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 */
79 /* we expect the URI in argv[0]. Detect the case where it is in argv[1] and cope */
80 if (argc > 2 && strncmp(argv[0],"smb://", 6) && !strncmp(argv[1],"smb://", 6)) {
88 * NEW! In CUPS 1.1 the backends are run with no arguments to list the
89 * available devices. These can be devices served by this backend
90 * or any other backends (i.e. you can have an SNMP backend that
91 * is only used to enumerate the available network printers... :)
98 if (argc < 6 || argc > 7)
100 fprintf(stderr, "Usage: %s [DEVICE_URI] job-id user title copies options [file]\n",
102 fputs(" The DEVICE_URI environment variable can also contain the\n", stderr);
103 fputs(" destination printer:\n", stderr);
105 fputs(" smb://[username:password@][workgroup/]server[:port]/printer\n", stderr);
110 * If we have 7 arguments, print the file named on the command-line.
111 * Otherwise, print data from stdin...
118 * Print from Copy stdin to a temporary file...
124 else if ((fp = fopen(argv[6], "rb")) == NULL)
126 perror("ERROR: Unable to open print file");
130 copies = atoi(argv[4]);
136 dev_uri = getenv("DEVICE_URI");
138 strncpy(uri, dev_uri, sizeof(uri) - 1);
139 else if (strncmp(argv[0], "smb://", 6) == 0)
140 strncpy(uri, argv[0], sizeof(uri) - 1);
143 fputs("ERROR: No device URI found in DEVICE_URI environment variable or argv[0] !\n", stderr);
147 uri[sizeof(uri) - 1] = '\0';
150 * Extract the destination from the URI...
153 if ((sep = strrchr_m(uri, '@')) != NULL)
161 * Extract password as needed...
164 if ((password = strchr_m(username, ':')) != NULL)
176 if ((sep = strchr_m(server, '/')) == NULL)
178 fputs("ERROR: Bad URI - need printer name!\n", stderr);
185 if ((sep = strchr_m(printer, '/')) != NULL)
188 * Convert to smb://[username:password@]workgroup/server/printer...
200 if ((sep = strrchr_m(server, ':')) != NULL)
211 * Setup the SAMBA server state...
214 setup_logging("smbspool", True);
216 in_client = True; /* Make sure that we tell lp_load we are */
220 if (!lp_load(dyn_CONFIGFILE, True, False, False, True))
222 fprintf(stderr, "ERROR: Can't load %s - run testparm to debug it\n", dyn_CONFIGFILE);
226 if (workgroup == NULL)
227 workgroup = lp_workgroup();
233 if ((cli = smb_connect(workgroup, server, port, printer, username, password, argv[2])) == NULL)
235 if (getenv("CLASS") == NULL)
237 fprintf(stderr, "ERROR: Unable to connect to CIFS host, will retry in 60 seconds...\n");
238 sleep (60); /* should just waiting and retrying fix authentication ??? */
243 fprintf(stderr, "ERROR: Unable to connect to CIFS host, trying next printer...\n");
248 while ((cli == NULL) && (tries < MAX_RETRY_CONNECT));
251 fprintf(stderr, "ERROR: Unable to connect to CIFS host after (tried %d times)\n", tries);
256 * Now that we are connected to the server, ignore SIGTERM so that we
257 * can finish out any page data the driver sends (e.g. to eject the
258 * current page... Only ignore SIGTERM if we are printing data from
259 * stdin (otherwise you can't cancel raw jobs...)
263 CatchSignal(SIGTERM, SIG_IGN);
269 for (i = 0; i < copies; i ++)
270 if ((status = smb_print(cli, argv[3] /* title */, fp)) != 0)
276 * Return the queue status...
284 * 'list_devices()' - List the available printers seen on the network...
291 * Eventually, search the local workgroup for available hosts and printers.
294 puts("network smb \"Unknown\" \"Windows Printer via SAMBA\"");
299 * get the name of the newest ticket cache for the uid user.
300 * pam_krb5 defines a non default ticket cache for each user
303 char * get_ticket_cache( uid_t uid )
305 char *ticket_file = NULL;
306 SMB_STRUCT_DIR *tcdir; /* directory where ticket caches are stored */
307 SMB_STRUCT_DIRENT *dirent; /* directory entry */
308 char *filename = NULL; /* holds file names on the tmp directory */
310 char user_cache_prefix[CC_MAX_FILE_LEN];
311 char file_path[CC_MAX_FILE_PATH_LEN];
314 snprintf(user_cache_prefix, CC_MAX_FILE_LEN, "%s%d", CC_PREFIX, uid );
315 tcdir = sys_opendir( TICKET_CC_DIR );
319 while ( (dirent = sys_readdir( tcdir ) ) )
321 filename = dirent->d_name;
322 snprintf(file_path, CC_MAX_FILE_PATH_LEN,"%s/%s", TICKET_CC_DIR, filename);
323 if (sys_stat(file_path, &buf) == 0 )
325 if ( ( buf.st_uid == uid ) && ( S_ISREG(buf.st_mode) ) )
328 * check the user id of the file to prevent denial of
329 * service attacks by creating fake ticket caches for the
332 if ( strstr( filename, user_cache_prefix ) )
334 if ( buf.st_mtime > t )
337 * a newer ticket cache found
340 ticket_file=SMB_STRDUP(file_path);
350 if ( ticket_file == NULL )
352 /* no ticket cache found */
353 fprintf(stderr, "ERROR: No ticket cache found for userid=%d\n", uid);
360 static struct cli_state
361 *smb_complete_connection(const char *myname,
364 const char *username,
365 const char *password,
366 const char *workgroup,
370 struct cli_state *cli; /* New connection */
373 /* Start the SMB connection */
374 nt_status = cli_start_connection( &cli, myname, server, NULL, port,
375 Undefined, flags, NULL);
376 if (!NT_STATUS_IS_OK(nt_status))
381 /* We pretty much guarentee password must be valid or a pointer
387 if ( (username) && (*username) &&
388 (strlen(password) == 0 ) &&
389 (cli->use_kerberos) )
391 /* Use kerberos authentication */
396 if ( !(pw = sys_getpwnam(username)) ) {
397 fprintf(stderr,"ERROR Can not get %s uid\n", username);
403 * Get the ticket cache of the user to set KRB5CCNAME env
406 cache_file = get_ticket_cache( pw->pw_uid );
407 if ( cache_file == NULL )
409 fprintf(stderr, "ERROR: Can not get the ticket cache for %s\n", username);
414 if ( setenv(KRB5CCNAME, cache_file, OVERWRITE) < 0 )
416 fprintf(stderr, "ERROR: Can not add KRB5CCNAME to the environment");
424 * Change the UID of the process to be able to read the kerberos
432 if (!NT_STATUS_IS_OK(cli_session_setup(cli, username,
433 password, strlen(password)+1,
434 password, strlen(password)+1,
437 fprintf(stderr,"ERROR: Session setup failed: %s\n", cli_errstr(cli));
438 if (NT_STATUS_V(cli_nt_error(cli)) ==
439 NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED))
441 fprintf(stderr, "did you forget to run kinit?\n");
448 if (!cli_send_tconX(cli, share, "?????", password, strlen(password)+1))
450 fprintf(stderr, "ERROR: Tree connect failed (%s)\n", cli_errstr(cli));
459 * 'smb_connect()' - Return a connection to a server.
462 static struct cli_state * /* O - SMB connection */
463 smb_connect(const char *workgroup, /* I - Workgroup */
464 const char *server, /* I - Server */
465 const int port, /* I - Port */
466 const char *share, /* I - Printer */
467 const char *username, /* I - Username */
468 const char *password, /* I - Password */
469 const char *jobusername) /* I - User who issued the print job */
471 struct cli_state *cli; /* New connection */
472 pstring myname; /* Client name */
476 * Get the names and addresses of the client and server...
481 /* See if we have a username first. This is for backwards compatible
482 behavior with 3.0.14a */
484 if ( username && *username )
486 cli = smb_complete_connection(myname, server, port, username,
487 password, workgroup, share, 0 );
493 * Try to use the user kerberos credentials (if any) to authenticate
495 cli = smb_complete_connection(myname, server, port, jobusername, "",
497 CLI_FULL_CONNECTION_USE_KERBEROS );
499 if (cli ) { return cli; }
501 /* give a chance for a passwordless NTLMSSP session setup */
503 pwd = getpwuid(geteuid());
508 cli = smb_complete_connection(myname, server, port, pwd->pw_name, "",
509 workgroup, share, 0);
511 if (cli) { return cli; }
514 * last try. Use anonymous authentication
517 cli = smb_complete_connection(myname, server, port, "", "",
518 workgroup, share, 0);
520 * Return the new connection...
528 * 'smb_print()' - Queue a job for printing using the SMB protocol.
531 static int /* O - 0 = success, non-0 = failure */
532 smb_print(struct cli_state *cli, /* I - SMB connection */
533 char *title, /* I - Title/job name */
534 FILE *fp) /* I - File to print */
536 int fnum; /* File number */
537 int nbytes, /* Number of bytes read */
538 tbytes; /* Total bytes read */
539 char buffer[8192], /* Buffer for copy */
540 *ptr; /* Pointer into tile */
544 * Sanitize the title...
547 for (ptr = title; *ptr; ptr ++)
548 if (!isalnum((int)*ptr) && !isspace((int)*ptr))
552 * Open the printer device...
555 if ((fnum = cli_open(cli, title, O_RDWR | O_CREAT | O_TRUNC, DENY_NONE)) == -1)
557 fprintf(stderr, "ERROR: %s opening remote spool %s\n",
558 cli_errstr(cli), title);
563 * Copy the file to the printer...
571 while ((nbytes = fread(buffer, 1, sizeof(buffer), fp)) > 0)
573 if (cli_write(cli, fnum, 0, buffer, tbytes, nbytes) != nbytes)
575 fprintf(stderr, "ERROR: Error writing spool: %s\n", cli_errstr(cli));
582 if (!cli_close(cli, fnum))
584 fprintf(stderr, "ERROR: %s closing remote spool %s\n",
585 cli_errstr(cli), title);