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, see <http://www.gnu.org/licenses/>.
25 #define TICKET_CC_DIR "/tmp"
26 #define CC_PREFIX "krb5cc_" /* prefix of the ticket cache */
27 #define CC_MAX_FILE_LEN 24
28 #define CC_MAX_FILE_PATH_LEN (sizeof(TICKET_CC_DIR)-1)+ CC_MAX_FILE_LEN+2
30 #define KRB5CCNAME "KRB5CCNAME"
31 #define MAX_RETRY_CONNECT 3
38 extern bool in_client; /* Boolean for client library */
45 static void list_devices(void);
46 static struct cli_state *smb_complete_connection(const char *, const char *,int , const char *, const char *, const char *, const char *, int);
47 static struct cli_state *smb_connect(const char *, const char *, int, const char *, const char *, const char *, const char *);
48 static int smb_print(struct cli_state *, char *, FILE *);
49 static char * uri_unescape_alloc(const char *);
51 static bool smb_encrypt;
55 * 'main()' - Main entry for SMB backend.
58 int /* O - Exit status */
59 main(int argc, /* I - Number of command-line arguments */
60 char *argv[]) /* I - Command-line arguments */
62 int i; /* Looping var */
63 int copies; /* Number of copies */
64 int port; /* Port number */
65 char uri[1024], /* URI */
66 *sep, /* Pointer to separator */
67 *tmp, *tmp2, /* Temp pointers to do escaping */
68 *password; /* Password */
69 char *username, /* Username */
70 *server, /* Server name */
71 *printer; /* Printer name */
72 const char *workgroup; /* Workgroup */
73 FILE *fp; /* File to print */
74 int status=1; /* Status of LPD job */
75 struct cli_state *cli; /* SMB interface */
79 TALLOC_CTX *frame = talloc_stackframe();
83 /* we expect the URI in argv[0]. Detect the case where it is in argv[1] and cope */
84 if (argc > 2 && strncmp(argv[0],"smb://", 6) && !strncmp(argv[1],"smb://", 6)) {
92 * NEW! In CUPS 1.1 the backends are run with no arguments to list the
93 * available devices. These can be devices served by this backend
94 * or any other backends (i.e. you can have an SNMP backend that
95 * is only used to enumerate the available network printers... :)
103 if (argc < 6 || argc > 7)
105 fprintf(stderr, "Usage: %s [DEVICE_URI] job-id user title copies options [file]\n",
107 fputs(" The DEVICE_URI environment variable can also contain the\n", stderr);
108 fputs(" destination printer:\n", stderr);
110 fputs(" smb://[username:password@][workgroup/]server[:port]/printer\n", stderr);
115 * If we have 7 arguments, print the file named on the command-line.
116 * Otherwise, print data from stdin...
123 * Print from Copy stdin to a temporary file...
129 else if ((fp = fopen(argv[6], "rb")) == NULL)
131 perror("ERROR: Unable to open print file");
135 copies = atoi(argv[4]);
141 dev_uri = getenv("DEVICE_URI");
143 strncpy(uri, dev_uri, sizeof(uri) - 1);
144 else if (strncmp(argv[0], "smb://", 6) == 0)
145 strncpy(uri, argv[0], sizeof(uri) - 1);
148 fputs("ERROR: No device URI found in DEVICE_URI environment variable or argv[0] !\n", stderr);
152 uri[sizeof(uri) - 1] = '\0';
155 * Extract the destination from the URI...
158 if ((sep = strrchr_m(uri, '@')) != NULL)
163 /* username is in tmp */
168 * Extract password as needed...
171 if ((tmp2 = strchr_m(tmp, ':')) != NULL) {
173 password = uri_unescape_alloc(tmp2);
177 username = uri_unescape_alloc(tmp);
188 if ((sep = strchr_m(tmp, '/')) == NULL)
190 fputs("ERROR: Bad URI - need printer name!\n", stderr);
197 if ((sep = strchr_m(tmp2, '/')) != NULL)
200 * Convert to smb://[username:password@]workgroup/server/printer...
205 workgroup = uri_unescape_alloc(tmp);
206 server = uri_unescape_alloc(tmp2);
207 printer = uri_unescape_alloc(sep);
211 server = uri_unescape_alloc(tmp);
212 printer = uri_unescape_alloc(tmp2);
215 if ((sep = strrchr_m(server, ':')) != NULL)
226 * Setup the SAMBA server state...
229 setup_logging("smbspool", True);
231 in_client = True; /* Make sure that we tell lp_load we are */
235 if (!lp_load(get_dyn_CONFIGFILE(), True, False, False, True))
237 fprintf(stderr, "ERROR: Can't load %s - run testparm to debug it\n", get_dyn_CONFIGFILE());
241 if (workgroup == NULL)
242 workgroup = lp_workgroup();
248 if ((cli = smb_connect(workgroup, server, port, printer, username, password, argv[2])) == NULL)
250 if (getenv("CLASS") == NULL)
252 fprintf(stderr, "ERROR: Unable to connect to CIFS host, will retry in 60 seconds...\n");
253 sleep (60); /* should just waiting and retrying fix authentication ??? */
258 fprintf(stderr, "ERROR: Unable to connect to CIFS host, trying next printer...\n");
263 while ((cli == NULL) && (tries < MAX_RETRY_CONNECT));
266 fprintf(stderr, "ERROR: Unable to connect to CIFS host after (tried %d times)\n", tries);
271 * Now that we are connected to the server, ignore SIGTERM so that we
272 * can finish out any page data the driver sends (e.g. to eject the
273 * current page... Only ignore SIGTERM if we are printing data from
274 * stdin (otherwise you can't cancel raw jobs...)
278 CatchSignal(SIGTERM, SIG_IGN);
284 for (i = 0; i < copies; i ++)
285 if ((status = smb_print(cli, argv[3] /* title */, fp)) != 0)
291 * Return the queue status...
302 * 'list_devices()' - List the available printers seen on the network...
309 * Eventually, search the local workgroup for available hosts and printers.
312 puts("network smb \"Unknown\" \"Windows Printer via SAMBA\"");
317 * get the name of the newest ticket cache for the uid user.
318 * pam_krb5 defines a non default ticket cache for each user
321 char * get_ticket_cache( uid_t uid )
323 char *ticket_file = NULL;
324 SMB_STRUCT_DIR *tcdir; /* directory where ticket caches are stored */
325 SMB_STRUCT_DIRENT *dirent; /* directory entry */
326 char *filename = NULL; /* holds file names on the tmp directory */
328 char user_cache_prefix[CC_MAX_FILE_LEN];
329 char file_path[CC_MAX_FILE_PATH_LEN];
332 snprintf(user_cache_prefix, CC_MAX_FILE_LEN, "%s%d", CC_PREFIX, uid );
333 tcdir = sys_opendir( TICKET_CC_DIR );
337 while ( (dirent = sys_readdir( tcdir ) ) )
339 filename = dirent->d_name;
340 snprintf(file_path, CC_MAX_FILE_PATH_LEN,"%s/%s", TICKET_CC_DIR, filename);
341 if (sys_stat(file_path, &buf) == 0 )
343 if ( ( buf.st_uid == uid ) && ( S_ISREG(buf.st_mode) ) )
346 * check the user id of the file to prevent denial of
347 * service attacks by creating fake ticket caches for the
350 if ( strstr( filename, user_cache_prefix ) )
352 if ( buf.st_mtime > t )
355 * a newer ticket cache found
358 ticket_file=SMB_STRDUP(file_path);
368 if ( ticket_file == NULL )
370 /* no ticket cache found */
371 fprintf(stderr, "ERROR: No ticket cache found for userid=%d\n", uid);
378 static struct cli_state
379 *smb_complete_connection(const char *myname,
382 const char *username,
383 const char *password,
384 const char *workgroup,
388 struct cli_state *cli; /* New connection */
391 /* Start the SMB connection */
392 nt_status = cli_start_connection( &cli, myname, server, NULL, port,
393 Undefined, flags, NULL);
394 if (!NT_STATUS_IS_OK(nt_status))
399 /* We pretty much guarentee password must be valid or a pointer
405 if ( (username) && (*username) &&
406 (strlen(password) == 0 ) &&
407 (cli->use_kerberos) )
409 /* Use kerberos authentication */
414 if ( !(pw = sys_getpwnam(username)) ) {
415 fprintf(stderr,"ERROR Can not get %s uid\n", username);
421 * Get the ticket cache of the user to set KRB5CCNAME env
424 cache_file = get_ticket_cache( pw->pw_uid );
425 if ( cache_file == NULL )
427 fprintf(stderr, "ERROR: Can not get the ticket cache for %s\n", username);
432 if ( setenv(KRB5CCNAME, cache_file, OVERWRITE) < 0 )
434 fprintf(stderr, "ERROR: Can not add KRB5CCNAME to the environment");
442 * Change the UID of the process to be able to read the kerberos
450 if (!NT_STATUS_IS_OK(cli_session_setup(cli, username,
451 password, strlen(password)+1,
452 password, strlen(password)+1,
455 fprintf(stderr,"ERROR: Session setup failed: %s\n", cli_errstr(cli));
456 if (NT_STATUS_V(cli_nt_error(cli)) ==
457 NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED))
459 fprintf(stderr, "did you forget to run kinit?\n");
466 if (!cli_send_tconX(cli, share, "?????", password, strlen(password)+1))
468 fprintf(stderr, "ERROR: Tree connect failed (%s)\n", cli_errstr(cli));
474 /* Need to work out how to specify this on the URL. */
477 if (!cli_cm_force_encryption(cli,
483 fprintf(stderr, "ERROR: encryption setup failed\n");
494 * 'smb_connect()' - Return a connection to a server.
497 static struct cli_state * /* O - SMB connection */
498 smb_connect(const char *workgroup, /* I - Workgroup */
499 const char *server, /* I - Server */
500 const int port, /* I - Port */
501 const char *share, /* I - Printer */
502 const char *username, /* I - Username */
503 const char *password, /* I - Password */
504 const char *jobusername) /* I - User who issued the print job */
506 struct cli_state *cli; /* New connection */
507 char *myname = NULL; /* Client name */
511 * Get the names and addresses of the client and server...
514 myname = get_myname(talloc_tos());
519 /* See if we have a username first. This is for backwards compatible
520 behavior with 3.0.14a */
522 if ( username && *username )
524 cli = smb_complete_connection(myname, server, port, username,
525 password, workgroup, share, 0 );
531 * Try to use the user kerberos credentials (if any) to authenticate
533 cli = smb_complete_connection(myname, server, port, jobusername, "",
535 CLI_FULL_CONNECTION_USE_KERBEROS );
537 if (cli ) { return cli; }
539 /* give a chance for a passwordless NTLMSSP session setup */
541 pwd = getpwuid(geteuid());
546 cli = smb_complete_connection(myname, server, port, pwd->pw_name, "",
547 workgroup, share, 0);
549 if (cli) { return cli; }
552 * last try. Use anonymous authentication
555 cli = smb_complete_connection(myname, server, port, "", "",
556 workgroup, share, 0);
558 * Return the new connection...
566 * 'smb_print()' - Queue a job for printing using the SMB protocol.
569 static int /* O - 0 = success, non-0 = failure */
570 smb_print(struct cli_state *cli, /* I - SMB connection */
571 char *title, /* I - Title/job name */
572 FILE *fp) /* I - File to print */
574 int fnum; /* File number */
575 int nbytes, /* Number of bytes read */
576 tbytes; /* Total bytes read */
577 char buffer[8192], /* Buffer for copy */
578 *ptr; /* Pointer into tile */
582 * Sanitize the title...
585 for (ptr = title; *ptr; ptr ++)
586 if (!isalnum((int)*ptr) && !isspace((int)*ptr))
590 * Open the printer device...
593 if ((fnum = cli_open(cli, title, O_RDWR | O_CREAT | O_TRUNC, DENY_NONE)) == -1)
595 fprintf(stderr, "ERROR: %s opening remote spool %s\n",
596 cli_errstr(cli), title);
601 * Copy the file to the printer...
609 while ((nbytes = fread(buffer, 1, sizeof(buffer), fp)) > 0)
611 if (cli_write(cli, fnum, 0, buffer, tbytes, nbytes) != nbytes)
613 fprintf(stderr, "ERROR: Error writing spool: %s\n", cli_errstr(cli));
620 if (!cli_close(cli, fnum))
622 fprintf(stderr, "ERROR: %s closing remote spool %s\n",
623 cli_errstr(cli), title);
630 static char *uri_unescape_alloc(const char *uritok)
634 ret = (char *)SMB_STRDUP(uritok);
635 if (!ret) return NULL;
637 rfc1738_unescape(ret);