215
3216
3217 /*
3218 * Parse a copy of the options string, which is of the form:
3219 *
3220 * name argument+argument+argument
3221 * name?argument+argument+argument
3222 * name param=value&param=value
3223 * name?param=value&param=value
3224 *
3225 * If the string contains an "=" character after the initial name,
3226 * then we treat it as a HTTP GET form request and make a copy of
3227 * the remaining string for the environment variable.
3228 *
3229 * The string is always parsed out as command-line arguments, to
3230 * be consistent with Apache...
3231 */
3232
3233 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3234 "pipe_command: command=\"%s\", options=\"%s\"",
3235 command, options);
3236
3237 strlcpy(argbuf, options, sizeof(argbuf));
3238
3239 argv[0] = argbuf;
3240 query_string = NULL;
3241
3242 for (commptr = argbuf, argc = 1; *commptr != '\0' && argc < 99; commptr ++)
3243 {
3244 /*
3245 * Break arguments whenever we see a + or space...
3246 */
3247
3248 if (*commptr == ' ' || *commptr == '+' || (*commptr == '?' && argc == 1))
3249 {
3250 /*
3251 * Terminate the current string and skip trailing whitespace...
3252 */
3253
3254 *commptr++ = '\0';
3255
3256 while (*commptr == ' ')
3257 commptr ++;
3258
3259 /*
3260 * If we don't have a blank string, save it as another argument...
3261 */
3262
3263 if (*commptr)
3264 {
3265 argv[argc] = commptr;
3266 argc ++;
3267 }
3268 else
3269 break;
3270
3271 /*
3272 * If we see an "=" in the remaining string, make a copy of it since
3273 * it will be query data...
3274 */
3275
3276 if (argc == 2 && strchr(commptr, '=') && con->operation == HTTP_GET)
3277 cupsdSetStringf(&query_string, "QUERY_STRING=%s", commptr);
3278
3279 /*
3280 * Don't skip the first non-blank character...
3281 */
3282
3283 commptr --;
3284 }
3285 else if (*commptr == '%' && isxdigit(commptr[1] & 255) &&
3286 isxdigit(commptr[2] & 255))
3287 {
3288 /*
3289 * Convert the %xx notation to the individual character.
3290 */
3291
3292 if (commptr[1] >= '0' && commptr[1] <= '9')
3293 *commptr = (commptr[1] - '0') << 4;
3294 else
3295 *commptr = (tolower(commptr[1]) - 'a' + 10) << 4;
3296
3297 if (commptr[2] >= '0' && commptr[2] <= '9')
3298 *commptr |= commptr[2] - '0';
3299 else
3300 *commptr |= tolower(commptr[2]) - 'a' + 10;
3301
3302 _cups_strcpy(commptr + 1, commptr + 3);
3303
3304 /*
3305 * Check for a %00 and break if that is the case...
3306 */
3307
3308 if (!*commptr)
3309 break;
3310 }
3311 }
3312
3313 argv[argc] = NULL;
3314
3315 if (argv[0][0] == '\0')
3316 argv[0] = strrchr(command, '/') + 1;
3317
3318 /*
3319 * Setup the environment variables as needed...
3320 */
3321
3322 if (con->language)
3323 snprintf(lang, sizeof(lang), "LANG=%s.UTF-8", con->language->language);
3324 else
3325 strcpy(lang, "LANG=C");
3326
3327 strcpy(remote_addr, "REMOTE_ADDR=");
3328 httpAddrString(con->http.hostaddr, remote_addr + 12,
3329 sizeof(remote_addr) - 12);
3330
3331 snprintf(remote_host, sizeof(remote_host), "REMOTE_HOST=%s",
3332 con->http.hostname);
3333
3334 snprintf(script_name, sizeof(script_name), "SCRIPT_NAME=%s", con->uri);
3335 if ((uriptr = strchr(script_name, '?')) != NULL)
3336 *uriptr = '\0';
3337
3338 sprintf(server_port, "SERVER_PORT=%d", con->serverport);
3339
3340 snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s",
3341 con->servername);
3342
3343 envc = cupsdLoadEnv(envp, (int)(sizeof(envp) / sizeof(envp[0])));
3344
3345 envp[envc ++] = lang;
3346 envp[envc ++] = "REDIRECT_STATUS=1";
3347 envp[envc ++] = server_name;
3348 envp[envc ++] = server_port;
3349 envp[envc ++] = remote_addr;
3350 envp[envc ++] = remote_host;
3351 envp[envc ++] = script_name;
3352
3353 if (con->username[0])
3354 {
3355 snprintf(remote_user, sizeof(remote_user), "REMOTE_USER=%s", con->username);
3356
3357 envp[envc ++] = remote_user;
3358 }
3359
3360 if (con->http.version == HTTP_1_1)
3361 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.1";
3362 else if (con->http.version == HTTP_1_0)
3363 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.0";
3364 else
3365 envp[envc ++] = "SERVER_PROTOCOL=HTTP/0.9";
3366
3367 if (con->http.cookie)
3368 {
3369 snprintf(http_cookie, sizeof(http_cookie), "HTTP_COOKIE=%s",
3370 con->http.cookie);
3371 envp[envc ++] = http_cookie;
3372 }
3373
3374 if (con->http.fields[HTTP_FIELD_USER_AGENT][0])
3375 {
3376 snprintf(http_user_agent, sizeof(http_user_agent), "HTTP_USER_AGENT=%s",
3377 con->http.fields[HTTP_FIELD_USER_AGENT]);
3378 envp[envc ++] = http_user_agent;
3379 }
3380
3381 if (con->operation == HTTP_GET)
3382 {
3383 for (i = 0; i < argc; i ++)
3384 cupsdLogMessage(CUPSD_LOG_DEBUG2, "argv[%d] = \"%s\"", i, argv[i]);
3385
3386 envp[envc ++] = "REQUEST_METHOD=GET";
3387
3388 if (query_string)
3389 {
3390 /*
3391 * Add GET form variables after ?...
3392 */
3393
3394 envp[envc ++] = query_string;
3395 }
3396 }
3397 else
3398 {
3399 sprintf(content_length, "CONTENT_LENGTH=" CUPS_LLFMT, con->bytes);
3400 snprintf(content_type, sizeof(content_type), "CONTENT_TYPE=%s",
3401 con->http.fields[HTTP_FIELD_CONTENT_TYPE]);
3402
3403 envp[envc ++] = "REQUEST_METHOD=POST";
3404 envp[envc ++] = content_length;
3405 envp[envc ++] = content_type;
3406 }
3407
3408 /*
3409 * Tell the CGI if we are using encryption...
3410 */
3411
3412 if (con->http.encryption == HTTP_ENCRYPT_ALWAYS)
3413 envp[envc ++] = "HTTPS=ON";
3414
3415 /*
3416 * Terminate the environment array...
3417 */
3418
3419 envp[envc] = NULL;
3420
3421 if (LogLevel == CUPSD_LOG_DEBUG2)
3422 {
3423 for (i = 0; i < argc; i ++)
3424 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3425 "pipe_command: argv[%d] = \"%s\"", i, argv[i]);
3426 for (i = 0; i < envc; i ++)
3427 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3428 "pipe_command: envp[%d] = \"%s\"", i, envp[i]);
3429 }
3430
3431 /*
3432 * Create a pipe for the output...
3433 */
3434
3435 if (cupsdOpenPipe(fds))
3436 {
3437 cupsdClearString(&query_string);
3438
3439 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create pipes for CGI %s - %s",
3440 argv[0], strerror(errno));
3441 return (0);
3442 }
3443
3444 /*
3445 * Then execute the command...
3446 */
3447
3448 if (cupsdStartProcess(command, argv, envp, infile, fds[1], CGIPipes[1],
3449 -1, root, &pid) < 0)
3450 {
3451 /*
3452 * Error - can't fork!
3453 */
3454
3455 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to fork for CGI %s - %s", argv[0],
3456 strerror(errno));
3457
3458 cupsdClosePipe(fds);
3459 pid = 0;
3460 }
3461 else
3462 {
3463 /*
3464 * Fork successful - return the PID...
3465 */
3466
3467 if (con->username[0])
3468 cupsdAddCert(pid, con->username);
3469
3470 cupsdLogMessage(CUPSD_LOG_DEBUG, "CGI %s started - PID = %d", command, pid);
3471
3472 *outfile = fds[0];
3473 close(fds[1]);
3474 }
3475
3476 cupsdClearString(&query_string);
3477
3478 return (pid);
3479}
3480
3481
3482/*
3483 * End of "$Id: client.c 4912 2006-01-10 21:43:56Z mike $".
3484 */
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