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 3 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 *);
50 static char * uri_unescape_alloc(const char *);
54 * 'main()' - Main entry for SMB backend.
57 int /* O - Exit status */
58 main(int argc, /* I - Number of command-line arguments */
59 char *argv[]) /* I - Command-line arguments */
61 int i; /* Looping var */
62 int copies; /* Number of copies */
63 int port; /* Port number */
64 char uri[1024], /* URI */
65 *sep, /* Pointer to separator */
66 *tmp, *tmp2, /* Temp pointers to do escaping */
67 *password; /* Password */
68 char *username, /* Username */
69 *server, /* Server name */
70 *printer; /* Printer name */
71 const char *workgroup; /* Workgroup */
72 FILE *fp; /* File to print */
73 int status=0; /* Status of LPD job */
74 struct cli_state *cli; /* SMB interface */
81 /* we expect the URI in argv[0]. Detect the case where it is in argv[1] and cope */
82 if (argc > 2 && strncmp(argv[0],"smb://", 6) && !strncmp(argv[1],"smb://", 6)) {
90 * NEW! In CUPS 1.1 the backends are run with no arguments to list the
91 * available devices. These can be devices served by this backend
92 * or any other backends (i.e. you can have an SNMP backend that
93 * is only used to enumerate the available network printers... :)
100 if (argc < 6 || argc > 7)
102 fprintf(stderr, "Usage: %s [DEVICE_URI] job-id user title copies options [file]\n",
104 fputs(" The DEVICE_URI environment variable can also contain the\n", stderr);
105 fputs(" destination printer:\n", stderr);
107 fputs(" smb://[username:password@][workgroup/]server[:port]/printer\n", stderr);
112 * If we have 7 arguments, print the file named on the command-line.
113 * Otherwise, print data from stdin...
120 * Print from Copy stdin to a temporary file...
126 else if ((fp = fopen(argv[6], "rb")) == NULL)
128 perror("ERROR: Unable to open print file");
132 copies = atoi(argv[4]);
138 dev_uri = getenv("DEVICE_URI");
140 strncpy(uri, dev_uri, sizeof(uri) - 1);
141 else if (strncmp(argv[0], "smb://", 6) == 0)
142 strncpy(uri, argv[0], sizeof(uri) - 1);
145 fputs("ERROR: No device URI found in DEVICE_URI environment variable or argv[0] !\n", stderr);
149 uri[sizeof(uri) - 1] = '\0';
152 * Extract the destination from the URI...
155 if ((sep = strrchr_m(uri, '@')) != NULL)
160 /* username is in tmp */
165 * Extract password as needed...
168 if ((tmp2 = strchr_m(tmp, ':')) != NULL) {
170 password = uri_unescape_alloc(tmp2);
174 username = uri_unescape_alloc(tmp);
185 if ((sep = strchr_m(tmp, '/')) == NULL)
187 fputs("ERROR: Bad URI - need printer name!\n", stderr);
194 if ((sep = strchr_m(tmp2, '/')) != NULL)
197 * Convert to smb://[username:password@]workgroup/server/printer...
202 workgroup = uri_unescape_alloc(tmp);
203 server = uri_unescape_alloc(tmp2);
204 printer = uri_unescape_alloc(sep);
208 server = uri_unescape_alloc(tmp);
209 printer = uri_unescape_alloc(tmp2);
212 if ((sep = strrchr_m(server, ':')) != NULL)
223 * Setup the SAMBA server state...
226 setup_logging("smbspool", True);
228 in_client = True; /* Make sure that we tell lp_load we are */
232 if (!lp_load(dyn_CONFIGFILE, True, False, False, True))
234 fprintf(stderr, "ERROR: Can't load %s - run testparm to debug it\n", dyn_CONFIGFILE);
238 if (workgroup == NULL)
239 workgroup = lp_workgroup();
245 if ((cli = smb_connect(workgroup, server, port, printer, username, password, argv[2])) == NULL)
247 if (getenv("CLASS") == NULL)
249 fprintf(stderr, "ERROR: Unable to connect to CIFS host, will retry in 60 seconds...\n");
250 sleep (60); /* should just waiting and retrying fix authentication ??? */
255 fprintf(stderr, "ERROR: Unable to connect to CIFS host, trying next printer...\n");
260 while ((cli == NULL) && (tries < MAX_RETRY_CONNECT));
263 fprintf(stderr, "ERROR: Unable to connect to CIFS host after (tried %d times)\n", tries);
268 * Now that we are connected to the server, ignore SIGTERM so that we
269 * can finish out any page data the driver sends (e.g. to eject the
270 * current page... Only ignore SIGTERM if we are printing data from
271 * stdin (otherwise you can't cancel raw jobs...)
275 CatchSignal(SIGTERM, SIG_IGN);
281 for (i = 0; i < copies; i ++)
282 if ((status = smb_print(cli, argv[3] /* title */, fp)) != 0)
288 * Return the queue status...
296 * 'list_devices()' - List the available printers seen on the network...
303 * Eventually, search the local workgroup for available hosts and printers.
306 puts("network smb \"Unknown\" \"Windows Printer via SAMBA\"");
311 * get the name of the newest ticket cache for the uid user.
312 * pam_krb5 defines a non default ticket cache for each user
315 char * get_ticket_cache( uid_t uid )
317 char *ticket_file = NULL;
318 SMB_STRUCT_DIR *tcdir; /* directory where ticket caches are stored */
319 SMB_STRUCT_DIRENT *dirent; /* directory entry */
320 char *filename = NULL; /* holds file names on the tmp directory */
322 char user_cache_prefix[CC_MAX_FILE_LEN];
323 char file_path[CC_MAX_FILE_PATH_LEN];
326 snprintf(user_cache_prefix, CC_MAX_FILE_LEN, "%s%d", CC_PREFIX, uid );
327 tcdir = sys_opendir( TICKET_CC_DIR );
331 while ( (dirent = sys_readdir( tcdir ) ) )
333 filename = dirent->d_name;
334 snprintf(file_path, CC_MAX_FILE_PATH_LEN,"%s/%s", TICKET_CC_DIR, filename);
335 if (sys_stat(file_path, &buf) == 0 )
337 if ( ( buf.st_uid == uid ) && ( S_ISREG(buf.st_mode) ) )
340 * check the user id of the file to prevent denial of
341 * service attacks by creating fake ticket caches for the
344 if ( strstr( filename, user_cache_prefix ) )
346 if ( buf.st_mtime > t )
349 * a newer ticket cache found
352 ticket_file=SMB_STRDUP(file_path);
362 if ( ticket_file == NULL )
364 /* no ticket cache found */
365 fprintf(stderr, "ERROR: No ticket cache found for userid=%d\n", uid);
372 static struct cli_state
373 *smb_complete_connection(const char *myname,
376 const char *username,
377 const char *password,
378 const char *workgroup,
382 struct cli_state *cli; /* New connection */
385 /* Start the SMB connection */
386 nt_status = cli_start_connection( &cli, myname, server, NULL, port,
387 Undefined, flags, NULL);
388 if (!NT_STATUS_IS_OK(nt_status))
393 /* We pretty much guarentee password must be valid or a pointer
399 if ( (username) && (*username) &&
400 (strlen(password) == 0 ) &&
401 (cli->use_kerberos) )
403 /* Use kerberos authentication */
408 if ( !(pw = sys_getpwnam(username)) ) {
409 fprintf(stderr,"ERROR Can not get %s uid\n", username);
415 * Get the ticket cache of the user to set KRB5CCNAME env
418 cache_file = get_ticket_cache( pw->pw_uid );
419 if ( cache_file == NULL )
421 fprintf(stderr, "ERROR: Can not get the ticket cache for %s\n", username);
426 if ( setenv(KRB5CCNAME, cache_file, OVERWRITE) < 0 )
428 fprintf(stderr, "ERROR: Can not add KRB5CCNAME to the environment");
436 * Change the UID of the process to be able to read the kerberos
444 if (!NT_STATUS_IS_OK(cli_session_setup(cli, username,
445 password, strlen(password)+1,
446 password, strlen(password)+1,
449 fprintf(stderr,"ERROR: Session setup failed: %s\n", cli_errstr(cli));
450 if (NT_STATUS_V(cli_nt_error(cli)) ==
451 NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED))
453 fprintf(stderr, "did you forget to run kinit?\n");
460 if (!cli_send_tconX(cli, share, "?????", password, strlen(password)+1))
462 fprintf(stderr, "ERROR: Tree connect failed (%s)\n", cli_errstr(cli));
471 * 'smb_connect()' - Return a connection to a server.
474 static struct cli_state * /* O - SMB connection */
475 smb_connect(const char *workgroup, /* I - Workgroup */
476 const char *server, /* I - Server */
477 const int port, /* I - Port */
478 const char *share, /* I - Printer */
479 const char *username, /* I - Username */
480 const char *password, /* I - Password */
481 const char *jobusername) /* I - User who issued the print job */
483 struct cli_state *cli; /* New connection */
484 pstring myname; /* Client name */
488 * Get the names and addresses of the client and server...
493 /* See if we have a username first. This is for backwards compatible
494 behavior with 3.0.14a */
496 if ( username && *username )
498 cli = smb_complete_connection(myname, server, port, username,
499 password, workgroup, share, 0 );
505 * Try to use the user kerberos credentials (if any) to authenticate
507 cli = smb_complete_connection(myname, server, port, jobusername, "",
509 CLI_FULL_CONNECTION_USE_KERBEROS );
511 if (cli ) { return cli; }
513 /* give a chance for a passwordless NTLMSSP session setup */
515 pwd = getpwuid(geteuid());
520 cli = smb_complete_connection(myname, server, port, pwd->pw_name, "",
521 workgroup, share, 0);
523 if (cli) { return cli; }
526 * last try. Use anonymous authentication
529 cli = smb_complete_connection(myname, server, port, "", "",
530 workgroup, share, 0);
532 * Return the new connection...
540 * 'smb_print()' - Queue a job for printing using the SMB protocol.
543 static int /* O - 0 = success, non-0 = failure */
544 smb_print(struct cli_state *cli, /* I - SMB connection */
545 char *title, /* I - Title/job name */
546 FILE *fp) /* I - File to print */
548 int fnum; /* File number */
549 int nbytes, /* Number of bytes read */
550 tbytes; /* Total bytes read */
551 char buffer[8192], /* Buffer for copy */
552 *ptr; /* Pointer into tile */
556 * Sanitize the title...
559 for (ptr = title; *ptr; ptr ++)
560 if (!isalnum((int)*ptr) && !isspace((int)*ptr))
564 * Open the printer device...
567 if ((fnum = cli_open(cli, title, O_RDWR | O_CREAT | O_TRUNC, DENY_NONE)) == -1)
569 fprintf(stderr, "ERROR: %s opening remote spool %s\n",
570 cli_errstr(cli), title);
575 * Copy the file to the printer...
583 while ((nbytes = fread(buffer, 1, sizeof(buffer), fp)) > 0)
585 if (cli_write(cli, fnum, 0, buffer, tbytes, nbytes) != nbytes)
587 fprintf(stderr, "ERROR: Error writing spool: %s\n", cli_errstr(cli));
594 if (!cli_close(cli, fnum))
596 fprintf(stderr, "ERROR: %s closing remote spool %s\n",
597 cli_errstr(cli), title);
604 static char *uri_unescape_alloc(const char *uritok)
608 ret = (char *)SMB_STRDUP(uritok);
609 if (!ret) return NULL;
611 rfc1738_unescape(ret);