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Merge changes from CUPS 1.4svn-r8659
[thirdparty/cups.git] / scheduler / client.c
1 /*
2 * "$Id: client.c 7950 2008-09-17 00:21:59Z mike $"
3 *
4 * Client routines for the Common UNIX Printing System (CUPS) scheduler.
5 *
6 * Copyright 2007-2009 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 * encrypt_client() - Enable encryption for the client...
35 * get_cdsa_certificate() - Get a SSL/TLS certificate from the System
36 * keychain.
37 * get_file() - Get a filename and state info.
38 * install_conf_file() - Install a configuration file.
39 * is_cgi() - Is the resource a CGI script/program?
40 * is_path_absolute() - Is a path absolute and free of relative elements
41 * (i.e. "..").
42 * make_certificate() - Make a self-signed SSL/TLS certificate.
43 * pipe_command() - Pipe the output of a command to the remote client.
44 * valid_host() - Is the Host: field valid?
45 * write_file() - Send a file via HTTP.
46 * write_pipe() - Flag that data is available on the CGI pipe.
47 */
48
49 /*
50 * Include necessary headers...
51 */
52
53 #include "cupsd.h"
54
55 #ifdef HAVE_CDSASSL
56 # include <Security/Security.h>
57 # ifdef HAVE_SECIDENTITYSEARCHPRIV_H
58 # include <Security/SecIdentitySearchPriv.h>
59 # else /* Declare prototype for function in that header... */
60 extern OSStatus SecIdentitySearchCreateWithPolicy(SecPolicyRef policy,
61 CFStringRef idString, CSSM_KEYUSE keyUsage,
62 CFTypeRef keychainOrArray,
63 Boolean returnOnlyValidIdentities,
64 SecIdentitySearchRef* searchRef);
65 # endif /* HAVE_SECIDENTITYSEARCHPRIV_H */
66 # ifdef HAVE_SECPOLICYPRIV_H
67 # include <Security/SecPolicyPriv.h>
68 # else /* Declare prototype for function in that header... */
69 extern OSStatus SecPolicySetValue(SecPolicyRef policyRef,
70 const CSSM_DATA *value);
71 # endif /* HAVE_SECPOLICYPRIV_H */
72 # ifdef HAVE_SECBASEPRIV_H
73 # include <Security/SecBasePriv.h>
74 # else /* Declare prototype for function in that header... */
75 extern const char *cssmErrorString(int error);
76 # endif /* HAVE_SECBASEPRIV_H */
77 #endif /* HAVE_CDSASSL */
78
79 #ifdef HAVE_GNUTLS
80 # include <gnutls/x509.h>
81 #endif /* HAVE_GNUTLS */
82
83 #ifdef HAVE_TCPD_H
84 # include <tcpd.h>
85 #endif /* HAVE_TCPD_H */
86
87
88 /*
89 * Local functions...
90 */
91
92 static int check_if_modified(cupsd_client_t *con,
93 struct stat *filestats);
94 static int compare_clients(cupsd_client_t *a, cupsd_client_t *b,
95 void *data);
96 static int data_ready(cupsd_client_t *con);
97 #ifdef HAVE_SSL
98 static int encrypt_client(cupsd_client_t *con);
99 #endif /* HAVE_SSL */
100 #ifdef HAVE_CDSASSL
101 static CFArrayRef get_cdsa_certificate(cupsd_client_t *con);
102 #endif /* HAVE_CDSASSL */
103 static char *get_file(cupsd_client_t *con, struct stat *filestats,
104 char *filename, int len);
105 static http_status_t install_conf_file(cupsd_client_t *con);
106 static int is_cgi(cupsd_client_t *con, const char *filename,
107 struct stat *filestats, mime_type_t *type);
108 static int is_path_absolute(const char *path);
109 #ifdef HAVE_SSL
110 static int make_certificate(cupsd_client_t *con);
111 #endif /* HAVE_SSL */
112 static int pipe_command(cupsd_client_t *con, int infile, int *outfile,
113 char *command, char *options, int root);
114 static int valid_host(cupsd_client_t *con);
115 static int write_file(cupsd_client_t *con, http_status_t code,
116 char *filename, char *type,
117 struct stat *filestats);
118 static void write_pipe(cupsd_client_t *con);
119
120
121 /*
122 * 'cupsdAcceptClient()' - Accept a new client.
123 */
124
125 void
126 cupsdAcceptClient(cupsd_listener_t *lis)/* I - Listener socket */
127 {
128 int count; /* Count of connections on a host */
129 int val; /* Parameter value */
130 cupsd_client_t *con, /* New client pointer */
131 *tempcon; /* Temporary client pointer */
132 http_addrlist_t *addrlist, /* List of adddresses for host */
133 *addr; /* Current address */
134 socklen_t addrlen; /* Length of address */
135 char *hostname; /* Hostname for address */
136 http_addr_t temp; /* Temporary address variable */
137 static time_t last_dos = 0; /* Time of last DoS attack */
138 #ifdef HAVE_TCPD_H
139 struct request_info wrap_req; /* TCP wrappers request information */
140 #endif /* HAVE_TCPD_H */
141
142
143 cupsdLogMessage(CUPSD_LOG_DEBUG2,
144 "cupsdAcceptClient(lis=%p(%d)) Clients=%d",
145 lis, lis->fd, cupsArrayCount(Clients));
146
147 /*
148 * Make sure we don't have a full set of clients already...
149 */
150
151 if (cupsArrayCount(Clients) == MaxClients)
152 return;
153
154 /*
155 * Get a pointer to the next available client...
156 */
157
158 if (!Clients)
159 Clients = cupsArrayNew(NULL, NULL);
160
161 if (!Clients)
162 {
163 cupsdLogMessage(CUPSD_LOG_ERROR,
164 "Unable to allocate memory for clients array!");
165 cupsdPauseListening();
166 return;
167 }
168
169 if (!ActiveClients)
170 ActiveClients = cupsArrayNew((cups_array_func_t)compare_clients, NULL);
171
172 if (!ActiveClients)
173 {
174 cupsdLogMessage(CUPSD_LOG_ERROR,
175 "Unable to allocate memory for active clients array!");
176 cupsdPauseListening();
177 return;
178 }
179
180 if ((con = calloc(1, sizeof(cupsd_client_t))) == NULL)
181 {
182 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to allocate memory for client!");
183 cupsdPauseListening();
184 return;
185 }
186
187 con->http.activity = time(NULL);
188 con->file = -1;
189 con->http.hostaddr = &(con->clientaddr);
190
191 /*
192 * Accept the client and get the remote address...
193 */
194
195 addrlen = sizeof(http_addr_t);
196
197 if ((con->http.fd = accept(lis->fd, (struct sockaddr *)con->http.hostaddr,
198 &addrlen)) < 0)
199 {
200 if (errno == ENFILE || errno == EMFILE)
201 cupsdPauseListening();
202
203 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to accept client connection - %s.",
204 strerror(errno));
205 free(con);
206
207 return;
208 }
209
210 #ifdef AF_INET6
211 if (lis->address.addr.sa_family == AF_INET6)
212 {
213 /*
214 * Save the connected port number...
215 */
216
217 con->http.hostaddr->ipv6.sin6_port = lis->address.ipv6.sin6_port;
218
219 /*
220 * Convert IPv4 over IPv6 addresses (::ffff:n.n.n.n) to IPv4 forms we
221 * can more easily use...
222 */
223
224 if (con->http.hostaddr->ipv6.sin6_addr.s6_addr32[0] == 0 &&
225 con->http.hostaddr->ipv6.sin6_addr.s6_addr32[1] == 0 &&
226 ntohl(con->http.hostaddr->ipv6.sin6_addr.s6_addr32[2]) == 0xffff)
227 con->http.hostaddr->ipv6.sin6_addr.s6_addr32[2] = 0;
228 }
229 else
230 #endif /* AF_INET6 */
231 if (lis->address.addr.sa_family == AF_INET)
232 con->http.hostaddr->ipv4.sin_port = lis->address.ipv4.sin_port;
233
234 /*
235 * Check the number of clients on the same address...
236 */
237
238 for (count = 0, tempcon = (cupsd_client_t *)cupsArrayFirst(Clients);
239 tempcon;
240 tempcon = (cupsd_client_t *)cupsArrayNext(Clients))
241 if (httpAddrEqual(tempcon->http.hostaddr, con->http.hostaddr))
242 {
243 count ++;
244 if (count >= MaxClientsPerHost)
245 break;
246 }
247
248 if (count >= MaxClientsPerHost)
249 {
250 if ((time(NULL) - last_dos) >= 60)
251 {
252 last_dos = time(NULL);
253 cupsdLogMessage(CUPSD_LOG_WARN,
254 "Possible DoS attack - more than %d clients connecting "
255 "from %s!",
256 MaxClientsPerHost,
257 httpAddrString(con->http.hostaddr, con->http.hostname,
258 sizeof(con->http.hostname)));
259 }
260
261 #ifdef WIN32
262 closesocket(con->http.fd);
263 #else
264 close(con->http.fd);
265 #endif /* WIN32 */
266
267 free(con);
268 return;
269 }
270
271 /*
272 * Get the hostname or format the IP address as needed...
273 */
274
275 if (httpAddrLocalhost(con->http.hostaddr))
276 {
277 /*
278 * Map accesses from the loopback interface to "localhost"...
279 */
280
281 strlcpy(con->http.hostname, "localhost", sizeof(con->http.hostname));
282 hostname = con->http.hostname;
283 }
284 else
285 {
286 /*
287 * Map accesses from the same host to the server name.
288 */
289
290 if (HostNameLookups)
291 hostname = httpAddrLookup(con->http.hostaddr, con->http.hostname,
292 sizeof(con->http.hostname));
293 else
294 {
295 hostname = NULL;
296 httpAddrString(con->http.hostaddr, con->http.hostname,
297 sizeof(con->http.hostname));
298 }
299 }
300
301 if (hostname == NULL && HostNameLookups == 2)
302 {
303 /*
304 * Can't have an unresolved IP address with double-lookups enabled...
305 */
306
307 #ifdef WIN32
308 closesocket(con->http.fd);
309 #else
310 close(con->http.fd);
311 #endif /* WIN32 */
312
313 cupsdLogMessage(CUPSD_LOG_WARN,
314 "Name lookup failed - connection from %s closed!",
315 con->http.hostname);
316
317 free(con);
318 return;
319 }
320
321 if (HostNameLookups == 2)
322 {
323 /*
324 * Do double lookups as needed...
325 */
326
327 if ((addrlist = httpAddrGetList(con->http.hostname, AF_UNSPEC, NULL))
328 != NULL)
329 {
330 /*
331 * See if the hostname maps to the same IP address...
332 */
333
334 for (addr = addrlist; addr; addr = addr->next)
335 if (httpAddrEqual(con->http.hostaddr, &(addr->addr)))
336 break;
337 }
338 else
339 addr = NULL;
340
341 httpAddrFreeList(addrlist);
342
343 if (!addr)
344 {
345 /*
346 * Can't have a hostname that doesn't resolve to the same IP address
347 * with double-lookups enabled...
348 */
349
350 #ifdef WIN32
351 closesocket(con->http.fd);
352 #else
353 close(con->http.fd);
354 #endif /* WIN32 */
355
356 cupsdLogMessage(CUPSD_LOG_WARN,
357 "IP lookup failed - connection from %s closed!",
358 con->http.hostname);
359 free(con);
360 return;
361 }
362 }
363
364 #ifdef HAVE_TCPD_H
365 /*
366 * See if the connection is denied by TCP wrappers...
367 */
368
369 request_init(&wrap_req, RQ_DAEMON, "cupsd", RQ_FILE, con->http.fd, NULL);
370 fromhost(&wrap_req);
371
372 if (!hosts_access(&wrap_req))
373 {
374 #ifdef WIN32
375 closesocket(con->http.fd);
376 #else
377 close(con->http.fd);
378 #endif /* WIN32 */
379
380 cupsdLogMessage(CUPSD_LOG_WARN,
381 "Connection from %s refused by /etc/hosts.allow and "
382 "/etc/hosts.deny rules.", con->http.hostname);
383 free(con);
384 return;
385 }
386 #endif /* HAVE_TCPD_H */
387
388 #ifdef AF_INET6
389 if (con->http.hostaddr->addr.sa_family == AF_INET6)
390 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s:%d (IPv6)",
391 con->http.fd, con->http.hostname,
392 ntohs(con->http.hostaddr->ipv6.sin6_port));
393 else
394 #endif /* AF_INET6 */
395 #ifdef AF_LOCAL
396 if (con->http.hostaddr->addr.sa_family == AF_LOCAL)
397 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s (Domain)",
398 con->http.fd, con->http.hostname);
399 else
400 #endif /* AF_LOCAL */
401 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s:%d (IPv4)",
402 con->http.fd, con->http.hostname,
403 ntohs(con->http.hostaddr->ipv4.sin_port));
404
405 /*
406 * Get the local address the client connected to...
407 */
408
409 addrlen = sizeof(temp);
410 if (getsockname(con->http.fd, (struct sockaddr *)&temp, &addrlen))
411 {
412 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to get local address - %s",
413 strerror(errno));
414
415 strcpy(con->servername, "localhost");
416 con->serverport = LocalPort;
417 }
418 else
419 {
420 #ifdef AF_INET6
421 if (temp.addr.sa_family == AF_INET6)
422 {
423 if (httpAddrLocalhost(&temp))
424 strlcpy(con->servername, "localhost", sizeof(con->servername));
425 else if (HostNameLookups || RemotePort)
426 httpAddrLookup(&temp, con->servername, sizeof(con->servername));
427 else
428 httpAddrString(&temp, con->servername, sizeof(con->servername));
429
430 con->serverport = ntohs(lis->address.ipv6.sin6_port);
431 }
432 else
433 #endif /* AF_INET6 */
434 if (temp.addr.sa_family == AF_INET)
435 {
436 if (httpAddrLocalhost(&temp))
437 strlcpy(con->servername, "localhost", sizeof(con->servername));
438 else if (HostNameLookups || RemotePort)
439 httpAddrLookup(&temp, con->servername, sizeof(con->servername));
440 else
441 httpAddrString(&temp, con->servername, sizeof(con->servername));
442
443 con->serverport = ntohs(lis->address.ipv4.sin_port);
444 }
445 else
446 {
447 strcpy(con->servername, "localhost");
448 con->serverport = LocalPort;
449 }
450 }
451
452 cupsArrayAdd(Clients, con);
453
454 /*
455 * Using TCP_NODELAY improves responsiveness, especially on systems with a slow
456 * loopback interface. Since we write large buffers when sending print files
457 * and requests there shouldn't be any performance penalty for this...
458 */
459
460 val = 1;
461 setsockopt(con->http.fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
462
463 /*
464 * Close this file on all execs...
465 */
466
467 fcntl(con->http.fd, F_SETFD, fcntl(con->http.fd, F_GETFD) | FD_CLOEXEC);
468
469 /*
470 * Add the socket to the server select.
471 */
472
473 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
474
475 /*
476 * Temporarily suspend accept()'s until we lose a client...
477 */
478
479 if (cupsArrayCount(Clients) == MaxClients)
480 cupsdPauseListening();
481
482 #ifdef HAVE_SSL
483 /*
484 * See if we are connecting on a secure port...
485 */
486
487 if (lis->encryption == HTTP_ENCRYPT_ALWAYS)
488 {
489 /*
490 * https connection; go secure...
491 */
492
493 con->http.encryption = HTTP_ENCRYPT_ALWAYS;
494
495 if (!encrypt_client(con))
496 cupsdCloseClient(con);
497 }
498 else
499 con->auto_ssl = 1;
500 #endif /* HAVE_SSL */
501 }
502
503
504 /*
505 * 'cupsdCloseAllClients()' - Close all remote clients immediately.
506 */
507
508 void
509 cupsdCloseAllClients(void)
510 {
511 cupsd_client_t *con; /* Current client */
512
513
514 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCloseAllClients() Clients=%d",
515 cupsArrayCount(Clients));
516
517 for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
518 con;
519 con = (cupsd_client_t *)cupsArrayNext(Clients))
520 if (cupsdCloseClient(con))
521 cupsdCloseClient(con);
522 }
523
524
525 /*
526 * 'cupsdCloseClient()' - Close a remote client.
527 */
528
529 int /* O - 1 if partial close, 0 if fully closed */
530 cupsdCloseClient(cupsd_client_t *con) /* I - Client to close */
531 {
532 int partial; /* Do partial close for SSL? */
533 #ifdef HAVE_LIBSSL
534 SSL_CTX *context; /* Context for encryption */
535 SSL *conn; /* Connection for encryption */
536 unsigned long error; /* Error code */
537 #elif defined(HAVE_GNUTLS)
538 http_tls_t *conn; /* TLS connection information */
539 int error; /* Error code */
540 gnutls_certificate_server_credentials *credentials;
541 /* TLS credentials */
542 # elif defined(HAVE_CDSASSL)
543 http_tls_t *conn; /* CDSA connection information */
544 #endif /* HAVE_LIBSSL */
545
546
547 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdCloseClient: %d", con->http.fd);
548
549 /*
550 * Flush pending writes before closing...
551 */
552
553 httpFlushWrite(HTTP(con));
554
555 partial = 0;
556
557 #ifdef HAVE_SSL
558 /*
559 * Shutdown encryption as needed...
560 */
561
562 if (con->http.tls)
563 {
564 partial = 1;
565
566 # ifdef HAVE_LIBSSL
567 conn = (SSL *)(con->http.tls);
568 context = SSL_get_SSL_CTX(conn);
569
570 switch (SSL_shutdown(conn))
571 {
572 case 1 :
573 cupsdLogMessage(CUPSD_LOG_DEBUG,
574 "SSL shutdown successful!");
575 break;
576 case -1 :
577 cupsdLogMessage(CUPSD_LOG_ERROR,
578 "Fatal error during SSL shutdown!");
579 default :
580 while ((error = ERR_get_error()) != 0)
581 cupsdLogMessage(CUPSD_LOG_ERROR, "SSL shutdown failed: %s",
582 ERR_error_string(error, NULL));
583 break;
584 }
585
586 SSL_CTX_free(context);
587 SSL_free(conn);
588
589 # elif defined(HAVE_GNUTLS)
590 conn = (http_tls_t *)(con->http.tls);
591 credentials = (gnutls_certificate_server_credentials *)(conn->credentials);
592
593 error = gnutls_bye(conn->session, GNUTLS_SHUT_WR);
594 switch (error)
595 {
596 case GNUTLS_E_SUCCESS:
597 cupsdLogMessage(CUPSD_LOG_DEBUG,
598 "SSL shutdown successful!");
599 break;
600 default:
601 cupsdLogMessage(CUPSD_LOG_ERROR,
602 "SSL shutdown failed: %s", gnutls_strerror(error));
603 break;
604 }
605
606 gnutls_deinit(conn->session);
607 gnutls_certificate_free_credentials(*credentials);
608 free(credentials);
609 free(conn);
610
611 # elif defined(HAVE_CDSASSL)
612 conn = (http_tls_t *)(con->http.tls);
613
614 while (SSLClose(conn->session) == errSSLWouldBlock)
615 usleep(1000);
616
617 SSLDisposeContext(conn->session);
618
619 if (conn->certsArray)
620 CFRelease(conn->certsArray);
621
622 free(conn);
623 # endif /* HAVE_LIBSSL */
624
625 con->http.tls = NULL;
626 }
627 #endif /* HAVE_SSL */
628
629 if (con->pipe_pid != 0)
630 {
631 /*
632 * Stop any CGI process...
633 */
634
635 cupsdEndProcess(con->pipe_pid, 1);
636 con->pipe_pid = 0;
637 }
638
639 if (con->file >= 0)
640 {
641 cupsdRemoveSelect(con->file);
642
643 close(con->file);
644 con->file = -1;
645 }
646
647 /*
648 * Close the socket and clear the file from the input set for select()...
649 */
650
651 if (con->http.fd >= 0)
652 {
653 cupsArrayRemove(ActiveClients, con);
654 cupsdSetBusyState();
655
656 if (partial)
657 {
658 /*
659 * Only do a partial close so that the encrypted client gets everything.
660 */
661
662 shutdown(con->http.fd, 0);
663 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
664 }
665 else
666 {
667 /*
668 * Shut the socket down fully...
669 */
670
671 cupsdRemoveSelect(con->http.fd);
672 close(con->http.fd);
673 con->http.fd = -1;
674 }
675 }
676
677 if (!partial)
678 {
679 /*
680 * Free memory...
681 */
682
683 if (con->http.input_set)
684 free(con->http.input_set);
685
686 httpClearCookie(HTTP(con));
687 httpClearFields(HTTP(con));
688
689 cupsdClearString(&con->filename);
690 cupsdClearString(&con->command);
691 cupsdClearString(&con->options);
692 cupsdClearString(&con->query_string);
693
694 if (con->request)
695 {
696 ippDelete(con->request);
697 con->request = NULL;
698 }
699
700 if (con->response)
701 {
702 ippDelete(con->response);
703 con->response = NULL;
704 }
705
706 if (con->language)
707 {
708 cupsLangFree(con->language);
709 con->language = NULL;
710 }
711
712 #ifdef HAVE_AUTHORIZATION_H
713 if (con->authref)
714 {
715 AuthorizationFree(con->authref, kAuthorizationFlagDefaults);
716 con->authref = NULL;
717 }
718 #endif /* HAVE_AUTHORIZATION_H */
719
720 /*
721 * Re-enable new client connections if we are going back under the
722 * limit...
723 */
724
725 if (cupsArrayCount(Clients) == MaxClients)
726 cupsdResumeListening();
727
728 /*
729 * Compact the list of clients as necessary...
730 */
731
732 cupsArrayRemove(Clients, con);
733
734 free(con);
735 }
736
737 return (partial);
738 }
739
740
741 /*
742 * 'cupsdFlushHeader()' - Flush the header fields to the client.
743 */
744
745 int /* I - Bytes written or -1 on error */
746 cupsdFlushHeader(cupsd_client_t *con) /* I - Client to flush to */
747 {
748 int bytes = httpFlushWrite(HTTP(con));
749
750 con->http.data_encoding = HTTP_ENCODE_LENGTH;
751
752 return (bytes);
753 }
754
755
756 /*
757 * 'cupsdReadClient()' - Read data from a client.
758 */
759
760 void
761 cupsdReadClient(cupsd_client_t *con) /* I - Client to read from */
762 {
763 char line[32768], /* Line from client... */
764 operation[64], /* Operation code from socket */
765 version[64], /* HTTP version number string */
766 locale[64], /* Locale */
767 *ptr; /* Pointer into strings */
768 int major, minor; /* HTTP version numbers */
769 http_status_t status; /* Transfer status */
770 ipp_state_t ipp_state; /* State of IPP transfer */
771 int bytes; /* Number of bytes to POST */
772 char *filename; /* Name of file for GET/HEAD */
773 char buf[1024]; /* Buffer for real filename */
774 struct stat filestats; /* File information */
775 mime_type_t *type; /* MIME type of file */
776 cupsd_printer_t *p; /* Printer */
777 static unsigned request_id = 0; /* Request ID for temp files */
778
779
780 status = HTTP_CONTINUE;
781
782 cupsdLogMessage(CUPSD_LOG_DEBUG2,
783 "cupsdReadClient(con=%p(%d)) "
784 "con->http.error=%d "
785 "con->http.used=%d, "
786 "con->http.state=%d "
787 "con->data_encoding=HTTP_ENCODE_%s, "
788 "con->data_remaining=" CUPS_LLFMT ", "
789 "con->file=%d",
790 con, con->http.fd, con->http.error, con->http.used,
791 con->http.state,
792 con->http.data_encoding == HTTP_ENCODE_CHUNKED ?
793 "CHUNKED" : "LENGTH",
794 CUPS_LLCAST con->http.data_remaining, con->file);
795
796 #ifdef HAVE_SSL
797 if (con->auto_ssl)
798 {
799 /*
800 * Automatically check for a SSL/TLS handshake...
801 */
802
803 con->auto_ssl = 0;
804
805 if (recv(con->http.fd, buf, 1, MSG_PEEK) == 1 &&
806 (!buf[0] || !strchr("DGHOPT", buf[0])))
807 {
808 /*
809 * Encrypt this connection...
810 */
811
812 cupsdLogMessage(CUPSD_LOG_DEBUG2,
813 "cupsdReadClient: Saw first byte %02X, auto-negotiating "
814 "SSL/TLS session...", buf[0] & 255);
815
816 if (!encrypt_client(con))
817 cupsdCloseClient(con);
818
819 return;
820 }
821 }
822 #endif /* HAVE_SSL */
823
824 switch (con->http.state)
825 {
826 case HTTP_WAITING :
827 /*
828 * See if we've received a request line...
829 */
830
831 if (httpGets(line, sizeof(line) - 1, HTTP(con)) == NULL)
832 {
833 if (con->http.error && con->http.error != EPIPE)
834 cupsdLogMessage(CUPSD_LOG_DEBUG,
835 "cupsdReadClient: %d WAITING Closing for error %d "
836 "(%s)", con->http.fd, con->http.error,
837 strerror(con->http.error));
838 else
839 cupsdLogMessage(CUPSD_LOG_DEBUG,
840 "cupsdReadClient: %d WAITING Closing on EOF",
841 con->http.fd);
842
843 cupsdCloseClient(con);
844 return;
845 }
846
847 /*
848 * Ignore blank request lines...
849 */
850
851 if (line[0] == '\0')
852 break;
853
854 /*
855 * Clear other state variables...
856 */
857
858 httpClearFields(HTTP(con));
859
860 con->http.activity = time(NULL);
861 con->http.version = HTTP_1_0;
862 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
863 con->http.data_encoding = HTTP_ENCODE_LENGTH;
864 con->http.data_remaining = 0;
865 con->http._data_remaining = 0;
866 con->operation = HTTP_WAITING;
867 con->bytes = 0;
868 con->file = -1;
869 con->file_ready = 0;
870 con->pipe_pid = 0;
871 con->username[0] = '\0';
872 con->password[0] = '\0';
873 con->uri[0] = '\0';
874
875 cupsdClearString(&con->command);
876 cupsdClearString(&con->options);
877 cupsdClearString(&con->query_string);
878
879 if (con->request)
880 {
881 ippDelete(con->request);
882 con->request = NULL;
883 }
884
885 if (con->response)
886 {
887 ippDelete(con->response);
888 con->response = NULL;
889 }
890
891 if (con->language)
892 {
893 cupsLangFree(con->language);
894 con->language = NULL;
895 }
896
897 #ifdef HAVE_GSSAPI
898 {
899 OM_uint32 minor_status;
900 gss_release_cred(&minor_status, &con->gss_creds);
901 }
902 #endif /* HAVE_GSSAPI */
903
904 /*
905 * Grab the request line...
906 */
907
908 switch (sscanf(line, "%63s%1023s%63s", operation, con->uri, version))
909 {
910 case 1 :
911 if (line[0])
912 {
913 cupsdLogMessage(CUPSD_LOG_ERROR,
914 "Bad request line \"%s\" from %s!", line,
915 con->http.hostname);
916 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
917 cupsdCloseClient(con);
918 }
919 return;
920 case 2 :
921 con->http.version = HTTP_0_9;
922 break;
923 case 3 :
924 if (sscanf(version, "HTTP/%d.%d", &major, &minor) != 2)
925 {
926 cupsdLogMessage(CUPSD_LOG_ERROR,
927 "Bad request line \"%s\" from %s!", line,
928 con->http.hostname);
929 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
930 cupsdCloseClient(con);
931 return;
932 }
933
934 if (major < 2)
935 {
936 con->http.version = (http_version_t)(major * 100 + minor);
937 if (con->http.version == HTTP_1_1 && KeepAlive)
938 con->http.keep_alive = HTTP_KEEPALIVE_ON;
939 else
940 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
941 }
942 else
943 {
944 cupsdLogMessage(CUPSD_LOG_ERROR,
945 "Unsupported request line \"%s\" from %s!",
946 line, con->http.hostname);
947 cupsdSendError(con, HTTP_NOT_SUPPORTED, CUPSD_AUTH_NONE);
948 cupsdCloseClient(con);
949 return;
950 }
951 break;
952 }
953
954 /*
955 * Handle full URLs in the request line...
956 */
957
958 if (strcmp(con->uri, "*"))
959 {
960 char scheme[HTTP_MAX_URI], /* Method/scheme */
961 userpass[HTTP_MAX_URI], /* Username:password */
962 hostname[HTTP_MAX_URI], /* Hostname */
963 resource[HTTP_MAX_URI]; /* Resource path */
964 int port; /* Port number */
965
966
967 /*
968 * Separate the URI into its components...
969 */
970
971 httpSeparateURI(HTTP_URI_CODING_MOST, con->uri,
972 scheme, sizeof(scheme),
973 userpass, sizeof(userpass),
974 hostname, sizeof(hostname), &port,
975 resource, sizeof(resource));
976
977 /*
978 * Only allow URIs with the servername, localhost, or an IP
979 * address...
980 */
981
982 if (strcmp(scheme, "file") &&
983 strcasecmp(hostname, ServerName) &&
984 strcasecmp(hostname, "localhost") &&
985 !isdigit(hostname[0]) && hostname[0] != '[')
986 {
987 /*
988 * Nope, we don't do proxies...
989 */
990
991 cupsdLogMessage(CUPSD_LOG_ERROR, "Bad URI \"%s\" in request!",
992 con->uri);
993 cupsdSendError(con, HTTP_METHOD_NOT_ALLOWED, CUPSD_AUTH_NONE);
994 cupsdCloseClient(con);
995 return;
996 }
997
998 /*
999 * Copy the resource portion back into the URI; both resource and
1000 * con->uri are HTTP_MAX_URI bytes in size...
1001 */
1002
1003 strcpy(con->uri, resource);
1004 }
1005
1006 /*
1007 * Process the request...
1008 */
1009
1010 if (!strcmp(operation, "GET"))
1011 con->http.state = HTTP_GET;
1012 else if (!strcmp(operation, "PUT"))
1013 con->http.state = HTTP_PUT;
1014 else if (!strcmp(operation, "POST"))
1015 con->http.state = HTTP_POST;
1016 else if (!strcmp(operation, "DELETE"))
1017 con->http.state = HTTP_DELETE;
1018 else if (!strcmp(operation, "TRACE"))
1019 con->http.state = HTTP_TRACE;
1020 else if (!strcmp(operation, "OPTIONS"))
1021 con->http.state = HTTP_OPTIONS;
1022 else if (!strcmp(operation, "HEAD"))
1023 con->http.state = HTTP_HEAD;
1024 else
1025 {
1026 cupsdLogMessage(CUPSD_LOG_ERROR, "Bad operation \"%s\"!", operation);
1027 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
1028 cupsdCloseClient(con);
1029 return;
1030 }
1031
1032 gettimeofday(&(con->start), NULL);
1033 con->operation = con->http.state;
1034
1035 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdReadClient: %d %s %s HTTP/%d.%d",
1036 con->http.fd, operation, con->uri,
1037 con->http.version / 100, con->http.version % 100);
1038
1039 con->http.status = HTTP_OK;
1040
1041 if (!cupsArrayFind(ActiveClients, con))
1042 {
1043 cupsArrayAdd(ActiveClients, con);
1044 cupsdSetBusyState();
1045 }
1046
1047 case HTTP_OPTIONS :
1048 case HTTP_DELETE :
1049 case HTTP_GET :
1050 case HTTP_HEAD :
1051 case HTTP_POST :
1052 case HTTP_PUT :
1053 case HTTP_TRACE :
1054 /*
1055 * Parse incoming parameters until the status changes...
1056 */
1057
1058 while ((status = httpUpdate(HTTP(con))) == HTTP_CONTINUE)
1059 if (!data_ready(con))
1060 break;
1061
1062 if (status != HTTP_OK && status != HTTP_CONTINUE)
1063 {
1064 if (con->http.error && con->http.error != EPIPE)
1065 cupsdLogMessage(CUPSD_LOG_DEBUG,
1066 "cupsdReadClient: %d FIELDS Closing for error %d "
1067 "(%s)", con->http.fd, con->http.error,
1068 strerror(con->http.error));
1069 else
1070 cupsdLogMessage(CUPSD_LOG_DEBUG,
1071 "cupsdReadClient: %d FIELDS Closing on EOF",
1072 con->http.fd);
1073
1074 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
1075 cupsdCloseClient(con);
1076 return;
1077 }
1078 break;
1079
1080 default :
1081 if (!data_ready(con) && recv(con->http.fd, buf, 1, MSG_PEEK) < 1)
1082 {
1083 /*
1084 * Connection closed...
1085 */
1086
1087 cupsdLogMessage(CUPSD_LOG_DEBUG,
1088 "cupsdReadClient: %d Closing on EOF", con->http.fd);
1089 cupsdCloseClient(con);
1090 return;
1091 }
1092 break; /* Anti-compiler-warning-code */
1093 }
1094
1095 /*
1096 * Handle new transfers...
1097 */
1098
1099 if (status == HTTP_OK)
1100 {
1101 if (con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE][0])
1102 {
1103 /*
1104 * Figure out the locale from the Accept-Language and Content-Type
1105 * fields...
1106 */
1107
1108 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE],
1109 ',')) != NULL)
1110 *ptr = '\0';
1111
1112 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE],
1113 ';')) != NULL)
1114 *ptr = '\0';
1115
1116 if ((ptr = strstr(con->http.fields[HTTP_FIELD_CONTENT_TYPE],
1117 "charset=")) != NULL)
1118 {
1119 /*
1120 * Combine language and charset, and trim any extra params in the
1121 * content-type.
1122 */
1123
1124 snprintf(locale, sizeof(locale), "%s.%s",
1125 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], ptr + 8);
1126
1127 if ((ptr = strchr(locale, ',')) != NULL)
1128 *ptr = '\0';
1129 }
1130 else
1131 snprintf(locale, sizeof(locale), "%s.%s",
1132 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], DefaultCharset);
1133
1134 con->language = cupsLangGet(locale);
1135 }
1136 else
1137 con->language = cupsLangGet(DefaultLocale);
1138
1139 cupsdAuthorize(con);
1140
1141 if (!strncasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Keep-Alive",
1142 10) && KeepAlive)
1143 con->http.keep_alive = HTTP_KEEPALIVE_ON;
1144 else if (!strncasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "close", 5))
1145 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1146
1147 if (!con->http.fields[HTTP_FIELD_HOST][0] &&
1148 con->http.version >= HTTP_1_1)
1149 {
1150 /*
1151 * HTTP/1.1 and higher require the "Host:" field...
1152 */
1153
1154 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1155 {
1156 cupsdLogMessage(CUPSD_LOG_ERROR, "Missing Host: field in request!");
1157 cupsdCloseClient(con);
1158 return;
1159 }
1160 }
1161 else if (!valid_host(con))
1162 {
1163 /*
1164 * Access to localhost must use "localhost" or the corresponding IPv4
1165 * or IPv6 values in the Host: field.
1166 */
1167
1168 cupsdLogMessage(CUPSD_LOG_ERROR,
1169 "Request from \"%s\" using invalid Host: field \"%s\"",
1170 con->http.hostname, con->http.fields[HTTP_FIELD_HOST]);
1171
1172 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1173 {
1174 cupsdCloseClient(con);
1175 return;
1176 }
1177 }
1178 else if (con->operation == HTTP_OPTIONS)
1179 {
1180 /*
1181 * Do OPTIONS command...
1182 */
1183
1184 if (con->best && con->best->type != CUPSD_AUTH_NONE)
1185 {
1186 if (!cupsdSendHeader(con, HTTP_UNAUTHORIZED, NULL, CUPSD_AUTH_NONE))
1187 {
1188 cupsdCloseClient(con);
1189 return;
1190 }
1191 }
1192
1193 if (!strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Upgrade") &&
1194 con->http.tls == NULL)
1195 {
1196 #ifdef HAVE_SSL
1197 /*
1198 * Do encryption stuff...
1199 */
1200
1201 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL, CUPSD_AUTH_NONE))
1202 {
1203 cupsdCloseClient(con);
1204 return;
1205 }
1206
1207 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1208 httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n");
1209 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1210 httpPrintf(HTTP(con), "\r\n");
1211
1212 if (cupsdFlushHeader(con) < 0)
1213 {
1214 cupsdCloseClient(con);
1215 return;
1216 }
1217
1218 if (!encrypt_client(con))
1219 {
1220 cupsdCloseClient(con);
1221 return;
1222 }
1223 #else
1224 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE))
1225 {
1226 cupsdCloseClient(con);
1227 return;
1228 }
1229 #endif /* HAVE_SSL */
1230 }
1231
1232 if (!cupsdSendHeader(con, HTTP_OK, NULL, CUPSD_AUTH_NONE))
1233 {
1234 cupsdCloseClient(con);
1235 return;
1236 }
1237
1238 httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST, PUT\r\n");
1239 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1240 httpPrintf(HTTP(con), "\r\n");
1241
1242 if (cupsdFlushHeader(con) < 0)
1243 {
1244 cupsdCloseClient(con);
1245 return;
1246 }
1247 }
1248 else if (!is_path_absolute(con->uri))
1249 {
1250 /*
1251 * Protect against malicious users!
1252 */
1253
1254 cupsdLogMessage(CUPSD_LOG_ERROR,
1255 "Request for non-absolute resource \"%s\"!", con->uri);
1256
1257 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1258 {
1259 cupsdCloseClient(con);
1260 return;
1261 }
1262 }
1263 else
1264 {
1265 if (!strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Upgrade") &&
1266 con->http.tls == NULL)
1267 {
1268 #ifdef HAVE_SSL
1269 /*
1270 * Do encryption stuff...
1271 */
1272
1273 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL, CUPSD_AUTH_NONE))
1274 {
1275 cupsdCloseClient(con);
1276 return;
1277 }
1278
1279 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1280 httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n");
1281 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1282 httpPrintf(HTTP(con), "\r\n");
1283
1284 if (cupsdFlushHeader(con) < 0)
1285 {
1286 cupsdCloseClient(con);
1287 return;
1288 }
1289
1290 if (!encrypt_client(con))
1291 {
1292 cupsdCloseClient(con);
1293 return;
1294 }
1295 #else
1296 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE))
1297 {
1298 cupsdCloseClient(con);
1299 return;
1300 }
1301 #endif /* HAVE_SSL */
1302 }
1303
1304 if ((status = cupsdIsAuthorized(con, NULL)) != HTTP_OK)
1305 {
1306 cupsdSendError(con, status, CUPSD_AUTH_NONE);
1307 cupsdCloseClient(con);
1308 return;
1309 }
1310
1311 if (con->http.expect &&
1312 (con->operation == HTTP_POST || con->operation == HTTP_PUT))
1313 {
1314 if (con->http.expect == HTTP_CONTINUE)
1315 {
1316 /*
1317 * Send 100-continue header...
1318 */
1319
1320 if (!cupsdSendHeader(con, HTTP_CONTINUE, NULL, CUPSD_AUTH_NONE))
1321 {
1322 cupsdCloseClient(con);
1323 return;
1324 }
1325 }
1326 else
1327 {
1328 /*
1329 * Send 417-expectation-failed header...
1330 */
1331
1332 if (!cupsdSendHeader(con, HTTP_EXPECTATION_FAILED, NULL,
1333 CUPSD_AUTH_NONE))
1334 {
1335 cupsdCloseClient(con);
1336 return;
1337 }
1338
1339 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1340 httpPrintf(HTTP(con), "\r\n");
1341
1342 if (cupsdFlushHeader(con) < 0)
1343 {
1344 cupsdCloseClient(con);
1345 return;
1346 }
1347 }
1348 }
1349
1350 switch (con->http.state)
1351 {
1352 case HTTP_GET_SEND :
1353 if (!strncmp(con->uri, "/printers/", 10) &&
1354 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1355 {
1356 /*
1357 * Send PPD file - get the real printer name since printer
1358 * names are not case sensitive but filenames can be...
1359 */
1360
1361 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1362
1363 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1364 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1365 else
1366 {
1367 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1368 {
1369 cupsdCloseClient(con);
1370 return;
1371 }
1372
1373 break;
1374 }
1375 }
1376
1377 if ((!strncmp(con->uri, "/admin", 6) &&
1378 strncmp(con->uri, "/admin/conf/", 12) &&
1379 strncmp(con->uri, "/admin/log/", 11)) ||
1380 !strncmp(con->uri, "/printers", 9) ||
1381 !strncmp(con->uri, "/classes", 8) ||
1382 !strncmp(con->uri, "/help", 5) ||
1383 !strncmp(con->uri, "/jobs", 5))
1384 {
1385 /*
1386 * Send CGI output...
1387 */
1388
1389 if (!strncmp(con->uri, "/admin", 6))
1390 {
1391 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1392 ServerBin);
1393
1394 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1395 }
1396 else if (!strncmp(con->uri, "/printers", 9))
1397 {
1398 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1399 ServerBin);
1400
1401 if (con->uri[9] && con->uri[10])
1402 cupsdSetString(&con->options, con->uri + 9);
1403 else
1404 cupsdSetString(&con->options, NULL);
1405 }
1406 else if (!strncmp(con->uri, "/classes", 8))
1407 {
1408 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1409 ServerBin);
1410
1411 if (con->uri[8] && con->uri[9])
1412 cupsdSetString(&con->options, con->uri + 8);
1413 else
1414 cupsdSetString(&con->options, NULL);
1415 }
1416 else if (!strncmp(con->uri, "/jobs", 5))
1417 {
1418 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1419 ServerBin);
1420
1421 if (con->uri[5] && con->uri[6])
1422 cupsdSetString(&con->options, con->uri + 5);
1423 else
1424 cupsdSetString(&con->options, NULL);
1425 }
1426 else
1427 {
1428 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1429 ServerBin);
1430
1431 if (con->uri[5] && con->uri[6])
1432 cupsdSetString(&con->options, con->uri + 5);
1433 else
1434 cupsdSetString(&con->options, NULL);
1435 }
1436
1437 if (!cupsdSendCommand(con, con->command, con->options, 0))
1438 {
1439 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1440 {
1441 cupsdCloseClient(con);
1442 return;
1443 }
1444 }
1445 else
1446 cupsdLogRequest(con, HTTP_OK);
1447
1448 if (con->http.version <= HTTP_1_0)
1449 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1450 }
1451 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1452 (strchr(con->uri + 12, '/') ||
1453 strlen(con->uri) == 12)) ||
1454 (!strncmp(con->uri, "/admin/log/", 11) &&
1455 (strchr(con->uri + 11, '/') ||
1456 strlen(con->uri) == 11)))
1457 {
1458 /*
1459 * GET can only be done to configuration files directly under
1460 * /admin/conf...
1461 */
1462
1463 cupsdLogMessage(CUPSD_LOG_ERROR,
1464 "Request for subdirectory \"%s\"!", con->uri);
1465
1466 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1467 {
1468 cupsdCloseClient(con);
1469 return;
1470 }
1471
1472 break;
1473 }
1474 else
1475 {
1476 /*
1477 * Serve a file...
1478 */
1479
1480 if ((filename = get_file(con, &filestats, buf,
1481 sizeof(buf))) == NULL)
1482 {
1483 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1484 {
1485 cupsdCloseClient(con);
1486 return;
1487 }
1488
1489 break;
1490 }
1491
1492 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1493
1494 if (is_cgi(con, filename, &filestats, type))
1495 {
1496 /*
1497 * Note: con->command and con->options were set by
1498 * is_cgi()...
1499 */
1500
1501 if (!cupsdSendCommand(con, con->command, con->options, 0))
1502 {
1503 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1504 {
1505 cupsdCloseClient(con);
1506 return;
1507 }
1508 }
1509 else
1510 cupsdLogRequest(con, HTTP_OK);
1511
1512 if (con->http.version <= HTTP_1_0)
1513 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1514 break;
1515 }
1516
1517 if (!check_if_modified(con, &filestats))
1518 {
1519 if (!cupsdSendError(con, HTTP_NOT_MODIFIED, CUPSD_AUTH_NONE))
1520 {
1521 cupsdCloseClient(con);
1522 return;
1523 }
1524 }
1525 else
1526 {
1527 if (type == NULL)
1528 strcpy(line, "text/plain");
1529 else
1530 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1531
1532 if (!write_file(con, HTTP_OK, filename, line, &filestats))
1533 {
1534 cupsdCloseClient(con);
1535 return;
1536 }
1537 }
1538 }
1539 break;
1540
1541 case HTTP_POST_RECV :
1542 /*
1543 * See if the POST request includes a Content-Length field, and if
1544 * so check the length against any limits that are set...
1545 */
1546
1547 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1548 MaxRequestSize > 0 &&
1549 con->http.data_remaining > MaxRequestSize)
1550 {
1551 /*
1552 * Request too large...
1553 */
1554
1555 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1556 {
1557 cupsdCloseClient(con);
1558 return;
1559 }
1560
1561 break;
1562 }
1563 else if (con->http.data_remaining < 0 ||
1564 (!con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1565 con->http.data_encoding == HTTP_ENCODE_LENGTH))
1566 {
1567 /*
1568 * Negative content lengths are invalid!
1569 */
1570
1571 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1572 {
1573 cupsdCloseClient(con);
1574 return;
1575 }
1576
1577 break;
1578 }
1579
1580 /*
1581 * See what kind of POST request this is; for IPP requests the
1582 * content-type field will be "application/ipp"...
1583 */
1584
1585 if (!strcmp(con->http.fields[HTTP_FIELD_CONTENT_TYPE],
1586 "application/ipp"))
1587 con->request = ippNew();
1588 else if ((!strncmp(con->uri, "/admin", 6) &&
1589 strncmp(con->uri, "/admin/conf/", 12) &&
1590 strncmp(con->uri, "/admin/log/", 11)) ||
1591 !strncmp(con->uri, "/printers", 9) ||
1592 !strncmp(con->uri, "/classes", 8) ||
1593 !strncmp(con->uri, "/help", 5) ||
1594 !strncmp(con->uri, "/jobs", 5))
1595 {
1596 /*
1597 * CGI request...
1598 */
1599
1600 if (!strncmp(con->uri, "/admin", 6))
1601 {
1602 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1603 ServerBin);
1604
1605 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1606 }
1607 else if (!strncmp(con->uri, "/printers", 9))
1608 {
1609 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1610 ServerBin);
1611
1612 if (con->uri[9] && con->uri[10])
1613 cupsdSetString(&con->options, con->uri + 9);
1614 else
1615 cupsdSetString(&con->options, NULL);
1616 }
1617 else if (!strncmp(con->uri, "/classes", 8))
1618 {
1619 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1620 ServerBin);
1621
1622 if (con->uri[8] && con->uri[9])
1623 cupsdSetString(&con->options, con->uri + 8);
1624 else
1625 cupsdSetString(&con->options, NULL);
1626 }
1627 else if (!strncmp(con->uri, "/jobs", 5))
1628 {
1629 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1630 ServerBin);
1631
1632 if (con->uri[5] && con->uri[6])
1633 cupsdSetString(&con->options, con->uri + 5);
1634 else
1635 cupsdSetString(&con->options, NULL);
1636 }
1637 else
1638 {
1639 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1640 ServerBin);
1641
1642 if (con->uri[5] && con->uri[6])
1643 cupsdSetString(&con->options, con->uri + 5);
1644 else
1645 cupsdSetString(&con->options, NULL);
1646 }
1647
1648 if (con->http.version <= HTTP_1_0)
1649 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1650 }
1651 else
1652 {
1653 /*
1654 * POST to a file...
1655 */
1656
1657 if ((filename = get_file(con, &filestats, buf,
1658 sizeof(buf))) == NULL)
1659 {
1660 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1661 {
1662 cupsdCloseClient(con);
1663 return;
1664 }
1665
1666 break;
1667 }
1668
1669 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1670
1671 if (!is_cgi(con, filename, &filestats, type))
1672 {
1673 /*
1674 * Only POST to CGI's...
1675 */
1676
1677 if (!cupsdSendError(con, HTTP_UNAUTHORIZED, CUPSD_AUTH_NONE))
1678 {
1679 cupsdCloseClient(con);
1680 return;
1681 }
1682 }
1683 }
1684 break;
1685
1686 case HTTP_PUT_RECV :
1687 /*
1688 * Validate the resource name...
1689 */
1690
1691 if (strncmp(con->uri, "/admin/conf/", 12) ||
1692 strchr(con->uri + 12, '/') ||
1693 strlen(con->uri) == 12)
1694 {
1695 /*
1696 * PUT can only be done to configuration files under
1697 * /admin/conf...
1698 */
1699
1700 cupsdLogMessage(CUPSD_LOG_ERROR,
1701 "Request for subdirectory \"%s\"!", con->uri);
1702
1703 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1704 {
1705 cupsdCloseClient(con);
1706 return;
1707 }
1708
1709 break;
1710 }
1711
1712 /*
1713 * See if the PUT request includes a Content-Length field, and if
1714 * so check the length against any limits that are set...
1715 */
1716
1717 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1718 MaxRequestSize > 0 &&
1719 con->http.data_remaining > MaxRequestSize)
1720 {
1721 /*
1722 * Request too large...
1723 */
1724
1725 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1726 {
1727 cupsdCloseClient(con);
1728 return;
1729 }
1730
1731 break;
1732 }
1733 else if (con->http.data_remaining < 0)
1734 {
1735 /*
1736 * Negative content lengths are invalid!
1737 */
1738
1739 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1740 {
1741 cupsdCloseClient(con);
1742 return;
1743 }
1744
1745 break;
1746 }
1747
1748 /*
1749 * Open a temporary file to hold the request...
1750 */
1751
1752 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot,
1753 request_id ++);
1754 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
1755
1756 if (con->file < 0)
1757 {
1758 cupsdLogMessage(CUPSD_LOG_ERROR,
1759 "Unable to create request file %s: %s",
1760 con->filename, strerror(errno));
1761
1762 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1763 {
1764 cupsdCloseClient(con);
1765 return;
1766 }
1767 }
1768
1769 fchmod(con->file, 0640);
1770 fchown(con->file, RunUser, Group);
1771 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
1772 break;
1773
1774 case HTTP_DELETE :
1775 case HTTP_TRACE :
1776 cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE);
1777 cupsdCloseClient(con);
1778 return;
1779
1780 case HTTP_HEAD :
1781 if (!strncmp(con->uri, "/printers/", 10) &&
1782 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1783 {
1784 /*
1785 * Send PPD file - get the real printer name since printer
1786 * names are not case sensitive but filenames can be...
1787 */
1788
1789 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1790
1791 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1792 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1793 else
1794 {
1795 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1796 {
1797 cupsdCloseClient(con);
1798 return;
1799 }
1800
1801 break;
1802 }
1803 }
1804
1805 if ((!strncmp(con->uri, "/admin", 6) &&
1806 strncmp(con->uri, "/admin/conf/", 12) &&
1807 strncmp(con->uri, "/admin/log/", 11)) ||
1808 !strncmp(con->uri, "/printers", 9) ||
1809 !strncmp(con->uri, "/classes", 8) ||
1810 !strncmp(con->uri, "/help", 5) ||
1811 !strncmp(con->uri, "/jobs", 5))
1812 {
1813 /*
1814 * CGI output...
1815 */
1816
1817 if (!cupsdSendHeader(con, HTTP_OK, "text/html", CUPSD_AUTH_NONE))
1818 {
1819 cupsdCloseClient(con);
1820 return;
1821 }
1822
1823 if (httpPrintf(HTTP(con), "\r\n") < 0)
1824 {
1825 cupsdCloseClient(con);
1826 return;
1827 }
1828
1829 if (cupsdFlushHeader(con) < 0)
1830 {
1831 cupsdCloseClient(con);
1832 return;
1833 }
1834
1835 cupsdLogRequest(con, HTTP_OK);
1836 }
1837 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1838 (strchr(con->uri + 12, '/') ||
1839 strlen(con->uri) == 12)) ||
1840 (!strncmp(con->uri, "/admin/log/", 11) &&
1841 (strchr(con->uri + 11, '/') ||
1842 strlen(con->uri) == 11)))
1843 {
1844 /*
1845 * HEAD can only be done to configuration files under
1846 * /admin/conf...
1847 */
1848
1849 cupsdLogMessage(CUPSD_LOG_ERROR,
1850 "Request for subdirectory \"%s\"!", con->uri);
1851
1852 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1853 {
1854 cupsdCloseClient(con);
1855 return;
1856 }
1857
1858 break;
1859 }
1860 else if ((filename = get_file(con, &filestats, buf,
1861 sizeof(buf))) == NULL)
1862 {
1863 if (!cupsdSendHeader(con, HTTP_NOT_FOUND, "text/html",
1864 CUPSD_AUTH_NONE))
1865 {
1866 cupsdCloseClient(con);
1867 return;
1868 }
1869
1870 cupsdLogRequest(con, HTTP_NOT_FOUND);
1871 }
1872 else if (!check_if_modified(con, &filestats))
1873 {
1874 if (!cupsdSendError(con, HTTP_NOT_MODIFIED, CUPSD_AUTH_NONE))
1875 {
1876 cupsdCloseClient(con);
1877 return;
1878 }
1879
1880 cupsdLogRequest(con, HTTP_NOT_MODIFIED);
1881 }
1882 else
1883 {
1884 /*
1885 * Serve a file...
1886 */
1887
1888 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1889 if (type == NULL)
1890 strcpy(line, "text/plain");
1891 else
1892 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1893
1894 if (!cupsdSendHeader(con, HTTP_OK, line, CUPSD_AUTH_NONE))
1895 {
1896 cupsdCloseClient(con);
1897 return;
1898 }
1899
1900 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
1901 httpGetDateString(filestats.st_mtime)) < 0)
1902 {
1903 cupsdCloseClient(con);
1904 return;
1905 }
1906
1907 if (httpPrintf(HTTP(con), "Content-Length: %lu\r\n",
1908 (unsigned long)filestats.st_size) < 0)
1909 {
1910 cupsdCloseClient(con);
1911 return;
1912 }
1913
1914 cupsdLogRequest(con, HTTP_OK);
1915 }
1916
1917 if (httpPrintf(HTTP(con), "\r\n") < 0)
1918 {
1919 cupsdCloseClient(con);
1920 return;
1921 }
1922
1923 if (cupsdFlushHeader(con) < 0)
1924 {
1925 cupsdCloseClient(con);
1926 return;
1927 }
1928
1929 con->http.state = HTTP_WAITING;
1930 break;
1931
1932 default :
1933 break; /* Anti-compiler-warning-code */
1934 }
1935 }
1936 }
1937
1938 /*
1939 * Handle any incoming data...
1940 */
1941
1942 switch (con->http.state)
1943 {
1944 case HTTP_PUT_RECV :
1945 do
1946 {
1947 if ((bytes = httpRead2(HTTP(con), line, sizeof(line))) < 0)
1948 {
1949 if (con->http.error && con->http.error != EPIPE)
1950 cupsdLogMessage(CUPSD_LOG_DEBUG,
1951 "cupsdReadClient: %d PUT_RECV Closing for error "
1952 "%d (%s)", con->http.fd, con->http.error,
1953 strerror(con->http.error));
1954 else
1955 cupsdLogMessage(CUPSD_LOG_DEBUG,
1956 "cupsdReadClient: %d PUT_RECV Closing on EOF",
1957 con->http.fd);
1958
1959 cupsdCloseClient(con);
1960 return;
1961 }
1962 else if (bytes > 0)
1963 {
1964 con->bytes += bytes;
1965
1966 if (write(con->file, line, bytes) < bytes)
1967 {
1968 cupsdLogMessage(CUPSD_LOG_ERROR,
1969 "cupsdReadClient: Unable to write %d bytes to %s: %s",
1970 bytes, con->filename, strerror(errno));
1971
1972 close(con->file);
1973 con->file = -1;
1974 unlink(con->filename);
1975 cupsdClearString(&con->filename);
1976
1977 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1978 {
1979 cupsdCloseClient(con);
1980 return;
1981 }
1982 }
1983 }
1984 }
1985 while (con->http.state == HTTP_PUT_RECV && data_ready(con));
1986
1987 if (con->http.state == HTTP_WAITING)
1988 {
1989 /*
1990 * End of file, see how big it is...
1991 */
1992
1993 fstat(con->file, &filestats);
1994
1995 close(con->file);
1996 con->file = -1;
1997
1998 if (filestats.st_size > MaxRequestSize &&
1999 MaxRequestSize > 0)
2000 {
2001 /*
2002 * Request is too big; remove it and send an error...
2003 */
2004
2005 unlink(con->filename);
2006 cupsdClearString(&con->filename);
2007
2008 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2009 {
2010 cupsdCloseClient(con);
2011 return;
2012 }
2013 }
2014
2015 /*
2016 * Install the configuration file...
2017 */
2018
2019 status = install_conf_file(con);
2020
2021 /*
2022 * Return the status to the client...
2023 */
2024
2025 if (!cupsdSendError(con, status, CUPSD_AUTH_NONE))
2026 {
2027 cupsdCloseClient(con);
2028 return;
2029 }
2030 }
2031 break;
2032
2033 case HTTP_POST_RECV :
2034 do
2035 {
2036 if (con->request && con->file < 0)
2037 {
2038 /*
2039 * Grab any request data from the connection...
2040 */
2041
2042 if ((ipp_state = ippRead(&(con->http), con->request)) == IPP_ERROR)
2043 {
2044 cupsdLogMessage(CUPSD_LOG_ERROR,
2045 "cupsdReadClient: %d IPP Read Error!",
2046 con->http.fd);
2047
2048 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
2049 cupsdCloseClient(con);
2050 return;
2051 }
2052 else if (ipp_state != IPP_DATA)
2053 {
2054 if (con->http.state == HTTP_POST_SEND)
2055 {
2056 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
2057 cupsdCloseClient(con);
2058 return;
2059 }
2060
2061 break;
2062 }
2063 else
2064 {
2065 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdReadClient: %d %d.%d %s %d",
2066 con->http.fd, con->request->request.op.version[0],
2067 con->request->request.op.version[1],
2068 ippOpString(con->request->request.op.operation_id),
2069 con->request->request.op.request_id);
2070 con->bytes += ippLength(con->request);
2071 }
2072 }
2073
2074 if (con->file < 0 && con->http.state != HTTP_POST_SEND)
2075 {
2076 /*
2077 * Create a file as needed for the request data...
2078 */
2079
2080 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot,
2081 request_id ++);
2082 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
2083
2084 if (con->file < 0)
2085 {
2086 cupsdLogMessage(CUPSD_LOG_ERROR,
2087 "Unable to create request file %s: %s",
2088 con->filename, strerror(errno));
2089
2090 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2091 {
2092 cupsdCloseClient(con);
2093 return;
2094 }
2095 }
2096
2097 fchmod(con->file, 0640);
2098 fchown(con->file, RunUser, Group);
2099 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2100 }
2101
2102 if (con->http.state != HTTP_POST_SEND)
2103 {
2104 if ((bytes = httpRead2(HTTP(con), line, sizeof(line))) < 0)
2105 {
2106 if (con->http.error && con->http.error != EPIPE)
2107 cupsdLogMessage(CUPSD_LOG_DEBUG,
2108 "cupsdReadClient: %d POST_SEND Closing for "
2109 "error %d (%s)", con->http.fd, con->http.error,
2110 strerror(con->http.error));
2111 else
2112 cupsdLogMessage(CUPSD_LOG_DEBUG,
2113 "cupsdReadClient: %d POST_SEND Closing on EOF",
2114 con->http.fd);
2115
2116 cupsdCloseClient(con);
2117 return;
2118 }
2119 else if (bytes > 0)
2120 {
2121 con->bytes += bytes;
2122
2123 if (write(con->file, line, bytes) < bytes)
2124 {
2125 cupsdLogMessage(CUPSD_LOG_ERROR,
2126 "cupsdReadClient: Unable to write %d bytes to "
2127 "%s: %s", bytes, con->filename,
2128 strerror(errno));
2129
2130 close(con->file);
2131 con->file = -1;
2132 unlink(con->filename);
2133 cupsdClearString(&con->filename);
2134
2135 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE,
2136 CUPSD_AUTH_NONE))
2137 {
2138 cupsdCloseClient(con);
2139 return;
2140 }
2141 }
2142 }
2143 else if (con->http.state == HTTP_POST_RECV)
2144 return;
2145 else if (con->http.state != HTTP_POST_SEND)
2146 {
2147 cupsdLogMessage(CUPSD_LOG_DEBUG,
2148 "cupsdReadClient: %d Closing on unknown HTTP "
2149 "state %d", con->http.fd, con->http.state);
2150 cupsdCloseClient(con);
2151 return;
2152 }
2153 }
2154 }
2155 while (con->http.state == HTTP_POST_RECV && data_ready(con));
2156
2157 if (con->http.state == HTTP_POST_SEND)
2158 {
2159 if (con->file >= 0)
2160 {
2161 fstat(con->file, &filestats);
2162
2163 close(con->file);
2164 con->file = -1;
2165
2166 if (filestats.st_size > MaxRequestSize &&
2167 MaxRequestSize > 0)
2168 {
2169 /*
2170 * Request is too big; remove it and send an error...
2171 */
2172
2173 unlink(con->filename);
2174 cupsdClearString(&con->filename);
2175
2176 if (con->request)
2177 {
2178 /*
2179 * Delete any IPP request data...
2180 */
2181
2182 ippDelete(con->request);
2183 con->request = NULL;
2184 }
2185
2186 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2187 {
2188 cupsdCloseClient(con);
2189 return;
2190 }
2191 }
2192
2193 if (con->command)
2194 {
2195 if (!cupsdSendCommand(con, con->command, con->options, 0))
2196 {
2197 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
2198 {
2199 cupsdCloseClient(con);
2200 return;
2201 }
2202 }
2203 else
2204 cupsdLogRequest(con, HTTP_OK);
2205 }
2206 }
2207
2208 if (con->request)
2209 {
2210 cupsdProcessIPPRequest(con);
2211
2212 if (con->filename)
2213 {
2214 unlink(con->filename);
2215 cupsdClearString(&con->filename);
2216 }
2217
2218 return;
2219 }
2220 }
2221 break;
2222
2223 default :
2224 break; /* Anti-compiler-warning-code */
2225 }
2226
2227 if (con->http.state == HTTP_WAITING)
2228 {
2229 if (!con->http.keep_alive)
2230 {
2231 cupsdLogMessage(CUPSD_LOG_DEBUG,
2232 "cupsdReadClient: %d Closing because Keep-Alive disabled",
2233 con->http.fd);
2234 cupsdCloseClient(con);
2235 }
2236 else
2237 {
2238 cupsArrayRemove(ActiveClients, con);
2239 cupsdSetBusyState();
2240 }
2241 }
2242 }
2243
2244
2245 /*
2246 * 'cupsdSendCommand()' - Send output from a command via HTTP.
2247 */
2248
2249 int /* O - 1 on success, 0 on failure */
2250 cupsdSendCommand(
2251 cupsd_client_t *con, /* I - Client connection */
2252 char *command, /* I - Command to run */
2253 char *options, /* I - Command-line options */
2254 int root) /* I - Run as root? */
2255 {
2256 int fd; /* Standard input file descriptor */
2257
2258
2259 if (con->filename)
2260 {
2261 fd = open(con->filename, O_RDONLY);
2262
2263 if (fd < 0)
2264 {
2265 cupsdLogMessage(CUPSD_LOG_ERROR,
2266 "cupsdSendCommand: %d Unable to open \"%s\" for reading: %s",
2267 con->http.fd, con->filename ? con->filename : "/dev/null",
2268 strerror(errno));
2269 return (0);
2270 }
2271
2272 fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
2273 }
2274 else
2275 fd = -1;
2276
2277 con->pipe_pid = pipe_command(con, fd, &(con->file), command, options, root);
2278
2279 if (fd >= 0)
2280 close(fd);
2281
2282 cupsdLogMessage(CUPSD_LOG_INFO, "Started \"%s\" (pid=%d)", command,
2283 con->pipe_pid);
2284
2285 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdSendCommand: %d file=%d",
2286 con->http.fd, con->file);
2287
2288 if (con->pipe_pid == 0)
2289 return (0);
2290
2291 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2292
2293 cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con);
2294
2295 con->sent_header = 0;
2296 con->file_ready = 0;
2297 con->got_fields = 0;
2298 con->header_used = 0;
2299
2300 return (1);
2301 }
2302
2303
2304 /*
2305 * 'cupsdSendError()' - Send an error message via HTTP.
2306 */
2307
2308 int /* O - 1 if successful, 0 otherwise */
2309 cupsdSendError(cupsd_client_t *con, /* I - Connection */
2310 http_status_t code, /* I - Error code */
2311 int auth_type)/* I - Authentication type */
2312 {
2313 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2314 "cupsdSendError(con=%p(%d), code=%d, auth_type=%d", con,
2315 con->http.fd, code, auth_type);
2316
2317 #ifdef HAVE_SSL
2318 /*
2319 * Force client to upgrade for authentication if that is how the
2320 * server is configured...
2321 */
2322
2323 if (code == HTTP_UNAUTHORIZED &&
2324 DefaultEncryption == HTTP_ENCRYPT_REQUIRED &&
2325 strcasecmp(con->http.hostname, "localhost") &&
2326 !con->http.tls)
2327 {
2328 code = HTTP_UPGRADE_REQUIRED;
2329 }
2330 #endif /* HAVE_SSL */
2331
2332 /*
2333 * Put the request in the access_log file...
2334 */
2335
2336 cupsdLogRequest(con, code);
2337
2338 /*
2339 * To work around bugs in some proxies, don't use Keep-Alive for some
2340 * error messages...
2341 *
2342 * Kerberos authentication doesn't work without Keep-Alive, so
2343 * never disable it in that case.
2344 */
2345
2346 if (code >= HTTP_BAD_REQUEST && con->http.auth_type != CUPSD_AUTH_NEGOTIATE)
2347 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
2348
2349 /*
2350 * Send an error message back to the client. If the error code is a
2351 * 400 or 500 series, make sure the message contains some text, too!
2352 */
2353
2354 if (!cupsdSendHeader(con, code, NULL, auth_type))
2355 return (0);
2356
2357 #ifdef HAVE_SSL
2358 if (code == HTTP_UPGRADE_REQUIRED)
2359 if (httpPrintf(HTTP(con), "Connection: Upgrade\r\n") < 0)
2360 return (0);
2361
2362 if (httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n") < 0)
2363 return (0);
2364 #endif /* HAVE_SSL */
2365
2366 if (con->http.version >= HTTP_1_1 &&
2367 con->http.keep_alive == HTTP_KEEPALIVE_OFF)
2368 {
2369 if (httpPrintf(HTTP(con), "Connection: close\r\n") < 0)
2370 return (0);
2371 }
2372
2373 if (code >= HTTP_BAD_REQUEST)
2374 {
2375 /*
2376 * Send a human-readable error message.
2377 */
2378
2379 char message[4096], /* Message for user */
2380 urltext[1024], /* URL redirection text */
2381 redirect[1024]; /* Redirection link */
2382 const char *text; /* Status-specific text */
2383
2384
2385 redirect[0] = '\0';
2386
2387 if (code == HTTP_UNAUTHORIZED)
2388 text = _cupsLangString(con->language,
2389 _("Enter your username and password or the "
2390 "root username and password to access this "
2391 "page. If you are using Kerberos authentication, "
2392 "make sure you have a valid Kerberos ticket."));
2393 else if (code == HTTP_UPGRADE_REQUIRED)
2394 {
2395 text = urltext;
2396
2397 snprintf(urltext, sizeof(urltext),
2398 _cupsLangString(con->language,
2399 _("You must access this page using the URL "
2400 "<A HREF=\"https://%s:%d%s\">"
2401 "https://%s:%d%s</A>.")),
2402 con->servername, con->serverport, con->uri,
2403 con->servername, con->serverport, con->uri);
2404
2405 snprintf(redirect, sizeof(redirect),
2406 "<META HTTP-EQUIV=\"Refresh\" "
2407 "CONTENT=\"3;URL=https://%s:%d%s\">\n",
2408 con->servername, con->serverport, con->uri);
2409 }
2410 else
2411 text = "";
2412
2413 snprintf(message, sizeof(message),
2414 "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" "
2415 "\"http://www.w3.org/TR/html4/loose.dtd\">\n"
2416 "<HTML>\n"
2417 "<HEAD>\n"
2418 "\t<META HTTP-EQUIV=\"Content-Type\" "
2419 "CONTENT=\"text/html; charset=utf-8\">\n"
2420 "\t<TITLE>%d %s</TITLE>\n"
2421 "\t<LINK REL=\"STYLESHEET\" TYPE=\"text/css\" "
2422 "HREF=\"/cups.css\">\n"
2423 "%s"
2424 "</HEAD>\n"
2425 "<BODY>\n"
2426 "<H1>%d %s</H1>\n"
2427 "<P>%s</P>\n"
2428 "</BODY>\n"
2429 "</HTML>\n",
2430 code, httpStatus(code), redirect, code, httpStatus(code), text);
2431
2432 if (httpPrintf(HTTP(con), "Content-Type: text/html; charset=utf-8\r\n") < 0)
2433 return (0);
2434 if (httpPrintf(HTTP(con), "Content-Length: %d\r\n",
2435 (int)strlen(message)) < 0)
2436 return (0);
2437 if (httpPrintf(HTTP(con), "\r\n") < 0)
2438 return (0);
2439 if (httpPrintf(HTTP(con), "%s", message) < 0)
2440 return (0);
2441 }
2442 else if (httpPrintf(HTTP(con), "\r\n") < 0)
2443 return (0);
2444
2445 if (cupsdFlushHeader(con) < 0)
2446 return (0);
2447
2448 con->http.state = HTTP_WAITING;
2449
2450 return (1);
2451 }
2452
2453
2454 /*
2455 * 'cupsdSendHeader()' - Send an HTTP request.
2456 */
2457
2458 int /* O - 1 on success, 0 on failure */
2459 cupsdSendHeader(
2460 cupsd_client_t *con, /* I - Client to send to */
2461 http_status_t code, /* I - HTTP status code */
2462 char *type, /* I - MIME type of document */
2463 int auth_type) /* I - Type of authentication */
2464 {
2465 char auth_str[1024]; /* Authorization string */
2466 #ifdef HAVE_GSSAPI
2467 static char *gss_buf = NULL; /* Kerberos auth data buffer */
2468 static int gss_bufsize = 0; /* Size of Kerberos auth data buffer */
2469 #endif /* HAVE_GSSAPI */
2470
2471
2472 /*
2473 * Send the HTTP status header...
2474 */
2475
2476 if (code == HTTP_CONTINUE)
2477 {
2478 /*
2479 * 100-continue doesn't send any headers...
2480 */
2481
2482 return (httpPrintf(HTTP(con), "HTTP/%d.%d 100 Continue\r\n\r\n",
2483 con->http.version / 100, con->http.version % 100) > 0);
2484 }
2485
2486 httpFlushWrite(HTTP(con));
2487
2488 con->http.data_encoding = HTTP_ENCODE_FIELDS;
2489
2490 if (httpPrintf(HTTP(con), "HTTP/%d.%d %d %s\r\n", con->http.version / 100,
2491 con->http.version % 100, code, httpStatus(code)) < 0)
2492 return (0);
2493 if (httpPrintf(HTTP(con), "Date: %s\r\n", httpGetDateString(time(NULL))) < 0)
2494 return (0);
2495 if (ServerHeader)
2496 if (httpPrintf(HTTP(con), "Server: %s\r\n", ServerHeader) < 0)
2497 return (0);
2498 if (con->http.keep_alive && con->http.version >= HTTP_1_0)
2499 {
2500 if (httpPrintf(HTTP(con), "Connection: Keep-Alive\r\n") < 0)
2501 return (0);
2502 if (httpPrintf(HTTP(con), "Keep-Alive: timeout=%d\r\n",
2503 KeepAliveTimeout) < 0)
2504 return (0);
2505 }
2506 if (code == HTTP_METHOD_NOT_ALLOWED)
2507 if (httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST, PUT\r\n") < 0)
2508 return (0);
2509
2510 if (code == HTTP_UNAUTHORIZED)
2511 {
2512 if (auth_type == CUPSD_AUTH_NONE)
2513 {
2514 if (!con->best || con->best->type <= CUPSD_AUTH_NONE)
2515 auth_type = DefaultAuthType;
2516 else
2517 auth_type = con->best->type;
2518 }
2519
2520 auth_str[0] = '\0';
2521
2522 if (auth_type == CUPSD_AUTH_BASIC || auth_type == CUPSD_AUTH_BASICDIGEST)
2523 strlcpy(auth_str, "Basic realm=\"CUPS\"", sizeof(auth_str));
2524 else if (auth_type == CUPSD_AUTH_DIGEST)
2525 snprintf(auth_str, sizeof(auth_str), "Digest realm=\"CUPS\", nonce=\"%s\"",
2526 con->http.hostname);
2527 #ifdef HAVE_GSSAPI
2528 else if (auth_type == CUPSD_AUTH_NEGOTIATE && con->gss_output_token.length == 0)
2529 strlcpy(auth_str, "Negotiate", sizeof(auth_str));
2530 #endif /* HAVE_GSSAPI */
2531
2532 if (con->best && auth_type != CUPSD_AUTH_NEGOTIATE &&
2533 !strcasecmp(con->http.hostname, "localhost"))
2534 {
2535 /*
2536 * Add a "trc" (try root certification) parameter for local non-Kerberos
2537 * requests when the request requires system group membership - then the
2538 * client knows the root certificate can/should be used.
2539 *
2540 * Also, for Mac OS X we also look for @AUTHKEY and add an "authkey"
2541 * parameter as needed...
2542 */
2543
2544 int i; /* Looping var */
2545 char *auth_key; /* Auth key buffer */
2546 size_t auth_size; /* Size of remaining buffer */
2547
2548 auth_key = auth_str + strlen(auth_str);
2549 auth_size = sizeof(auth_str) - (auth_key - auth_str);
2550
2551 for (i = 0; i < con->best->num_names; i ++)
2552 {
2553 #ifdef HAVE_AUTHORIZATION_H
2554 if (!strncasecmp(con->best->names[i], "@AUTHKEY(", 9))
2555 {
2556 snprintf(auth_key, auth_size, ", authkey=\"%s\"",
2557 con->best->names[i] + 9);
2558 /* end parenthesis is stripped in conf.c */
2559 break;
2560 }
2561 else
2562 #endif /* HAVE_AUTHORIZATION_H */
2563 if (!strcasecmp(con->best->names[i], "@SYSTEM"))
2564 {
2565 #ifdef HAVE_AUTHORIZATION_H
2566 if (SystemGroupAuthKey)
2567 snprintf(auth_key, auth_size,
2568 ", authkey=\"%s\", trc=\"y\"",
2569 SystemGroupAuthKey);
2570 else
2571 #else
2572 strlcpy(auth_key, ", trc=\"y\"", auth_size);
2573 #endif /* HAVE_AUTHORIZATION_H */
2574 break;
2575 }
2576 }
2577 }
2578
2579 if (auth_str[0])
2580 {
2581 cupsdLogMessage(CUPSD_LOG_DEBUG,
2582 "cupsdSendHeader: %d WWW-Authenticate: %s", con->http.fd,
2583 auth_str);
2584
2585 if (httpPrintf(HTTP(con), "WWW-Authenticate: %s\r\n", auth_str) < 0)
2586 return (0);
2587 }
2588 }
2589
2590 #ifdef HAVE_GSSAPI
2591 /*
2592 * WWW-Authenticate: Negotiate can be included even for
2593 * non-401 replies...
2594 */
2595
2596 if (con->gss_output_token.length > 0 && con->gss_output_token.length <= 65536)
2597 {
2598 OM_uint32 minor_status; /* Minor status code */
2599 int bufsize; /* Size of output token buffer */
2600
2601
2602 bufsize = con->gss_output_token.length * 4 / 3 + 2;
2603
2604 if (bufsize > gss_bufsize)
2605 {
2606 char *buf; /* New buffer */
2607
2608
2609 bufsize = (bufsize + 1023) & 1023;/* Round up */
2610
2611 if (gss_buf)
2612 buf = realloc(gss_buf, bufsize);
2613 else
2614 buf = malloc(bufsize);
2615
2616 if (!buf)
2617 {
2618 cupsdLogMessage(CUPSD_LOG_ERROR,
2619 "Unable to allocate %d bytes for Kerberos credentials!",
2620 bufsize);
2621 return (0);
2622 }
2623
2624 gss_buf = buf;
2625 gss_bufsize = bufsize;
2626 }
2627
2628 httpEncode64_2(gss_buf, gss_bufsize,
2629 con->gss_output_token.value,
2630 con->gss_output_token.length);
2631 gss_release_buffer(&minor_status, &con->gss_output_token);
2632
2633 cupsdLogMessage(CUPSD_LOG_DEBUG,
2634 "cupsdSendHeader: WWW-Authenticate: Negotiate %s", gss_buf);
2635
2636 if (httpPrintf(HTTP(con), "WWW-Authenticate: Negotiate %s\r\n",
2637 gss_buf) < 0)
2638 return (0);
2639 }
2640 else if (con->gss_output_token.length > 65536)
2641 {
2642 cupsdLogMessage(CUPSD_LOG_ERROR,
2643 "Kerberos credentials larger than 64k (%d)!",
2644 (int)con->gss_output_token.length);
2645 return (0);
2646 }
2647 #endif /* HAVE_GSSAPI */
2648
2649 if (con->language && strcmp(con->language->language, "C"))
2650 {
2651 if (httpPrintf(HTTP(con), "Content-Language: %s\r\n",
2652 con->language->language) < 0)
2653 return (0);
2654 }
2655
2656 if (type)
2657 {
2658 if (!strcmp(type, "text/html"))
2659 {
2660 if (httpPrintf(HTTP(con),
2661 "Content-Type: text/html; charset=utf-8\r\n") < 0)
2662 return (0);
2663 }
2664 else if (httpPrintf(HTTP(con), "Content-Type: %s\r\n", type) < 0)
2665 return (0);
2666 }
2667
2668 return (1);
2669 }
2670
2671
2672 /*
2673 * 'cupsdUpdateCGI()' - Read status messages from CGI scripts and programs.
2674 */
2675
2676 void
2677 cupsdUpdateCGI(void)
2678 {
2679 char *ptr, /* Pointer to end of line in buffer */
2680 message[1024]; /* Pointer to message text */
2681 int loglevel; /* Log level for message */
2682
2683
2684 while ((ptr = cupsdStatBufUpdate(CGIStatusBuffer, &loglevel,
2685 message, sizeof(message))) != NULL)
2686 {
2687 if (loglevel == CUPSD_LOG_INFO)
2688 cupsdLogMessage(CUPSD_LOG_INFO, "%s", message);
2689
2690 if (!strchr(CGIStatusBuffer->buffer, '\n'))
2691 break;
2692 }
2693
2694 if (ptr == NULL && !CGIStatusBuffer->bufused)
2695 {
2696 /*
2697 * Fatal error on pipe - should never happen!
2698 */
2699
2700 cupsdLogMessage(CUPSD_LOG_CRIT,
2701 "cupsdUpdateCGI: error reading from CGI error pipe - %s",
2702 strerror(errno));
2703 }
2704 }
2705
2706
2707 /*
2708 * 'cupsdWriteClient()' - Write data to a client as needed.
2709 */
2710
2711 void
2712 cupsdWriteClient(cupsd_client_t *con) /* I - Client connection */
2713 {
2714 int bytes, /* Number of bytes written */
2715 field_col; /* Current column */
2716 char *bufptr, /* Pointer into buffer */
2717 *bufend; /* Pointer to end of buffer */
2718 ipp_state_t ipp_state; /* IPP state value */
2719
2720
2721 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2722 "cupsdWriteClient(con=%p(%d)) response=%p(%d), file=%d "
2723 "pipe_pid=%d state=%d",
2724 con, con->http.fd, con->response,
2725 con->response ? con->response->state : -1,
2726 con->file, con->pipe_pid, con->http.state);
2727
2728 if (con->http.state != HTTP_GET_SEND &&
2729 con->http.state != HTTP_POST_SEND)
2730 {
2731 /*
2732 * If we get called in the wrong state, then something went wrong with the
2733 * connection and we need to shut it down...
2734 */
2735
2736 cupsdLogMessage(CUPSD_LOG_DEBUG,
2737 "cupsdWriteClient: %d Closing on unknown HTTP state %d",
2738 con->http.fd, con->http.state);
2739 cupsdCloseClient(con);
2740 return;
2741 }
2742
2743 if (con->pipe_pid)
2744 {
2745 /*
2746 * Make sure we select on the CGI output...
2747 */
2748
2749 cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con);
2750
2751 if (!con->file_ready)
2752 {
2753 /*
2754 * Try again later when there is CGI output available...
2755 */
2756
2757 cupsdRemoveSelect(con->http.fd);
2758 return;
2759 }
2760
2761 con->file_ready = 0;
2762 }
2763
2764 if (con->response && con->response->state != IPP_DATA)
2765 {
2766 ipp_state = ippWrite(HTTP(con), con->response);
2767 bytes = ipp_state != IPP_ERROR &&
2768 (con->file >= 0 || ipp_state != IPP_DATA);
2769 }
2770 else if ((bytes = read(con->file, con->header,
2771 sizeof(con->header) - con->header_used)) > 0)
2772 {
2773 con->header_used += bytes;
2774
2775 if (con->pipe_pid && !con->got_fields)
2776 {
2777 /*
2778 * Inspect the data for Content-Type and other fields.
2779 */
2780
2781 for (bufptr = con->header, bufend = con->header + con->header_used,
2782 field_col = 0;
2783 !con->got_fields && bufptr < bufend;
2784 bufptr ++)
2785 {
2786 if (*bufptr == '\n')
2787 {
2788 /*
2789 * Send line to client...
2790 */
2791
2792 if (bufptr > con->header && bufptr[-1] == '\r')
2793 bufptr[-1] = '\0';
2794 *bufptr++ = '\0';
2795
2796 cupsdLogMessage(CUPSD_LOG_DEBUG, "Script header: %s", con->header);
2797
2798 if (!con->sent_header)
2799 {
2800 /*
2801 * Handle redirection and CGI status codes...
2802 */
2803
2804 if (!strncasecmp(con->header, "Location:", 9))
2805 {
2806 cupsdSendHeader(con, HTTP_SEE_OTHER, NULL, CUPSD_AUTH_NONE);
2807 con->sent_header = 2;
2808
2809 if (httpPrintf(HTTP(con), "Content-Length: 0\r\n") < 0)
2810 return;
2811 }
2812 else if (!strncasecmp(con->header, "Status:", 7))
2813 {
2814 cupsdSendError(con, (http_status_t)atoi(con->header + 7),
2815 CUPSD_AUTH_NONE);
2816 con->sent_header = 2;
2817 }
2818 else
2819 {
2820 cupsdSendHeader(con, HTTP_OK, NULL, CUPSD_AUTH_NONE);
2821 con->sent_header = 1;
2822
2823 if (con->http.version == HTTP_1_1)
2824 {
2825 if (httpPrintf(HTTP(con), "Transfer-Encoding: chunked\r\n") < 0)
2826 return;
2827 }
2828 }
2829 }
2830
2831 if (strncasecmp(con->header, "Status:", 7))
2832 httpPrintf(HTTP(con), "%s\r\n", con->header);
2833
2834 /*
2835 * Update buffer...
2836 */
2837
2838 con->header_used -= bufptr - con->header;
2839
2840 if (con->header_used > 0)
2841 memmove(con->header, bufptr, con->header_used);
2842
2843 bufptr = con->header - 1;
2844
2845 /*
2846 * See if the line was empty...
2847 */
2848
2849 if (field_col == 0)
2850 {
2851 con->got_fields = 1;
2852
2853 if (cupsdFlushHeader(con) < 0)
2854 {
2855 cupsdCloseClient(con);
2856 return;
2857 }
2858
2859 if (con->http.version == HTTP_1_1)
2860 con->http.data_encoding = HTTP_ENCODE_CHUNKED;
2861 }
2862 else
2863 field_col = 0;
2864 }
2865 else if (*bufptr != '\r')
2866 field_col ++;
2867 }
2868
2869 if (!con->got_fields)
2870 {
2871 con->http.activity = time(NULL);
2872 return;
2873 }
2874 }
2875
2876 if (con->header_used > 0)
2877 {
2878 if (httpWrite2(HTTP(con), con->header, con->header_used) < 0)
2879 {
2880 cupsdLogMessage(CUPSD_LOG_DEBUG,
2881 "cupsdWriteClient: %d Closing for error %d (%s)",
2882 con->http.fd, con->http.error,
2883 strerror(con->http.error));
2884 cupsdCloseClient(con);
2885 return;
2886 }
2887
2888 if (con->http.data_encoding == HTTP_ENCODE_CHUNKED)
2889 httpFlushWrite(HTTP(con));
2890
2891 con->bytes += con->header_used;
2892
2893 if (con->http.state == HTTP_WAITING)
2894 bytes = 0;
2895 else
2896 bytes = con->header_used;
2897
2898 con->header_used = 0;
2899 }
2900 }
2901
2902 if (bytes <= 0 ||
2903 (con->http.state != HTTP_GET_SEND && con->http.state != HTTP_POST_SEND))
2904 {
2905 if (!con->sent_header && con->pipe_pid)
2906 cupsdSendError(con, HTTP_SERVER_ERROR, CUPSD_AUTH_NONE);
2907 else
2908 {
2909 cupsdLogRequest(con, HTTP_OK);
2910
2911 httpFlushWrite(HTTP(con));
2912
2913 if (con->http.data_encoding == HTTP_ENCODE_CHUNKED && con->sent_header == 1)
2914 {
2915 if (httpWrite2(HTTP(con), "", 0) < 0)
2916 {
2917 cupsdLogMessage(CUPSD_LOG_DEBUG,
2918 "cupsdWriteClient: %d Closing for error %d (%s)",
2919 con->http.fd, con->http.error,
2920 strerror(con->http.error));
2921 cupsdCloseClient(con);
2922 return;
2923 }
2924 }
2925 }
2926
2927 con->http.state = HTTP_WAITING;
2928
2929 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
2930
2931 if (con->file >= 0)
2932 {
2933 cupsdRemoveSelect(con->file);
2934
2935 if (con->pipe_pid)
2936 cupsdEndProcess(con->pipe_pid, 0);
2937
2938 close(con->file);
2939 con->file = -1;
2940 con->pipe_pid = 0;
2941 }
2942
2943 if (con->filename)
2944 {
2945 unlink(con->filename);
2946 cupsdClearString(&con->filename);
2947 }
2948
2949 if (con->request)
2950 {
2951 ippDelete(con->request);
2952 con->request = NULL;
2953 }
2954
2955 if (con->response)
2956 {
2957 ippDelete(con->response);
2958 con->response = NULL;
2959 }
2960
2961 cupsdClearString(&con->command);
2962 cupsdClearString(&con->options);
2963 cupsdClearString(&con->query_string);
2964
2965 if (!con->http.keep_alive)
2966 {
2967 cupsdLogMessage(CUPSD_LOG_DEBUG,
2968 "cupsdWriteClient: %d Closing because Keep-Alive disabled",
2969 con->http.fd);
2970 cupsdCloseClient(con);
2971 return;
2972 }
2973 else
2974 {
2975 cupsArrayRemove(ActiveClients, con);
2976 cupsdSetBusyState();
2977 }
2978 }
2979
2980 con->http.activity = time(NULL);
2981 }
2982
2983
2984 /*
2985 * 'check_if_modified()' - Decode an "If-Modified-Since" line.
2986 */
2987
2988 static int /* O - 1 if modified since */
2989 check_if_modified(
2990 cupsd_client_t *con, /* I - Client connection */
2991 struct stat *filestats) /* I - File information */
2992 {
2993 char *ptr; /* Pointer into field */
2994 time_t date; /* Time/date value */
2995 off_t size; /* Size/length value */
2996
2997
2998 size = 0;
2999 date = 0;
3000 ptr = con->http.fields[HTTP_FIELD_IF_MODIFIED_SINCE];
3001
3002 if (*ptr == '\0')
3003 return (1);
3004
3005 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3006 "check_if_modified(con=%p(%d), "
3007 "filestats=%p(" CUPS_LLFMT ", %d)) If-Modified-Since=\"%s\"",
3008 con, con->http.fd, filestats, CUPS_LLCAST filestats->st_size,
3009 (int)filestats->st_mtime, ptr);
3010
3011 while (*ptr != '\0')
3012 {
3013 while (isspace(*ptr) || *ptr == ';')
3014 ptr ++;
3015
3016 if (strncasecmp(ptr, "length=", 7) == 0)
3017 {
3018 ptr += 7;
3019 size = strtoll(ptr, NULL, 10);
3020
3021 while (isdigit(*ptr))
3022 ptr ++;
3023 }
3024 else if (isalpha(*ptr))
3025 {
3026 date = httpGetDateTime(ptr);
3027 while (*ptr != '\0' && *ptr != ';')
3028 ptr ++;
3029 }
3030 else
3031 ptr ++;
3032 }
3033
3034 return ((size != filestats->st_size && size != 0) ||
3035 (date < filestats->st_mtime && date != 0) ||
3036 (size == 0 && date == 0));
3037 }
3038
3039
3040 /*
3041 * 'compare_clients()' - Compare two client connections.
3042 */
3043
3044 static int /* O - Result of comparison */
3045 compare_clients(cupsd_client_t *a, /* I - First client */
3046 cupsd_client_t *b, /* I - Second client */
3047 void *data) /* I - User data (not used) */
3048 {
3049 (void)data;
3050
3051 if (a == b)
3052 return (0);
3053 else if (a < b)
3054 return (-1);
3055 else
3056 return (1);
3057 }
3058
3059
3060 /*
3061 * 'data_ready()' - Check whether data is available from a client.
3062 */
3063
3064 static int /* O - 1 if data is ready, 0 otherwise */
3065 data_ready(cupsd_client_t *con) /* I - Client */
3066 {
3067 if (con->http.used > 0)
3068 return (1);
3069 #ifdef HAVE_SSL
3070 else if (con->http.tls)
3071 {
3072 # ifdef HAVE_LIBSSL
3073 if (SSL_pending((SSL *)(con->http.tls)))
3074 return (1);
3075 # elif defined(HAVE_GNUTLS)
3076 if (gnutls_record_check_pending(((http_tls_t *)(con->http.tls))->session))
3077 return (1);
3078 # elif defined(HAVE_CDSASSL)
3079 size_t bytes; /* Bytes that are available */
3080
3081 if (!SSLGetBufferedReadSize(((http_tls_t *)(con->http.tls))->session,
3082 &bytes) && bytes > 0)
3083 return (1);
3084 # endif /* HAVE_LIBSSL */
3085 }
3086 #endif /* HAVE_SSL */
3087
3088 return (0);
3089 }
3090
3091
3092 #ifdef HAVE_SSL
3093 /*
3094 * 'encrypt_client()' - Enable encryption for the client...
3095 */
3096
3097 static int /* O - 1 on success, 0 on error */
3098 encrypt_client(cupsd_client_t *con) /* I - Client to encrypt */
3099 {
3100 # ifdef HAVE_LIBSSL
3101 SSL_CTX *context; /* Context for encryption */
3102 SSL *conn; /* Connection for encryption */
3103 BIO *bio; /* BIO data */
3104 unsigned long error; /* Error code */
3105
3106
3107 cupsdLogMessage(CUPSD_LOG_DEBUG2, "encrypt_client(con=%p(%d))", con,
3108 con->http.fd);
3109
3110 /*
3111 * Verify that we have a certificate...
3112 */
3113
3114 if (access(ServerKey, 0) || access(ServerCertificate, 0))
3115 {
3116 /*
3117 * Nope, make a self-signed certificate...
3118 */
3119
3120 if (!make_certificate(con))
3121 return (0);
3122 }
3123
3124 /*
3125 * Create the SSL context and accept the connection...
3126 */
3127
3128 context = SSL_CTX_new(SSLv23_server_method());
3129
3130 SSL_CTX_set_options(context, SSL_OP_NO_SSLv2); /* Only use SSLv3 or TLS */
3131 if (SSLOptions & CUPSD_SSL_NOEMPTY)
3132 SSL_CTX_set_options(context, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
3133 SSL_CTX_use_PrivateKey_file(context, ServerKey, SSL_FILETYPE_PEM);
3134 SSL_CTX_use_certificate_chain_file(context, ServerCertificate);
3135
3136 bio = BIO_new(_httpBIOMethods());
3137 BIO_ctrl(bio, BIO_C_SET_FILE_PTR, 0, (char *)HTTP(con));
3138
3139 conn = SSL_new(context);
3140 SSL_set_bio(conn, bio, bio);
3141
3142 if (SSL_accept(conn) != 1)
3143 {
3144 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to encrypt connection from %s!",
3145 con->http.hostname);
3146
3147 while ((error = ERR_get_error()) != 0)
3148 cupsdLogMessage(CUPSD_LOG_ERROR, "%s", ERR_error_string(error, NULL));
3149
3150 SSL_CTX_free(context);
3151 SSL_free(conn);
3152 return (0);
3153 }
3154
3155 cupsdLogMessage(CUPSD_LOG_DEBUG, "Connection from %s now encrypted.",
3156 con->http.hostname);
3157
3158 con->http.tls = conn;
3159 return (1);
3160
3161 # elif defined(HAVE_GNUTLS)
3162 http_tls_t *conn; /* TLS session object */
3163 int error; /* Error code */
3164 gnutls_certificate_server_credentials *credentials;
3165 /* TLS credentials */
3166
3167
3168 cupsdLogMessage(CUPSD_LOG_DEBUG2, "encrypt_client(con=%p(%d))", con,
3169 con->http.fd);
3170
3171 /*
3172 * Verify that we have a certificate...
3173 */
3174
3175 if (access(ServerKey, 0) || access(ServerCertificate, 0))
3176 {
3177 /*
3178 * Nope, make a self-signed certificate...
3179 */
3180
3181 if (!make_certificate(con))
3182 return (0);
3183 }
3184
3185 /*
3186 * Create the SSL object and perform the SSL handshake...
3187 */
3188
3189 conn = (http_tls_t *)malloc(sizeof(http_tls_t));
3190
3191 if (conn == NULL)
3192 return (0);
3193
3194 credentials = (gnutls_certificate_server_credentials *)
3195 malloc(sizeof(gnutls_certificate_server_credentials));
3196 if (credentials == NULL)
3197 {
3198 cupsdLogMessage(CUPSD_LOG_ERROR,
3199 "Unable to encrypt connection from %s - %s",
3200 con->http.hostname, strerror(errno));
3201
3202 free(conn);
3203 return (0);
3204 }
3205
3206 gnutls_certificate_allocate_credentials(credentials);
3207 gnutls_certificate_set_x509_key_file(*credentials, ServerCertificate,
3208 ServerKey, GNUTLS_X509_FMT_PEM);
3209
3210 gnutls_init(&(conn->session), GNUTLS_SERVER);
3211 gnutls_set_default_priority(conn->session);
3212 gnutls_credentials_set(conn->session, GNUTLS_CRD_CERTIFICATE, *credentials);
3213 gnutls_transport_set_ptr(conn->session, (gnutls_transport_ptr)HTTP(con));
3214 gnutls_transport_set_pull_function(conn->session, _httpReadGNUTLS);
3215 gnutls_transport_set_push_function(conn->session, _httpWriteGNUTLS);
3216
3217 error = gnutls_handshake(conn->session);
3218
3219 if (error != GNUTLS_E_SUCCESS)
3220 {
3221 cupsdLogMessage(CUPSD_LOG_ERROR,
3222 "Unable to encrypt connection from %s - %s",
3223 con->http.hostname, gnutls_strerror(error));
3224
3225 gnutls_deinit(conn->session);
3226 gnutls_certificate_free_credentials(*credentials);
3227 free(conn);
3228 free(credentials);
3229 return (0);
3230 }
3231
3232 cupsdLogMessage(CUPSD_LOG_DEBUG, "Connection from %s now encrypted.",
3233 con->http.hostname);
3234
3235 conn->credentials = credentials;
3236 con->http.tls = conn;
3237 return (1);
3238
3239 # elif defined(HAVE_CDSASSL)
3240 OSStatus error; /* Error code */
3241 http_tls_t *conn; /* CDSA connection information */
3242
3243
3244 cupsdLogMessage(CUPSD_LOG_DEBUG2, "encrypt_client(con=%p(%d))", con,
3245 con->http.fd);
3246
3247 if ((conn = (http_tls_t *)malloc(sizeof(http_tls_t))) == NULL)
3248 return (0);
3249
3250 error = 0;
3251 conn->session = NULL;
3252 conn->certsArray = get_cdsa_certificate(con);
3253
3254 if (!conn->certsArray)
3255 {
3256 /*
3257 * No keychain (yet), make a self-signed certificate...
3258 */
3259
3260 if (make_certificate(con))
3261 conn->certsArray = get_cdsa_certificate(con);
3262 }
3263
3264 if (!conn->certsArray)
3265 {
3266 cupsdLogMessage(CUPSD_LOG_ERROR,
3267 "Could not find signing key in keychain \"%s\"",
3268 ServerCertificate);
3269 error = errSSLBadCert; /* errSSLBadConfiguration is a better choice, but not available on 10.2.x */
3270 }
3271
3272 if (!error)
3273 error = SSLNewContext(true, &conn->session);
3274
3275 if (!error)
3276 error = SSLSetIOFuncs(conn->session, _httpReadCDSA, _httpWriteCDSA);
3277
3278 if (!error)
3279 error = SSLSetProtocolVersionEnabled(conn->session, kSSLProtocol2, false);
3280
3281 if (!error)
3282 error = SSLSetConnection(conn->session, HTTP(con));
3283
3284 if (!error)
3285 error = SSLSetAllowsExpiredCerts(conn->session, true);
3286
3287 if (!error)
3288 error = SSLSetAllowsAnyRoot(conn->session, true);
3289
3290 if (!error)
3291 error = SSLSetCertificate(conn->session, conn->certsArray);
3292
3293 if (!error)
3294 {
3295 /*
3296 * Perform SSL/TLS handshake
3297 */
3298
3299 while ((error = SSLHandshake(conn->session)) == errSSLWouldBlock)
3300 usleep(1000);
3301 }
3302
3303 if (error)
3304 {
3305 cupsdLogMessage(CUPSD_LOG_ERROR,
3306 "Unable to encrypt connection from %s - %s (%d)",
3307 con->http.hostname, cssmErrorString(error), (int)error);
3308
3309 con->http.error = error;
3310 con->http.status = HTTP_ERROR;
3311
3312 if (conn->session)
3313 SSLDisposeContext(conn->session);
3314
3315 if (conn->certsArray)
3316 CFRelease(conn->certsArray);
3317
3318 free(conn);
3319
3320 return (0);
3321 }
3322
3323 cupsdLogMessage(CUPSD_LOG_DEBUG, "Connection from %s now encrypted.",
3324 con->http.hostname);
3325
3326 con->http.tls = conn;
3327 return (1);
3328
3329 # endif /* HAVE_LIBSSL */
3330 }
3331 #endif /* HAVE_SSL */
3332
3333
3334 #ifdef HAVE_CDSASSL
3335 /*
3336 * 'get_cdsa_certificate()' - Get a SSL/TLS certificate from the System keychain.
3337 */
3338
3339 static CFArrayRef /* O - Array of certificates */
3340 get_cdsa_certificate(cupsd_client_t *con) /* I - Client connection */
3341 {
3342 OSStatus err; /* Error info */
3343 SecKeychainRef keychain; /* Keychain reference */
3344 SecIdentitySearchRef search; /* Search reference */
3345 SecIdentityRef identity; /* Identity */
3346 CFArrayRef certificates = NULL;
3347 /* Certificate array */
3348
3349
3350 if ((err = SecKeychainOpen(ServerCertificate, &keychain)))
3351 {
3352 cupsdLogMessage(CUPSD_LOG_ERROR, "Cannot open keychain \"%s\" - %s (%d)",
3353 ServerCertificate, cssmErrorString(err), (int)err);
3354 return (NULL);
3355 }
3356
3357 # if HAVE_SECIDENTITYSEARCHCREATEWITHPOLICY
3358 /*
3359 * Use a policy to search for valid certificates who's common name matches the
3360 * servername...
3361 */
3362
3363 SecPolicySearchRef policy_search; /* Policy search ref */
3364 SecPolicyRef policy; /* Policy ref */
3365 CSSM_DATA options; /* Policy options */
3366 CSSM_APPLE_TP_SSL_OPTIONS
3367 ssl_options; /* SSL Option for hostname */
3368
3369
3370 if (SecPolicySearchCreate(CSSM_CERT_X_509v3, &CSSMOID_APPLE_TP_SSL,
3371 NULL, &policy_search))
3372 {
3373 cupsdLogMessage(CUPSD_LOG_ERROR, "Cannot create a policy search reference");
3374 CFRelease(keychain);
3375 return (NULL);
3376 }
3377
3378 if (SecPolicySearchCopyNext(policy_search, &policy))
3379 {
3380 cupsdLogMessage(CUPSD_LOG_ERROR,
3381 "Cannot find a policy to use for searching");
3382 CFRelease(keychain);
3383 CFRelease(policy_search);
3384 return (NULL);
3385 }
3386
3387 memset(&ssl_options, 0, sizeof(ssl_options));
3388 ssl_options.Version = CSSM_APPLE_TP_SSL_OPTS_VERSION;
3389 ssl_options.ServerName = con->servername;
3390 ssl_options.ServerNameLen = strlen(con->servername);
3391
3392 cupsdLogMessage(CUPSD_LOG_DEBUG,
3393 "get_cdsa_certificate: Looking for certs for \"%s\"...",
3394 con->servername);
3395
3396 options.Data = (uint8 *)&ssl_options;
3397 options.Length = sizeof(ssl_options);
3398
3399 if (SecPolicySetValue(policy, &options))
3400 {
3401 cupsdLogMessage(CUPSD_LOG_ERROR,
3402 "Cannot set policy value to use for searching");
3403 CFRelease(keychain);
3404 CFRelease(policy_search);
3405 return (NULL);
3406 }
3407
3408 err = SecIdentitySearchCreateWithPolicy(policy, NULL, CSSM_KEYUSE_SIGN,
3409 keychain, FALSE, &search);
3410 # else
3411 /*
3412 * Assume there is exactly one SecIdentity in the keychain...
3413 */
3414
3415 err = SecIdentitySearchCreate(keychain, CSSM_KEYUSE_SIGN, &search);
3416 # endif /* HAVE_SECIDENTITYSEARCHCREATEWITHPOLICY */
3417
3418 if (err)
3419 cupsdLogMessage(CUPSD_LOG_DEBUG,
3420 "Cannot create keychain search reference: %s (%d)",
3421 cssmErrorString(err), (int)err);
3422 else
3423 {
3424 if ((err = SecIdentitySearchCopyNext(search, &identity)))
3425 {
3426 cupsdLogMessage(CUPSD_LOG_DEBUG,
3427 "Cannot find signing key in keychain \"%s\": %s (%d)",
3428 ServerCertificate, cssmErrorString(err), (int)err);
3429 }
3430 else
3431 {
3432 if (CFGetTypeID(identity) != SecIdentityGetTypeID())
3433 cupsdLogMessage(CUPSD_LOG_ERROR,
3434 "SecIdentitySearchCopyNext CFTypeID failure!");
3435 else
3436 {
3437 if ((certificates = CFArrayCreate(NULL, (const void **)&identity,
3438 1, &kCFTypeArrayCallBacks)) == NULL)
3439 cupsdLogMessage(CUPSD_LOG_ERROR, "Cannot create certificate array");
3440 }
3441
3442 CFRelease(identity);
3443 }
3444
3445 CFRelease(search);
3446 }
3447
3448 # if HAVE_SECIDENTITYSEARCHCREATEWITHPOLICY
3449 CFRelease(policy);
3450 CFRelease(policy_search);
3451 # endif /* HAVE_SECIDENTITYSEARCHCREATEWITHPOLICY */
3452
3453 return (certificates);
3454 }
3455 #endif /* HAVE_CDSASSL */
3456
3457
3458 /*
3459 * 'get_file()' - Get a filename and state info.
3460 */
3461
3462 static char * /* O - Real filename */
3463 get_file(cupsd_client_t *con, /* I - Client connection */
3464 struct stat *filestats, /* O - File information */
3465 char *filename, /* IO - Filename buffer */
3466 int len) /* I - Buffer length */
3467 {
3468 int status; /* Status of filesystem calls */
3469 char *ptr; /* Pointer info filename */
3470 int plen; /* Remaining length after pointer */
3471 char language[7]; /* Language subdirectory, if any */
3472
3473
3474 /*
3475 * Figure out the real filename...
3476 */
3477
3478 language[0] = '\0';
3479
3480 if (!strncmp(con->uri, "/ppd/", 5))
3481 snprintf(filename, len, "%s%s", ServerRoot, con->uri);
3482 else if (!strncmp(con->uri, "/rss/", 5) && !strchr(con->uri + 5, '/'))
3483 snprintf(filename, len, "%s/rss/%s", CacheDir, con->uri + 5);
3484 else if (!strncmp(con->uri, "/admin/conf/", 12))
3485 snprintf(filename, len, "%s%s", ServerRoot, con->uri + 11);
3486 else if (!strncmp(con->uri, "/admin/log/", 11))
3487 {
3488 if (!strncmp(con->uri + 11, "access_log", 10) && AccessLog[0] == '/')
3489 strlcpy(filename, AccessLog, len);
3490 else if (!strncmp(con->uri + 11, "error_log", 9) && ErrorLog[0] == '/')
3491 strlcpy(filename, ErrorLog, len);
3492 else if (!strncmp(con->uri + 11, "page_log", 8) && PageLog[0] == '/')
3493 strlcpy(filename, PageLog, len);
3494 else
3495 return (NULL);
3496 }
3497 else if (con->language)
3498 {
3499 snprintf(language, sizeof(language), "/%s", con->language->language);
3500 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3501 }
3502 else
3503 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3504
3505 if ((ptr = strchr(filename, '?')) != NULL)
3506 *ptr = '\0';
3507
3508 /*
3509 * Grab the status for this language; if there isn't a language-specific file
3510 * then fallback to the default one...
3511 */
3512
3513 if ((status = stat(filename, filestats)) != 0 && language[0] &&
3514 strncmp(con->uri, "/ppd/", 5) &&
3515 strncmp(con->uri, "/admin/conf/", 12) &&
3516 strncmp(con->uri, "/admin/log/", 11))
3517 {
3518 /*
3519 * Drop the country code...
3520 */
3521
3522 language[3] = '\0';
3523 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3524
3525 if ((ptr = strchr(filename, '?')) != NULL)
3526 *ptr = '\0';
3527
3528 if ((status = stat(filename, filestats)) != 0)
3529 {
3530 /*
3531 * Drop the language prefix and try the root directory...
3532 */
3533
3534 language[0] = '\0';
3535 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3536
3537 if ((ptr = strchr(filename, '?')) != NULL)
3538 *ptr = '\0';
3539
3540 status = stat(filename, filestats);
3541 }
3542 }
3543
3544 /*
3545 * If we're found a directory, get the index.html file instead...
3546 */
3547
3548 if (!status && S_ISDIR(filestats->st_mode))
3549 {
3550 /*
3551 * Make sure the URI ends with a slash...
3552 */
3553
3554 if (con->uri[strlen(con->uri) - 1] != '/')
3555 strlcat(con->uri, "/", sizeof(con->uri));
3556
3557 /*
3558 * Find the directory index file, trying every language...
3559 */
3560
3561 do
3562 {
3563 if (status && language[0])
3564 {
3565 /*
3566 * Try a different language subset...
3567 */
3568
3569 if (language[3])
3570 language[0] = '\0'; /* Strip country code */
3571 else
3572 language[0] = '\0'; /* Strip language */
3573 }
3574
3575 /*
3576 * Look for the index file...
3577 */
3578
3579 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3580
3581 if ((ptr = strchr(filename, '?')) != NULL)
3582 *ptr = '\0';
3583
3584 ptr = filename + strlen(filename);
3585 plen = len - (ptr - filename);
3586
3587 strlcpy(ptr, "index.html", plen);
3588 status = stat(filename, filestats);
3589
3590 #ifdef HAVE_JAVA
3591 if (status)
3592 {
3593 strlcpy(ptr, "index.class", plen);
3594 status = stat(filename, filestats);
3595 }
3596 #endif /* HAVE_JAVA */
3597
3598 #ifdef HAVE_PERL
3599 if (status)
3600 {
3601 strlcpy(ptr, "index.pl", plen);
3602 status = stat(filename, filestats);
3603 }
3604 #endif /* HAVE_PERL */
3605
3606 #ifdef HAVE_PHP
3607 if (status)
3608 {
3609 strlcpy(ptr, "index.php", plen);
3610 status = stat(filename, filestats);
3611 }
3612 #endif /* HAVE_PHP */
3613
3614 #ifdef HAVE_PYTHON
3615 if (status)
3616 {
3617 strlcpy(ptr, "index.pyc", plen);
3618 status = stat(filename, filestats);
3619 }
3620
3621 if (status)
3622 {
3623 strlcpy(ptr, "index.py", plen);
3624 status = stat(filename, filestats);
3625 }
3626 #endif /* HAVE_PYTHON */
3627
3628 }
3629 while (status && language[0]);
3630 }
3631
3632 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3633 "get_file(con=%p(%d), filestats=%p, filename=%p, len=%d) = "
3634 "%s", con, con->http.fd, filestats, filename, len,
3635 status ? "(null)" : filename);
3636
3637 if (!status)
3638 con->http.data_remaining = (int)filestats->st_size;
3639
3640 if (status)
3641 return (NULL);
3642 else
3643 return (filename);
3644 }
3645
3646
3647 /*
3648 * 'install_conf_file()' - Install a configuration file.
3649 */
3650
3651 static http_status_t /* O - Status */
3652 install_conf_file(cupsd_client_t *con) /* I - Connection */
3653 {
3654 cups_file_t *in, /* Input file */
3655 *out; /* Output file */
3656 char buffer[1024]; /* Copy buffer */
3657 int bytes; /* Number of bytes */
3658 char conffile[1024], /* Configuration filename */
3659 newfile[1024], /* New config filename */
3660 oldfile[1024]; /* Old config filename */
3661 struct stat confinfo; /* Config file info */
3662
3663
3664 /*
3665 * First construct the filenames...
3666 */
3667
3668 snprintf(conffile, sizeof(conffile), "%s%s", ServerRoot, con->uri + 11);
3669 snprintf(newfile, sizeof(newfile), "%s%s.N", ServerRoot, con->uri + 11);
3670 snprintf(oldfile, sizeof(oldfile), "%s%s.O", ServerRoot, con->uri + 11);
3671
3672 cupsdLogMessage(CUPSD_LOG_INFO, "Installing config file \"%s\"...", conffile);
3673
3674 /*
3675 * Get the owner, group, and permissions of the configuration file.
3676 * If it doesn't exist, assign it to the User and Group in the
3677 * cupsd.conf file with mode 0640 permissions.
3678 */
3679
3680 if (stat(conffile, &confinfo))
3681 {
3682 confinfo.st_uid = User;
3683 confinfo.st_gid = Group;
3684 confinfo.st_mode = ConfigFilePerm;
3685 }
3686
3687 /*
3688 * Open the request file and new config file...
3689 */
3690
3691 if ((in = cupsFileOpen(con->filename, "rb")) == NULL)
3692 {
3693 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open request file \"%s\" - %s",
3694 con->filename, strerror(errno));
3695 return (HTTP_SERVER_ERROR);
3696 }
3697
3698 if ((out = cupsFileOpen(newfile, "wb")) == NULL)
3699 {
3700 cupsFileClose(in);
3701 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open config file \"%s\" - %s",
3702 newfile, strerror(errno));
3703 return (HTTP_SERVER_ERROR);
3704 }
3705
3706 fchmod(cupsFileNumber(out), confinfo.st_mode);
3707 fchown(cupsFileNumber(out), confinfo.st_uid, confinfo.st_gid);
3708
3709 /*
3710 * Copy from the request to the new config file...
3711 */
3712
3713 while ((bytes = cupsFileRead(in, buffer, sizeof(buffer))) > 0)
3714 if (cupsFileWrite(out, buffer, bytes) < bytes)
3715 {
3716 cupsdLogMessage(CUPSD_LOG_ERROR,
3717 "Unable to copy to config file \"%s\" - %s",
3718 newfile, strerror(errno));
3719
3720 cupsFileClose(in);
3721 cupsFileClose(out);
3722 unlink(newfile);
3723
3724 return (HTTP_SERVER_ERROR);
3725 }
3726
3727 /*
3728 * Close the files...
3729 */
3730
3731 cupsFileClose(in);
3732 if (cupsFileClose(out))
3733 {
3734 cupsdLogMessage(CUPSD_LOG_ERROR,
3735 "Error file closing config file \"%s\" - %s",
3736 newfile, strerror(errno));
3737
3738 unlink(newfile);
3739
3740 return (HTTP_SERVER_ERROR);
3741 }
3742
3743 /*
3744 * Remove the request file...
3745 */
3746
3747 unlink(con->filename);
3748 cupsdClearString(&con->filename);
3749
3750 /*
3751 * Unlink the old backup, rename the current config file to the backup
3752 * filename, and rename the new config file to the config file name...
3753 */
3754
3755 if (unlink(oldfile))
3756 if (errno != ENOENT)
3757 {
3758 cupsdLogMessage(CUPSD_LOG_ERROR,
3759 "Unable to remove backup config file \"%s\" - %s",
3760 oldfile, strerror(errno));
3761
3762 unlink(newfile);
3763
3764 return (HTTP_SERVER_ERROR);
3765 }
3766
3767 if (rename(conffile, oldfile))
3768 if (errno != ENOENT)
3769 {
3770 cupsdLogMessage(CUPSD_LOG_ERROR,
3771 "Unable to rename old config file \"%s\" - %s",
3772 conffile, strerror(errno));
3773
3774 unlink(newfile);
3775
3776 return (HTTP_SERVER_ERROR);
3777 }
3778
3779 if (rename(newfile, conffile))
3780 {
3781 cupsdLogMessage(CUPSD_LOG_ERROR,
3782 "Unable to rename new config file \"%s\" - %s",
3783 newfile, strerror(errno));
3784
3785 rename(oldfile, conffile);
3786 unlink(newfile);
3787
3788 return (HTTP_SERVER_ERROR);
3789 }
3790
3791 /*
3792 * If the cupsd.conf file was updated, set the NeedReload flag...
3793 */
3794
3795 if (!strcmp(con->uri, "/admin/conf/cupsd.conf"))
3796 NeedReload = RELOAD_CUPSD;
3797 else
3798 NeedReload = RELOAD_ALL;
3799
3800 ReloadTime = time(NULL);
3801
3802 /*
3803 * Return that the file was created successfully...
3804 */
3805
3806 return (HTTP_CREATED);
3807 }
3808
3809
3810 /*
3811 * 'is_cgi()' - Is the resource a CGI script/program?
3812 */
3813
3814 static int /* O - 1 = CGI, 0 = file */
3815 is_cgi(cupsd_client_t *con, /* I - Client connection */
3816 const char *filename, /* I - Real filename */
3817 struct stat *filestats, /* I - File information */
3818 mime_type_t *type) /* I - MIME type */
3819 {
3820 const char *options; /* Options on URL */
3821
3822
3823 /*
3824 * Get the options, if any...
3825 */
3826
3827 if ((options = strchr(con->uri, '?')) != NULL)
3828 {
3829 options ++;
3830 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", options);
3831 }
3832
3833 /*
3834 * Check for known types...
3835 */
3836
3837 if (!type || strcasecmp(type->super, "application"))
3838 {
3839 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3840 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3841 "type=%s/%s) = 0", con, con->http.fd, filename, filestats,
3842 type ? type->super : "unknown",
3843 type ? type->type : "unknown");
3844 return (0);
3845 }
3846
3847 if (!strcasecmp(type->type, "x-httpd-cgi") &&
3848 (filestats->st_mode & 0111))
3849 {
3850 /*
3851 * "application/x-httpd-cgi" is a CGI script.
3852 */
3853
3854 cupsdSetString(&con->command, filename);
3855
3856 if (options)
3857 cupsdSetStringf(&con->options, " %s", options);
3858
3859 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3860 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3861 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3862 type ? type->super : "unknown",
3863 type ? type->type : "unknown");
3864 return (1);
3865 }
3866 #ifdef HAVE_JAVA
3867 else if (!strcasecmp(type->type, "x-httpd-java"))
3868 {
3869 /*
3870 * "application/x-httpd-java" is a Java servlet.
3871 */
3872
3873 cupsdSetString(&con->command, CUPS_JAVA);
3874
3875 if (options)
3876 cupsdSetStringf(&con->options, " %s %s", filename, options);
3877 else
3878 cupsdSetStringf(&con->options, " %s", filename);
3879
3880 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3881 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3882 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3883 type ? type->super : "unknown",
3884 type ? type->type : "unknown");
3885 return (1);
3886 }
3887 #endif /* HAVE_JAVA */
3888 #ifdef HAVE_PERL
3889 else if (!strcasecmp(type->type, "x-httpd-perl"))
3890 {
3891 /*
3892 * "application/x-httpd-perl" is a Perl page.
3893 */
3894
3895 cupsdSetString(&con->command, CUPS_PERL);
3896
3897 if (options)
3898 cupsdSetStringf(&con->options, " %s %s", filename, options);
3899 else
3900 cupsdSetStringf(&con->options, " %s", filename);
3901
3902 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3903 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3904 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3905 type ? type->super : "unknown",
3906 type ? type->type : "unknown");
3907 return (1);
3908 }
3909 #endif /* HAVE_PERL */
3910 #ifdef HAVE_PHP
3911 else if (!strcasecmp(type->type, "x-httpd-php"))
3912 {
3913 /*
3914 * "application/x-httpd-php" is a PHP page.
3915 */
3916
3917 cupsdSetString(&con->command, CUPS_PHP);
3918
3919 if (options)
3920 cupsdSetStringf(&con->options, " %s %s", filename, options);
3921 else
3922 cupsdSetStringf(&con->options, " %s", filename);
3923
3924 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3925 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3926 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3927 type ? type->super : "unknown",
3928 type ? type->type : "unknown");
3929 return (1);
3930 }
3931 #endif /* HAVE_PHP */
3932 #ifdef HAVE_PYTHON
3933 else if (!strcasecmp(type->type, "x-httpd-python"))
3934 {
3935 /*
3936 * "application/x-httpd-python" is a Python page.
3937 */
3938
3939 cupsdSetString(&con->command, CUPS_PYTHON);
3940
3941 if (options)
3942 cupsdSetStringf(&con->options, " %s %s", filename, options);
3943 else
3944 cupsdSetStringf(&con->options, " %s", filename);
3945
3946 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3947 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3948 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3949 type ? type->super : "unknown",
3950 type ? type->type : "unknown");
3951 return (1);
3952 }
3953 #endif /* HAVE_PYTHON */
3954
3955 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3956 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3957 "type=%s/%s) = 0", con, con->http.fd, filename, filestats,
3958 type ? type->super : "unknown",
3959 type ? type->type : "unknown");
3960 return (0);
3961 }
3962
3963
3964 /*
3965 * 'is_path_absolute()' - Is a path absolute and free of relative elements (i.e. "..").
3966 */
3967
3968 static int /* O - 0 if relative, 1 if absolute */
3969 is_path_absolute(const char *path) /* I - Input path */
3970 {
3971 /*
3972 * Check for a leading slash...
3973 */
3974
3975 if (path[0] != '/')
3976 return (0);
3977
3978 /*
3979 * Check for "/.." in the path...
3980 */
3981
3982 while ((path = strstr(path, "/..")) != NULL)
3983 {
3984 if (!path[3] || path[3] == '/')
3985 return (0);
3986
3987 path ++;
3988 }
3989
3990 /*
3991 * If we haven't found any relative paths, return 1 indicating an
3992 * absolute path...
3993 */
3994
3995 return (1);
3996 }
3997
3998
3999 #ifdef HAVE_SSL
4000 /*
4001 * 'make_certificate()' - Make a self-signed SSL/TLS certificate.
4002 */
4003
4004 static int /* O - 1 on success, 0 on failure */
4005 make_certificate(cupsd_client_t *con) /* I - Client connection */
4006 {
4007 #if defined(HAVE_LIBSSL) && defined(HAVE_WAITPID)
4008 int pid, /* Process ID of command */
4009 status; /* Status of command */
4010 char command[1024], /* Command */
4011 *argv[12], /* Command-line arguments */
4012 *envp[MAX_ENV + 1], /* Environment variables */
4013 home[1024], /* HOME environment variable */
4014 infofile[1024], /* Type-in information for cert */
4015 seedfile[1024]; /* Random number seed file */
4016 int envc, /* Number of environment variables */
4017 bytes; /* Bytes written */
4018 cups_file_t *fp; /* Seed/info file */
4019 int infofd; /* Info file descriptor */
4020
4021
4022 /*
4023 * Run the "openssl" command to seed the random number generator and
4024 * generate a self-signed certificate that is good for 10 years:
4025 *
4026 * openssl rand -rand seedfile 1
4027 *
4028 * openssl req -new -x509 -keyout ServerKey \
4029 * -out ServerCertificate -days 3650 -nodes
4030 *
4031 * The seeding step is crucial in ensuring that the openssl command
4032 * does not block on systems without sufficient entropy...
4033 */
4034
4035 if (!cupsFileFind("openssl", getenv("PATH"), 1, command, sizeof(command)))
4036 {
4037 cupsdLogMessage(CUPSD_LOG_ERROR,
4038 "No SSL certificate and openssl command not found!");
4039 return (0);
4040 }
4041
4042 if (access("/dev/urandom", 0))
4043 {
4044 /*
4045 * If the system doesn't provide /dev/urandom, then any random source
4046 * will probably be blocking-style, so generate some random data to
4047 * use as a seed for the certificate. Note that we have already
4048 * seeded the random number generator in cupsdInitCerts()...
4049 */
4050
4051 cupsdLogMessage(CUPSD_LOG_INFO,
4052 "Seeding the random number generator...");
4053
4054 snprintf(home, sizeof(home), "HOME=%s", TempDir);
4055
4056 /*
4057 * Write the seed file...
4058 */
4059
4060 if ((fp = cupsTempFile2(seedfile, sizeof(seedfile))) == NULL)
4061 {
4062 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create seed file %s - %s",
4063 seedfile, strerror(errno));
4064 return (0);
4065 }
4066
4067 for (bytes = 0; bytes < 262144; bytes ++)
4068 cupsFilePutChar(fp, random());
4069
4070 cupsFileClose(fp);
4071
4072 /*
4073 * Run the openssl command to seed its random number generator...
4074 */
4075
4076 argv[0] = "openssl";
4077 argv[1] = "rand";
4078 argv[2] = "-rand";
4079 argv[3] = seedfile;
4080 argv[4] = "1";
4081 argv[5] = NULL;
4082
4083 envc = cupsdLoadEnv(envp, MAX_ENV);
4084 envp[envc++] = home;
4085 envp[envc] = NULL;
4086
4087 if (!cupsdStartProcess(command, argv, envp, -1, -1, -1, -1, -1, 1, NULL,
4088 NULL, &pid))
4089 {
4090 unlink(seedfile);
4091 return (0);
4092 }
4093
4094 while (waitpid(pid, &status, 0) < 0)
4095 if (errno != EINTR)
4096 {
4097 status = 1;
4098 break;
4099 }
4100
4101 cupsdFinishProcess(pid, command, sizeof(command), NULL);
4102
4103 /*
4104 * Remove the seed file, as it is no longer needed...
4105 */
4106
4107 unlink(seedfile);
4108
4109 if (status)
4110 {
4111 if (WIFEXITED(status))
4112 cupsdLogMessage(CUPSD_LOG_ERROR,
4113 "Unable to seed random number generator - "
4114 "the openssl command stopped with status %d!",
4115 WEXITSTATUS(status));
4116 else
4117 cupsdLogMessage(CUPSD_LOG_ERROR,
4118 "Unable to seed random number generator - "
4119 "the openssl command crashed on signal %d!",
4120 WTERMSIG(status));
4121
4122 return (0);
4123 }
4124 }
4125
4126 /*
4127 * Create a file with the certificate information fields...
4128 *
4129 * Note: This assumes that the default questions are asked by the openssl
4130 * command...
4131 */
4132
4133 if ((fp = cupsTempFile2(infofile, sizeof(infofile))) == NULL)
4134 {
4135 cupsdLogMessage(CUPSD_LOG_ERROR,
4136 "Unable to create certificate information file %s - %s",
4137 infofile, strerror(errno));
4138 return (0);
4139 }
4140
4141 cupsFilePrintf(fp, ".\n.\n.\n%s\n.\n%s\n%s\n",
4142 ServerName, ServerName, ServerAdmin);
4143 cupsFileClose(fp);
4144
4145 cupsdLogMessage(CUPSD_LOG_INFO,
4146 "Generating SSL server key and certificate...");
4147
4148 argv[0] = "openssl";
4149 argv[1] = "req";
4150 argv[2] = "-new";
4151 argv[3] = "-x509";
4152 argv[4] = "-keyout";
4153 argv[5] = ServerKey;
4154 argv[6] = "-out";
4155 argv[7] = ServerCertificate;
4156 argv[8] = "-days";
4157 argv[9] = "3650";
4158 argv[10] = "-nodes";
4159 argv[11] = NULL;
4160
4161 cupsdLoadEnv(envp, MAX_ENV);
4162
4163 infofd = open(infofile, O_RDONLY);
4164
4165 if (!cupsdStartProcess(command, argv, envp, infofd, -1, -1, -1, -1, 1, NULL,
4166 NULL, &pid))
4167 {
4168 close(infofd);
4169 unlink(infofile);
4170 return (0);
4171 }
4172
4173 close(infofd);
4174 unlink(infofile);
4175
4176 while (waitpid(pid, &status, 0) < 0)
4177 if (errno != EINTR)
4178 {
4179 status = 1;
4180 break;
4181 }
4182
4183 cupsdFinishProcess(pid, command, sizeof(command), NULL);
4184
4185 if (status)
4186 {
4187 if (WIFEXITED(status))
4188 cupsdLogMessage(CUPSD_LOG_ERROR,
4189 "Unable to create SSL server key and certificate - "
4190 "the openssl command stopped with status %d!",
4191 WEXITSTATUS(status));
4192 else
4193 cupsdLogMessage(CUPSD_LOG_ERROR,
4194 "Unable to create SSL server key and certificate - "
4195 "the openssl command crashed on signal %d!",
4196 WTERMSIG(status));
4197 }
4198 else
4199 {
4200 cupsdLogMessage(CUPSD_LOG_INFO, "Created SSL server key file \"%s\"...",
4201 ServerKey);
4202 cupsdLogMessage(CUPSD_LOG_INFO,
4203 "Created SSL server certificate file \"%s\"...",
4204 ServerCertificate);
4205 }
4206
4207 return (!status);
4208
4209 #elif defined(HAVE_GNUTLS)
4210 gnutls_x509_crt crt; /* Self-signed certificate */
4211 gnutls_x509_privkey key; /* Encryption key */
4212 cups_lang_t *language; /* Default language info */
4213 cups_file_t *fp; /* Key/cert file */
4214 unsigned char buffer[8192]; /* Buffer for x509 data */
4215 size_t bytes; /* Number of bytes of data */
4216 unsigned char serial[4]; /* Serial number buffer */
4217 time_t curtime; /* Current time */
4218 int result; /* Result of GNU TLS calls */
4219
4220
4221 /*
4222 * Create the encryption key...
4223 */
4224
4225 cupsdLogMessage(CUPSD_LOG_INFO, "Generating SSL server key...");
4226
4227 gnutls_x509_privkey_init(&key);
4228 gnutls_x509_privkey_generate(key, GNUTLS_PK_RSA, 2048, 0);
4229
4230 /*
4231 * Save it...
4232 */
4233
4234 bytes = sizeof(buffer);
4235
4236 if ((result = gnutls_x509_privkey_export(key, GNUTLS_X509_FMT_PEM,
4237 buffer, &bytes)) < 0)
4238 {
4239 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to export SSL server key - %s",
4240 gnutls_strerror(result));
4241 gnutls_x509_privkey_deinit(key);
4242 return (0);
4243 }
4244 else if ((fp = cupsFileOpen(ServerKey, "w")) != NULL)
4245 {
4246 cupsFileWrite(fp, (char *)buffer, bytes);
4247 cupsFileClose(fp);
4248
4249 cupsdLogMessage(CUPSD_LOG_INFO, "Created SSL server key file \"%s\"...",
4250 ServerKey);
4251 }
4252 else
4253 {
4254 cupsdLogMessage(CUPSD_LOG_ERROR,
4255 "Unable to create SSL server key file \"%s\" - %s",
4256 ServerKey, strerror(errno));
4257 gnutls_x509_privkey_deinit(key);
4258 return (0);
4259 }
4260
4261 /*
4262 * Create the self-signed certificate...
4263 */
4264
4265 cupsdLogMessage(CUPSD_LOG_INFO, "Generating self-signed SSL certificate...");
4266
4267 language = cupsLangDefault();
4268 curtime = time(NULL);
4269 serial[0] = curtime >> 24;
4270 serial[1] = curtime >> 16;
4271 serial[2] = curtime >> 8;
4272 serial[3] = curtime;
4273
4274 gnutls_x509_crt_init(&crt);
4275 if (strlen(language->language) == 5)
4276 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0,
4277 language->language + 3, 2);
4278 else
4279 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0,
4280 "US", 2);
4281 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0,
4282 ServerName, strlen(ServerName));
4283 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATION_NAME, 0,
4284 ServerName, strlen(ServerName));
4285 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATIONAL_UNIT_NAME,
4286 0, "Unknown", 7);
4287 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_STATE_OR_PROVINCE_NAME, 0,
4288 "Unknown", 7);
4289 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_LOCALITY_NAME, 0,
4290 "Unknown", 7);
4291 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_PKCS9_EMAIL, 0,
4292 ServerAdmin, strlen(ServerAdmin));
4293 gnutls_x509_crt_set_key(crt, key);
4294 gnutls_x509_crt_set_serial(crt, serial, sizeof(serial));
4295 gnutls_x509_crt_set_activation_time(crt, curtime);
4296 gnutls_x509_crt_set_expiration_time(crt, curtime + 10 * 365 * 86400);
4297 gnutls_x509_crt_set_ca_status(crt, 0);
4298 gnutls_x509_crt_set_subject_alternative_name(crt, GNUTLS_SAN_DNSNAME,
4299 ServerName);
4300 gnutls_x509_crt_set_key_purpose_oid(crt, GNUTLS_KP_TLS_WWW_SERVER, 0);
4301 gnutls_x509_crt_set_key_usage(crt, GNUTLS_KEY_KEY_ENCIPHERMENT);
4302 gnutls_x509_crt_set_version(crt, 3);
4303
4304 bytes = sizeof(buffer);
4305 if (gnutls_x509_crt_get_key_id(crt, 0, buffer, &bytes) >= 0)
4306 gnutls_x509_crt_set_subject_key_id(crt, buffer, bytes);
4307
4308 gnutls_x509_crt_sign(crt, crt, key);
4309
4310 /*
4311 * Save it...
4312 */
4313
4314 bytes = sizeof(buffer);
4315 if ((result = gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM,
4316 buffer, &bytes)) < 0)
4317 cupsdLogMessage(CUPSD_LOG_ERROR,
4318 "Unable to export SSL server certificate - %s",
4319 gnutls_strerror(result));
4320 else if ((fp = cupsFileOpen(ServerCertificate, "w")) != NULL)
4321 {
4322 cupsFileWrite(fp, (char *)buffer, bytes);
4323 cupsFileClose(fp);
4324
4325 cupsdLogMessage(CUPSD_LOG_INFO,
4326 "Created SSL server certificate file \"%s\"...",
4327 ServerCertificate);
4328 }
4329 else
4330 cupsdLogMessage(CUPSD_LOG_ERROR,
4331 "Unable to create SSL server certificate file \"%s\" - %s",
4332 ServerCertificate, strerror(errno));
4333
4334 /*
4335 * Cleanup...
4336 */
4337
4338 gnutls_x509_crt_deinit(crt);
4339 gnutls_x509_privkey_deinit(key);
4340
4341 return (1);
4342
4343 #elif defined(HAVE_CDSASSL) && defined(HAVE_WAITPID)
4344 int pid, /* Process ID of command */
4345 status; /* Status of command */
4346 char command[1024], /* Command */
4347 *argv[4], /* Command-line arguments */
4348 *envp[MAX_ENV + 1], /* Environment variables */
4349 keychain[1024], /* Keychain argument */
4350 infofile[1024]; /* Type-in information for cert */
4351 cups_file_t *fp; /* Seed/info file */
4352 int infofd; /* Info file descriptor */
4353
4354
4355 /*
4356 * Run the "certtool" command to generate a self-signed certificate...
4357 */
4358
4359 if (!cupsFileFind("certtool", getenv("PATH"), 1, command, sizeof(command)))
4360 {
4361 cupsdLogMessage(CUPSD_LOG_ERROR,
4362 "No SSL certificate and certtool command not found!");
4363 return (0);
4364 }
4365
4366 /*
4367 * Create a file with the certificate information fields...
4368 *
4369 * Note: This assumes that the default questions are asked by the certtool
4370 * command...
4371 */
4372
4373 if ((fp = cupsTempFile2(infofile, sizeof(infofile))) == NULL)
4374 {
4375 cupsdLogMessage(CUPSD_LOG_ERROR,
4376 "Unable to create certificate information file %s - %s",
4377 infofile, strerror(errno));
4378 return (0);
4379 }
4380
4381 cupsFilePrintf(fp, "%s\nr\n\ny\nb\ns\ny\n%s\n\n\n\n\n%s\ny\n",
4382 con->servername, con->servername, ServerAdmin);
4383 cupsFileClose(fp);
4384
4385 cupsdLogMessage(CUPSD_LOG_INFO,
4386 "Generating SSL server key and certificate...");
4387
4388 snprintf(keychain, sizeof(keychain), "k=%s", ServerCertificate);
4389
4390 argv[0] = "certtool";
4391 argv[1] = "c";
4392 argv[2] = keychain;
4393 argv[3] = NULL;
4394
4395 cupsdLoadEnv(envp, MAX_ENV);
4396
4397 infofd = open(infofile, O_RDONLY);
4398
4399 if (!cupsdStartProcess(command, argv, envp, infofd, -1, -1, -1, -1, 1, NULL,
4400 NULL, &pid))
4401 {
4402 close(infofd);
4403 unlink(infofile);
4404 return (0);
4405 }
4406
4407 close(infofd);
4408 unlink(infofile);
4409
4410 while (waitpid(pid, &status, 0) < 0)
4411 if (errno != EINTR)
4412 {
4413 status = 1;
4414 break;
4415 }
4416
4417 cupsdFinishProcess(pid, command, sizeof(command), NULL);
4418
4419 if (status)
4420 {
4421 if (WIFEXITED(status))
4422 cupsdLogMessage(CUPSD_LOG_ERROR,
4423 "Unable to create SSL server key and certificate - "
4424 "the certtool command stopped with status %d!",
4425 WEXITSTATUS(status));
4426 else
4427 cupsdLogMessage(CUPSD_LOG_ERROR,
4428 "Unable to create SSL server key and certificate - "
4429 "the certtool command crashed on signal %d!",
4430 WTERMSIG(status));
4431 }
4432 else
4433 {
4434 cupsdLogMessage(CUPSD_LOG_INFO,
4435 "Created SSL server certificate file \"%s\"...",
4436 ServerCertificate);
4437 }
4438
4439 return (!status);
4440
4441 #else
4442 return (0);
4443 #endif /* HAVE_LIBSSL && HAVE_WAITPID */
4444 }
4445 #endif /* HAVE_SSL */
4446
4447
4448 /*
4449 * 'pipe_command()' - Pipe the output of a command to the remote client.
4450 */
4451
4452 static int /* O - Process ID */
4453 pipe_command(cupsd_client_t *con, /* I - Client connection */
4454 int infile, /* I - Standard input for command */
4455 int *outfile, /* O - Standard output for command */
4456 char *command, /* I - Command to run */
4457 char *options, /* I - Options for command */
4458 int root) /* I - Run as root? */
4459 {
4460 int i; /* Looping var */
4461 int pid; /* Process ID */
4462 char *commptr, /* Command string pointer */
4463 commch; /* Command string character */
4464 char *uriptr; /* URI string pointer */
4465 int fds[2]; /* Pipe FDs */
4466 int argc; /* Number of arguments */
4467 int envc; /* Number of environment variables */
4468 char argbuf[10240], /* Argument buffer */
4469 *argv[100], /* Argument strings */
4470 *envp[MAX_ENV + 20]; /* Environment variables */
4471 char auth_type[256], /* CUPSD_AUTH_TYPE environment variable */
4472 content_length[1024], /* CONTENT_LENGTH environment variable */
4473 content_type[1024], /* CONTENT_TYPE environment variable */
4474 http_cookie[32768], /* HTTP_COOKIE environment variable */
4475 http_referer[1024], /* HTTP_REFERER environment variable */
4476 http_user_agent[1024], /* HTTP_USER_AGENT environment variable */
4477 lang[1024], /* LANG environment variable */
4478 path_info[1024], /* PATH_INFO environment variable */
4479 remote_addr[1024], /* REMOTE_ADDR environment variable */
4480 remote_host[1024], /* REMOTE_HOST environment variable */
4481 remote_user[1024], /* REMOTE_USER environment variable */
4482 script_filename[1024], /* SCRIPT_FILENAME environment variable */
4483 script_name[1024], /* SCRIPT_NAME environment variable */
4484 server_name[1024], /* SERVER_NAME environment variable */
4485 server_port[1024]; /* SERVER_PORT environment variable */
4486 ipp_attribute_t *attr; /* attributes-natural-language attribute */
4487 void *ccache = NULL; /* Kerberos credentials */
4488
4489
4490 /*
4491 * Parse a copy of the options string, which is of the form:
4492 *
4493 * argument+argument+argument
4494 * ?argument+argument+argument
4495 * param=value&param=value
4496 * ?param=value&param=value
4497 * /name?argument+argument+argument
4498 * /name?param=value&param=value
4499 *
4500 * If the string contains an "=" character after the initial name,
4501 * then we treat it as a HTTP GET form request and make a copy of
4502 * the remaining string for the environment variable.
4503 *
4504 * The string is always parsed out as command-line arguments, to
4505 * be consistent with Apache...
4506 */
4507
4508 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4509 "pipe_command(con=%p(%d), infile=%d, outfile=%p, "
4510 "command=\"%s\", options=\"%s\", root=%d)",
4511 con, con->http.fd, infile, outfile, command,
4512 options ? options : "(null)", root);
4513
4514 argv[0] = command;
4515
4516 if (options)
4517 strlcpy(argbuf, options, sizeof(argbuf));
4518 else
4519 argbuf[0] = '\0';
4520
4521 if (argbuf[0] == '/')
4522 {
4523 /*
4524 * Found some trailing path information, set PATH_INFO...
4525 */
4526
4527 if ((commptr = strchr(argbuf, '?')) == NULL)
4528 commptr = argbuf + strlen(argbuf);
4529
4530 commch = *commptr;
4531 *commptr = '\0';
4532 snprintf(path_info, sizeof(path_info), "PATH_INFO=%s", argbuf);
4533 *commptr = commch;
4534 }
4535 else
4536 {
4537 commptr = argbuf;
4538 path_info[0] = '\0';
4539
4540 if (*commptr == ' ')
4541 commptr ++;
4542 }
4543
4544 if (*commptr == '?' && con->operation == HTTP_GET && !con->query_string)
4545 {
4546 commptr ++;
4547 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", commptr);
4548 }
4549
4550 argc = 1;
4551
4552 if (*commptr)
4553 {
4554 argv[argc ++] = commptr;
4555
4556 for (; *commptr && argc < 99; commptr ++)
4557 {
4558 /*
4559 * Break arguments whenever we see a + or space...
4560 */
4561
4562 if (*commptr == ' ' || *commptr == '+')
4563 {
4564 while (*commptr == ' ' || *commptr == '+')
4565 *commptr++ = '\0';
4566
4567 /*
4568 * If we don't have a blank string, save it as another argument...
4569 */
4570
4571 if (*commptr)
4572 {
4573 argv[argc] = commptr;
4574 argc ++;
4575 }
4576 else
4577 break;
4578 }
4579 else if (*commptr == '%' && isxdigit(commptr[1] & 255) &&
4580 isxdigit(commptr[2] & 255))
4581 {
4582 /*
4583 * Convert the %xx notation to the individual character.
4584 */
4585
4586 if (commptr[1] >= '0' && commptr[1] <= '9')
4587 *commptr = (commptr[1] - '0') << 4;
4588 else
4589 *commptr = (tolower(commptr[1]) - 'a' + 10) << 4;
4590
4591 if (commptr[2] >= '0' && commptr[2] <= '9')
4592 *commptr |= commptr[2] - '0';
4593 else
4594 *commptr |= tolower(commptr[2]) - 'a' + 10;
4595
4596 _cups_strcpy(commptr + 1, commptr + 3);
4597
4598 /*
4599 * Check for a %00 and break if that is the case...
4600 */
4601
4602 if (!*commptr)
4603 break;
4604 }
4605 }
4606 }
4607
4608 argv[argc] = NULL;
4609
4610 /*
4611 * Setup the environment variables as needed...
4612 */
4613
4614 if (con->username[0])
4615 {
4616 snprintf(auth_type, sizeof(auth_type), "CUPSD_AUTH_TYPE=%s",
4617 httpGetField(HTTP(con), HTTP_FIELD_AUTHORIZATION));
4618
4619 if ((uriptr = strchr(auth_type + 10, ' ')) != NULL)
4620 *uriptr = '\0';
4621 }
4622 else
4623 auth_type[0] = '\0';
4624
4625 if (con->request &&
4626 (attr = ippFindAttribute(con->request, "attributes-natural-language",
4627 IPP_TAG_LANGUAGE)) != NULL)
4628 {
4629 switch (strlen(attr->values[0].string.text))
4630 {
4631 default :
4632 /*
4633 * This is an unknown or badly formatted language code; use
4634 * the POSIX locale...
4635 */
4636
4637 strcpy(lang, "LANG=C");
4638 break;
4639
4640 case 2 :
4641 /*
4642 * Just the language code (ll)...
4643 */
4644
4645 snprintf(lang, sizeof(lang), "LANG=%s.UTF8",
4646 attr->values[0].string.text);
4647 break;
4648
4649 case 5 :
4650 /*
4651 * Language and country code (ll-cc)...
4652 */
4653
4654 snprintf(lang, sizeof(lang), "LANG=%c%c_%c%c.UTF8",
4655 attr->values[0].string.text[0],
4656 attr->values[0].string.text[1],
4657 toupper(attr->values[0].string.text[3] & 255),
4658 toupper(attr->values[0].string.text[4] & 255));
4659 break;
4660 }
4661 }
4662 else if (con->language)
4663 snprintf(lang, sizeof(lang), "LANG=%s.UTF8", con->language->language);
4664 else
4665 strcpy(lang, "LANG=C");
4666
4667 strcpy(remote_addr, "REMOTE_ADDR=");
4668 httpAddrString(con->http.hostaddr, remote_addr + 12,
4669 sizeof(remote_addr) - 12);
4670
4671 snprintf(remote_host, sizeof(remote_host), "REMOTE_HOST=%s",
4672 con->http.hostname);
4673
4674 snprintf(script_name, sizeof(script_name), "SCRIPT_NAME=%s", con->uri);
4675 if ((uriptr = strchr(script_name, '?')) != NULL)
4676 *uriptr = '\0';
4677
4678 snprintf(script_filename, sizeof(script_filename), "SCRIPT_FILENAME=%s%s",
4679 DocumentRoot, script_name + 12);
4680
4681 sprintf(server_port, "SERVER_PORT=%d", con->serverport);
4682
4683 snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s",
4684 con->servername);
4685
4686 envc = cupsdLoadEnv(envp, (int)(sizeof(envp) / sizeof(envp[0])));
4687
4688 if (auth_type[0])
4689 envp[envc ++] = auth_type;
4690
4691 envp[envc ++] = lang;
4692 envp[envc ++] = "REDIRECT_STATUS=1";
4693 envp[envc ++] = "GATEWAY_INTERFACE=CGI/1.1";
4694 envp[envc ++] = server_name;
4695 envp[envc ++] = server_port;
4696 envp[envc ++] = remote_addr;
4697 envp[envc ++] = remote_host;
4698 envp[envc ++] = script_name;
4699 envp[envc ++] = script_filename;
4700
4701 if (path_info[0])
4702 envp[envc ++] = path_info;
4703
4704 if (con->username[0])
4705 {
4706 snprintf(remote_user, sizeof(remote_user), "REMOTE_USER=%s", con->username);
4707
4708 envp[envc ++] = remote_user;
4709
4710 /*
4711 * Save Kerberos credentials, if any...
4712 */
4713
4714 #ifdef HAVE_GSSAPI
4715 if (con->gss_creds)
4716 ccache = cupsdCopyKrb5Creds(con);
4717 #endif /* HAVE_GSSAPI */
4718 }
4719
4720 if (con->http.version == HTTP_1_1)
4721 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.1";
4722 else if (con->http.version == HTTP_1_0)
4723 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.0";
4724 else
4725 envp[envc ++] = "SERVER_PROTOCOL=HTTP/0.9";
4726
4727 if (con->http.cookie)
4728 {
4729 snprintf(http_cookie, sizeof(http_cookie), "HTTP_COOKIE=%s",
4730 con->http.cookie);
4731 envp[envc ++] = http_cookie;
4732 }
4733
4734 if (con->http.fields[HTTP_FIELD_USER_AGENT][0])
4735 {
4736 snprintf(http_user_agent, sizeof(http_user_agent), "HTTP_USER_AGENT=%s",
4737 con->http.fields[HTTP_FIELD_USER_AGENT]);
4738 envp[envc ++] = http_user_agent;
4739 }
4740
4741 if (con->http.fields[HTTP_FIELD_REFERER][0])
4742 {
4743 snprintf(http_referer, sizeof(http_referer), "HTTP_REFERER=%s",
4744 con->http.fields[HTTP_FIELD_REFERER]);
4745 envp[envc ++] = http_referer;
4746 }
4747
4748 if (con->operation == HTTP_GET)
4749 {
4750 envp[envc ++] = "REQUEST_METHOD=GET";
4751
4752 if (con->query_string)
4753 {
4754 /*
4755 * Add GET form variables after ?...
4756 */
4757
4758 envp[envc ++] = con->query_string;
4759 }
4760 else
4761 envp[envc ++] = "QUERY_STRING=";
4762 }
4763 else
4764 {
4765 sprintf(content_length, "CONTENT_LENGTH=" CUPS_LLFMT,
4766 CUPS_LLCAST con->bytes);
4767 snprintf(content_type, sizeof(content_type), "CONTENT_TYPE=%s",
4768 con->http.fields[HTTP_FIELD_CONTENT_TYPE]);
4769
4770 envp[envc ++] = "REQUEST_METHOD=POST";
4771 envp[envc ++] = content_length;
4772 envp[envc ++] = content_type;
4773 }
4774
4775 /*
4776 * Tell the CGI if we are using encryption...
4777 */
4778
4779 if (con->http.tls)
4780 envp[envc ++] = "HTTPS=ON";
4781
4782 /*
4783 * Terminate the environment array...
4784 */
4785
4786 envp[envc] = NULL;
4787
4788 if (LogLevel >= CUPSD_LOG_DEBUG)
4789 {
4790 for (i = 0; i < argc; i ++)
4791 cupsdLogMessage(CUPSD_LOG_DEBUG,
4792 "[CGI] argv[%d] = \"%s\"", i, argv[i]);
4793 for (i = 0; i < envc; i ++)
4794 cupsdLogMessage(CUPSD_LOG_DEBUG,
4795 "[CGI] envp[%d] = \"%s\"", i, envp[i]);
4796 }
4797
4798 /*
4799 * Create a pipe for the output...
4800 */
4801
4802 if (cupsdOpenPipe(fds))
4803 {
4804 cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to create pipe for %s - %s",
4805 argv[0], strerror(errno));
4806 return (0);
4807 }
4808
4809 /*
4810 * Then execute the command...
4811 */
4812
4813 if (cupsdStartProcess(command, argv, envp, infile, fds[1], CGIPipes[1],
4814 -1, -1, root, DefaultProfile, NULL, &pid) < 0)
4815 {
4816 /*
4817 * Error - can't fork!
4818 */
4819
4820 cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to start %s - %s", argv[0],
4821 strerror(errno));
4822
4823 cupsdClosePipe(fds);
4824 pid = 0;
4825 }
4826 else
4827 {
4828 /*
4829 * Fork successful - return the PID...
4830 */
4831
4832 if (con->username[0])
4833 cupsdAddCert(pid, con->username, ccache);
4834
4835 cupsdLogMessage(CUPSD_LOG_DEBUG, "[CGI] Started %s (PID %d)", command, pid);
4836
4837 *outfile = fds[0];
4838 close(fds[1]);
4839 }
4840
4841 return (pid);
4842 }
4843
4844
4845 /*
4846 * 'valid_host()' - Is the Host: field valid?
4847 */
4848
4849 static int /* O - 1 if valid, 0 if not */
4850 valid_host(cupsd_client_t *con) /* I - Client connection */
4851 {
4852 cupsd_alias_t *a; /* Current alias */
4853 cupsd_netif_t *netif; /* Current network interface */
4854 const char *host, /* Host field */
4855 *end; /* End character */
4856
4857
4858 host = con->http.fields[HTTP_FIELD_HOST];
4859
4860 if (httpAddrLocalhost(con->http.hostaddr))
4861 {
4862 /*
4863 * Only allow "localhost" or the equivalent IPv4 or IPv6 numerical
4864 * addresses when accessing CUPS via the loopback interface...
4865 */
4866
4867 return (!strcasecmp(host, "localhost") ||
4868 !strncasecmp(host, "localhost:", 10) ||
4869 !strcasecmp(host, "localhost.") ||
4870 !strncasecmp(host, "localhost.:", 11) ||
4871 #ifdef __linux
4872 !strcasecmp(host, "localhost.localdomain") ||
4873 !strncasecmp(host, "localhost.localdomain:", 22) ||
4874 #endif /* __linux */
4875 !strcmp(host, "127.0.0.1") ||
4876 !strncmp(host, "127.0.0.1:", 10) ||
4877 !strcmp(host, "[::1]") ||
4878 !strncmp(host, "[::1]:", 6));
4879 }
4880
4881 #ifdef HAVE_DNSSD
4882 /*
4883 * Check if the hostname is something.local (Bonjour); if so, allow it.
4884 */
4885
4886 if ((end = strrchr(host, '.')) != NULL &&
4887 (!strcasecmp(end, ".local") || !strncasecmp(end, ".local:", 7) ||
4888 !strcasecmp(end, ".local.") || !strncasecmp(end, ".local.:", 8)))
4889 return (1);
4890 #endif /* HAVE_DNSSD */
4891
4892 /*
4893 * Check if the hostname is an IP address...
4894 */
4895
4896 if (isdigit(*host & 255) || *host == '[')
4897 {
4898 /*
4899 * Possible IPv4/IPv6 address...
4900 */
4901
4902 char temp[1024], /* Temporary string */
4903 *ptr; /* Pointer into temporary string */
4904 http_addrlist_t *addrlist; /* List of addresses */
4905
4906
4907 strlcpy(temp, host, sizeof(temp));
4908 if ((ptr = strrchr(temp, ':')) != NULL && !strchr(ptr, ']'))
4909 *ptr = '\0'; /* Strip :port from host value */
4910
4911 if ((addrlist = httpAddrGetList(temp, AF_UNSPEC, NULL)) != NULL)
4912 {
4913 /*
4914 * Good IPv4/IPv6 address...
4915 */
4916
4917 httpAddrFreeList(addrlist);
4918 return (1);
4919 }
4920 }
4921
4922 /*
4923 * Check for (alias) name matches...
4924 */
4925
4926 for (a = (cupsd_alias_t *)cupsArrayFirst(ServerAlias);
4927 a;
4928 a = (cupsd_alias_t *)cupsArrayNext(ServerAlias))
4929 {
4930 /*
4931 * "ServerAlias *" allows all host values through...
4932 */
4933
4934 if (!strcmp(a->name, "*"))
4935 return (1);
4936
4937 if (!strncasecmp(host, a->name, a->namelen))
4938 {
4939 /*
4940 * Prefix matches; check the character at the end - it must be ":", ".",
4941 * ".:", or nul...
4942 */
4943
4944 end = host + a->namelen;
4945
4946 if (!*end || *end == ':' || (*end == '.' && (!end[1] || end[1] == ':')))
4947 return (1);
4948 }
4949 }
4950
4951 #ifdef HAVE_DNSSD
4952 for (a = (cupsd_alias_t *)cupsArrayFirst(DNSSDAlias);
4953 a;
4954 a = (cupsd_alias_t *)cupsArrayNext(DNSSDAlias))
4955 {
4956 /*
4957 * "ServerAlias *" allows all host values through...
4958 */
4959
4960 if (!strcmp(a->name, "*"))
4961 return (1);
4962
4963 if (!strncasecmp(host, a->name, a->namelen))
4964 {
4965 /*
4966 * Prefix matches; check the character at the end - it must be ":", ".",
4967 * ".:", or nul...
4968 */
4969
4970 end = host + a->namelen;
4971
4972 if (!*end || *end == ':' || (*end == '.' && (!end[1] || end[1] == ':')))
4973 return (1);
4974 }
4975 }
4976 #endif /* HAVE_DNSSD */
4977
4978 /*
4979 * Check for interface hostname matches...
4980 */
4981
4982 for (netif = (cupsd_netif_t *)cupsArrayFirst(NetIFList);
4983 netif;
4984 netif = (cupsd_netif_t *)cupsArrayNext(NetIFList))
4985 {
4986 if (!strncasecmp(host, netif->hostname, netif->hostlen))
4987 {
4988 /*
4989 * Prefix matches; check the character at the end - it must be ":", ".",
4990 * ".:", or nul...
4991 */
4992
4993 end = host + netif->hostlen;
4994
4995 if (!*end || *end == ':' || (*end == '.' && (!end[1] || end[1] == ':')))
4996 return (1);
4997 }
4998 }
4999
5000 return (0);
5001 }
5002
5003
5004 /*
5005 * 'write_file()' - Send a file via HTTP.
5006 */
5007
5008 static int /* O - 0 on failure, 1 on success */
5009 write_file(cupsd_client_t *con, /* I - Client connection */
5010 http_status_t code, /* I - HTTP status */
5011 char *filename, /* I - Filename */
5012 char *type, /* I - File type */
5013 struct stat *filestats) /* O - File information */
5014 {
5015 con->file = open(filename, O_RDONLY);
5016
5017 cupsdLogMessage(CUPSD_LOG_DEBUG2,
5018 "write_file(con=%p(%d), code=%d, filename=\"%s\" (%d), "
5019 "type=\"%s\", filestats=%p)", con, con->http.fd,
5020 code, filename, con->file, type ? type : "(null)", filestats);
5021
5022 if (con->file < 0)
5023 return (0);
5024
5025 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
5026
5027 con->pipe_pid = 0;
5028
5029 if (!cupsdSendHeader(con, code, type, CUPSD_AUTH_NONE))
5030 return (0);
5031
5032 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
5033 httpGetDateString(filestats->st_mtime)) < 0)
5034 return (0);
5035 if (httpPrintf(HTTP(con), "Content-Length: " CUPS_LLFMT "\r\n",
5036 CUPS_LLCAST filestats->st_size) < 0)
5037 return (0);
5038 if (httpPrintf(HTTP(con), "\r\n") < 0)
5039 return (0);
5040
5041 if (cupsdFlushHeader(con) < 0)
5042 return (0);
5043
5044 con->http.data_encoding = HTTP_ENCODE_LENGTH;
5045 con->http.data_remaining = filestats->st_size;
5046
5047 if (con->http.data_remaining <= INT_MAX)
5048 con->http._data_remaining = con->http.data_remaining;
5049 else
5050 con->http._data_remaining = INT_MAX;
5051
5052 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient,
5053 (cupsd_selfunc_t)cupsdWriteClient, con);
5054
5055 return (1);
5056 }
5057
5058
5059 /*
5060 * 'write_pipe()' - Flag that data is available on the CGI pipe.
5061 */
5062
5063 static void
5064 write_pipe(cupsd_client_t *con) /* I - Client connection */
5065 {
5066 cupsdLogMessage(CUPSD_LOG_DEBUG2,
5067 "write_pipe(con=%p(%d)) CGI output on fd %d",
5068 con, con->http.fd, con->file);
5069
5070 con->file_ready = 1;
5071
5072 cupsdRemoveSelect(con->file);
5073 cupsdAddSelect(con->http.fd, NULL, (cupsd_selfunc_t)cupsdWriteClient, con);
5074 }
5075
5076
5077 /*
5078 * End of "$Id: client.c 7950 2008-09-17 00:21:59Z mike $".
5079 */
Unnamed repository; edit this file 'description' to name the repository.