2 Unix SMB/CIFS implementation.
3 SMB backend for the Common UNIX Printing System ("CUPS")
4 Copyright 1999 by Easy Software Products
5 Copyright Andrew Tridgell 1994-1998
6 Copyright Andrew Bartlett 2002
7 Copyright Rodrigo Fernandez-Vizarra 2005
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #define TICKET_CC_DIR "/tmp"
27 #define CC_PREFIX "krb5cc_" /* prefix of the ticket cache */
28 #define CC_MAX_FILE_LEN 24
29 #define CC_MAX_FILE_PATH_LEN (sizeof(TICKET_CC_DIR)-1)+ CC_MAX_FILE_LEN+2
31 #define KRB5CCNAME "KRB5CCNAME"
32 #define MAX_RETRY_CONNECT 3
39 extern BOOL in_client; /* Boolean for client library */
46 static void list_devices(void);
47 static struct cli_state *smb_complete_connection(const char *, const char *,int , const char *, const char *, const char *, const char *, int);
48 static struct cli_state *smb_connect(const char *, const char *, int, const char *, const char *, const char *, const char *);
49 static int smb_print(struct cli_state *, char *, FILE *);
53 * 'main()' - Main entry for SMB backend.
56 int /* O - Exit status */
57 main(int argc, /* I - Number of command-line arguments */
58 char *argv[]) /* I - Command-line arguments */
60 int i; /* Looping var */
61 int copies; /* Number of copies */
62 int port; /* Port number */
63 char uri[1024], /* URI */
64 *sep, /* Pointer to separator */
65 *password; /* Password */
66 const char *username, /* Username */
67 *server, /* Server name */
68 *printer; /* Printer name */
69 const char *workgroup; /* Workgroup */
70 FILE *fp; /* File to print */
71 int status=0; /* Status of LPD job */
72 struct cli_state *cli; /* SMB interface */
78 /* we expect the URI in argv[0]. Detect the case where it is in argv[1] and cope */
79 if (argc > 2 && strncmp(argv[0],"smb://", 6) && !strncmp(argv[1],"smb://", 6)) {
87 * NEW! In CUPS 1.1 the backends are run with no arguments to list the
88 * available devices. These can be devices served by this backend
89 * or any other backends (i.e. you can have an SNMP backend that
90 * is only used to enumerate the available network printers... :)
97 if (argc < 6 || argc > 7)
99 fprintf(stderr, "Usage: %s [DEVICE_URI] job-id user title copies options [file]\n",
101 fputs(" The DEVICE_URI environment variable can also contain the\n", stderr);
102 fputs(" destination printer:\n", stderr);
104 fputs(" smb://[username:password@][workgroup/]server[:port]/printer\n", stderr);
109 * If we have 7 arguments, print the file named on the command-line.
110 * Otherwise, print data from stdin...
117 * Print from Copy stdin to a temporary file...
123 else if ((fp = fopen(argv[6], "rb")) == NULL)
125 perror("ERROR: Unable to open print file");
129 copies = atoi(argv[4]);
135 if (getenv("DEVICE_URI") != NULL)
136 strncpy(uri, getenv("DEVICE_URI"), sizeof(uri) - 1);
137 else if (strncmp(argv[0], "smb://", 6) == 0)
138 strncpy(uri, argv[0], sizeof(uri) - 1);
141 fputs("ERROR: No device URI found in DEVICE_URI environment variable or argv[0] !\n", stderr);
145 uri[sizeof(uri) - 1] = '\0';
148 * Extract the destination from the URI...
151 if ((sep = strrchr_m(uri, '@')) != NULL)
159 * Extract password as needed...
162 if ((password = strchr_m(username, ':')) != NULL)
174 if ((sep = strchr_m(server, '/')) == NULL)
176 fputs("ERROR: Bad URI - need printer name!\n", stderr);
183 if ((sep = strchr_m(printer, '/')) != NULL)
186 * Convert to smb://[username:password@]workgroup/server/printer...
198 if ((sep = strrchr_m(server, ':')) != NULL)
209 * Setup the SAMBA server state...
212 setup_logging("smbspool", True);
214 in_client = True; /* Make sure that we tell lp_load we are */
216 if (!lp_load(dyn_CONFIGFILE, True, False, False, True))
218 fprintf(stderr, "ERROR: Can't load %s - run testparm to debug it\n", dyn_CONFIGFILE);
222 if (workgroup == NULL)
223 workgroup = lp_workgroup();
229 if ((cli = smb_connect(workgroup, server, port, printer, username, password, argv[2])) == NULL)
231 if (getenv("CLASS") == NULL)
233 fprintf(stderr, "ERROR: Unable to connect to CIFS host, will retry in 60 seconds...\n");
234 sleep (60); /* should just waiting and retrying fix authentication ??? */
239 fprintf(stderr, "ERROR: Unable to connect to CIFS host, trying next printer...\n");
244 while ((cli == NULL) && (tries < MAX_RETRY_CONNECT));
247 fprintf(stderr, "ERROR: Unable to connect to CIFS host after (tried %d times)\n", tries);
252 * Now that we are connected to the server, ignore SIGTERM so that we
253 * can finish out any page data the driver sends (e.g. to eject the
254 * current page... Only ignore SIGTERM if we are printing data from
255 * stdin (otherwise you can't cancel raw jobs...)
259 CatchSignal(SIGTERM, SIG_IGN);
265 for (i = 0; i < copies; i ++)
266 if ((status = smb_print(cli, argv[3] /* title */, fp)) != 0)
272 * Return the queue status...
280 * 'list_devices()' - List the available printers seen on the network...
287 * Eventually, search the local workgroup for available hosts and printers.
290 puts("network smb \"Unknown\" \"Windows Printer via SAMBA\"");
295 * get the name of the newest ticket cache for the uid user.
296 * pam_krb5 defines a non default ticket cache for each user
299 char * get_ticket_cache( uid_t uid )
301 char *ticket_file = NULL;
302 SMB_STRUCT_DIR *tcdir; /* directory where ticket caches are stored */
303 SMB_STRUCT_DIRENT *dirent; /* directory entry */
304 char *filename = NULL; /* holds file names on the tmp directory */
306 char user_cache_prefix[CC_MAX_FILE_LEN];
307 char file_path[CC_MAX_FILE_PATH_LEN];
310 snprintf(user_cache_prefix, CC_MAX_FILE_LEN, "%s%d", CC_PREFIX, uid );
311 tcdir = sys_opendir( TICKET_CC_DIR );
315 while ( (dirent = sys_readdir( tcdir ) ) )
317 filename = dirent->d_name;
318 snprintf(file_path, CC_MAX_FILE_PATH_LEN,"%s/%s", TICKET_CC_DIR, filename);
319 if (sys_stat(file_path, &buf) == 0 )
321 if ( ( buf.st_uid == uid ) && ( S_ISREG(buf.st_mode) ) )
324 * check the user id of the file to prevent denial of
325 * service attacks by creating fake ticket caches for the
328 if ( strstr( filename, user_cache_prefix ) )
330 if ( buf.st_mtime > t )
333 * a newer ticket cache found
336 ticket_file=SMB_STRDUP(file_path);
346 if ( ticket_file == NULL )
348 /* no ticket cache found */
349 fprintf(stderr, "ERROR: No ticket cache found for userid=%d\n", uid);
356 static struct cli_state
357 *smb_complete_connection(const char *myname,
360 const char *username,
361 const char *password,
362 const char *workgroup,
366 struct cli_state *cli; /* New connection */
369 /* Start the SMB connection */
370 nt_status = cli_start_connection( &cli, myname, server, NULL, port,
371 Undefined, flags, NULL);
372 if (!NT_STATUS_IS_OK(nt_status))
377 /* We pretty much guarentee password must be valid or a pointer
383 if ( (username) && (*username) &&
384 (strlen(password) == 0 ) &&
385 (cli->use_kerberos) )
387 /* Use kerberos authentication */
392 if ( !(pw = sys_getpwnam(username)) ) {
393 fprintf(stderr,"ERROR Can not get %s uid\n", username);
399 * Get the ticket cache of the user to set KRB5CCNAME env
402 cache_file = get_ticket_cache( pw->pw_uid );
403 if ( cache_file == NULL )
405 fprintf(stderr, "ERROR: Can not get the ticket cache for %s\n", username);
410 if ( setenv(KRB5CCNAME, cache_file, OVERWRITE) < 0 )
412 fprintf(stderr, "ERROR: Can not add KRB5CCNAME to the environment");
420 * Change the UID of the process to be able to read the kerberos
428 if (!cli_session_setup(cli, username, password, strlen(password)+1,
429 password, strlen(password)+1,
432 fprintf(stderr,"ERROR: Session setup failed: %s\n", cli_errstr(cli));
433 if (NT_STATUS_V(cli_nt_error(cli)) ==
434 NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED))
436 fprintf(stderr, "did you forget to run kinit?\n");
443 if (!cli_send_tconX(cli, share, "?????", password, strlen(password)+1))
445 fprintf(stderr, "ERROR: Tree connect failed (%s)\n", cli_errstr(cli));
454 * 'smb_connect()' - Return a connection to a server.
457 static struct cli_state * /* O - SMB connection */
458 smb_connect(const char *workgroup, /* I - Workgroup */
459 const char *server, /* I - Server */
460 const int port, /* I - Port */
461 const char *share, /* I - Printer */
462 const char *username, /* I - Username */
463 const char *password, /* I - Password */
464 const char *jobusername) /* I - User who issued the print job */
466 struct cli_state *cli; /* New connection */
467 pstring myname; /* Client name */
471 * Get the names and addresses of the client and server...
476 /* See if we have a username first. This is for backwards compatible
477 behavior with 3.0.14a */
479 if ( username && *username )
481 cli = smb_complete_connection(myname, server, port, username,
482 password, workgroup, share, 0 );
488 * Try to use the user kerberos credentials (if any) to authenticate
490 cli = smb_complete_connection(myname, server, port, jobusername, "",
492 CLI_FULL_CONNECTION_USE_KERBEROS );
494 if (cli ) { return cli; }
496 /* give a chance for a passwordless NTLMSSP session setup */
498 pwd = getpwuid(geteuid());
503 cli = smb_complete_connection(myname, server, port, pwd->pw_name, "",
504 workgroup, share, 0);
506 if (cli) { return cli; }
509 * last try. Use anonymous authentication
512 cli = smb_complete_connection(myname, server, port, "", "",
513 workgroup, share, 0);
515 * Return the new connection...
523 * 'smb_print()' - Queue a job for printing using the SMB protocol.
526 static int /* O - 0 = success, non-0 = failure */
527 smb_print(struct cli_state *cli, /* I - SMB connection */
528 char *title, /* I - Title/job name */
529 FILE *fp) /* I - File to print */
531 int fnum; /* File number */
532 int nbytes, /* Number of bytes read */
533 tbytes; /* Total bytes read */
534 char buffer[8192], /* Buffer for copy */
535 *ptr; /* Pointer into tile */
539 * Sanitize the title...
542 for (ptr = title; *ptr; ptr ++)
543 if (!isalnum((int)*ptr) && !isspace((int)*ptr))
547 * Open the printer device...
550 if ((fnum = cli_open(cli, title, O_RDWR | O_CREAT | O_TRUNC, DENY_NONE)) == -1)
552 fprintf(stderr, "ERROR: %s opening remote spool %s\n",
553 cli_errstr(cli), title);
558 * Copy the file to the printer...
566 while ((nbytes = fread(buffer, 1, sizeof(buffer), fp)) > 0)
568 if (cli_write(cli, fnum, 0, buffer, tbytes, nbytes) != nbytes)
570 fprintf(stderr, "ERROR: Error writing spool: %s\n", cli_errstr(cli));
577 if (!cli_close(cli, fnum))
579 fprintf(stderr, "ERROR: %s closing remote spool %s\n",
580 cli_errstr(cli), title);