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1 | /* | |
2 | * Client routines for the CUPS scheduler. | |
3 | * | |
4 | * Copyright © 2007-2019 by Apple Inc. | |
5 | * Copyright © 1997-2007 by Easy Software Products, all rights reserved. | |
6 | * | |
7 | * This file contains Kerberos support code, copyright 2006 by | |
8 | * Jelmer Vernooij. | |
9 | * | |
10 | * Licensed under Apache License v2.0. See the file "LICENSE" for more | |
11 | * information. | |
12 | */ | |
13 | ||
14 | /* | |
15 | * Include necessary headers... | |
16 | */ | |
17 | ||
18 | #define _CUPS_NO_DEPRECATED | |
19 | #define _HTTP_NO_PRIVATE | |
20 | #include "cupsd.h" | |
21 | ||
22 | #ifdef __APPLE__ | |
23 | # include <libproc.h> | |
24 | #endif /* __APPLE__ */ | |
25 | #ifdef HAVE_TCPD_H | |
26 | # include <tcpd.h> | |
27 | #endif /* HAVE_TCPD_H */ | |
28 | ||
29 | ||
30 | /* | |
31 | * Local functions... | |
32 | */ | |
33 | ||
34 | static int check_if_modified(cupsd_client_t *con, | |
35 | struct stat *filestats); | |
36 | static int compare_clients(cupsd_client_t *a, cupsd_client_t *b, | |
37 | void *data); | |
38 | #ifdef HAVE_SSL | |
39 | static int cupsd_start_tls(cupsd_client_t *con, http_encryption_t e); | |
40 | #endif /* HAVE_SSL */ | |
41 | static char *get_file(cupsd_client_t *con, struct stat *filestats, | |
42 | char *filename, size_t len); | |
43 | static http_status_t install_cupsd_conf(cupsd_client_t *con); | |
44 | static int is_cgi(cupsd_client_t *con, const char *filename, | |
45 | struct stat *filestats, mime_type_t *type); | |
46 | static int is_path_absolute(const char *path); | |
47 | static int pipe_command(cupsd_client_t *con, int infile, int *outfile, | |
48 | char *command, char *options, int root); | |
49 | static int valid_host(cupsd_client_t *con); | |
50 | static int write_file(cupsd_client_t *con, http_status_t code, | |
51 | char *filename, char *type, | |
52 | struct stat *filestats); | |
53 | static void write_pipe(cupsd_client_t *con); | |
54 | ||
55 | ||
56 | /* | |
57 | * 'cupsdAcceptClient()' - Accept a new client. | |
58 | */ | |
59 | ||
60 | void | |
61 | cupsdAcceptClient(cupsd_listener_t *lis)/* I - Listener socket */ | |
62 | { | |
63 | const char *hostname; /* Hostname of client */ | |
64 | char name[256]; /* Hostname of client */ | |
65 | int count; /* Count of connections on a host */ | |
66 | cupsd_client_t *con, /* New client pointer */ | |
67 | *tempcon; /* Temporary client pointer */ | |
68 | socklen_t addrlen; /* Length of address */ | |
69 | http_addr_t temp; /* Temporary address variable */ | |
70 | static time_t last_dos = 0; /* Time of last DoS attack */ | |
71 | #ifdef HAVE_TCPD_H | |
72 | struct request_info wrap_req; /* TCP wrappers request information */ | |
73 | #endif /* HAVE_TCPD_H */ | |
74 | ||
75 | ||
76 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdAcceptClient(lis=%p(%d)) Clients=%d", lis, lis->fd, cupsArrayCount(Clients)); | |
77 | ||
78 | /* | |
79 | * Make sure we don't have a full set of clients already... | |
80 | */ | |
81 | ||
82 | if (cupsArrayCount(Clients) == MaxClients) | |
83 | return; | |
84 | ||
85 | cupsdSetBusyState(1); | |
86 | ||
87 | /* | |
88 | * Get a pointer to the next available client... | |
89 | */ | |
90 | ||
91 | if (!Clients) | |
92 | Clients = cupsArrayNew(NULL, NULL); | |
93 | ||
94 | if (!Clients) | |
95 | { | |
96 | cupsdLogMessage(CUPSD_LOG_ERROR, | |
97 | "Unable to allocate memory for clients array!"); | |
98 | cupsdPauseListening(); | |
99 | return; | |
100 | } | |
101 | ||
102 | if (!ActiveClients) | |
103 | ActiveClients = cupsArrayNew((cups_array_func_t)compare_clients, NULL); | |
104 | ||
105 | if (!ActiveClients) | |
106 | { | |
107 | cupsdLogMessage(CUPSD_LOG_ERROR, | |
108 | "Unable to allocate memory for active clients array!"); | |
109 | cupsdPauseListening(); | |
110 | return; | |
111 | } | |
112 | ||
113 | if ((con = calloc(1, sizeof(cupsd_client_t))) == NULL) | |
114 | { | |
115 | cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to allocate memory for client!"); | |
116 | cupsdPauseListening(); | |
117 | return; | |
118 | } | |
119 | ||
120 | /* | |
121 | * Accept the client and get the remote address... | |
122 | */ | |
123 | ||
124 | con->number = ++ LastClientNumber; | |
125 | con->file = -1; | |
126 | ||
127 | if ((con->http = httpAcceptConnection(lis->fd, 0)) == NULL) | |
128 | { | |
129 | if (errno == ENFILE || errno == EMFILE) | |
130 | cupsdPauseListening(); | |
131 | ||
132 | cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to accept client connection - %s.", | |
133 | strerror(errno)); | |
134 | free(con); | |
135 | ||
136 | return; | |
137 | } | |
138 | ||
139 | /* | |
140 | * Save the connected address and port number... | |
141 | */ | |
142 | ||
143 | addrlen = sizeof(con->clientaddr); | |
144 | ||
145 | if (getsockname(httpGetFd(con->http), (struct sockaddr *)&con->clientaddr, &addrlen) || addrlen == 0) | |
146 | con->clientaddr = lis->address; | |
147 | ||
148 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Server address is \"%s\".", httpAddrString(&con->clientaddr, name, sizeof(name))); | |
149 | ||
150 | /* | |
151 | * Check the number of clients on the same address... | |
152 | */ | |
153 | ||
154 | for (count = 0, tempcon = (cupsd_client_t *)cupsArrayFirst(Clients); | |
155 | tempcon; | |
156 | tempcon = (cupsd_client_t *)cupsArrayNext(Clients)) | |
157 | if (httpAddrEqual(httpGetAddress(tempcon->http), httpGetAddress(con->http))) | |
158 | { | |
159 | count ++; | |
160 | if (count >= MaxClientsPerHost) | |
161 | break; | |
162 | } | |
163 | ||
164 | if (count >= MaxClientsPerHost) | |
165 | { | |
166 | if ((time(NULL) - last_dos) >= 60) | |
167 | { | |
168 | last_dos = time(NULL); | |
169 | cupsdLogMessage(CUPSD_LOG_WARN, | |
170 | "Possible DoS attack - more than %d clients connecting " | |
171 | "from %s.", | |
172 | MaxClientsPerHost, | |
173 | httpGetHostname(con->http, name, sizeof(name))); | |
174 | } | |
175 | ||
176 | httpClose(con->http); | |
177 | free(con); | |
178 | return; | |
179 | } | |
180 | ||
181 | /* | |
182 | * Get the hostname or format the IP address as needed... | |
183 | */ | |
184 | ||
185 | if (HostNameLookups) | |
186 | hostname = httpResolveHostname(con->http, NULL, 0); | |
187 | else | |
188 | hostname = httpGetHostname(con->http, NULL, 0); | |
189 | ||
190 | if (hostname == NULL && HostNameLookups == 2) | |
191 | { | |
192 | /* | |
193 | * Can't have an unresolved IP address with double-lookups enabled... | |
194 | */ | |
195 | ||
196 | httpClose(con->http); | |
197 | ||
198 | cupsdLogClient(con, CUPSD_LOG_WARN, | |
199 | "Name lookup failed - connection from %s closed!", | |
200 | httpGetHostname(con->http, NULL, 0)); | |
201 | ||
202 | free(con); | |
203 | return; | |
204 | } | |
205 | ||
206 | if (HostNameLookups == 2) | |
207 | { | |
208 | /* | |
209 | * Do double lookups as needed... | |
210 | */ | |
211 | ||
212 | http_addrlist_t *addrlist, /* List of addresses */ | |
213 | *addr; /* Current address */ | |
214 | ||
215 | if ((addrlist = httpAddrGetList(hostname, AF_UNSPEC, NULL)) != NULL) | |
216 | { | |
217 | /* | |
218 | * See if the hostname maps to the same IP address... | |
219 | */ | |
220 | ||
221 | for (addr = addrlist; addr; addr = addr->next) | |
222 | if (httpAddrEqual(httpGetAddress(con->http), &(addr->addr))) | |
223 | break; | |
224 | } | |
225 | else | |
226 | addr = NULL; | |
227 | ||
228 | httpAddrFreeList(addrlist); | |
229 | ||
230 | if (!addr) | |
231 | { | |
232 | /* | |
233 | * Can't have a hostname that doesn't resolve to the same IP address | |
234 | * with double-lookups enabled... | |
235 | */ | |
236 | ||
237 | httpClose(con->http); | |
238 | ||
239 | cupsdLogClient(con, CUPSD_LOG_WARN, | |
240 | "IP lookup failed - connection from %s closed!", | |
241 | httpGetHostname(con->http, NULL, 0)); | |
242 | free(con); | |
243 | return; | |
244 | } | |
245 | } | |
246 | ||
247 | #ifdef HAVE_TCPD_H | |
248 | /* | |
249 | * See if the connection is denied by TCP wrappers... | |
250 | */ | |
251 | ||
252 | request_init(&wrap_req, RQ_DAEMON, "cupsd", RQ_FILE, httpGetFd(con->http), | |
253 | NULL); | |
254 | fromhost(&wrap_req); | |
255 | ||
256 | if (!hosts_access(&wrap_req)) | |
257 | { | |
258 | httpClose(con->http); | |
259 | ||
260 | cupsdLogClient(con, CUPSD_LOG_WARN, | |
261 | "Connection from %s refused by /etc/hosts.allow and " | |
262 | "/etc/hosts.deny rules.", httpGetHostname(con->http, NULL, 0)); | |
263 | free(con); | |
264 | return; | |
265 | } | |
266 | #endif /* HAVE_TCPD_H */ | |
267 | ||
268 | #ifdef AF_LOCAL | |
269 | if (httpAddrFamily(httpGetAddress(con->http)) == AF_LOCAL) | |
270 | { | |
271 | # ifdef __APPLE__ | |
272 | socklen_t peersize; /* Size of peer credentials */ | |
273 | pid_t peerpid; /* Peer process ID */ | |
274 | char peername[256]; /* Name of process */ | |
275 | ||
276 | peersize = sizeof(peerpid); | |
277 | if (!getsockopt(httpGetFd(con->http), SOL_LOCAL, LOCAL_PEERPID, &peerpid, | |
278 | &peersize)) | |
279 | { | |
280 | if (!proc_name((int)peerpid, peername, sizeof(peername))) | |
281 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
282 | "Accepted from %s (Domain ???[%d])", | |
283 | httpGetHostname(con->http, NULL, 0), (int)peerpid); | |
284 | else | |
285 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
286 | "Accepted from %s (Domain %s[%d])", | |
287 | httpGetHostname(con->http, NULL, 0), peername, (int)peerpid); | |
288 | } | |
289 | else | |
290 | # endif /* __APPLE__ */ | |
291 | ||
292 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Accepted from %s (Domain)", | |
293 | httpGetHostname(con->http, NULL, 0)); | |
294 | } | |
295 | else | |
296 | #endif /* AF_LOCAL */ | |
297 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Accepted from %s:%d (IPv%d)", | |
298 | httpGetHostname(con->http, NULL, 0), | |
299 | httpAddrPort(httpGetAddress(con->http)), | |
300 | httpAddrFamily(httpGetAddress(con->http)) == AF_INET ? 4 : 6); | |
301 | ||
302 | /* | |
303 | * Get the local address the client connected to... | |
304 | */ | |
305 | ||
306 | addrlen = sizeof(temp); | |
307 | if (getsockname(httpGetFd(con->http), (struct sockaddr *)&temp, &addrlen)) | |
308 | { | |
309 | cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to get local address - %s", | |
310 | strerror(errno)); | |
311 | ||
312 | strlcpy(con->servername, "localhost", sizeof(con->servername)); | |
313 | con->serverport = LocalPort; | |
314 | } | |
315 | #ifdef AF_LOCAL | |
316 | else if (httpAddrFamily(&temp) == AF_LOCAL) | |
317 | { | |
318 | strlcpy(con->servername, "localhost", sizeof(con->servername)); | |
319 | con->serverport = LocalPort; | |
320 | } | |
321 | #endif /* AF_LOCAL */ | |
322 | else | |
323 | { | |
324 | if (httpAddrLocalhost(&temp)) | |
325 | strlcpy(con->servername, "localhost", sizeof(con->servername)); | |
326 | else if (HostNameLookups) | |
327 | httpAddrLookup(&temp, con->servername, sizeof(con->servername)); | |
328 | else | |
329 | httpAddrString(&temp, con->servername, sizeof(con->servername)); | |
330 | ||
331 | con->serverport = httpAddrPort(&(lis->address)); | |
332 | } | |
333 | ||
334 | /* | |
335 | * Add the connection to the array of active clients... | |
336 | */ | |
337 | ||
338 | cupsArrayAdd(Clients, con); | |
339 | ||
340 | /* | |
341 | * Add the socket to the server select. | |
342 | */ | |
343 | ||
344 | cupsdAddSelect(httpGetFd(con->http), (cupsd_selfunc_t)cupsdReadClient, NULL, | |
345 | con); | |
346 | ||
347 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for request."); | |
348 | ||
349 | /* | |
350 | * Temporarily suspend accept()'s until we lose a client... | |
351 | */ | |
352 | ||
353 | if (cupsArrayCount(Clients) == MaxClients) | |
354 | cupsdPauseListening(); | |
355 | ||
356 | #ifdef HAVE_SSL | |
357 | /* | |
358 | * See if we are connecting on a secure port... | |
359 | */ | |
360 | ||
361 | if (lis->encryption == HTTP_ENCRYPTION_ALWAYS) | |
362 | { | |
363 | /* | |
364 | * https connection; go secure... | |
365 | */ | |
366 | ||
367 | if (cupsd_start_tls(con, HTTP_ENCRYPTION_ALWAYS)) | |
368 | cupsdCloseClient(con); | |
369 | } | |
370 | else | |
371 | con->auto_ssl = 1; | |
372 | #endif /* HAVE_SSL */ | |
373 | } | |
374 | ||
375 | ||
376 | /* | |
377 | * 'cupsdCloseAllClients()' - Close all remote clients immediately. | |
378 | */ | |
379 | ||
380 | void | |
381 | cupsdCloseAllClients(void) | |
382 | { | |
383 | cupsd_client_t *con; /* Current client */ | |
384 | ||
385 | ||
386 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCloseAllClients() Clients=%d", cupsArrayCount(Clients)); | |
387 | ||
388 | for (con = (cupsd_client_t *)cupsArrayFirst(Clients); | |
389 | con; | |
390 | con = (cupsd_client_t *)cupsArrayNext(Clients)) | |
391 | if (cupsdCloseClient(con)) | |
392 | cupsdCloseClient(con); | |
393 | } | |
394 | ||
395 | ||
396 | /* | |
397 | * 'cupsdCloseClient()' - Close a remote client. | |
398 | */ | |
399 | ||
400 | int /* O - 1 if partial close, 0 if fully closed */ | |
401 | cupsdCloseClient(cupsd_client_t *con) /* I - Client to close */ | |
402 | { | |
403 | int partial; /* Do partial close for SSL? */ | |
404 | ||
405 | ||
406 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing connection."); | |
407 | ||
408 | /* | |
409 | * Flush pending writes before closing... | |
410 | */ | |
411 | ||
412 | httpFlushWrite(con->http); | |
413 | ||
414 | partial = 0; | |
415 | ||
416 | if (con->pipe_pid != 0) | |
417 | { | |
418 | /* | |
419 | * Stop any CGI process... | |
420 | */ | |
421 | ||
422 | cupsdEndProcess(con->pipe_pid, 1); | |
423 | con->pipe_pid = 0; | |
424 | } | |
425 | ||
426 | if (con->file >= 0) | |
427 | { | |
428 | cupsdRemoveSelect(con->file); | |
429 | ||
430 | close(con->file); | |
431 | con->file = -1; | |
432 | } | |
433 | ||
434 | /* | |
435 | * Close the socket and clear the file from the input set for select()... | |
436 | */ | |
437 | ||
438 | if (httpGetFd(con->http) >= 0) | |
439 | { | |
440 | cupsArrayRemove(ActiveClients, con); | |
441 | cupsdSetBusyState(0); | |
442 | ||
443 | #ifdef HAVE_SSL | |
444 | /* | |
445 | * Shutdown encryption as needed... | |
446 | */ | |
447 | ||
448 | if (httpIsEncrypted(con->http)) | |
449 | partial = 1; | |
450 | #endif /* HAVE_SSL */ | |
451 | ||
452 | if (partial) | |
453 | { | |
454 | /* | |
455 | * Only do a partial close so that the encrypted client gets everything. | |
456 | */ | |
457 | ||
458 | httpShutdown(con->http); | |
459 | cupsdAddSelect(httpGetFd(con->http), (cupsd_selfunc_t)cupsdReadClient, | |
460 | NULL, con); | |
461 | ||
462 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for socket close."); | |
463 | } | |
464 | else | |
465 | { | |
466 | /* | |
467 | * Shut the socket down fully... | |
468 | */ | |
469 | ||
470 | cupsdRemoveSelect(httpGetFd(con->http)); | |
471 | httpClose(con->http); | |
472 | con->http = NULL; | |
473 | } | |
474 | } | |
475 | ||
476 | if (!partial) | |
477 | { | |
478 | /* | |
479 | * Free memory... | |
480 | */ | |
481 | ||
482 | cupsdRemoveSelect(httpGetFd(con->http)); | |
483 | ||
484 | httpClose(con->http); | |
485 | ||
486 | if (con->filename) | |
487 | { | |
488 | unlink(con->filename); | |
489 | cupsdClearString(&con->filename); | |
490 | } | |
491 | ||
492 | cupsdClearString(&con->command); | |
493 | cupsdClearString(&con->options); | |
494 | cupsdClearString(&con->query_string); | |
495 | ||
496 | if (con->request) | |
497 | { | |
498 | ippDelete(con->request); | |
499 | con->request = NULL; | |
500 | } | |
501 | ||
502 | if (con->response) | |
503 | { | |
504 | ippDelete(con->response); | |
505 | con->response = NULL; | |
506 | } | |
507 | ||
508 | if (con->language) | |
509 | { | |
510 | cupsLangFree(con->language); | |
511 | con->language = NULL; | |
512 | } | |
513 | ||
514 | #ifdef HAVE_AUTHORIZATION_H | |
515 | if (con->authref) | |
516 | { | |
517 | AuthorizationFree(con->authref, kAuthorizationFlagDefaults); | |
518 | con->authref = NULL; | |
519 | } | |
520 | #endif /* HAVE_AUTHORIZATION_H */ | |
521 | ||
522 | /* | |
523 | * Re-enable new client connections if we are going back under the | |
524 | * limit... | |
525 | */ | |
526 | ||
527 | if (cupsArrayCount(Clients) == MaxClients) | |
528 | cupsdResumeListening(); | |
529 | ||
530 | /* | |
531 | * Compact the list of clients as necessary... | |
532 | */ | |
533 | ||
534 | cupsArrayRemove(Clients, con); | |
535 | ||
536 | free(con); | |
537 | } | |
538 | ||
539 | return (partial); | |
540 | } | |
541 | ||
542 | ||
543 | /* | |
544 | * 'cupsdReadClient()' - Read data from a client. | |
545 | */ | |
546 | ||
547 | void | |
548 | cupsdReadClient(cupsd_client_t *con) /* I - Client to read from */ | |
549 | { | |
550 | char line[32768], /* Line from client... */ | |
551 | locale[64], /* Locale */ | |
552 | *ptr; /* Pointer into strings */ | |
553 | http_status_t status; /* Transfer status */ | |
554 | ipp_state_t ipp_state; /* State of IPP transfer */ | |
555 | int bytes; /* Number of bytes to POST */ | |
556 | char *filename; /* Name of file for GET/HEAD */ | |
557 | char buf[1024]; /* Buffer for real filename */ | |
558 | struct stat filestats; /* File information */ | |
559 | mime_type_t *type; /* MIME type of file */ | |
560 | static unsigned request_id = 0; /* Request ID for temp files */ | |
561 | ||
562 | ||
563 | status = HTTP_STATUS_CONTINUE; | |
564 | ||
565 | cupsdLogClient(con, CUPSD_LOG_DEBUG2, "cupsdReadClient: error=%d, used=%d, state=%s, data_encoding=HTTP_ENCODING_%s, data_remaining=" CUPS_LLFMT ", request=%p(%s), file=%d", httpError(con->http), (int)httpGetReady(con->http), httpStateString(httpGetState(con->http)), httpIsChunked(con->http) ? "CHUNKED" : "LENGTH", CUPS_LLCAST httpGetRemaining(con->http), con->request, con->request ? ippStateString(ippGetState(con->request)) : "", con->file); | |
566 | ||
567 | if (httpError(con->http) == EPIPE && !httpGetReady(con->http) && recv(httpGetFd(con->http), buf, 1, MSG_PEEK) < 1) | |
568 | { | |
569 | /* | |
570 | * Connection closed... | |
571 | */ | |
572 | ||
573 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing on EOF."); | |
574 | cupsdCloseClient(con); | |
575 | return; | |
576 | } | |
577 | ||
578 | if (httpGetState(con->http) == HTTP_STATE_GET_SEND || | |
579 | httpGetState(con->http) == HTTP_STATE_POST_SEND || | |
580 | httpGetState(con->http) == HTTP_STATE_STATUS) | |
581 | { | |
582 | /* | |
583 | * If we get called in the wrong state, then something went wrong with the | |
584 | * connection and we need to shut it down... | |
585 | */ | |
586 | ||
587 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing on unexpected HTTP read state %s.", httpStateString(httpGetState(con->http))); | |
588 | cupsdCloseClient(con); | |
589 | return; | |
590 | } | |
591 | ||
592 | #ifdef HAVE_SSL | |
593 | if (con->auto_ssl) | |
594 | { | |
595 | /* | |
596 | * Automatically check for a SSL/TLS handshake... | |
597 | */ | |
598 | ||
599 | con->auto_ssl = 0; | |
600 | ||
601 | if (recv(httpGetFd(con->http), buf, 1, MSG_PEEK) == 1 && | |
602 | (!buf[0] || !strchr("DGHOPT", buf[0]))) | |
603 | { | |
604 | /* | |
605 | * Encrypt this connection... | |
606 | */ | |
607 | ||
608 | cupsdLogClient(con, CUPSD_LOG_DEBUG2, "Saw first byte %02X, auto-negotiating SSL/TLS session.", buf[0] & 255); | |
609 | ||
610 | if (cupsd_start_tls(con, HTTP_ENCRYPTION_ALWAYS)) | |
611 | cupsdCloseClient(con); | |
612 | ||
613 | return; | |
614 | } | |
615 | } | |
616 | #endif /* HAVE_SSL */ | |
617 | ||
618 | switch (httpGetState(con->http)) | |
619 | { | |
620 | case HTTP_STATE_WAITING : | |
621 | /* | |
622 | * See if we've received a request line... | |
623 | */ | |
624 | ||
625 | con->operation = httpReadRequest(con->http, con->uri, sizeof(con->uri)); | |
626 | if (con->operation == HTTP_STATE_ERROR || | |
627 | con->operation == HTTP_STATE_UNKNOWN_METHOD || | |
628 | con->operation == HTTP_STATE_UNKNOWN_VERSION) | |
629 | { | |
630 | if (httpError(con->http)) | |
631 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
632 | "HTTP_STATE_WAITING Closing for error %d (%s)", | |
633 | httpError(con->http), strerror(httpError(con->http))); | |
634 | else | |
635 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
636 | "HTTP_STATE_WAITING Closing on error: %s", | |
637 | cupsLastErrorString()); | |
638 | ||
639 | cupsdCloseClient(con); | |
640 | return; | |
641 | } | |
642 | ||
643 | /* | |
644 | * Ignore blank request lines... | |
645 | */ | |
646 | ||
647 | if (con->operation == HTTP_STATE_WAITING) | |
648 | break; | |
649 | ||
650 | /* | |
651 | * Clear other state variables... | |
652 | */ | |
653 | ||
654 | con->bytes = 0; | |
655 | con->file = -1; | |
656 | con->file_ready = 0; | |
657 | con->pipe_pid = 0; | |
658 | con->username[0] = '\0'; | |
659 | con->password[0] = '\0'; | |
660 | ||
661 | cupsdClearString(&con->command); | |
662 | cupsdClearString(&con->options); | |
663 | cupsdClearString(&con->query_string); | |
664 | ||
665 | if (con->request) | |
666 | { | |
667 | ippDelete(con->request); | |
668 | con->request = NULL; | |
669 | } | |
670 | ||
671 | if (con->response) | |
672 | { | |
673 | ippDelete(con->response); | |
674 | con->response = NULL; | |
675 | } | |
676 | ||
677 | if (con->language) | |
678 | { | |
679 | cupsLangFree(con->language); | |
680 | con->language = NULL; | |
681 | } | |
682 | ||
683 | #ifdef HAVE_GSSAPI | |
684 | con->have_gss = 0; | |
685 | con->gss_uid = 0; | |
686 | #endif /* HAVE_GSSAPI */ | |
687 | ||
688 | /* | |
689 | * Handle full URLs in the request line... | |
690 | */ | |
691 | ||
692 | if (strcmp(con->uri, "*")) | |
693 | { | |
694 | char scheme[HTTP_MAX_URI], /* Method/scheme */ | |
695 | userpass[HTTP_MAX_URI], /* Username:password */ | |
696 | hostname[HTTP_MAX_URI], /* Hostname */ | |
697 | resource[HTTP_MAX_URI]; /* Resource path */ | |
698 | int port; /* Port number */ | |
699 | ||
700 | /* | |
701 | * Separate the URI into its components... | |
702 | */ | |
703 | ||
704 | if (httpSeparateURI(HTTP_URI_CODING_MOST, con->uri, | |
705 | scheme, sizeof(scheme), | |
706 | userpass, sizeof(userpass), | |
707 | hostname, sizeof(hostname), &port, | |
708 | resource, sizeof(resource)) < HTTP_URI_STATUS_OK) | |
709 | { | |
710 | cupsdLogClient(con, CUPSD_LOG_ERROR, "Bad URI \"%s\" in request.", | |
711 | con->uri); | |
712 | cupsdSendError(con, HTTP_STATUS_METHOD_NOT_ALLOWED, CUPSD_AUTH_NONE); | |
713 | cupsdCloseClient(con); | |
714 | return; | |
715 | } | |
716 | ||
717 | /* | |
718 | * Only allow URIs with the servername, localhost, or an IP | |
719 | * address... | |
720 | */ | |
721 | ||
722 | if (strcmp(scheme, "file") && | |
723 | _cups_strcasecmp(hostname, ServerName) && | |
724 | _cups_strcasecmp(hostname, "localhost") && | |
725 | !cupsArrayFind(ServerAlias, hostname) && | |
726 | !isdigit(hostname[0]) && hostname[0] != '[') | |
727 | { | |
728 | /* | |
729 | * Nope, we don't do proxies... | |
730 | */ | |
731 | ||
732 | cupsdLogClient(con, CUPSD_LOG_ERROR, "Bad URI \"%s\" in request.", | |
733 | con->uri); | |
734 | cupsdSendError(con, HTTP_STATUS_METHOD_NOT_ALLOWED, CUPSD_AUTH_NONE); | |
735 | cupsdCloseClient(con); | |
736 | return; | |
737 | } | |
738 | ||
739 | /* | |
740 | * Copy the resource portion back into the URI; both resource and | |
741 | * con->uri are HTTP_MAX_URI bytes in size... | |
742 | */ | |
743 | ||
744 | strlcpy(con->uri, resource, sizeof(con->uri)); | |
745 | } | |
746 | ||
747 | /* | |
748 | * Process the request... | |
749 | */ | |
750 | ||
751 | gettimeofday(&(con->start), NULL); | |
752 | ||
753 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "%s %s HTTP/%d.%d", | |
754 | httpStateString(con->operation) + 11, con->uri, | |
755 | httpGetVersion(con->http) / 100, | |
756 | httpGetVersion(con->http) % 100); | |
757 | ||
758 | if (!cupsArrayFind(ActiveClients, con)) | |
759 | { | |
760 | cupsArrayAdd(ActiveClients, con); | |
761 | cupsdSetBusyState(0); | |
762 | } | |
763 | ||
764 | case HTTP_STATE_OPTIONS : | |
765 | case HTTP_STATE_DELETE : | |
766 | case HTTP_STATE_GET : | |
767 | case HTTP_STATE_HEAD : | |
768 | case HTTP_STATE_POST : | |
769 | case HTTP_STATE_PUT : | |
770 | case HTTP_STATE_TRACE : | |
771 | /* | |
772 | * Parse incoming parameters until the status changes... | |
773 | */ | |
774 | ||
775 | while ((status = httpUpdate(con->http)) == HTTP_STATUS_CONTINUE) | |
776 | if (!httpGetReady(con->http)) | |
777 | break; | |
778 | ||
779 | if (status != HTTP_STATUS_OK && status != HTTP_STATUS_CONTINUE) | |
780 | { | |
781 | if (httpError(con->http) && httpError(con->http) != EPIPE) | |
782 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
783 | "Closing for error %d (%s) while reading headers.", | |
784 | httpError(con->http), strerror(httpError(con->http))); | |
785 | else | |
786 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
787 | "Closing on EOF while reading headers."); | |
788 | ||
789 | cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE); | |
790 | cupsdCloseClient(con); | |
791 | return; | |
792 | } | |
793 | break; | |
794 | ||
795 | default : | |
796 | if (!httpGetReady(con->http) && recv(httpGetFd(con->http), buf, 1, MSG_PEEK) < 1) | |
797 | { | |
798 | /* | |
799 | * Connection closed... | |
800 | */ | |
801 | ||
802 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing on EOF."); | |
803 | cupsdCloseClient(con); | |
804 | return; | |
805 | } | |
806 | break; /* Anti-compiler-warning-code */ | |
807 | } | |
808 | ||
809 | /* | |
810 | * Handle new transfers... | |
811 | */ | |
812 | ||
813 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Read: status=%d, state=%d", status, httpGetState(con->http)); | |
814 | ||
815 | if (status == HTTP_STATUS_OK) | |
816 | { | |
817 | /* | |
818 | * Record whether the client is a web browser. "Mozilla" was the original | |
819 | * and it seems that every web browser in existence now uses that as the | |
820 | * prefix with additional information identifying *which* browser. | |
821 | * | |
822 | * Chrome (at least) has problems with multiple WWW-Authenticate values in | |
823 | * a single header, so we only report Basic or Negotiate to web browsers and | |
824 | * leave the multiple choices to the native CUPS client... | |
825 | */ | |
826 | ||
827 | con->is_browser = !strncmp(httpGetField(con->http, HTTP_FIELD_USER_AGENT), "Mozilla/", 8); | |
828 | ||
829 | if (httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE)[0]) | |
830 | { | |
831 | /* | |
832 | * Figure out the locale from the Accept-Language and Content-Type | |
833 | * fields... | |
834 | */ | |
835 | ||
836 | if ((ptr = strchr(httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE), | |
837 | ',')) != NULL) | |
838 | *ptr = '\0'; | |
839 | ||
840 | if ((ptr = strchr(httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE), | |
841 | ';')) != NULL) | |
842 | *ptr = '\0'; | |
843 | ||
844 | if ((ptr = strstr(httpGetField(con->http, HTTP_FIELD_CONTENT_TYPE), | |
845 | "charset=")) != NULL) | |
846 | { | |
847 | /* | |
848 | * Combine language and charset, and trim any extra params in the | |
849 | * content-type. | |
850 | */ | |
851 | ||
852 | snprintf(locale, sizeof(locale), "%s.%s", | |
853 | httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE), ptr + 8); | |
854 | ||
855 | if ((ptr = strchr(locale, ',')) != NULL) | |
856 | *ptr = '\0'; | |
857 | } | |
858 | else | |
859 | snprintf(locale, sizeof(locale), "%s.UTF-8", | |
860 | httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE)); | |
861 | ||
862 | con->language = cupsLangGet(locale); | |
863 | } | |
864 | else | |
865 | con->language = cupsLangGet(DefaultLocale); | |
866 | ||
867 | cupsdAuthorize(con); | |
868 | ||
869 | if (!_cups_strncasecmp(httpGetField(con->http, HTTP_FIELD_CONNECTION), | |
870 | "Keep-Alive", 10) && KeepAlive) | |
871 | httpSetKeepAlive(con->http, HTTP_KEEPALIVE_ON); | |
872 | else if (!_cups_strncasecmp(httpGetField(con->http, HTTP_FIELD_CONNECTION), | |
873 | "close", 5)) | |
874 | httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF); | |
875 | ||
876 | if (!httpGetField(con->http, HTTP_FIELD_HOST)[0] && | |
877 | httpGetVersion(con->http) >= HTTP_VERSION_1_1) | |
878 | { | |
879 | /* | |
880 | * HTTP/1.1 and higher require the "Host:" field... | |
881 | */ | |
882 | ||
883 | if (!cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE)) | |
884 | { | |
885 | cupsdLogClient(con, CUPSD_LOG_ERROR, "Missing Host: field in request."); | |
886 | cupsdCloseClient(con); | |
887 | return; | |
888 | } | |
889 | } | |
890 | else if (!valid_host(con)) | |
891 | { | |
892 | /* | |
893 | * Access to localhost must use "localhost" or the corresponding IPv4 | |
894 | * or IPv6 values in the Host: field. | |
895 | */ | |
896 | ||
897 | cupsdLogClient(con, CUPSD_LOG_ERROR, | |
898 | "Request from \"%s\" using invalid Host: field \"%s\".", | |
899 | httpGetHostname(con->http, NULL, 0), httpGetField(con->http, HTTP_FIELD_HOST)); | |
900 | ||
901 | if (!cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE)) | |
902 | { | |
903 | cupsdCloseClient(con); | |
904 | return; | |
905 | } | |
906 | } | |
907 | else if (con->operation == HTTP_STATE_OPTIONS) | |
908 | { | |
909 | /* | |
910 | * Do OPTIONS command... | |
911 | */ | |
912 | ||
913 | if (con->best && con->best->type != CUPSD_AUTH_NONE) | |
914 | { | |
915 | httpClearFields(con->http); | |
916 | ||
917 | if (!cupsdSendHeader(con, HTTP_STATUS_UNAUTHORIZED, NULL, CUPSD_AUTH_NONE)) | |
918 | { | |
919 | cupsdCloseClient(con); | |
920 | return; | |
921 | } | |
922 | } | |
923 | ||
924 | if (!_cups_strcasecmp(httpGetField(con->http, HTTP_FIELD_CONNECTION), "Upgrade") && strstr(httpGetField(con->http, HTTP_FIELD_UPGRADE), "TLS/") != NULL && !httpIsEncrypted(con->http)) | |
925 | { | |
926 | #ifdef HAVE_SSL | |
927 | /* | |
928 | * Do encryption stuff... | |
929 | */ | |
930 | ||
931 | httpClearFields(con->http); | |
932 | ||
933 | if (!cupsdSendHeader(con, HTTP_STATUS_SWITCHING_PROTOCOLS, NULL, CUPSD_AUTH_NONE)) | |
934 | { | |
935 | cupsdCloseClient(con); | |
936 | return; | |
937 | } | |
938 | ||
939 | if (cupsd_start_tls(con, HTTP_ENCRYPTION_REQUIRED)) | |
940 | { | |
941 | cupsdCloseClient(con); | |
942 | return; | |
943 | } | |
944 | #else | |
945 | if (!cupsdSendError(con, HTTP_STATUS_NOT_IMPLEMENTED, CUPSD_AUTH_NONE)) | |
946 | { | |
947 | cupsdCloseClient(con); | |
948 | return; | |
949 | } | |
950 | #endif /* HAVE_SSL */ | |
951 | } | |
952 | ||
953 | httpClearFields(con->http); | |
954 | httpSetField(con->http, HTTP_FIELD_CONTENT_LENGTH, "0"); | |
955 | ||
956 | if (!cupsdSendHeader(con, HTTP_STATUS_OK, NULL, CUPSD_AUTH_NONE)) | |
957 | { | |
958 | cupsdCloseClient(con); | |
959 | return; | |
960 | } | |
961 | } | |
962 | else if (!is_path_absolute(con->uri)) | |
963 | { | |
964 | /* | |
965 | * Protect against malicious users! | |
966 | */ | |
967 | ||
968 | cupsdLogClient(con, CUPSD_LOG_ERROR, | |
969 | "Request for non-absolute resource \"%s\".", con->uri); | |
970 | ||
971 | if (!cupsdSendError(con, HTTP_STATUS_FORBIDDEN, CUPSD_AUTH_NONE)) | |
972 | { | |
973 | cupsdCloseClient(con); | |
974 | return; | |
975 | } | |
976 | } | |
977 | else | |
978 | { | |
979 | if (!_cups_strcasecmp(httpGetField(con->http, HTTP_FIELD_CONNECTION), | |
980 | "Upgrade") && !httpIsEncrypted(con->http)) | |
981 | { | |
982 | #ifdef HAVE_SSL | |
983 | /* | |
984 | * Do encryption stuff... | |
985 | */ | |
986 | ||
987 | httpClearFields(con->http); | |
988 | ||
989 | if (!cupsdSendHeader(con, HTTP_STATUS_SWITCHING_PROTOCOLS, NULL, | |
990 | CUPSD_AUTH_NONE)) | |
991 | { | |
992 | cupsdCloseClient(con); | |
993 | return; | |
994 | } | |
995 | ||
996 | if (cupsd_start_tls(con, HTTP_ENCRYPTION_REQUIRED)) | |
997 | { | |
998 | cupsdCloseClient(con); | |
999 | return; | |
1000 | } | |
1001 | #else | |
1002 | if (!cupsdSendError(con, HTTP_STATUS_NOT_IMPLEMENTED, CUPSD_AUTH_NONE)) | |
1003 | { | |
1004 | cupsdCloseClient(con); | |
1005 | return; | |
1006 | } | |
1007 | #endif /* HAVE_SSL */ | |
1008 | } | |
1009 | ||
1010 | if ((status = cupsdIsAuthorized(con, NULL)) != HTTP_STATUS_OK) | |
1011 | { | |
1012 | cupsdSendError(con, status, CUPSD_AUTH_NONE); | |
1013 | cupsdCloseClient(con); | |
1014 | return; | |
1015 | } | |
1016 | ||
1017 | if (httpGetExpect(con->http) && | |
1018 | (con->operation == HTTP_STATE_POST || con->operation == HTTP_STATE_PUT)) | |
1019 | { | |
1020 | if (httpGetExpect(con->http) == HTTP_STATUS_CONTINUE) | |
1021 | { | |
1022 | /* | |
1023 | * Send 100-continue header... | |
1024 | */ | |
1025 | ||
1026 | if (httpWriteResponse(con->http, HTTP_STATUS_CONTINUE)) | |
1027 | { | |
1028 | cupsdCloseClient(con); | |
1029 | return; | |
1030 | } | |
1031 | } | |
1032 | else | |
1033 | { | |
1034 | /* | |
1035 | * Send 417-expectation-failed header... | |
1036 | */ | |
1037 | ||
1038 | httpClearFields(con->http); | |
1039 | httpSetField(con->http, HTTP_FIELD_CONTENT_LENGTH, "0"); | |
1040 | ||
1041 | cupsdSendError(con, HTTP_STATUS_EXPECTATION_FAILED, CUPSD_AUTH_NONE); | |
1042 | cupsdCloseClient(con); | |
1043 | return; | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | switch (httpGetState(con->http)) | |
1048 | { | |
1049 | case HTTP_STATE_GET_SEND : | |
1050 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Processing GET %s", con->uri); | |
1051 | ||
1052 | if ((filename = get_file(con, &filestats, buf, sizeof(buf))) != NULL) | |
1053 | { | |
1054 | type = mimeFileType(MimeDatabase, filename, NULL, NULL); | |
1055 | ||
1056 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "filename=\"%s\", type=%s/%s", filename, type ? type->super : "", type ? type->type : ""); | |
1057 | ||
1058 | if (is_cgi(con, filename, &filestats, type)) | |
1059 | { | |
1060 | /* | |
1061 | * Note: con->command and con->options were set by is_cgi()... | |
1062 | */ | |
1063 | ||
1064 | if (!cupsdSendCommand(con, con->command, con->options, 0)) | |
1065 | { | |
1066 | if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE)) | |
1067 | { | |
1068 | cupsdCloseClient(con); | |
1069 | return; | |
1070 | } | |
1071 | } | |
1072 | else | |
1073 | cupsdLogRequest(con, HTTP_STATUS_OK); | |
1074 | ||
1075 | if (httpGetVersion(con->http) <= HTTP_VERSION_1_0) | |
1076 | httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF); | |
1077 | break; | |
1078 | } | |
1079 | ||
1080 | if (!check_if_modified(con, &filestats)) | |
1081 | { | |
1082 | if (!cupsdSendError(con, HTTP_STATUS_NOT_MODIFIED, CUPSD_AUTH_NONE)) | |
1083 | { | |
1084 | cupsdCloseClient(con); | |
1085 | return; | |
1086 | } | |
1087 | } | |
1088 | else | |
1089 | { | |
1090 | if (type == NULL) | |
1091 | strlcpy(line, "text/plain", sizeof(line)); | |
1092 | else | |
1093 | snprintf(line, sizeof(line), "%s/%s", type->super, type->type); | |
1094 | ||
1095 | if (!write_file(con, HTTP_STATUS_OK, filename, line, &filestats)) | |
1096 | { | |
1097 | cupsdCloseClient(con); | |
1098 | return; | |
1099 | } | |
1100 | } | |
1101 | } | |
1102 | else if (!buf[0] && (!strncmp(con->uri, "/admin", 6) || !strncmp(con->uri, "/classes", 8) || !strncmp(con->uri, "/help", 5) || !strncmp(con->uri, "/jobs", 5) || !strncmp(con->uri, "/printers", 9))) | |
1103 | { | |
1104 | if (!WebInterface) | |
1105 | { | |
1106 | /* | |
1107 | * Web interface is disabled. Show an appropriate message... | |
1108 | */ | |
1109 | ||
1110 | if (!cupsdSendError(con, HTTP_STATUS_CUPS_WEBIF_DISABLED, CUPSD_AUTH_NONE)) | |
1111 | { | |
1112 | cupsdCloseClient(con); | |
1113 | return; | |
1114 | } | |
1115 | ||
1116 | break; | |
1117 | } | |
1118 | ||
1119 | /* | |
1120 | * Send CGI output... | |
1121 | */ | |
1122 | ||
1123 | if (!strncmp(con->uri, "/admin", 6)) | |
1124 | { | |
1125 | cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi", ServerBin); | |
1126 | cupsdSetString(&con->options, strchr(con->uri + 6, '?')); | |
1127 | } | |
1128 | else if (!strncmp(con->uri, "/classes", 8)) | |
1129 | { | |
1130 | cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi", ServerBin); | |
1131 | if (con->uri[8] && con->uri[9]) | |
1132 | cupsdSetString(&con->options, con->uri + 8); | |
1133 | else | |
1134 | cupsdSetString(&con->options, NULL); | |
1135 | } | |
1136 | else if (!strncmp(con->uri, "/jobs", 5)) | |
1137 | { | |
1138 | cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi", ServerBin); | |
1139 | if (con->uri[5] && con->uri[6]) | |
1140 | cupsdSetString(&con->options, con->uri + 5); | |
1141 | else | |
1142 | cupsdSetString(&con->options, NULL); | |
1143 | } | |
1144 | else if (!strncmp(con->uri, "/printers", 9)) | |
1145 | { | |
1146 | cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi", ServerBin); | |
1147 | if (con->uri[9] && con->uri[10]) | |
1148 | cupsdSetString(&con->options, con->uri + 9); | |
1149 | else | |
1150 | cupsdSetString(&con->options, NULL); | |
1151 | } | |
1152 | else | |
1153 | { | |
1154 | cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi", ServerBin); | |
1155 | if (con->uri[5] && con->uri[6]) | |
1156 | cupsdSetString(&con->options, con->uri + 5); | |
1157 | else | |
1158 | cupsdSetString(&con->options, NULL); | |
1159 | } | |
1160 | ||
1161 | if (!cupsdSendCommand(con, con->command, con->options, 0)) | |
1162 | { | |
1163 | if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE)) | |
1164 | { | |
1165 | cupsdCloseClient(con); | |
1166 | return; | |
1167 | } | |
1168 | } | |
1169 | else | |
1170 | cupsdLogRequest(con, HTTP_STATUS_OK); | |
1171 | ||
1172 | if (httpGetVersion(con->http) <= HTTP_VERSION_1_0) | |
1173 | httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF); | |
1174 | } | |
1175 | else | |
1176 | { | |
1177 | if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE)) | |
1178 | { | |
1179 | cupsdCloseClient(con); | |
1180 | return; | |
1181 | } | |
1182 | } | |
1183 | break; | |
1184 | ||
1185 | case HTTP_STATE_POST_RECV : | |
1186 | /* | |
1187 | * See if the POST request includes a Content-Length field, and if | |
1188 | * so check the length against any limits that are set... | |
1189 | */ | |
1190 | ||
1191 | if (httpGetField(con->http, HTTP_FIELD_CONTENT_LENGTH)[0] && MaxRequestSize > 0 && httpGetLength2(con->http) > MaxRequestSize) | |
1192 | { | |
1193 | /* | |
1194 | * Request too large... | |
1195 | */ | |
1196 | ||
1197 | if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) | |
1198 | { | |
1199 | cupsdCloseClient(con); | |
1200 | return; | |
1201 | } | |
1202 | ||
1203 | break; | |
1204 | } | |
1205 | else if (httpGetLength2(con->http) < 0) | |
1206 | { | |
1207 | /* | |
1208 | * Negative content lengths are invalid! | |
1209 | */ | |
1210 | ||
1211 | if (!cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE)) | |
1212 | { | |
1213 | cupsdCloseClient(con); | |
1214 | return; | |
1215 | } | |
1216 | ||
1217 | break; | |
1218 | } | |
1219 | ||
1220 | /* | |
1221 | * See what kind of POST request this is; for IPP requests the | |
1222 | * content-type field will be "application/ipp"... | |
1223 | */ | |
1224 | ||
1225 | if (!strcmp(httpGetField(con->http, HTTP_FIELD_CONTENT_TYPE), "application/ipp")) | |
1226 | { | |
1227 | con->request = ippNew(); | |
1228 | break; | |
1229 | } | |
1230 | else if (!WebInterface) | |
1231 | { | |
1232 | /* | |
1233 | * Web interface is disabled. Show an appropriate message... | |
1234 | */ | |
1235 | ||
1236 | if (!cupsdSendError(con, HTTP_STATUS_CUPS_WEBIF_DISABLED, CUPSD_AUTH_NONE)) | |
1237 | { | |
1238 | cupsdCloseClient(con); | |
1239 | return; | |
1240 | } | |
1241 | ||
1242 | break; | |
1243 | } | |
1244 | ||
1245 | if ((filename = get_file(con, &filestats, buf, sizeof(buf))) != NULL) | |
1246 | { | |
1247 | /* | |
1248 | * POST to a file... | |
1249 | */ | |
1250 | ||
1251 | type = mimeFileType(MimeDatabase, filename, NULL, NULL); | |
1252 | ||
1253 | if (!is_cgi(con, filename, &filestats, type)) | |
1254 | { | |
1255 | /* | |
1256 | * Only POST to CGI's... | |
1257 | */ | |
1258 | ||
1259 | if (!cupsdSendError(con, HTTP_STATUS_UNAUTHORIZED, CUPSD_AUTH_NONE)) | |
1260 | { | |
1261 | cupsdCloseClient(con); | |
1262 | return; | |
1263 | } | |
1264 | } | |
1265 | } | |
1266 | else if (!strncmp(con->uri, "/admin", 6) || !strncmp(con->uri, "/printers", 9) || !strncmp(con->uri, "/classes", 8) || !strncmp(con->uri, "/help", 5) || !strncmp(con->uri, "/jobs", 5)) | |
1267 | { | |
1268 | /* | |
1269 | * CGI request... | |
1270 | */ | |
1271 | ||
1272 | if (!strncmp(con->uri, "/admin", 6)) | |
1273 | { | |
1274 | cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi", ServerBin); | |
1275 | cupsdSetString(&con->options, strchr(con->uri + 6, '?')); | |
1276 | } | |
1277 | else if (!strncmp(con->uri, "/printers", 9)) | |
1278 | { | |
1279 | cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi", ServerBin); | |
1280 | if (con->uri[9] && con->uri[10]) | |
1281 | cupsdSetString(&con->options, con->uri + 9); | |
1282 | else | |
1283 | cupsdSetString(&con->options, NULL); | |
1284 | } | |
1285 | else if (!strncmp(con->uri, "/classes", 8)) | |
1286 | { | |
1287 | cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi", ServerBin); | |
1288 | if (con->uri[8] && con->uri[9]) | |
1289 | cupsdSetString(&con->options, con->uri + 8); | |
1290 | else | |
1291 | cupsdSetString(&con->options, NULL); | |
1292 | } | |
1293 | else if (!strncmp(con->uri, "/jobs", 5)) | |
1294 | { | |
1295 | cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi", ServerBin); | |
1296 | if (con->uri[5] && con->uri[6]) | |
1297 | cupsdSetString(&con->options, con->uri + 5); | |
1298 | else | |
1299 | cupsdSetString(&con->options, NULL); | |
1300 | } | |
1301 | else | |
1302 | { | |
1303 | cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi", ServerBin); | |
1304 | if (con->uri[5] && con->uri[6]) | |
1305 | cupsdSetString(&con->options, con->uri + 5); | |
1306 | else | |
1307 | cupsdSetString(&con->options, NULL); | |
1308 | } | |
1309 | ||
1310 | if (httpGetVersion(con->http) <= HTTP_VERSION_1_0) | |
1311 | httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF); | |
1312 | } | |
1313 | else | |
1314 | { | |
1315 | if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE)) | |
1316 | { | |
1317 | cupsdCloseClient(con); | |
1318 | return; | |
1319 | } | |
1320 | } | |
1321 | break; | |
1322 | ||
1323 | case HTTP_STATE_PUT_RECV : | |
1324 | /* | |
1325 | * Validate the resource name... | |
1326 | */ | |
1327 | ||
1328 | if (strcmp(con->uri, "/admin/conf/cupsd.conf")) | |
1329 | { | |
1330 | /* | |
1331 | * PUT can only be done to the cupsd.conf file... | |
1332 | */ | |
1333 | ||
1334 | cupsdLogClient(con, CUPSD_LOG_ERROR, "Disallowed PUT request for \"%s\".", con->uri); | |
1335 | ||
1336 | if (!cupsdSendError(con, HTTP_STATUS_FORBIDDEN, CUPSD_AUTH_NONE)) | |
1337 | { | |
1338 | cupsdCloseClient(con); | |
1339 | return; | |
1340 | } | |
1341 | ||
1342 | break; | |
1343 | } | |
1344 | ||
1345 | /* | |
1346 | * See if the PUT request includes a Content-Length field, and if | |
1347 | * so check the length against any limits that are set... | |
1348 | */ | |
1349 | ||
1350 | if (httpGetField(con->http, HTTP_FIELD_CONTENT_LENGTH)[0] && MaxRequestSize > 0 && httpGetLength2(con->http) > MaxRequestSize) | |
1351 | { | |
1352 | /* | |
1353 | * Request too large... | |
1354 | */ | |
1355 | ||
1356 | if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) | |
1357 | { | |
1358 | cupsdCloseClient(con); | |
1359 | return; | |
1360 | } | |
1361 | ||
1362 | break; | |
1363 | } | |
1364 | else if (httpGetLength2(con->http) < 0) | |
1365 | { | |
1366 | /* | |
1367 | * Negative content lengths are invalid! | |
1368 | */ | |
1369 | ||
1370 | if (!cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE)) | |
1371 | { | |
1372 | cupsdCloseClient(con); | |
1373 | return; | |
1374 | } | |
1375 | ||
1376 | break; | |
1377 | } | |
1378 | ||
1379 | /* | |
1380 | * Open a temporary file to hold the request... | |
1381 | */ | |
1382 | ||
1383 | cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot, request_id ++); | |
1384 | con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640); | |
1385 | ||
1386 | if (con->file < 0) | |
1387 | { | |
1388 | cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to create request file \"%s\": %s", con->filename, strerror(errno)); | |
1389 | ||
1390 | if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) | |
1391 | { | |
1392 | cupsdCloseClient(con); | |
1393 | return; | |
1394 | } | |
1395 | } | |
1396 | ||
1397 | fchmod(con->file, 0640); | |
1398 | fchown(con->file, RunUser, Group); | |
1399 | fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC); | |
1400 | break; | |
1401 | ||
1402 | case HTTP_STATE_DELETE : | |
1403 | case HTTP_STATE_TRACE : | |
1404 | cupsdSendError(con, HTTP_STATUS_NOT_IMPLEMENTED, CUPSD_AUTH_NONE); | |
1405 | cupsdCloseClient(con); | |
1406 | return; | |
1407 | ||
1408 | case HTTP_STATE_HEAD : | |
1409 | if ((filename = get_file(con, &filestats, buf, sizeof(buf))) != NULL) | |
1410 | { | |
1411 | if (!check_if_modified(con, &filestats)) | |
1412 | { | |
1413 | if (!cupsdSendError(con, HTTP_STATUS_NOT_MODIFIED, CUPSD_AUTH_NONE)) | |
1414 | { | |
1415 | cupsdCloseClient(con); | |
1416 | return; | |
1417 | } | |
1418 | ||
1419 | cupsdLogRequest(con, HTTP_STATUS_NOT_MODIFIED); | |
1420 | } | |
1421 | else | |
1422 | { | |
1423 | /* | |
1424 | * Serve a file... | |
1425 | */ | |
1426 | ||
1427 | type = mimeFileType(MimeDatabase, filename, NULL, NULL); | |
1428 | if (type == NULL) | |
1429 | strlcpy(line, "text/plain", sizeof(line)); | |
1430 | else | |
1431 | snprintf(line, sizeof(line), "%s/%s", type->super, type->type); | |
1432 | ||
1433 | httpClearFields(con->http); | |
1434 | ||
1435 | httpSetField(con->http, HTTP_FIELD_LAST_MODIFIED, httpGetDateString(filestats.st_mtime)); | |
1436 | httpSetLength(con->http, (size_t)filestats.st_size); | |
1437 | ||
1438 | if (!cupsdSendHeader(con, HTTP_STATUS_OK, line, CUPSD_AUTH_NONE)) | |
1439 | { | |
1440 | cupsdCloseClient(con); | |
1441 | return; | |
1442 | } | |
1443 | ||
1444 | cupsdLogRequest(con, HTTP_STATUS_OK); | |
1445 | } | |
1446 | } | |
1447 | else if (!WebInterface) | |
1448 | { | |
1449 | httpClearFields(con->http); | |
1450 | ||
1451 | if (!cupsdSendHeader(con, HTTP_STATUS_OK, NULL, CUPSD_AUTH_NONE)) | |
1452 | { | |
1453 | cupsdCloseClient(con); | |
1454 | return; | |
1455 | } | |
1456 | ||
1457 | cupsdLogRequest(con, HTTP_STATUS_OK); | |
1458 | break; | |
1459 | } | |
1460 | ||
1461 | if (!buf[0] && (!strncmp(con->uri, "/admin", 6) || !strncmp(con->uri, "/classes", 8) || !strncmp(con->uri, "/help", 5) || !strncmp(con->uri, "/jobs", 5) || !strncmp(con->uri, "/printers", 9))) | |
1462 | { | |
1463 | /* | |
1464 | * CGI output... | |
1465 | */ | |
1466 | ||
1467 | httpClearFields(con->http); | |
1468 | ||
1469 | if (!cupsdSendHeader(con, HTTP_STATUS_OK, "text/html", CUPSD_AUTH_NONE)) | |
1470 | { | |
1471 | cupsdCloseClient(con); | |
1472 | return; | |
1473 | } | |
1474 | ||
1475 | cupsdLogRequest(con, HTTP_STATUS_OK); | |
1476 | } | |
1477 | else | |
1478 | { | |
1479 | httpClearFields(con->http); | |
1480 | ||
1481 | if (!cupsdSendHeader(con, HTTP_STATUS_NOT_FOUND, "text/html", CUPSD_AUTH_NONE)) | |
1482 | { | |
1483 | cupsdCloseClient(con); | |
1484 | return; | |
1485 | } | |
1486 | ||
1487 | cupsdLogRequest(con, HTTP_STATUS_NOT_FOUND); | |
1488 | } | |
1489 | break; | |
1490 | ||
1491 | default : | |
1492 | break; /* Anti-compiler-warning-code */ | |
1493 | } | |
1494 | } | |
1495 | } | |
1496 | ||
1497 | /* | |
1498 | * Handle any incoming data... | |
1499 | */ | |
1500 | ||
1501 | switch (httpGetState(con->http)) | |
1502 | { | |
1503 | case HTTP_STATE_PUT_RECV : | |
1504 | do | |
1505 | { | |
1506 | if ((bytes = httpRead2(con->http, line, sizeof(line))) < 0) | |
1507 | { | |
1508 | if (httpError(con->http) && httpError(con->http) != EPIPE) | |
1509 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
1510 | "HTTP_STATE_PUT_RECV Closing for error %d (%s)", | |
1511 | httpError(con->http), strerror(httpError(con->http))); | |
1512 | else | |
1513 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
1514 | "HTTP_STATE_PUT_RECV Closing on EOF."); | |
1515 | ||
1516 | cupsdCloseClient(con); | |
1517 | return; | |
1518 | } | |
1519 | else if (bytes > 0) | |
1520 | { | |
1521 | con->bytes += bytes; | |
1522 | ||
1523 | if (MaxRequestSize > 0 && con->bytes > MaxRequestSize) | |
1524 | { | |
1525 | close(con->file); | |
1526 | con->file = -1; | |
1527 | unlink(con->filename); | |
1528 | cupsdClearString(&con->filename); | |
1529 | ||
1530 | if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) | |
1531 | { | |
1532 | cupsdCloseClient(con); | |
1533 | return; | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | if (write(con->file, line, (size_t)bytes) < bytes) | |
1538 | { | |
1539 | cupsdLogClient(con, CUPSD_LOG_ERROR, | |
1540 | "Unable to write %d bytes to \"%s\": %s", bytes, | |
1541 | con->filename, strerror(errno)); | |
1542 | ||
1543 | close(con->file); | |
1544 | con->file = -1; | |
1545 | unlink(con->filename); | |
1546 | cupsdClearString(&con->filename); | |
1547 | ||
1548 | if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) | |
1549 | { | |
1550 | cupsdCloseClient(con); | |
1551 | return; | |
1552 | } | |
1553 | } | |
1554 | } | |
1555 | else if (httpGetState(con->http) == HTTP_STATE_PUT_RECV) | |
1556 | { | |
1557 | cupsdCloseClient(con); | |
1558 | return; | |
1559 | } | |
1560 | } | |
1561 | while (httpGetState(con->http) == HTTP_STATE_PUT_RECV && httpGetReady(con->http)); | |
1562 | ||
1563 | if (httpGetState(con->http) == HTTP_STATE_STATUS) | |
1564 | { | |
1565 | /* | |
1566 | * End of file, see how big it is... | |
1567 | */ | |
1568 | ||
1569 | fstat(con->file, &filestats); | |
1570 | ||
1571 | close(con->file); | |
1572 | con->file = -1; | |
1573 | ||
1574 | if (filestats.st_size > MaxRequestSize && | |
1575 | MaxRequestSize > 0) | |
1576 | { | |
1577 | /* | |
1578 | * Request is too big; remove it and send an error... | |
1579 | */ | |
1580 | ||
1581 | unlink(con->filename); | |
1582 | cupsdClearString(&con->filename); | |
1583 | ||
1584 | if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) | |
1585 | { | |
1586 | cupsdCloseClient(con); | |
1587 | return; | |
1588 | } | |
1589 | } | |
1590 | ||
1591 | /* | |
1592 | * Install the configuration file... | |
1593 | */ | |
1594 | ||
1595 | status = install_cupsd_conf(con); | |
1596 | ||
1597 | /* | |
1598 | * Return the status to the client... | |
1599 | */ | |
1600 | ||
1601 | if (!cupsdSendError(con, status, CUPSD_AUTH_NONE)) | |
1602 | { | |
1603 | cupsdCloseClient(con); | |
1604 | return; | |
1605 | } | |
1606 | } | |
1607 | break; | |
1608 | ||
1609 | case HTTP_STATE_POST_RECV : | |
1610 | do | |
1611 | { | |
1612 | if (con->request && con->file < 0) | |
1613 | { | |
1614 | /* | |
1615 | * Grab any request data from the connection... | |
1616 | */ | |
1617 | ||
1618 | if (!httpWait(con->http, 0)) | |
1619 | return; | |
1620 | ||
1621 | if ((ipp_state = ippRead(con->http, con->request)) == IPP_STATE_ERROR) | |
1622 | { | |
1623 | cupsdLogClient(con, CUPSD_LOG_ERROR, "IPP read error: %s", | |
1624 | cupsLastErrorString()); | |
1625 | ||
1626 | cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE); | |
1627 | cupsdCloseClient(con); | |
1628 | return; | |
1629 | } | |
1630 | else if (ipp_state != IPP_STATE_DATA) | |
1631 | { | |
1632 | if (httpGetState(con->http) == HTTP_STATE_POST_SEND) | |
1633 | { | |
1634 | cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE); | |
1635 | cupsdCloseClient(con); | |
1636 | return; | |
1637 | } | |
1638 | ||
1639 | if (httpGetReady(con->http)) | |
1640 | continue; | |
1641 | break; | |
1642 | } | |
1643 | else | |
1644 | { | |
1645 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "%d.%d %s %d", | |
1646 | con->request->request.op.version[0], | |
1647 | con->request->request.op.version[1], | |
1648 | ippOpString(con->request->request.op.operation_id), | |
1649 | con->request->request.op.request_id); | |
1650 | con->bytes += (off_t)ippLength(con->request); | |
1651 | } | |
1652 | } | |
1653 | ||
1654 | if (con->file < 0 && httpGetState(con->http) != HTTP_STATE_POST_SEND) | |
1655 | { | |
1656 | /* | |
1657 | * Create a file as needed for the request data... | |
1658 | */ | |
1659 | ||
1660 | cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot, | |
1661 | request_id ++); | |
1662 | con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640); | |
1663 | ||
1664 | if (con->file < 0) | |
1665 | { | |
1666 | cupsdLogClient(con, CUPSD_LOG_ERROR, | |
1667 | "Unable to create request file \"%s\": %s", | |
1668 | con->filename, strerror(errno)); | |
1669 | ||
1670 | if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) | |
1671 | { | |
1672 | cupsdCloseClient(con); | |
1673 | return; | |
1674 | } | |
1675 | } | |
1676 | ||
1677 | fchmod(con->file, 0640); | |
1678 | fchown(con->file, RunUser, Group); | |
1679 | fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC); | |
1680 | } | |
1681 | ||
1682 | if (httpGetState(con->http) != HTTP_STATE_POST_SEND) | |
1683 | { | |
1684 | if (!httpWait(con->http, 0)) | |
1685 | return; | |
1686 | else if ((bytes = httpRead2(con->http, line, sizeof(line))) < 0) | |
1687 | { | |
1688 | if (httpError(con->http) && httpError(con->http) != EPIPE) | |
1689 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
1690 | "HTTP_STATE_POST_SEND Closing for error %d (%s)", | |
1691 | httpError(con->http), strerror(httpError(con->http))); | |
1692 | else | |
1693 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
1694 | "HTTP_STATE_POST_SEND Closing on EOF."); | |
1695 | ||
1696 | cupsdCloseClient(con); | |
1697 | return; | |
1698 | } | |
1699 | else if (bytes > 0) | |
1700 | { | |
1701 | con->bytes += bytes; | |
1702 | ||
1703 | if (MaxRequestSize > 0 && con->bytes > MaxRequestSize) | |
1704 | { | |
1705 | close(con->file); | |
1706 | con->file = -1; | |
1707 | unlink(con->filename); | |
1708 | cupsdClearString(&con->filename); | |
1709 | ||
1710 | if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) | |
1711 | { | |
1712 | cupsdCloseClient(con); | |
1713 | return; | |
1714 | } | |
1715 | } | |
1716 | ||
1717 | if (write(con->file, line, (size_t)bytes) < bytes) | |
1718 | { | |
1719 | cupsdLogClient(con, CUPSD_LOG_ERROR, | |
1720 | "Unable to write %d bytes to \"%s\": %s", | |
1721 | bytes, con->filename, strerror(errno)); | |
1722 | ||
1723 | close(con->file); | |
1724 | con->file = -1; | |
1725 | unlink(con->filename); | |
1726 | cupsdClearString(&con->filename); | |
1727 | ||
1728 | if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, | |
1729 | CUPSD_AUTH_NONE)) | |
1730 | { | |
1731 | cupsdCloseClient(con); | |
1732 | return; | |
1733 | } | |
1734 | } | |
1735 | } | |
1736 | else if (httpGetState(con->http) == HTTP_STATE_POST_RECV) | |
1737 | return; | |
1738 | else if (httpGetState(con->http) != HTTP_STATE_POST_SEND) | |
1739 | { | |
1740 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
1741 | "Closing on unexpected state %s.", | |
1742 | httpStateString(httpGetState(con->http))); | |
1743 | cupsdCloseClient(con); | |
1744 | return; | |
1745 | } | |
1746 | } | |
1747 | } | |
1748 | while (httpGetState(con->http) == HTTP_STATE_POST_RECV && httpGetReady(con->http)); | |
1749 | ||
1750 | if (httpGetState(con->http) == HTTP_STATE_POST_SEND) | |
1751 | { | |
1752 | if (con->file >= 0) | |
1753 | { | |
1754 | fstat(con->file, &filestats); | |
1755 | ||
1756 | close(con->file); | |
1757 | con->file = -1; | |
1758 | ||
1759 | if (filestats.st_size > MaxRequestSize && | |
1760 | MaxRequestSize > 0) | |
1761 | { | |
1762 | /* | |
1763 | * Request is too big; remove it and send an error... | |
1764 | */ | |
1765 | ||
1766 | unlink(con->filename); | |
1767 | cupsdClearString(&con->filename); | |
1768 | ||
1769 | if (con->request) | |
1770 | { | |
1771 | /* | |
1772 | * Delete any IPP request data... | |
1773 | */ | |
1774 | ||
1775 | ippDelete(con->request); | |
1776 | con->request = NULL; | |
1777 | } | |
1778 | ||
1779 | if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) | |
1780 | { | |
1781 | cupsdCloseClient(con); | |
1782 | return; | |
1783 | } | |
1784 | } | |
1785 | else if (filestats.st_size == 0) | |
1786 | { | |
1787 | /* | |
1788 | * Don't allow empty file... | |
1789 | */ | |
1790 | ||
1791 | unlink(con->filename); | |
1792 | cupsdClearString(&con->filename); | |
1793 | } | |
1794 | ||
1795 | if (con->command) | |
1796 | { | |
1797 | if (!cupsdSendCommand(con, con->command, con->options, 0)) | |
1798 | { | |
1799 | if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE)) | |
1800 | { | |
1801 | cupsdCloseClient(con); | |
1802 | return; | |
1803 | } | |
1804 | } | |
1805 | else | |
1806 | cupsdLogRequest(con, HTTP_STATUS_OK); | |
1807 | } | |
1808 | } | |
1809 | ||
1810 | if (con->request) | |
1811 | { | |
1812 | cupsdProcessIPPRequest(con); | |
1813 | ||
1814 | if (con->filename) | |
1815 | { | |
1816 | unlink(con->filename); | |
1817 | cupsdClearString(&con->filename); | |
1818 | } | |
1819 | ||
1820 | return; | |
1821 | } | |
1822 | } | |
1823 | break; | |
1824 | ||
1825 | default : | |
1826 | break; /* Anti-compiler-warning-code */ | |
1827 | } | |
1828 | ||
1829 | if (httpGetState(con->http) == HTTP_STATE_WAITING) | |
1830 | { | |
1831 | if (!httpGetKeepAlive(con->http)) | |
1832 | { | |
1833 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
1834 | "Closing because Keep-Alive is disabled."); | |
1835 | cupsdCloseClient(con); | |
1836 | } | |
1837 | else | |
1838 | { | |
1839 | cupsArrayRemove(ActiveClients, con); | |
1840 | cupsdSetBusyState(0); | |
1841 | } | |
1842 | } | |
1843 | } | |
1844 | ||
1845 | ||
1846 | /* | |
1847 | * 'cupsdSendCommand()' - Send output from a command via HTTP. | |
1848 | */ | |
1849 | ||
1850 | int /* O - 1 on success, 0 on failure */ | |
1851 | cupsdSendCommand( | |
1852 | cupsd_client_t *con, /* I - Client connection */ | |
1853 | char *command, /* I - Command to run */ | |
1854 | char *options, /* I - Command-line options */ | |
1855 | int root) /* I - Run as root? */ | |
1856 | { | |
1857 | int fd; /* Standard input file descriptor */ | |
1858 | ||
1859 | ||
1860 | if (con->filename) | |
1861 | { | |
1862 | fd = open(con->filename, O_RDONLY); | |
1863 | ||
1864 | if (fd < 0) | |
1865 | { | |
1866 | cupsdLogClient(con, CUPSD_LOG_ERROR, | |
1867 | "Unable to open \"%s\" for reading: %s", | |
1868 | con->filename ? con->filename : "/dev/null", | |
1869 | strerror(errno)); | |
1870 | return (0); | |
1871 | } | |
1872 | ||
1873 | fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); | |
1874 | } | |
1875 | else | |
1876 | fd = -1; | |
1877 | ||
1878 | con->pipe_pid = pipe_command(con, fd, &(con->file), command, options, root); | |
1879 | con->pipe_status = HTTP_STATUS_OK; | |
1880 | ||
1881 | httpClearFields(con->http); | |
1882 | ||
1883 | if (fd >= 0) | |
1884 | close(fd); | |
1885 | ||
1886 | cupsdLogClient(con, CUPSD_LOG_INFO, "Started \"%s\" (pid=%d, file=%d)", | |
1887 | command, con->pipe_pid, con->file); | |
1888 | ||
1889 | if (con->pipe_pid == 0) | |
1890 | return (0); | |
1891 | ||
1892 | fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC); | |
1893 | ||
1894 | cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con); | |
1895 | ||
1896 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for CGI data."); | |
1897 | ||
1898 | con->sent_header = 0; | |
1899 | con->file_ready = 0; | |
1900 | con->got_fields = 0; | |
1901 | con->header_used = 0; | |
1902 | ||
1903 | return (1); | |
1904 | } | |
1905 | ||
1906 | ||
1907 | /* | |
1908 | * 'cupsdSendError()' - Send an error message via HTTP. | |
1909 | */ | |
1910 | ||
1911 | int /* O - 1 if successful, 0 otherwise */ | |
1912 | cupsdSendError(cupsd_client_t *con, /* I - Connection */ | |
1913 | http_status_t code, /* I - Error code */ | |
1914 | int auth_type)/* I - Authentication type */ | |
1915 | { | |
1916 | char location[HTTP_MAX_VALUE]; /* Location field */ | |
1917 | ||
1918 | ||
1919 | cupsdLogClient(con, CUPSD_LOG_DEBUG2, "cupsdSendError code=%d, auth_type=%d", code, auth_type); | |
1920 | ||
1921 | #ifdef HAVE_SSL | |
1922 | /* | |
1923 | * Force client to upgrade for authentication if that is how the | |
1924 | * server is configured... | |
1925 | */ | |
1926 | ||
1927 | if (code == HTTP_STATUS_UNAUTHORIZED && | |
1928 | DefaultEncryption == HTTP_ENCRYPTION_REQUIRED && | |
1929 | _cups_strcasecmp(httpGetHostname(con->http, NULL, 0), "localhost") && | |
1930 | !httpIsEncrypted(con->http)) | |
1931 | { | |
1932 | code = HTTP_STATUS_UPGRADE_REQUIRED; | |
1933 | } | |
1934 | #endif /* HAVE_SSL */ | |
1935 | ||
1936 | /* | |
1937 | * Put the request in the access_log file... | |
1938 | */ | |
1939 | ||
1940 | cupsdLogRequest(con, code); | |
1941 | ||
1942 | /* | |
1943 | * To work around bugs in some proxies, don't use Keep-Alive for some | |
1944 | * error messages... | |
1945 | * | |
1946 | * Kerberos authentication doesn't work without Keep-Alive, so | |
1947 | * never disable it in that case. | |
1948 | */ | |
1949 | ||
1950 | strlcpy(location, httpGetField(con->http, HTTP_FIELD_LOCATION), sizeof(location)); | |
1951 | ||
1952 | httpClearFields(con->http); | |
1953 | httpClearCookie(con->http); | |
1954 | ||
1955 | httpSetField(con->http, HTTP_FIELD_LOCATION, location); | |
1956 | ||
1957 | if (code >= HTTP_STATUS_BAD_REQUEST && con->type != CUPSD_AUTH_NEGOTIATE) | |
1958 | httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF); | |
1959 | ||
1960 | if (httpGetVersion(con->http) >= HTTP_VERSION_1_1 && | |
1961 | httpGetKeepAlive(con->http) == HTTP_KEEPALIVE_OFF) | |
1962 | httpSetField(con->http, HTTP_FIELD_CONNECTION, "close"); | |
1963 | ||
1964 | if (code >= HTTP_STATUS_BAD_REQUEST) | |
1965 | { | |
1966 | /* | |
1967 | * Send a human-readable error message. | |
1968 | */ | |
1969 | ||
1970 | char message[4096], /* Message for user */ | |
1971 | urltext[1024], /* URL redirection text */ | |
1972 | redirect[1024]; /* Redirection link */ | |
1973 | const char *text; /* Status-specific text */ | |
1974 | ||
1975 | ||
1976 | redirect[0] = '\0'; | |
1977 | ||
1978 | if (code == HTTP_STATUS_UNAUTHORIZED) | |
1979 | { | |
1980 | text = _cupsLangString(con->language, | |
1981 | _("Enter your username and password or the " | |
1982 | "root username and password to access this " | |
1983 | "page. If you are using Kerberos authentication, " | |
1984 | "make sure you have a valid Kerberos ticket.")); | |
1985 | } | |
1986 | else if (code == HTTP_STATUS_FORBIDDEN) | |
1987 | { | |
1988 | if (con->username[0]) | |
1989 | text = _cupsLangString(con->language, _("Your account does not have the necessary privileges.")); | |
1990 | else | |
1991 | text = _cupsLangString(con->language, _("You cannot access this page.")); | |
1992 | } | |
1993 | else if (code == HTTP_STATUS_UPGRADE_REQUIRED) | |
1994 | { | |
1995 | text = urltext; | |
1996 | ||
1997 | snprintf(urltext, sizeof(urltext), _cupsLangString(con->language, _("You must access this page using the URL https://%s:%d%s.")), con->servername, con->serverport, con->uri); | |
1998 | ||
1999 | snprintf(redirect, sizeof(redirect), "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"3;URL=https://%s:%d%s\">\n", con->servername, con->serverport, con->uri); | |
2000 | } | |
2001 | else if (code == HTTP_STATUS_CUPS_WEBIF_DISABLED) | |
2002 | text = _cupsLangString(con->language, | |
2003 | _("The web interface is currently disabled. Run " | |
2004 | "\"cupsctl WebInterface=yes\" to enable it.")); | |
2005 | else | |
2006 | text = ""; | |
2007 | ||
2008 | snprintf(message, sizeof(message), | |
2009 | "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" " | |
2010 | "\"http://www.w3.org/TR/html4/loose.dtd\">\n" | |
2011 | "<HTML>\n" | |
2012 | "<HEAD>\n" | |
2013 | "\t<META HTTP-EQUIV=\"Content-Type\" " | |
2014 | "CONTENT=\"text/html; charset=utf-8\">\n" | |
2015 | "\t<TITLE>%s - " CUPS_SVERSION "</TITLE>\n" | |
2016 | "\t<LINK REL=\"STYLESHEET\" TYPE=\"text/css\" " | |
2017 | "HREF=\"/cups.css\">\n" | |
2018 | "%s" | |
2019 | "</HEAD>\n" | |
2020 | "<BODY>\n" | |
2021 | "<H1>%s</H1>\n" | |
2022 | "<P>%s</P>\n" | |
2023 | "</BODY>\n" | |
2024 | "</HTML>\n", | |
2025 | _httpStatus(con->language, code), redirect, | |
2026 | _httpStatus(con->language, code), text); | |
2027 | ||
2028 | /* | |
2029 | * Send an error message back to the client. If the error code is a | |
2030 | * 400 or 500 series, make sure the message contains some text, too! | |
2031 | */ | |
2032 | ||
2033 | size_t length = strlen(message); /* Length of message */ | |
2034 | ||
2035 | httpSetLength(con->http, length); | |
2036 | ||
2037 | if (!cupsdSendHeader(con, code, "text/html", auth_type)) | |
2038 | return (0); | |
2039 | ||
2040 | if (httpWrite2(con->http, message, length) < 0) | |
2041 | return (0); | |
2042 | ||
2043 | if (httpFlushWrite(con->http) < 0) | |
2044 | return (0); | |
2045 | } | |
2046 | else | |
2047 | { | |
2048 | httpSetField(con->http, HTTP_FIELD_CONTENT_LENGTH, "0"); | |
2049 | ||
2050 | if (!cupsdSendHeader(con, code, NULL, auth_type)) | |
2051 | return (0); | |
2052 | } | |
2053 | ||
2054 | return (1); | |
2055 | } | |
2056 | ||
2057 | ||
2058 | /* | |
2059 | * 'cupsdSendHeader()' - Send an HTTP request. | |
2060 | */ | |
2061 | ||
2062 | int /* O - 1 on success, 0 on failure */ | |
2063 | cupsdSendHeader( | |
2064 | cupsd_client_t *con, /* I - Client to send to */ | |
2065 | http_status_t code, /* I - HTTP status code */ | |
2066 | char *type, /* I - MIME type of document */ | |
2067 | int auth_type) /* I - Type of authentication */ | |
2068 | { | |
2069 | char auth_str[1024]; /* Authorization string */ | |
2070 | ||
2071 | ||
2072 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "cupsdSendHeader: code=%d, type=\"%s\", auth_type=%d", code, type, auth_type); | |
2073 | ||
2074 | /* | |
2075 | * Send the HTTP status header... | |
2076 | */ | |
2077 | ||
2078 | if (code == HTTP_STATUS_CUPS_WEBIF_DISABLED) | |
2079 | { | |
2080 | /* | |
2081 | * Treat our special "web interface is disabled" status as "200 OK" for web | |
2082 | * browsers. | |
2083 | */ | |
2084 | ||
2085 | code = HTTP_STATUS_OK; | |
2086 | } | |
2087 | ||
2088 | if (ServerHeader) | |
2089 | httpSetField(con->http, HTTP_FIELD_SERVER, ServerHeader); | |
2090 | ||
2091 | if (code == HTTP_STATUS_METHOD_NOT_ALLOWED) | |
2092 | httpSetField(con->http, HTTP_FIELD_ALLOW, "GET, HEAD, OPTIONS, POST, PUT"); | |
2093 | ||
2094 | if (code == HTTP_STATUS_UNAUTHORIZED) | |
2095 | { | |
2096 | if (auth_type == CUPSD_AUTH_NONE) | |
2097 | { | |
2098 | if (!con->best || con->best->type <= CUPSD_AUTH_NONE) | |
2099 | auth_type = cupsdDefaultAuthType(); | |
2100 | else | |
2101 | auth_type = con->best->type; | |
2102 | } | |
2103 | ||
2104 | auth_str[0] = '\0'; | |
2105 | ||
2106 | if (auth_type == CUPSD_AUTH_BASIC) | |
2107 | { | |
2108 | strlcpy(auth_str, "Basic realm=\"CUPS\"", sizeof(auth_str)); | |
2109 | } | |
2110 | else if (auth_type == CUPSD_AUTH_NEGOTIATE) | |
2111 | { | |
2112 | #if defined(SO_PEERCRED) && defined(AF_LOCAL) | |
2113 | if (httpAddrFamily(httpGetAddress(con->http)) == AF_LOCAL) | |
2114 | strlcpy(auth_str, "PeerCred", sizeof(auth_str)); | |
2115 | else | |
2116 | #endif /* SO_PEERCRED && AF_LOCAL */ | |
2117 | strlcpy(auth_str, "Negotiate", sizeof(auth_str)); | |
2118 | } | |
2119 | ||
2120 | if (con->best && auth_type != CUPSD_AUTH_NEGOTIATE && !con->is_browser && !_cups_strcasecmp(httpGetHostname(con->http, NULL, 0), "localhost")) | |
2121 | { | |
2122 | /* | |
2123 | * Add a "trc" (try root certification) parameter for local non-Kerberos | |
2124 | * requests when the request requires system group membership - then the | |
2125 | * client knows the root certificate can/should be used. | |
2126 | * | |
2127 | * Also, for macOS we also look for @AUTHKEY and add an "AuthRef key=foo" | |
2128 | * method as needed... | |
2129 | */ | |
2130 | ||
2131 | char *name, /* Current user name */ | |
2132 | *auth_key; /* Auth key buffer */ | |
2133 | size_t auth_size; /* Size of remaining buffer */ | |
2134 | int need_local = 1; /* Do we need to list "Local" method? */ | |
2135 | ||
2136 | auth_key = auth_str + strlen(auth_str); | |
2137 | auth_size = sizeof(auth_str) - (size_t)(auth_key - auth_str); | |
2138 | ||
2139 | #if defined(SO_PEERCRED) && defined(AF_LOCAL) | |
2140 | if (httpAddrFamily(httpGetAddress(con->http)) == AF_LOCAL) | |
2141 | { | |
2142 | strlcpy(auth_key, ", PeerCred", auth_size); | |
2143 | auth_key += 10; | |
2144 | auth_size -= 10; | |
2145 | } | |
2146 | #endif /* SO_PEERCRED && AF_LOCAL */ | |
2147 | ||
2148 | for (name = (char *)cupsArrayFirst(con->best->names); | |
2149 | name; | |
2150 | name = (char *)cupsArrayNext(con->best->names)) | |
2151 | { | |
2152 | cupsdLogClient(con, CUPSD_LOG_DEBUG2, "cupsdSendHeader: require \"%s\"", name); | |
2153 | ||
2154 | #ifdef HAVE_AUTHORIZATION_H | |
2155 | if (!_cups_strncasecmp(name, "@AUTHKEY(", 9)) | |
2156 | { | |
2157 | snprintf(auth_key, auth_size, ", AuthRef key=\"%s\", Local trc=\"y\"", name + 9); | |
2158 | need_local = 0; | |
2159 | /* end parenthesis is stripped in conf.c */ | |
2160 | break; | |
2161 | } | |
2162 | else | |
2163 | #endif /* HAVE_AUTHORIZATION_H */ | |
2164 | if (!_cups_strcasecmp(name, "@SYSTEM")) | |
2165 | { | |
2166 | #ifdef HAVE_AUTHORIZATION_H | |
2167 | if (SystemGroupAuthKey) | |
2168 | snprintf(auth_key, auth_size, ", AuthRef key=\"%s\", Local trc=\"y\"", SystemGroupAuthKey); | |
2169 | else | |
2170 | #endif /* HAVE_AUTHORIZATION_H */ | |
2171 | strlcpy(auth_key, ", Local trc=\"y\"", auth_size); | |
2172 | need_local = 0; | |
2173 | break; | |
2174 | } | |
2175 | } | |
2176 | ||
2177 | if (need_local) | |
2178 | strlcat(auth_key, ", Local", auth_size); | |
2179 | } | |
2180 | ||
2181 | if (auth_str[0]) | |
2182 | { | |
2183 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "WWW-Authenticate: %s", auth_str); | |
2184 | ||
2185 | httpSetField(con->http, HTTP_FIELD_WWW_AUTHENTICATE, auth_str); | |
2186 | } | |
2187 | } | |
2188 | ||
2189 | if (con->language && strcmp(con->language->language, "C")) | |
2190 | httpSetField(con->http, HTTP_FIELD_CONTENT_LANGUAGE, con->language->language); | |
2191 | ||
2192 | if (type) | |
2193 | { | |
2194 | if (!strcmp(type, "text/html")) | |
2195 | httpSetField(con->http, HTTP_FIELD_CONTENT_TYPE, "text/html; charset=utf-8"); | |
2196 | else | |
2197 | httpSetField(con->http, HTTP_FIELD_CONTENT_TYPE, type); | |
2198 | } | |
2199 | ||
2200 | return (!httpWriteResponse(con->http, code)); | |
2201 | } | |
2202 | ||
2203 | ||
2204 | /* | |
2205 | * 'cupsdUpdateCGI()' - Read status messages from CGI scripts and programs. | |
2206 | */ | |
2207 | ||
2208 | void | |
2209 | cupsdUpdateCGI(void) | |
2210 | { | |
2211 | char *ptr, /* Pointer to end of line in buffer */ | |
2212 | message[1024]; /* Pointer to message text */ | |
2213 | int loglevel; /* Log level for message */ | |
2214 | ||
2215 | ||
2216 | while ((ptr = cupsdStatBufUpdate(CGIStatusBuffer, &loglevel, | |
2217 | message, sizeof(message))) != NULL) | |
2218 | { | |
2219 | if (loglevel == CUPSD_LOG_INFO) | |
2220 | cupsdLogMessage(CUPSD_LOG_INFO, "%s", message); | |
2221 | ||
2222 | if (!strchr(CGIStatusBuffer->buffer, '\n')) | |
2223 | break; | |
2224 | } | |
2225 | ||
2226 | if (ptr == NULL && !CGIStatusBuffer->bufused) | |
2227 | { | |
2228 | /* | |
2229 | * Fatal error on pipe - should never happen! | |
2230 | */ | |
2231 | ||
2232 | cupsdLogMessage(CUPSD_LOG_CRIT, | |
2233 | "cupsdUpdateCGI: error reading from CGI error pipe - %s", | |
2234 | strerror(errno)); | |
2235 | } | |
2236 | } | |
2237 | ||
2238 | ||
2239 | /* | |
2240 | * 'cupsdWriteClient()' - Write data to a client as needed. | |
2241 | */ | |
2242 | ||
2243 | void | |
2244 | cupsdWriteClient(cupsd_client_t *con) /* I - Client connection */ | |
2245 | { | |
2246 | int bytes, /* Number of bytes written */ | |
2247 | field_col; /* Current column */ | |
2248 | char *bufptr, /* Pointer into buffer */ | |
2249 | *bufend; /* Pointer to end of buffer */ | |
2250 | ipp_state_t ipp_state; /* IPP state value */ | |
2251 | ||
2252 | ||
2253 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "con->http=%p", con->http); | |
2254 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
2255 | "cupsdWriteClient " | |
2256 | "error=%d, " | |
2257 | "used=%d, " | |
2258 | "state=%s, " | |
2259 | "data_encoding=HTTP_ENCODING_%s, " | |
2260 | "data_remaining=" CUPS_LLFMT ", " | |
2261 | "response=%p(%s), " | |
2262 | "pipe_pid=%d, " | |
2263 | "file=%d", | |
2264 | httpError(con->http), (int)httpGetReady(con->http), | |
2265 | httpStateString(httpGetState(con->http)), | |
2266 | httpIsChunked(con->http) ? "CHUNKED" : "LENGTH", | |
2267 | CUPS_LLCAST httpGetLength2(con->http), | |
2268 | con->response, | |
2269 | con->response ? ippStateString(ippGetState(con->request)) : "", | |
2270 | con->pipe_pid, con->file); | |
2271 | ||
2272 | if (httpGetState(con->http) != HTTP_STATE_GET_SEND && | |
2273 | httpGetState(con->http) != HTTP_STATE_POST_SEND) | |
2274 | { | |
2275 | /* | |
2276 | * If we get called in the wrong state, then something went wrong with the | |
2277 | * connection and we need to shut it down... | |
2278 | */ | |
2279 | ||
2280 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing on unexpected HTTP write state %s.", | |
2281 | httpStateString(httpGetState(con->http))); | |
2282 | cupsdCloseClient(con); | |
2283 | return; | |
2284 | } | |
2285 | ||
2286 | if (con->pipe_pid) | |
2287 | { | |
2288 | /* | |
2289 | * Make sure we select on the CGI output... | |
2290 | */ | |
2291 | ||
2292 | cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con); | |
2293 | ||
2294 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for CGI data."); | |
2295 | ||
2296 | if (!con->file_ready) | |
2297 | { | |
2298 | /* | |
2299 | * Try again later when there is CGI output available... | |
2300 | */ | |
2301 | ||
2302 | cupsdRemoveSelect(httpGetFd(con->http)); | |
2303 | return; | |
2304 | } | |
2305 | ||
2306 | con->file_ready = 0; | |
2307 | } | |
2308 | ||
2309 | bytes = (ssize_t)(sizeof(con->header) - (size_t)con->header_used); | |
2310 | ||
2311 | if (!con->pipe_pid && bytes > (ssize_t)httpGetRemaining(con->http)) | |
2312 | { | |
2313 | /* | |
2314 | * Limit GET bytes to original size of file (STR #3265)... | |
2315 | */ | |
2316 | ||
2317 | bytes = (ssize_t)httpGetRemaining(con->http); | |
2318 | } | |
2319 | ||
2320 | if (con->response && con->response->state != IPP_STATE_DATA) | |
2321 | { | |
2322 | size_t wused = httpGetPending(con->http); /* Previous write buffer use */ | |
2323 | ||
2324 | do | |
2325 | { | |
2326 | /* | |
2327 | * Write a single attribute or the IPP message header... | |
2328 | */ | |
2329 | ||
2330 | ipp_state = ippWrite(con->http, con->response); | |
2331 | ||
2332 | /* | |
2333 | * If the write buffer has been flushed, stop buffering up attributes... | |
2334 | */ | |
2335 | ||
2336 | if (httpGetPending(con->http) <= wused) | |
2337 | break; | |
2338 | } | |
2339 | while (ipp_state != IPP_STATE_DATA && ipp_state != IPP_STATE_ERROR); | |
2340 | ||
2341 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
2342 | "Writing IPP response, ipp_state=%s, old " | |
2343 | "wused=" CUPS_LLFMT ", new wused=" CUPS_LLFMT, | |
2344 | ippStateString(ipp_state), | |
2345 | CUPS_LLCAST wused, CUPS_LLCAST httpGetPending(con->http)); | |
2346 | ||
2347 | if (httpGetPending(con->http) > 0) | |
2348 | httpFlushWrite(con->http); | |
2349 | ||
2350 | bytes = ipp_state != IPP_STATE_ERROR && | |
2351 | (con->file >= 0 || ipp_state != IPP_STATE_DATA); | |
2352 | ||
2353 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
2354 | "bytes=%d, http_state=%d, data_remaining=" CUPS_LLFMT, | |
2355 | (int)bytes, httpGetState(con->http), | |
2356 | CUPS_LLCAST httpGetLength2(con->http)); | |
2357 | } | |
2358 | else if ((bytes = read(con->file, con->header + con->header_used, (size_t)bytes)) > 0) | |
2359 | { | |
2360 | con->header_used += bytes; | |
2361 | ||
2362 | if (con->pipe_pid && !con->got_fields) | |
2363 | { | |
2364 | /* | |
2365 | * Inspect the data for Content-Type and other fields. | |
2366 | */ | |
2367 | ||
2368 | for (bufptr = con->header, bufend = con->header + con->header_used, | |
2369 | field_col = 0; | |
2370 | !con->got_fields && bufptr < bufend; | |
2371 | bufptr ++) | |
2372 | { | |
2373 | if (*bufptr == '\n') | |
2374 | { | |
2375 | /* | |
2376 | * Send line to client... | |
2377 | */ | |
2378 | ||
2379 | if (bufptr > con->header && bufptr[-1] == '\r') | |
2380 | bufptr[-1] = '\0'; | |
2381 | *bufptr++ = '\0'; | |
2382 | ||
2383 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Script header: %s", con->header); | |
2384 | ||
2385 | if (!con->sent_header) | |
2386 | { | |
2387 | /* | |
2388 | * Handle redirection and CGI status codes... | |
2389 | */ | |
2390 | ||
2391 | http_field_t field; /* HTTP field */ | |
2392 | char *value = strchr(con->header, ':'); | |
2393 | /* Value of field */ | |
2394 | ||
2395 | if (value) | |
2396 | { | |
2397 | *value++ = '\0'; | |
2398 | while (isspace(*value & 255)) | |
2399 | value ++; | |
2400 | } | |
2401 | ||
2402 | field = httpFieldValue(con->header); | |
2403 | ||
2404 | if (field != HTTP_FIELD_UNKNOWN && value) | |
2405 | { | |
2406 | httpSetField(con->http, field, value); | |
2407 | ||
2408 | if (field == HTTP_FIELD_LOCATION) | |
2409 | { | |
2410 | con->pipe_status = HTTP_STATUS_SEE_OTHER; | |
2411 | con->sent_header = 2; | |
2412 | } | |
2413 | else | |
2414 | con->sent_header = 1; | |
2415 | } | |
2416 | else if (!_cups_strcasecmp(con->header, "Status") && value) | |
2417 | { | |
2418 | con->pipe_status = (http_status_t)atoi(value); | |
2419 | con->sent_header = 2; | |
2420 | } | |
2421 | else if (!_cups_strcasecmp(con->header, "Set-Cookie") && value) | |
2422 | { | |
2423 | httpSetCookie(con->http, value); | |
2424 | con->sent_header = 1; | |
2425 | } | |
2426 | } | |
2427 | ||
2428 | /* | |
2429 | * Update buffer... | |
2430 | */ | |
2431 | ||
2432 | con->header_used -= bufptr - con->header; | |
2433 | ||
2434 | if (con->header_used > 0) | |
2435 | memmove(con->header, bufptr, (size_t)con->header_used); | |
2436 | ||
2437 | bufptr = con->header - 1; | |
2438 | ||
2439 | /* | |
2440 | * See if the line was empty... | |
2441 | */ | |
2442 | ||
2443 | if (field_col == 0) | |
2444 | { | |
2445 | con->got_fields = 1; | |
2446 | ||
2447 | if (httpGetVersion(con->http) == HTTP_VERSION_1_1 && | |
2448 | !httpGetField(con->http, HTTP_FIELD_CONTENT_LENGTH)[0]) | |
2449 | httpSetLength(con->http, 0); | |
2450 | ||
2451 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Sending status %d for CGI.", con->pipe_status); | |
2452 | ||
2453 | if (con->pipe_status == HTTP_STATUS_OK) | |
2454 | { | |
2455 | if (!cupsdSendHeader(con, con->pipe_status, NULL, CUPSD_AUTH_NONE)) | |
2456 | { | |
2457 | cupsdCloseClient(con); | |
2458 | return; | |
2459 | } | |
2460 | } | |
2461 | else | |
2462 | { | |
2463 | if (!cupsdSendError(con, con->pipe_status, CUPSD_AUTH_NONE)) | |
2464 | { | |
2465 | cupsdCloseClient(con); | |
2466 | return; | |
2467 | } | |
2468 | } | |
2469 | } | |
2470 | else | |
2471 | field_col = 0; | |
2472 | } | |
2473 | else if (*bufptr != '\r') | |
2474 | field_col ++; | |
2475 | } | |
2476 | ||
2477 | if (!con->got_fields) | |
2478 | return; | |
2479 | } | |
2480 | ||
2481 | if (con->header_used > 0) | |
2482 | { | |
2483 | if (httpWrite2(con->http, con->header, (size_t)con->header_used) < 0) | |
2484 | { | |
2485 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing for error %d (%s)", | |
2486 | httpError(con->http), strerror(httpError(con->http))); | |
2487 | cupsdCloseClient(con); | |
2488 | return; | |
2489 | } | |
2490 | ||
2491 | if (httpIsChunked(con->http)) | |
2492 | httpFlushWrite(con->http); | |
2493 | ||
2494 | con->bytes += con->header_used; | |
2495 | ||
2496 | if (httpGetState(con->http) == HTTP_STATE_WAITING) | |
2497 | bytes = 0; | |
2498 | else | |
2499 | bytes = con->header_used; | |
2500 | ||
2501 | con->header_used = 0; | |
2502 | } | |
2503 | } | |
2504 | ||
2505 | if (bytes <= 0 || | |
2506 | (httpGetState(con->http) != HTTP_STATE_GET_SEND && | |
2507 | httpGetState(con->http) != HTTP_STATE_POST_SEND)) | |
2508 | { | |
2509 | if (!con->sent_header && con->pipe_pid) | |
2510 | cupsdSendError(con, HTTP_STATUS_SERVER_ERROR, CUPSD_AUTH_NONE); | |
2511 | else | |
2512 | { | |
2513 | cupsdLogRequest(con, HTTP_STATUS_OK); | |
2514 | ||
2515 | if (httpIsChunked(con->http) && (!con->pipe_pid || con->sent_header > 0)) | |
2516 | { | |
2517 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Sending 0-length chunk."); | |
2518 | ||
2519 | if (httpWrite2(con->http, "", 0) < 0) | |
2520 | { | |
2521 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing for error %d (%s)", | |
2522 | httpError(con->http), strerror(httpError(con->http))); | |
2523 | cupsdCloseClient(con); | |
2524 | return; | |
2525 | } | |
2526 | } | |
2527 | ||
2528 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Flushing write buffer."); | |
2529 | httpFlushWrite(con->http); | |
2530 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "New state is %s", httpStateString(httpGetState(con->http))); | |
2531 | } | |
2532 | ||
2533 | cupsdAddSelect(httpGetFd(con->http), (cupsd_selfunc_t)cupsdReadClient, NULL, con); | |
2534 | ||
2535 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for request."); | |
2536 | ||
2537 | if (con->file >= 0) | |
2538 | { | |
2539 | cupsdRemoveSelect(con->file); | |
2540 | ||
2541 | if (con->pipe_pid) | |
2542 | cupsdEndProcess(con->pipe_pid, 0); | |
2543 | ||
2544 | close(con->file); | |
2545 | con->file = -1; | |
2546 | con->pipe_pid = 0; | |
2547 | } | |
2548 | ||
2549 | if (con->filename) | |
2550 | { | |
2551 | unlink(con->filename); | |
2552 | cupsdClearString(&con->filename); | |
2553 | } | |
2554 | ||
2555 | if (con->request) | |
2556 | { | |
2557 | ippDelete(con->request); | |
2558 | con->request = NULL; | |
2559 | } | |
2560 | ||
2561 | if (con->response) | |
2562 | { | |
2563 | ippDelete(con->response); | |
2564 | con->response = NULL; | |
2565 | } | |
2566 | ||
2567 | cupsdClearString(&con->command); | |
2568 | cupsdClearString(&con->options); | |
2569 | cupsdClearString(&con->query_string); | |
2570 | ||
2571 | if (!httpGetKeepAlive(con->http)) | |
2572 | { | |
2573 | cupsdLogClient(con, CUPSD_LOG_DEBUG, | |
2574 | "Closing because Keep-Alive is disabled."); | |
2575 | cupsdCloseClient(con); | |
2576 | return; | |
2577 | } | |
2578 | else | |
2579 | { | |
2580 | cupsArrayRemove(ActiveClients, con); | |
2581 | cupsdSetBusyState(0); | |
2582 | } | |
2583 | } | |
2584 | } | |
2585 | ||
2586 | ||
2587 | /* | |
2588 | * 'check_if_modified()' - Decode an "If-Modified-Since" line. | |
2589 | */ | |
2590 | ||
2591 | static int /* O - 1 if modified since */ | |
2592 | check_if_modified( | |
2593 | cupsd_client_t *con, /* I - Client connection */ | |
2594 | struct stat *filestats) /* I - File information */ | |
2595 | { | |
2596 | const char *ptr; /* Pointer into field */ | |
2597 | time_t date; /* Time/date value */ | |
2598 | off_t size; /* Size/length value */ | |
2599 | ||
2600 | ||
2601 | size = 0; | |
2602 | date = 0; | |
2603 | ptr = httpGetField(con->http, HTTP_FIELD_IF_MODIFIED_SINCE); | |
2604 | ||
2605 | if (*ptr == '\0') | |
2606 | return (1); | |
2607 | ||
2608 | cupsdLogClient(con, CUPSD_LOG_DEBUG2, "check_if_modified: filestats=%p(" CUPS_LLFMT ", %d)) If-Modified-Since=\"%s\"", filestats, CUPS_LLCAST filestats->st_size, (int)filestats->st_mtime, ptr); | |
2609 | ||
2610 | while (*ptr != '\0') | |
2611 | { | |
2612 | while (isspace(*ptr) || *ptr == ';') | |
2613 | ptr ++; | |
2614 | ||
2615 | if (_cups_strncasecmp(ptr, "length=", 7) == 0) | |
2616 | { | |
2617 | ptr += 7; | |
2618 | size = strtoll(ptr, NULL, 10); | |
2619 | ||
2620 | while (isdigit(*ptr)) | |
2621 | ptr ++; | |
2622 | } | |
2623 | else if (isalpha(*ptr)) | |
2624 | { | |
2625 | date = httpGetDateTime(ptr); | |
2626 | while (*ptr != '\0' && *ptr != ';') | |
2627 | ptr ++; | |
2628 | } | |
2629 | else | |
2630 | ptr ++; | |
2631 | } | |
2632 | ||
2633 | return ((size != filestats->st_size && size != 0) || | |
2634 | (date < filestats->st_mtime && date != 0) || | |
2635 | (size == 0 && date == 0)); | |
2636 | } | |
2637 | ||
2638 | ||
2639 | /* | |
2640 | * 'compare_clients()' - Compare two client connections. | |
2641 | */ | |
2642 | ||
2643 | static int /* O - Result of comparison */ | |
2644 | compare_clients(cupsd_client_t *a, /* I - First client */ | |
2645 | cupsd_client_t *b, /* I - Second client */ | |
2646 | void *data) /* I - User data (not used) */ | |
2647 | { | |
2648 | (void)data; | |
2649 | ||
2650 | if (a == b) | |
2651 | return (0); | |
2652 | else if (a < b) | |
2653 | return (-1); | |
2654 | else | |
2655 | return (1); | |
2656 | } | |
2657 | ||
2658 | ||
2659 | #ifdef HAVE_SSL | |
2660 | /* | |
2661 | * 'cupsd_start_tls()' - Start encryption on a connection. | |
2662 | */ | |
2663 | ||
2664 | static int /* O - 0 on success, -1 on error */ | |
2665 | cupsd_start_tls(cupsd_client_t *con, /* I - Client connection */ | |
2666 | http_encryption_t e) /* I - Encryption mode */ | |
2667 | { | |
2668 | if (httpEncryption(con->http, e)) | |
2669 | { | |
2670 | cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to encrypt connection: %s", | |
2671 | cupsLastErrorString()); | |
2672 | return (-1); | |
2673 | } | |
2674 | ||
2675 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Connection now encrypted."); | |
2676 | return (0); | |
2677 | } | |
2678 | #endif /* HAVE_SSL */ | |
2679 | ||
2680 | ||
2681 | /* | |
2682 | * 'get_file()' - Get a filename and state info. | |
2683 | */ | |
2684 | ||
2685 | static char * /* O - Real filename */ | |
2686 | get_file(cupsd_client_t *con, /* I - Client connection */ | |
2687 | struct stat *filestats, /* O - File information */ | |
2688 | char *filename, /* IO - Filename buffer */ | |
2689 | size_t len) /* I - Buffer length */ | |
2690 | { | |
2691 | int status; /* Status of filesystem calls */ | |
2692 | char *ptr; /* Pointer info filename */ | |
2693 | size_t plen; /* Remaining length after pointer */ | |
2694 | char language[7], /* Language subdirectory, if any */ | |
2695 | dest[1024]; /* Destination name */ | |
2696 | int perm_check = 1; /* Do permissions check? */ | |
2697 | cupsd_printer_t *p; /* Printer */ | |
2698 | ||
2699 | ||
2700 | /* | |
2701 | * Figure out the real filename... | |
2702 | */ | |
2703 | ||
2704 | filename[0] = '\0'; | |
2705 | language[0] = '\0'; | |
2706 | ||
2707 | if (!strncmp(con->uri, "/help", 5) && (con->uri[5] == '/' || !con->uri[5])) | |
2708 | { | |
2709 | /* | |
2710 | * All help files are served by the help.cgi program... | |
2711 | */ | |
2712 | ||
2713 | return (NULL); | |
2714 | } | |
2715 | else if ((!strncmp(con->uri, "/ppd/", 5) || !strncmp(con->uri, "/printers/", 10) || !strncmp(con->uri, "/classes/", 9)) && !strcmp(con->uri + strlen(con->uri) - 4, ".ppd")) | |
2716 | { | |
2717 | strlcpy(dest, strchr(con->uri + 1, '/') + 1, sizeof(dest)); | |
2718 | dest[strlen(dest) - 4] = '\0'; /* Strip .ppd */ | |
2719 | ||
2720 | if ((p = cupsdFindDest(dest)) == NULL) | |
2721 | { | |
2722 | strlcpy(filename, "/", len); | |
2723 | cupsdLogClient(con, CUPSD_LOG_INFO, "No destination \"%s\" found.", dest); | |
2724 | return (NULL); | |
2725 | } | |
2726 | ||
2727 | if (p->type & CUPS_PRINTER_CLASS) | |
2728 | { | |
2729 | int i; /* Looping var */ | |
2730 | ||
2731 | for (i = 0; i < p->num_printers; i ++) | |
2732 | { | |
2733 | if (!(p->printers[i]->type & CUPS_PRINTER_CLASS)) | |
2734 | { | |
2735 | snprintf(filename, len, "%s/ppd/%s.ppd", ServerRoot, p->printers[i]->name); | |
2736 | if (!access(filename, 0)) | |
2737 | { | |
2738 | p = p->printers[i]; | |
2739 | break; | |
2740 | } | |
2741 | } | |
2742 | } | |
2743 | ||
2744 | if (i >= p->num_printers) | |
2745 | p = NULL; | |
2746 | } | |
2747 | else | |
2748 | snprintf(filename, len, "%s/ppd/%s.ppd", ServerRoot, p->name); | |
2749 | ||
2750 | perm_check = 0; | |
2751 | } | |
2752 | else if ((!strncmp(con->uri, "/icons/", 7) || !strncmp(con->uri, "/printers/", 10) || !strncmp(con->uri, "/classes/", 9)) && !strcmp(con->uri + strlen(con->uri) - 4, ".png")) | |
2753 | { | |
2754 | strlcpy(dest, strchr(con->uri + 1, '/') + 1, sizeof(dest)); | |
2755 | dest[strlen(dest) - 4] = '\0'; /* Strip .png */ | |
2756 | ||
2757 | if ((p = cupsdFindDest(dest)) == NULL) | |
2758 | { | |
2759 | strlcpy(filename, "/", len); | |
2760 | cupsdLogClient(con, CUPSD_LOG_INFO, "No destination \"%s\" found.", dest); | |
2761 | return (NULL); | |
2762 | } | |
2763 | ||
2764 | if (p->type & CUPS_PRINTER_CLASS) | |
2765 | { | |
2766 | int i; /* Looping var */ | |
2767 | ||
2768 | for (i = 0; i < p->num_printers; i ++) | |
2769 | { | |
2770 | if (!(p->printers[i]->type & CUPS_PRINTER_CLASS)) | |
2771 | { | |
2772 | snprintf(filename, len, "%s/images/%s.png", CacheDir, p->printers[i]->name); | |
2773 | if (!access(filename, 0)) | |
2774 | { | |
2775 | p = p->printers[i]; | |
2776 | break; | |
2777 | } | |
2778 | } | |
2779 | } | |
2780 | ||
2781 | if (i >= p->num_printers) | |
2782 | p = NULL; | |
2783 | } | |
2784 | else | |
2785 | snprintf(filename, len, "%s/images/%s.png", CacheDir, p->name); | |
2786 | ||
2787 | if (access(filename, F_OK) < 0) | |
2788 | snprintf(filename, len, "%s/images/generic.png", DocumentRoot); | |
2789 | ||
2790 | perm_check = 0; | |
2791 | } | |
2792 | else if (!strncmp(con->uri, "/admin", 6) || !strncmp(con->uri, "/classes", 8) || !strncmp(con->uri, "/jobs", 5) || !strncmp(con->uri, "/printers", 9)) | |
2793 | { | |
2794 | /* | |
2795 | * Admin/class/job/printer pages are served by CGI... | |
2796 | */ | |
2797 | ||
2798 | return (NULL); | |
2799 | } | |
2800 | else if (!strncmp(con->uri, "/rss/", 5) && !strchr(con->uri + 5, '/')) | |
2801 | snprintf(filename, len, "%s/rss/%s", CacheDir, con->uri + 5); | |
2802 | else if (!strncmp(con->uri, "/strings/", 9) && !strcmp(con->uri + strlen(con->uri) - 8, ".strings")) | |
2803 | { | |
2804 | strlcpy(dest, con->uri + 9, sizeof(dest)); | |
2805 | dest[strlen(dest) - 8] = '\0'; | |
2806 | ||
2807 | if ((p = cupsdFindDest(dest)) == NULL) | |
2808 | { | |
2809 | strlcpy(filename, "/", len); | |
2810 | cupsdLogClient(con, CUPSD_LOG_INFO, "No destination \"%s\" found.", dest); | |
2811 | return (NULL); | |
2812 | } | |
2813 | ||
2814 | if (!p->strings) | |
2815 | { | |
2816 | strlcpy(filename, "/", len); | |
2817 | cupsdLogClient(con, CUPSD_LOG_INFO, "No strings files for \"%s\".", dest); | |
2818 | return (NULL); | |
2819 | } | |
2820 | ||
2821 | strlcpy(filename, p->strings, len); | |
2822 | ||
2823 | perm_check = 0; | |
2824 | } | |
2825 | else if (!strcmp(con->uri, "/admin/conf/cupsd.conf")) | |
2826 | { | |
2827 | strlcpy(filename, ConfigurationFile, len); | |
2828 | ||
2829 | perm_check = 0; | |
2830 | } | |
2831 | else if (!strncmp(con->uri, "/admin/log/", 11)) | |
2832 | { | |
2833 | if (!strncmp(con->uri + 11, "access_log", 10) && AccessLog[0] == '/') | |
2834 | strlcpy(filename, AccessLog, len); | |
2835 | else if (!strncmp(con->uri + 11, "error_log", 9) && ErrorLog[0] == '/') | |
2836 | strlcpy(filename, ErrorLog, len); | |
2837 | else if (!strncmp(con->uri + 11, "page_log", 8) && PageLog[0] == '/') | |
2838 | strlcpy(filename, PageLog, len); | |
2839 | else | |
2840 | return (NULL); | |
2841 | ||
2842 | perm_check = 0; | |
2843 | } | |
2844 | else if (con->language) | |
2845 | { | |
2846 | snprintf(language, sizeof(language), "/%s", con->language->language); | |
2847 | snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri); | |
2848 | } | |
2849 | else | |
2850 | snprintf(filename, len, "%s%s", DocumentRoot, con->uri); | |
2851 | ||
2852 | if ((ptr = strchr(filename, '?')) != NULL) | |
2853 | *ptr = '\0'; | |
2854 | ||
2855 | /* | |
2856 | * Grab the status for this language; if there isn't a language-specific file | |
2857 | * then fallback to the default one... | |
2858 | */ | |
2859 | ||
2860 | if ((status = lstat(filename, filestats)) != 0 && language[0] && | |
2861 | strncmp(con->uri, "/icons/", 7) && | |
2862 | strncmp(con->uri, "/ppd/", 5) && | |
2863 | strncmp(con->uri, "/rss/", 5) && | |
2864 | strncmp(con->uri, "/strings/", 9) && | |
2865 | strncmp(con->uri, "/admin/conf/", 12) && | |
2866 | strncmp(con->uri, "/admin/log/", 11)) | |
2867 | { | |
2868 | /* | |
2869 | * Drop the country code... | |
2870 | */ | |
2871 | ||
2872 | language[3] = '\0'; | |
2873 | snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri); | |
2874 | ||
2875 | if ((ptr = strchr(filename, '?')) != NULL) | |
2876 | *ptr = '\0'; | |
2877 | ||
2878 | if ((status = lstat(filename, filestats)) != 0) | |
2879 | { | |
2880 | /* | |
2881 | * Drop the language prefix and try the root directory... | |
2882 | */ | |
2883 | ||
2884 | language[0] = '\0'; | |
2885 | snprintf(filename, len, "%s%s", DocumentRoot, con->uri); | |
2886 | ||
2887 | if ((ptr = strchr(filename, '?')) != NULL) | |
2888 | *ptr = '\0'; | |
2889 | ||
2890 | status = lstat(filename, filestats); | |
2891 | } | |
2892 | } | |
2893 | ||
2894 | /* | |
2895 | * If we've found a symlink, 404 the sucker to avoid disclosing information. | |
2896 | */ | |
2897 | ||
2898 | if (!status && S_ISLNK(filestats->st_mode)) | |
2899 | { | |
2900 | cupsdLogClient(con, CUPSD_LOG_INFO, "Symlinks such as \"%s\" are not allowed.", filename); | |
2901 | return (NULL); | |
2902 | } | |
2903 | ||
2904 | /* | |
2905 | * Similarly, if the file/directory does not have world read permissions, do | |
2906 | * not allow access... | |
2907 | */ | |
2908 | ||
2909 | if (!status && perm_check && !(filestats->st_mode & S_IROTH)) | |
2910 | { | |
2911 | cupsdLogClient(con, CUPSD_LOG_INFO, "Files/directories such as \"%s\" must be world-readable.", filename); | |
2912 | return (NULL); | |
2913 | } | |
2914 | ||
2915 | /* | |
2916 | * If we've found a directory, get the index.html file instead... | |
2917 | */ | |
2918 | ||
2919 | if (!status && S_ISDIR(filestats->st_mode)) | |
2920 | { | |
2921 | /* | |
2922 | * Make sure the URI ends with a slash... | |
2923 | */ | |
2924 | ||
2925 | if (con->uri[strlen(con->uri) - 1] != '/') | |
2926 | strlcat(con->uri, "/", sizeof(con->uri)); | |
2927 | ||
2928 | /* | |
2929 | * Find the directory index file, trying every language... | |
2930 | */ | |
2931 | ||
2932 | do | |
2933 | { | |
2934 | if (status && language[0]) | |
2935 | { | |
2936 | /* | |
2937 | * Try a different language subset... | |
2938 | */ | |
2939 | ||
2940 | if (language[3]) | |
2941 | language[0] = '\0'; /* Strip country code */ | |
2942 | else | |
2943 | language[0] = '\0'; /* Strip language */ | |
2944 | } | |
2945 | ||
2946 | /* | |
2947 | * Look for the index file... | |
2948 | */ | |
2949 | ||
2950 | snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri); | |
2951 | ||
2952 | if ((ptr = strchr(filename, '?')) != NULL) | |
2953 | *ptr = '\0'; | |
2954 | ||
2955 | ptr = filename + strlen(filename); | |
2956 | plen = len - (size_t)(ptr - filename); | |
2957 | ||
2958 | strlcpy(ptr, "index.html", plen); | |
2959 | status = lstat(filename, filestats); | |
2960 | } | |
2961 | while (status && language[0]); | |
2962 | ||
2963 | /* | |
2964 | * If we've found a symlink, 404 the sucker to avoid disclosing information. | |
2965 | */ | |
2966 | ||
2967 | if (!status && S_ISLNK(filestats->st_mode)) | |
2968 | { | |
2969 | cupsdLogClient(con, CUPSD_LOG_INFO, "Symlinks such as \"%s\" are not allowed.", filename); | |
2970 | return (NULL); | |
2971 | } | |
2972 | ||
2973 | /* | |
2974 | * Similarly, if the file/directory does not have world read permissions, do | |
2975 | * not allow access... | |
2976 | */ | |
2977 | ||
2978 | if (!status && perm_check && !(filestats->st_mode & S_IROTH)) | |
2979 | { | |
2980 | cupsdLogClient(con, CUPSD_LOG_INFO, "Files/directories such as \"%s\" must be world-readable.", filename); | |
2981 | return (NULL); | |
2982 | } | |
2983 | } | |
2984 | ||
2985 | cupsdLogClient(con, CUPSD_LOG_DEBUG2, "get_file: filestats=%p, filename=%p, len=" CUPS_LLFMT ", returning \"%s\".", filestats, filename, CUPS_LLCAST len, status ? "(null)" : filename); | |
2986 | ||
2987 | if (status) | |
2988 | return (NULL); | |
2989 | else | |
2990 | return (filename); | |
2991 | } | |
2992 | ||
2993 | ||
2994 | /* | |
2995 | * 'install_cupsd_conf()' - Install a configuration file. | |
2996 | */ | |
2997 | ||
2998 | static http_status_t /* O - Status */ | |
2999 | install_cupsd_conf(cupsd_client_t *con) /* I - Connection */ | |
3000 | { | |
3001 | char filename[1024]; /* Configuration filename */ | |
3002 | cups_file_t *in, /* Input file */ | |
3003 | *out; /* Output file */ | |
3004 | char buffer[16384]; /* Copy buffer */ | |
3005 | ssize_t bytes; /* Number of bytes */ | |
3006 | ||
3007 | ||
3008 | /* | |
3009 | * Open the request file... | |
3010 | */ | |
3011 | ||
3012 | if ((in = cupsFileOpen(con->filename, "rb")) == NULL) | |
3013 | { | |
3014 | cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to open request file \"%s\": %s", | |
3015 | con->filename, strerror(errno)); | |
3016 | goto server_error; | |
3017 | } | |
3018 | ||
3019 | /* | |
3020 | * Open the new config file... | |
3021 | */ | |
3022 | ||
3023 | if ((out = cupsdCreateConfFile(ConfigurationFile, ConfigFilePerm)) == NULL) | |
3024 | { | |
3025 | cupsFileClose(in); | |
3026 | goto server_error; | |
3027 | } | |
3028 | ||
3029 | cupsdLogClient(con, CUPSD_LOG_INFO, "Installing config file \"%s\"...", | |
3030 | ConfigurationFile); | |
3031 | ||
3032 | /* | |
3033 | * Copy from the request to the new config file... | |
3034 | */ | |
3035 | ||
3036 | while ((bytes = cupsFileRead(in, buffer, sizeof(buffer))) > 0) | |
3037 | if (cupsFileWrite(out, buffer, (size_t)bytes) < bytes) | |
3038 | { | |
3039 | cupsdLogClient(con, CUPSD_LOG_ERROR, | |
3040 | "Unable to copy to config file \"%s\": %s", | |
3041 | ConfigurationFile, strerror(errno)); | |
3042 | ||
3043 | cupsFileClose(in); | |
3044 | cupsFileClose(out); | |
3045 | ||
3046 | snprintf(filename, sizeof(filename), "%s.N", ConfigurationFile); | |
3047 | cupsdUnlinkOrRemoveFile(filename); | |
3048 | ||
3049 | goto server_error; | |
3050 | } | |
3051 | ||
3052 | /* | |
3053 | * Close the files... | |
3054 | */ | |
3055 | ||
3056 | cupsFileClose(in); | |
3057 | ||
3058 | if (cupsdCloseCreatedConfFile(out, ConfigurationFile)) | |
3059 | goto server_error; | |
3060 | ||
3061 | /* | |
3062 | * Remove the request file... | |
3063 | */ | |
3064 | ||
3065 | cupsdUnlinkOrRemoveFile(con->filename); | |
3066 | cupsdClearString(&con->filename); | |
3067 | ||
3068 | /* | |
3069 | * Set the NeedReload flag... | |
3070 | */ | |
3071 | ||
3072 | NeedReload = RELOAD_CUPSD; | |
3073 | ReloadTime = time(NULL); | |
3074 | ||
3075 | /* | |
3076 | * Return that the file was created successfully... | |
3077 | */ | |
3078 | ||
3079 | return (HTTP_STATUS_CREATED); | |
3080 | ||
3081 | /* | |
3082 | * Common exit for errors... | |
3083 | */ | |
3084 | ||
3085 | server_error: | |
3086 | ||
3087 | cupsdUnlinkOrRemoveFile(con->filename); | |
3088 | cupsdClearString(&con->filename); | |
3089 | ||
3090 | return (HTTP_STATUS_SERVER_ERROR); | |
3091 | } | |
3092 | ||
3093 | ||
3094 | /* | |
3095 | * 'is_cgi()' - Is the resource a CGI script/program? | |
3096 | */ | |
3097 | ||
3098 | static int /* O - 1 = CGI, 0 = file */ | |
3099 | is_cgi(cupsd_client_t *con, /* I - Client connection */ | |
3100 | const char *filename, /* I - Real filename */ | |
3101 | struct stat *filestats, /* I - File information */ | |
3102 | mime_type_t *type) /* I - MIME type */ | |
3103 | { | |
3104 | const char *options; /* Options on URL */ | |
3105 | ||
3106 | ||
3107 | /* | |
3108 | * Get the options, if any... | |
3109 | */ | |
3110 | ||
3111 | if ((options = strchr(con->uri, '?')) != NULL) | |
3112 | { | |
3113 | options ++; | |
3114 | cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", options); | |
3115 | } | |
3116 | ||
3117 | /* | |
3118 | * Check for known types... | |
3119 | */ | |
3120 | ||
3121 | if (!type || _cups_strcasecmp(type->super, "application")) | |
3122 | { | |
3123 | cupsdLogClient(con, CUPSD_LOG_DEBUG2, "is_cgi: filename=\"%s\", filestats=%p, type=%s/%s, returning 0.", filename, filestats, type ? type->super : "unknown", type ? type->type : "unknown"); | |
3124 | return (0); | |
3125 | } | |
3126 | ||
3127 | if (!_cups_strcasecmp(type->type, "x-httpd-cgi") && | |
3128 | (filestats->st_mode & 0111)) | |
3129 | { | |
3130 | /* | |
3131 | * "application/x-httpd-cgi" is a CGI script. | |
3132 | */ | |
3133 | ||
3134 | cupsdSetString(&con->command, filename); | |
3135 | ||
3136 | if (options) | |
3137 | cupsdSetStringf(&con->options, " %s", options); | |
3138 | ||
3139 | cupsdLogClient(con, CUPSD_LOG_DEBUG2, "is_cgi: filename=\"%s\", filestats=%p, type=%s/%s, returning 1.", filename, filestats, type->super, type->type); | |
3140 | return (1); | |
3141 | } | |
3142 | ||
3143 | cupsdLogClient(con, CUPSD_LOG_DEBUG2, "is_cgi: filename=\"%s\", filestats=%p, type=%s/%s, returning 0.", filename, filestats, type->super, type->type); | |
3144 | return (0); | |
3145 | } | |
3146 | ||
3147 | ||
3148 | /* | |
3149 | * 'is_path_absolute()' - Is a path absolute and free of relative elements (i.e. ".."). | |
3150 | */ | |
3151 | ||
3152 | static int /* O - 0 if relative, 1 if absolute */ | |
3153 | is_path_absolute(const char *path) /* I - Input path */ | |
3154 | { | |
3155 | /* | |
3156 | * Check for a leading slash... | |
3157 | */ | |
3158 | ||
3159 | if (path[0] != '/') | |
3160 | return (0); | |
3161 | ||
3162 | /* | |
3163 | * Check for "<" or quotes in the path and reject since this is probably | |
3164 | * someone trying to inject HTML... | |
3165 | */ | |
3166 | ||
3167 | if (strchr(path, '<') != NULL || strchr(path, '\"') != NULL || strchr(path, '\'') != NULL) | |
3168 | return (0); | |
3169 | ||
3170 | /* | |
3171 | * Check for "/.." in the path... | |
3172 | */ | |
3173 | ||
3174 | while ((path = strstr(path, "/..")) != NULL) | |
3175 | { | |
3176 | if (!path[3] || path[3] == '/') | |
3177 | return (0); | |
3178 | ||
3179 | path ++; | |
3180 | } | |
3181 | ||
3182 | /* | |
3183 | * If we haven't found any relative paths, return 1 indicating an | |
3184 | * absolute path... | |
3185 | */ | |
3186 | ||
3187 | return (1); | |
3188 | } | |
3189 | ||
3190 | ||
3191 | /* | |
3192 | * 'pipe_command()' - Pipe the output of a command to the remote client. | |
3193 | */ | |
3194 | ||
3195 | static int /* O - Process ID */ | |
3196 | pipe_command(cupsd_client_t *con, /* I - Client connection */ | |
3197 | int infile, /* I - Standard input for command */ | |
3198 | int *outfile, /* O - Standard output for command */ | |
3199 | char *command, /* I - Command to run */ | |
3200 | char *options, /* I - Options for command */ | |
3201 | int root) /* I - Run as root? */ | |
3202 | { | |
3203 | int i; /* Looping var */ | |
3204 | int pid; /* Process ID */ | |
3205 | char *commptr, /* Command string pointer */ | |
3206 | commch; /* Command string character */ | |
3207 | char *uriptr; /* URI string pointer */ | |
3208 | int fds[2]; /* Pipe FDs */ | |
3209 | int argc; /* Number of arguments */ | |
3210 | int envc; /* Number of environment variables */ | |
3211 | char argbuf[10240], /* Argument buffer */ | |
3212 | *argv[100], /* Argument strings */ | |
3213 | *envp[MAX_ENV + 20]; /* Environment variables */ | |
3214 | char auth_type[256], /* AUTH_TYPE environment variable */ | |
3215 | content_length[1024], /* CONTENT_LENGTH environment variable */ | |
3216 | content_type[1024], /* CONTENT_TYPE environment variable */ | |
3217 | http_cookie[32768], /* HTTP_COOKIE environment variable */ | |
3218 | http_referer[1024], /* HTTP_REFERER environment variable */ | |
3219 | http_user_agent[1024], /* HTTP_USER_AGENT environment variable */ | |
3220 | lang[1024], /* LANG environment variable */ | |
3221 | path_info[1024], /* PATH_INFO environment variable */ | |
3222 | remote_addr[1024], /* REMOTE_ADDR environment variable */ | |
3223 | remote_host[1024], /* REMOTE_HOST environment variable */ | |
3224 | remote_user[1024], /* REMOTE_USER environment variable */ | |
3225 | script_filename[1024], /* SCRIPT_FILENAME environment variable */ | |
3226 | script_name[1024], /* SCRIPT_NAME environment variable */ | |
3227 | server_name[1024], /* SERVER_NAME environment variable */ | |
3228 | server_port[1024]; /* SERVER_PORT environment variable */ | |
3229 | ipp_attribute_t *attr; /* attributes-natural-language attribute */ | |
3230 | ||
3231 | ||
3232 | /* | |
3233 | * Parse a copy of the options string, which is of the form: | |
3234 | * | |
3235 | * argument+argument+argument | |
3236 | * ?argument+argument+argument | |
3237 | * param=value¶m=value | |
3238 | * ?param=value¶m=value | |
3239 | * /name?argument+argument+argument | |
3240 | * /name?param=value¶m=value | |
3241 | * | |
3242 | * If the string contains an "=" character after the initial name, | |
3243 | * then we treat it as a HTTP GET form request and make a copy of | |
3244 | * the remaining string for the environment variable. | |
3245 | * | |
3246 | * The string is always parsed out as command-line arguments, to | |
3247 | * be consistent with Apache... | |
3248 | */ | |
3249 | ||
3250 | cupsdLogClient(con, CUPSD_LOG_DEBUG2, "pipe_command: infile=%d, outfile=%p, command=\"%s\", options=\"%s\", root=%d", infile, outfile, command, options ? options : "(null)", root); | |
3251 | ||
3252 | argv[0] = command; | |
3253 | ||
3254 | if (options) | |
3255 | strlcpy(argbuf, options, sizeof(argbuf)); | |
3256 | else | |
3257 | argbuf[0] = '\0'; | |
3258 | ||
3259 | if (argbuf[0] == '/') | |
3260 | { | |
3261 | /* | |
3262 | * Found some trailing path information, set PATH_INFO... | |
3263 | */ | |
3264 | ||
3265 | if ((commptr = strchr(argbuf, '?')) == NULL) | |
3266 | commptr = argbuf + strlen(argbuf); | |
3267 | ||
3268 | commch = *commptr; | |
3269 | *commptr = '\0'; | |
3270 | snprintf(path_info, sizeof(path_info), "PATH_INFO=%s", argbuf); | |
3271 | *commptr = commch; | |
3272 | } | |
3273 | else | |
3274 | { | |
3275 | commptr = argbuf; | |
3276 | path_info[0] = '\0'; | |
3277 | ||
3278 | if (*commptr == ' ') | |
3279 | commptr ++; | |
3280 | } | |
3281 | ||
3282 | if (*commptr == '?' && con->operation == HTTP_STATE_GET && !con->query_string) | |
3283 | { | |
3284 | commptr ++; | |
3285 | cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", commptr); | |
3286 | } | |
3287 | ||
3288 | argc = 1; | |
3289 | ||
3290 | if (*commptr) | |
3291 | { | |
3292 | argv[argc ++] = commptr; | |
3293 | ||
3294 | for (; *commptr && argc < 99; commptr ++) | |
3295 | { | |
3296 | /* | |
3297 | * Break arguments whenever we see a + or space... | |
3298 | */ | |
3299 | ||
3300 | if (*commptr == ' ' || *commptr == '+') | |
3301 | { | |
3302 | while (*commptr == ' ' || *commptr == '+') | |
3303 | *commptr++ = '\0'; | |
3304 | ||
3305 | /* | |
3306 | * If we don't have a blank string, save it as another argument... | |
3307 | */ | |
3308 | ||
3309 | if (*commptr) | |
3310 | { | |
3311 | argv[argc] = commptr; | |
3312 | argc ++; | |
3313 | } | |
3314 | else | |
3315 | break; | |
3316 | } | |
3317 | else if (*commptr == '%' && isxdigit(commptr[1] & 255) && | |
3318 | isxdigit(commptr[2] & 255)) | |
3319 | { | |
3320 | /* | |
3321 | * Convert the %xx notation to the individual character. | |
3322 | */ | |
3323 | ||
3324 | if (commptr[1] >= '0' && commptr[1] <= '9') | |
3325 | *commptr = (char)((commptr[1] - '0') << 4); | |
3326 | else | |
3327 | *commptr = (char)((tolower(commptr[1]) - 'a' + 10) << 4); | |
3328 | ||
3329 | if (commptr[2] >= '0' && commptr[2] <= '9') | |
3330 | *commptr |= commptr[2] - '0'; | |
3331 | else | |
3332 | *commptr |= tolower(commptr[2]) - 'a' + 10; | |
3333 | ||
3334 | _cups_strcpy(commptr + 1, commptr + 3); | |
3335 | ||
3336 | /* | |
3337 | * Check for a %00 and break if that is the case... | |
3338 | */ | |
3339 | ||
3340 | if (!*commptr) | |
3341 | break; | |
3342 | } | |
3343 | } | |
3344 | } | |
3345 | ||
3346 | argv[argc] = NULL; | |
3347 | ||
3348 | /* | |
3349 | * Setup the environment variables as needed... | |
3350 | */ | |
3351 | ||
3352 | if (con->username[0]) | |
3353 | { | |
3354 | snprintf(auth_type, sizeof(auth_type), "AUTH_TYPE=%s", | |
3355 | httpGetField(con->http, HTTP_FIELD_AUTHORIZATION)); | |
3356 | ||
3357 | if ((uriptr = strchr(auth_type + 10, ' ')) != NULL) | |
3358 | *uriptr = '\0'; | |
3359 | } | |
3360 | else | |
3361 | auth_type[0] = '\0'; | |
3362 | ||
3363 | if (con->request && (attr = ippFindAttribute(con->request, "attributes-natural-language", IPP_TAG_LANGUAGE)) != NULL) | |
3364 | { | |
3365 | cups_lang_t *language = cupsLangGet(ippGetString(attr, 0, NULL)); | |
3366 | ||
3367 | snprintf(lang, sizeof(lang), "LANG=%s.UTF8", language->language); | |
3368 | cupsLangFree(language); | |
3369 | } | |
3370 | else if (con->language) | |
3371 | snprintf(lang, sizeof(lang), "LANG=%s.UTF8", con->language->language); | |
3372 | else | |
3373 | strlcpy(lang, "LANG=C", sizeof(lang)); | |
3374 | ||
3375 | strlcpy(remote_addr, "REMOTE_ADDR=", sizeof(remote_addr)); | |
3376 | httpAddrString(httpGetAddress(con->http), remote_addr + 12, | |
3377 | sizeof(remote_addr) - 12); | |
3378 | ||
3379 | snprintf(remote_host, sizeof(remote_host), "REMOTE_HOST=%s", | |
3380 | httpGetHostname(con->http, NULL, 0)); | |
3381 | ||
3382 | snprintf(script_name, sizeof(script_name), "SCRIPT_NAME=%s", con->uri); | |
3383 | if ((uriptr = strchr(script_name, '?')) != NULL) | |
3384 | *uriptr = '\0'; | |
3385 | ||
3386 | snprintf(script_filename, sizeof(script_filename), "SCRIPT_FILENAME=%s%s", | |
3387 | DocumentRoot, script_name + 12); | |
3388 | ||
3389 | snprintf(server_port, sizeof(server_port), "SERVER_PORT=%d", con->serverport); | |
3390 | ||
3391 | if (httpGetField(con->http, HTTP_FIELD_HOST)[0]) | |
3392 | { | |
3393 | char *nameptr; /* Pointer to ":port" */ | |
3394 | ||
3395 | snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s", | |
3396 | httpGetField(con->http, HTTP_FIELD_HOST)); | |
3397 | if ((nameptr = strrchr(server_name, ':')) != NULL && !strchr(nameptr, ']')) | |
3398 | *nameptr = '\0'; /* Strip trailing ":port" */ | |
3399 | } | |
3400 | else | |
3401 | snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s", | |
3402 | con->servername); | |
3403 | ||
3404 | envc = cupsdLoadEnv(envp, (int)(sizeof(envp) / sizeof(envp[0]))); | |
3405 | ||
3406 | if (auth_type[0]) | |
3407 | envp[envc ++] = auth_type; | |
3408 | ||
3409 | envp[envc ++] = lang; | |
3410 | envp[envc ++] = "REDIRECT_STATUS=1"; | |
3411 | envp[envc ++] = "GATEWAY_INTERFACE=CGI/1.1"; | |
3412 | envp[envc ++] = server_name; | |
3413 | envp[envc ++] = server_port; | |
3414 | envp[envc ++] = remote_addr; | |
3415 | envp[envc ++] = remote_host; | |
3416 | envp[envc ++] = script_name; | |
3417 | envp[envc ++] = script_filename; | |
3418 | ||
3419 | if (path_info[0]) | |
3420 | envp[envc ++] = path_info; | |
3421 | ||
3422 | if (con->username[0]) | |
3423 | { | |
3424 | snprintf(remote_user, sizeof(remote_user), "REMOTE_USER=%s", con->username); | |
3425 | ||
3426 | envp[envc ++] = remote_user; | |
3427 | } | |
3428 | ||
3429 | if (httpGetVersion(con->http) == HTTP_VERSION_1_1) | |
3430 | envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.1"; | |
3431 | else if (httpGetVersion(con->http) == HTTP_VERSION_1_0) | |
3432 | envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.0"; | |
3433 | else | |
3434 | envp[envc ++] = "SERVER_PROTOCOL=HTTP/0.9"; | |
3435 | ||
3436 | if (httpGetCookie(con->http)) | |
3437 | { | |
3438 | snprintf(http_cookie, sizeof(http_cookie), "HTTP_COOKIE=%s", | |
3439 | httpGetCookie(con->http)); | |
3440 | envp[envc ++] = http_cookie; | |
3441 | } | |
3442 | ||
3443 | if (httpGetField(con->http, HTTP_FIELD_USER_AGENT)[0]) | |
3444 | { | |
3445 | snprintf(http_user_agent, sizeof(http_user_agent), "HTTP_USER_AGENT=%s", | |
3446 | httpGetField(con->http, HTTP_FIELD_USER_AGENT)); | |
3447 | envp[envc ++] = http_user_agent; | |
3448 | } | |
3449 | ||
3450 | if (httpGetField(con->http, HTTP_FIELD_REFERER)[0]) | |
3451 | { | |
3452 | snprintf(http_referer, sizeof(http_referer), "HTTP_REFERER=%s", | |
3453 | httpGetField(con->http, HTTP_FIELD_REFERER)); | |
3454 | envp[envc ++] = http_referer; | |
3455 | } | |
3456 | ||
3457 | if (con->operation == HTTP_STATE_GET) | |
3458 | { | |
3459 | envp[envc ++] = "REQUEST_METHOD=GET"; | |
3460 | ||
3461 | if (con->query_string) | |
3462 | { | |
3463 | /* | |
3464 | * Add GET form variables after ?... | |
3465 | */ | |
3466 | ||
3467 | envp[envc ++] = con->query_string; | |
3468 | } | |
3469 | else | |
3470 | envp[envc ++] = "QUERY_STRING="; | |
3471 | } | |
3472 | else | |
3473 | { | |
3474 | sprintf(content_length, "CONTENT_LENGTH=" CUPS_LLFMT, | |
3475 | CUPS_LLCAST con->bytes); | |
3476 | snprintf(content_type, sizeof(content_type), "CONTENT_TYPE=%s", | |
3477 | httpGetField(con->http, HTTP_FIELD_CONTENT_TYPE)); | |
3478 | ||
3479 | envp[envc ++] = "REQUEST_METHOD=POST"; | |
3480 | envp[envc ++] = content_length; | |
3481 | envp[envc ++] = content_type; | |
3482 | } | |
3483 | ||
3484 | /* | |
3485 | * Tell the CGI if we are using encryption... | |
3486 | */ | |
3487 | ||
3488 | if (httpIsEncrypted(con->http)) | |
3489 | envp[envc ++] = "HTTPS=ON"; | |
3490 | ||
3491 | /* | |
3492 | * Terminate the environment array... | |
3493 | */ | |
3494 | ||
3495 | envp[envc] = NULL; | |
3496 | ||
3497 | if (LogLevel >= CUPSD_LOG_DEBUG) | |
3498 | { | |
3499 | for (i = 0; i < argc; i ++) | |
3500 | cupsdLogMessage(CUPSD_LOG_DEBUG, | |
3501 | "[CGI] argv[%d] = \"%s\"", i, argv[i]); | |
3502 | for (i = 0; i < envc; i ++) | |
3503 | cupsdLogMessage(CUPSD_LOG_DEBUG, | |
3504 | "[CGI] envp[%d] = \"%s\"", i, envp[i]); | |
3505 | } | |
3506 | ||
3507 | /* | |
3508 | * Create a pipe for the output... | |
3509 | */ | |
3510 | ||
3511 | if (cupsdOpenPipe(fds)) | |
3512 | { | |
3513 | cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to create pipe for %s - %s", | |
3514 | argv[0], strerror(errno)); | |
3515 | return (0); | |
3516 | } | |
3517 | ||
3518 | /* | |
3519 | * Then execute the command... | |
3520 | */ | |
3521 | ||
3522 | if (cupsdStartProcess(command, argv, envp, infile, fds[1], CGIPipes[1], | |
3523 | -1, -1, root, DefaultProfile, NULL, &pid) < 0) | |
3524 | { | |
3525 | /* | |
3526 | * Error - can't fork! | |
3527 | */ | |
3528 | ||
3529 | cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to start %s - %s", argv[0], | |
3530 | strerror(errno)); | |
3531 | ||
3532 | cupsdClosePipe(fds); | |
3533 | pid = 0; | |
3534 | } | |
3535 | else | |
3536 | { | |
3537 | /* | |
3538 | * Fork successful - return the PID... | |
3539 | */ | |
3540 | ||
3541 | if (con->username[0]) | |
3542 | cupsdAddCert(pid, con->username, con->type); | |
3543 | ||
3544 | cupsdLogMessage(CUPSD_LOG_DEBUG, "[CGI] Started %s (PID %d)", command, pid); | |
3545 | ||
3546 | *outfile = fds[0]; | |
3547 | close(fds[1]); | |
3548 | } | |
3549 | ||
3550 | return (pid); | |
3551 | } | |
3552 | ||
3553 | ||
3554 | /* | |
3555 | * 'valid_host()' - Is the Host: field valid? | |
3556 | */ | |
3557 | ||
3558 | static int /* O - 1 if valid, 0 if not */ | |
3559 | valid_host(cupsd_client_t *con) /* I - Client connection */ | |
3560 | { | |
3561 | cupsd_alias_t *a; /* Current alias */ | |
3562 | cupsd_netif_t *netif; /* Current network interface */ | |
3563 | const char *end; /* End character */ | |
3564 | char *ptr; /* Pointer into host value */ | |
3565 | ||
3566 | ||
3567 | /* | |
3568 | * Copy the Host: header for later use... | |
3569 | */ | |
3570 | ||
3571 | strlcpy(con->clientname, httpGetField(con->http, HTTP_FIELD_HOST), | |
3572 | sizeof(con->clientname)); | |
3573 | if ((ptr = strrchr(con->clientname, ':')) != NULL && !strchr(ptr, ']')) | |
3574 | { | |
3575 | *ptr++ = '\0'; | |
3576 | con->clientport = atoi(ptr); | |
3577 | } | |
3578 | else | |
3579 | con->clientport = con->serverport; | |
3580 | ||
3581 | /* | |
3582 | * Then validate... | |
3583 | */ | |
3584 | ||
3585 | if (httpAddrLocalhost(httpGetAddress(con->http))) | |
3586 | { | |
3587 | /* | |
3588 | * Only allow "localhost" or the equivalent IPv4 or IPv6 numerical | |
3589 | * addresses when accessing CUPS via the loopback interface... | |
3590 | */ | |
3591 | ||
3592 | return (!_cups_strcasecmp(con->clientname, "localhost") || | |
3593 | !_cups_strcasecmp(con->clientname, "localhost.") || | |
3594 | !strcmp(con->clientname, "127.0.0.1") || | |
3595 | !strcmp(con->clientname, "[::1]")); | |
3596 | } | |
3597 | ||
3598 | #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI) | |
3599 | /* | |
3600 | * Check if the hostname is something.local (Bonjour); if so, allow it. | |
3601 | */ | |
3602 | ||
3603 | if ((end = strrchr(con->clientname, '.')) != NULL && end > con->clientname && | |
3604 | !end[1]) | |
3605 | { | |
3606 | /* | |
3607 | * "." on end, work back to second-to-last "."... | |
3608 | */ | |
3609 | ||
3610 | for (end --; end > con->clientname && *end != '.'; end --); | |
3611 | } | |
3612 | ||
3613 | if (end && (!_cups_strcasecmp(end, ".local") || | |
3614 | !_cups_strcasecmp(end, ".local."))) | |
3615 | return (1); | |
3616 | #endif /* HAVE_DNSSD || HAVE_AVAHI */ | |
3617 | ||
3618 | /* | |
3619 | * Check if the hostname is an IP address... | |
3620 | */ | |
3621 | ||
3622 | if (isdigit(con->clientname[0] & 255) || con->clientname[0] == '[') | |
3623 | { | |
3624 | /* | |
3625 | * Possible IPv4/IPv6 address... | |
3626 | */ | |
3627 | ||
3628 | http_addrlist_t *addrlist; /* List of addresses */ | |
3629 | ||
3630 | ||
3631 | if ((addrlist = httpAddrGetList(con->clientname, AF_UNSPEC, NULL)) != NULL) | |
3632 | { | |
3633 | /* | |
3634 | * Good IPv4/IPv6 address... | |
3635 | */ | |
3636 | ||
3637 | httpAddrFreeList(addrlist); | |
3638 | return (1); | |
3639 | } | |
3640 | } | |
3641 | ||
3642 | /* | |
3643 | * Check for (alias) name matches... | |
3644 | */ | |
3645 | ||
3646 | for (a = (cupsd_alias_t *)cupsArrayFirst(ServerAlias); | |
3647 | a; | |
3648 | a = (cupsd_alias_t *)cupsArrayNext(ServerAlias)) | |
3649 | { | |
3650 | /* | |
3651 | * "ServerAlias *" allows all host values through... | |
3652 | */ | |
3653 | ||
3654 | if (!strcmp(a->name, "*")) | |
3655 | return (1); | |
3656 | ||
3657 | if (!_cups_strncasecmp(con->clientname, a->name, a->namelen)) | |
3658 | { | |
3659 | /* | |
3660 | * Prefix matches; check the character at the end - it must be "." or nul. | |
3661 | */ | |
3662 | ||
3663 | end = con->clientname + a->namelen; | |
3664 | ||
3665 | if (!*end || (*end == '.' && !end[1])) | |
3666 | return (1); | |
3667 | } | |
3668 | } | |
3669 | ||
3670 | #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI) | |
3671 | for (a = (cupsd_alias_t *)cupsArrayFirst(DNSSDAlias); | |
3672 | a; | |
3673 | a = (cupsd_alias_t *)cupsArrayNext(DNSSDAlias)) | |
3674 | { | |
3675 | /* | |
3676 | * "ServerAlias *" allows all host values through... | |
3677 | */ | |
3678 | ||
3679 | if (!strcmp(a->name, "*")) | |
3680 | return (1); | |
3681 | ||
3682 | if (!_cups_strncasecmp(con->clientname, a->name, a->namelen)) | |
3683 | { | |
3684 | /* | |
3685 | * Prefix matches; check the character at the end - it must be "." or nul. | |
3686 | */ | |
3687 | ||
3688 | end = con->clientname + a->namelen; | |
3689 | ||
3690 | if (!*end || (*end == '.' && !end[1])) | |
3691 | return (1); | |
3692 | } | |
3693 | } | |
3694 | #endif /* HAVE_DNSSD || HAVE_AVAHI */ | |
3695 | ||
3696 | /* | |
3697 | * Check for interface hostname matches... | |
3698 | */ | |
3699 | ||
3700 | for (netif = (cupsd_netif_t *)cupsArrayFirst(NetIFList); | |
3701 | netif; | |
3702 | netif = (cupsd_netif_t *)cupsArrayNext(NetIFList)) | |
3703 | { | |
3704 | if (!_cups_strncasecmp(con->clientname, netif->hostname, netif->hostlen)) | |
3705 | { | |
3706 | /* | |
3707 | * Prefix matches; check the character at the end - it must be "." or nul. | |
3708 | */ | |
3709 | ||
3710 | end = con->clientname + netif->hostlen; | |
3711 | ||
3712 | if (!*end || (*end == '.' && !end[1])) | |
3713 | return (1); | |
3714 | } | |
3715 | } | |
3716 | ||
3717 | return (0); | |
3718 | } | |
3719 | ||
3720 | ||
3721 | /* | |
3722 | * 'write_file()' - Send a file via HTTP. | |
3723 | */ | |
3724 | ||
3725 | static int /* O - 0 on failure, 1 on success */ | |
3726 | write_file(cupsd_client_t *con, /* I - Client connection */ | |
3727 | http_status_t code, /* I - HTTP status */ | |
3728 | char *filename, /* I - Filename */ | |
3729 | char *type, /* I - File type */ | |
3730 | struct stat *filestats) /* O - File information */ | |
3731 | { | |
3732 | con->file = open(filename, O_RDONLY); | |
3733 | ||
3734 | cupsdLogClient(con, CUPSD_LOG_DEBUG2, "write_file: code=%d, filename=\"%s\" (%d), type=\"%s\", filestats=%p.", code, filename, con->file, type ? type : "(null)", filestats); | |
3735 | ||
3736 | if (con->file < 0) | |
3737 | return (0); | |
3738 | ||
3739 | fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC); | |
3740 | ||
3741 | con->pipe_pid = 0; | |
3742 | con->sent_header = 1; | |
3743 | ||
3744 | httpClearFields(con->http); | |
3745 | ||
3746 | httpSetLength(con->http, (size_t)filestats->st_size); | |
3747 | ||
3748 | httpSetField(con->http, HTTP_FIELD_LAST_MODIFIED, | |
3749 | httpGetDateString(filestats->st_mtime)); | |
3750 | ||
3751 | if (!cupsdSendHeader(con, code, type, CUPSD_AUTH_NONE)) | |
3752 | return (0); | |
3753 | ||
3754 | cupsdAddSelect(httpGetFd(con->http), NULL, (cupsd_selfunc_t)cupsdWriteClient, con); | |
3755 | ||
3756 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "Sending file."); | |
3757 | ||
3758 | return (1); | |
3759 | } | |
3760 | ||
3761 | ||
3762 | /* | |
3763 | * 'write_pipe()' - Flag that data is available on the CGI pipe. | |
3764 | */ | |
3765 | ||
3766 | static void | |
3767 | write_pipe(cupsd_client_t *con) /* I - Client connection */ | |
3768 | { | |
3769 | cupsdLogClient(con, CUPSD_LOG_DEBUG2, "write_pipe: CGI output on fd %d.", con->file); | |
3770 | ||
3771 | con->file_ready = 1; | |
3772 | ||
3773 | cupsdRemoveSelect(con->file); | |
3774 | cupsdAddSelect(httpGetFd(con->http), NULL, (cupsd_selfunc_t)cupsdWriteClient, con); | |
3775 | ||
3776 | cupsdLogClient(con, CUPSD_LOG_DEBUG, "CGI data ready to be sent."); | |
3777 | } |