source3/printing/printspoolss.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Printing routines that bridge to spoolss
   4    Copyright (C) Simo Sorce 2010
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "system/filesys.h"
  22 #include "printing.h"
  23 #include "rpc_client/rpc_client.h"
  24 #include "../librpc/gen_ndr/ndr_spoolss_c.h"
  25 #include "rpc_server/rpc_ncacn_np.h"
  26 #include "smbd/globals.h"
  27 #include "../libcli/security/security.h"
  28
  29 struct print_file_data {
  30         char *svcname;
  31         char *docname;
  32         char *filename;
  33         struct policy_handle handle;
  34         uint32_t jobid;
  35         uint16_t rap_jobid;
  36 };
  37
  38 uint16_t print_spool_rap_jobid(struct print_file_data *print_file)
  39 {
  40         if (print_file == NULL) {
  41                 return 0;
  42         }
  43
  44         return print_file->rap_jobid;
  45 }
  46
  47 void print_spool_terminate(struct connection_struct *conn,
  48                            struct print_file_data *print_file);
  49
  50 /***************************************************************************
  51  * Open a Document over spoolss
  52  ***************************************************************************/
  53
  54 #define DOCNAME_DEFAULT "Remote Downlevel Document"
  55
  56 NTSTATUS print_spool_open(files_struct *fsp,
  57                           const char *fname,
  58                           uint64_t current_vuid)
  59 {
  60         const struct loadparm_substitution *lp_sub =
  61                 loadparm_s3_global_substitution();
  62         NTSTATUS status;
  63         TALLOC_CTX *tmp_ctx;
  64         struct print_file_data *pf;
  65         struct dcerpc_binding_handle *b = NULL;
  66         struct spoolss_DevmodeContainer devmode_ctr;
  67         struct spoolss_DocumentInfoCtr info_ctr;
  68         struct spoolss_DocumentInfo1 *info1;
  69         int fd = -1;
  70         WERROR werr;
  71         mode_t mask;
  72
  73         tmp_ctx = talloc_new(fsp);
  74         if (!tmp_ctx) {
  75                 return NT_STATUS_NO_MEMORY;
  76         }
  77
  78         pf = talloc_zero(fsp, struct print_file_data);
  79         if (!pf) {
  80                 status = NT_STATUS_NO_MEMORY;
  81                 goto done;
  82         }
  83         pf->svcname = lp_servicename(pf, lp_sub, SNUM(fsp->conn));
  84
  85         /* the document name is derived from the file name.
  86          * "Remote Downlevel Document" is added in front to
  87          * mimic what windows does in this case */
  88         pf->docname = talloc_strdup(pf, DOCNAME_DEFAULT);
  89         if (!pf->docname) {
  90                 status = NT_STATUS_NO_MEMORY;
  91                 goto done;
  92         }
  93         if (fname) {
  94                 const char *p = strrchr(fname, '/');
  95                 if (!p) {
  96                         p = fname;
  97                 }
  98                 pf->docname = talloc_asprintf_append(pf->docname, " %s", p);
  99                 if (!pf->docname) {
 100                         status = NT_STATUS_NO_MEMORY;
 101                         goto done;
 102                 }
 103         }
 104
 105         /*
 106          * Ok, now we have to open an actual file.
 107          * Here is the reason:
 108          * We want to write the spool job to this file in
 109          * smbd for scalability reason (and also because
 110          * apparently window printer drivers can seek when
 111          * spooling to a file).
 112          * So we first create a file, and then we pass it
 113          * to spoolss in output_file so it can monitor and
 114          * take over once we call EndDocPrinter().
 115          * Of course we will not start writing until
 116          * StartDocPrinter() actually gives the ok.
 117          * smbd spooler files do not include a print jobid
 118          * path component, as the jobid is only known after
 119          * calling StartDocPrinter().
 120          */
 121
 122         pf->filename = talloc_asprintf(pf, "%s/%sXXXXXX",
 123                                         lp_path(talloc_tos(),
 124                                                 lp_sub,
 125                                                 SNUM(fsp->conn)),
 126                                         PRINT_SPOOL_PREFIX);
 127         if (!pf->filename) {
 128                 status = NT_STATUS_NO_MEMORY;
 129                 goto done;
 130         }
 131         errno = 0;
 132         mask = umask(S_IRWXO | S_IRWXG);
 133         fd = mkstemp(pf->filename);
 134         umask(mask);
 135         if (fd == -1) {
 136                 if (errno == EACCES) {
 137                         /* Common setup error, force a report. */
 138                         DEBUG(0, ("Insufficient permissions "
 139                                   "to open spool file %s.\n",
 140                                   pf->filename));
 141                 } else {
 142                         /* Normal case, report at level 3 and above. */
 143                         DEBUG(3, ("can't open spool file %s,\n",
 144                                   pf->filename));
 145                         DEBUGADD(3, ("errno = %d (%s).\n",
 146                                      errno, strerror(errno)));
 147                 }
 148                 status = map_nt_error_from_unix(errno);
 149                 goto done;
 150         }
 151
 152         /* now open a document over spoolss so that it does
 153          * all printer verification, and eventually assigns
 154          * a job id */
 155
 156         status = rpc_pipe_open_interface(fsp->conn,
 157                                          &ndr_table_spoolss,
 158                                          fsp->conn->session_info,
 159                                          fsp->conn->sconn->remote_address,
 160                                          fsp->conn->sconn->local_address,
 161                                          fsp->conn->sconn->msg_ctx,
 162                                          &fsp->conn->spoolss_pipe);
 163         if (!NT_STATUS_IS_OK(status)) {
 164                 goto done;
 165         }
 166         b = fsp->conn->spoolss_pipe->binding_handle;
 167
 168         ZERO_STRUCT(devmode_ctr);
 169
 170         status = dcerpc_spoolss_OpenPrinter(b, pf, pf->svcname,
 171                                             "RAW", devmode_ctr,
 172                                             PRINTER_ACCESS_USE,
 173                                             &pf->handle, &werr);
 174         if (!NT_STATUS_IS_OK(status)) {
 175                 goto done;
 176         }
 177         if (!W_ERROR_IS_OK(werr)) {
 178                 status = werror_to_ntstatus(werr);
 179                 goto done;
 180         }
 181
 182         info1 = talloc(tmp_ctx, struct spoolss_DocumentInfo1);
 183         if (info1 == NULL) {
 184                 status = NT_STATUS_NO_MEMORY;
 185                 goto done;
 186         }
 187         info1->document_name = pf->docname;
 188         info1->output_file = pf->filename;
 189         info1->datatype = "RAW";
 190
 191         info_ctr.level = 1;
 192         info_ctr.info.info1 = info1;
 193
 194         status = dcerpc_spoolss_StartDocPrinter(b, tmp_ctx,
 195                                                 &pf->handle,
 196                                                 &info_ctr,
 197                                                 &pf->jobid,
 198                                                 &werr);
 199         if (!NT_STATUS_IS_OK(status)) {
 200                 goto done;
 201         }
 202         if (!W_ERROR_IS_OK(werr)) {
 203                 status = werror_to_ntstatus(werr);
 204                 goto done;
 205         }
 206
 207         /* Convert to RAP id. */
 208         pf->rap_jobid = pjobid_to_rap(pf->svcname, pf->jobid);
 209         if (pf->rap_jobid == 0) {
 210                 /* No errno around here */
 211                 status = NT_STATUS_ACCESS_DENIED;
 212                 goto done;
 213         }
 214
 215         /* setup a full fsp */
 216         fsp->fsp_name = synthetic_smb_fname(fsp, pf->filename, NULL, NULL, 0);
 217         if (fsp->fsp_name == NULL) {
 218                 status = NT_STATUS_NO_MEMORY;
 219                 goto done;
 220         }
 221
 222         if (sys_fstat(fd, &fsp->fsp_name->st, false) != 0) {
 223                 status = map_nt_error_from_unix(errno);
 224                 goto done;
 225         }
 226
 227         fsp->file_id = vfs_file_id_from_sbuf(fsp->conn, &fsp->fsp_name->st);
 228         fsp->fh->fd = fd;
 229
 230         fsp->vuid = current_vuid;
 231         fsp->fsp_flags.can_lock = false;
 232         fsp->fsp_flags.can_read = false;
 233         fsp->access_mask = FILE_GENERIC_WRITE;
 234         fsp->fsp_flags.can_write = true;
 235         fsp->fsp_flags.modified = false;
 236         fsp->oplock_type = NO_OPLOCK;
 237         fsp->sent_oplock_break = NO_BREAK_SENT;
 238         fsp->fsp_flags.is_directory = false;
 239
 240         fsp->print_file = pf;
 241
 242         status = NT_STATUS_OK;
 243 done:
 244         if (!NT_STATUS_IS_OK(status)) {
 245                 if (fd != -1) {
 246                         close(fd);
 247                         if (fsp->print_file) {
 248                                 unlink(fsp->print_file->filename);
 249                         }
 250                 }
 251                 /* We need to delete the job from spoolss too */
 252                 if (pf && pf->jobid) {
 253                         print_spool_terminate(fsp->conn, pf);
 254                 }
 255         }
 256         talloc_free(tmp_ctx);
 257         return status;
 258 }
 259
 260 int print_spool_write(files_struct *fsp,
 261                       const char *data, uint32_t size,
 262                       off_t offset, uint32_t *written)
 263 {
 264         SMB_STRUCT_STAT st;
 265         ssize_t n;
 266         int ret;
 267
 268         *written = 0;
 269
 270         /* first of all stat file to find out if it is still there.
 271          * spoolss may have deleted it to signal someone has killed
 272          * the job through it's interface */
 273
 274         if (sys_fstat(fsp->fh->fd, &st, false) != 0) {
 275                 ret = errno;
 276                 DEBUG(3, ("printfile_offset: sys_fstat failed on %s (%s)\n",
 277                           fsp_str_dbg(fsp), strerror(ret)));
 278                 return ret;
 279         }
 280
 281         /* check if the file is unlinked, this will signal spoolss has
 282          * killed it, just return an error and close the file */
 283         if (st.st_ex_nlink == 0) {
 284                 close(fsp->fh->fd);
 285                 return EBADF;
 286         }
 287
 288         /* When print files go beyond 4GB, the 32-bit offset sent in
 289          * old SMBwrite calls is relative to the current 4GB chunk
 290          * we're writing to.
 291          *    Discovered by Sebastian Kloska <oncaphillis@snafu.de>.
 292          */
 293         if (offset < 0xffffffff00000000LL) {
 294                 offset = (st.st_ex_size & 0xffffffff00000000LL) + offset;
 295         }
 296
 297         n = write_data_at_offset(fsp->fh->fd, data, size, offset);
 298         if (n == -1) {
 299                 ret = errno;
 300                 print_spool_terminate(fsp->conn, fsp->print_file);
 301         } else {
 302                 *written = n;
 303                 ret = 0;
 304         }
 305
 306         return ret;
 307 }
 308
 309 void print_spool_end(files_struct *fsp, enum file_close_type close_type)
 310 {
 311         NTSTATUS status;
 312         WERROR werr;
 313         struct dcerpc_binding_handle *b = NULL;
 314
 315         if (fsp->fh->private_options &
 316             NTCREATEX_OPTIONS_PRIVATE_DELETE_ON_CLOSE) {
 317                 int ret;
 318
 319                 /*
 320                  * Job was requested to be cancelled by setting
 321                  * delete on close so truncate the job file.
 322                  * print_job_end() which is called from
 323                  * _spoolss_EndDocPrinter() will take
 324                  * care of deleting it for us.
 325                  */
 326                 ret = ftruncate(fsp->fh->fd, 0);
 327                 if (ret == -1) {
 328                         DBG_ERR("ftruncate failed: %s\n", strerror(errno));
 329                 }
 330         }
 331
 332         b = fsp->conn->spoolss_pipe->binding_handle;
 333
 334         switch (close_type) {
 335         case NORMAL_CLOSE:
 336         case SHUTDOWN_CLOSE:
 337                 /* this also automatically calls spoolss_EndDocPrinter */
 338                 status = dcerpc_spoolss_ClosePrinter(b, fsp->print_file,
 339                                                 &fsp->print_file->handle,
 340                                                 &werr);
 341                 if (!NT_STATUS_IS_OK(status) ||
 342                     !NT_STATUS_IS_OK(status = werror_to_ntstatus(werr))) {
 343                         DEBUG(3, ("Failed to close printer %s [%s]\n",
 344                               fsp->print_file->svcname, nt_errstr(status)));
 345                 }
 346                 break;
 347         case ERROR_CLOSE:
 348                 print_spool_terminate(fsp->conn, fsp->print_file);
 349                 break;
 350         }
 351 }
 352
 353
 354 void print_spool_terminate(struct connection_struct *conn,
 355                            struct print_file_data *print_file)
 356 {
 357         NTSTATUS status;
 358         WERROR werr;
 359         struct dcerpc_binding_handle *b = NULL;
 360
 361         rap_jobid_delete(print_file->svcname, print_file->jobid);
 362
 363         status = rpc_pipe_open_interface(conn,
 364                                          &ndr_table_spoolss,
 365                                          conn->session_info,
 366                                          conn->sconn->remote_address,
 367                                          conn->sconn->local_address,
 368                                          conn->sconn->msg_ctx,
 369                                          &conn->spoolss_pipe);
 370         if (!NT_STATUS_IS_OK(status)) {
 371                 DEBUG(0, ("print_spool_terminate: "
 372                           "Failed to get spoolss pipe [%s]\n",
 373                           nt_errstr(status)));
 374                 return;
 375         }
 376         b = conn->spoolss_pipe->binding_handle;
 377
 378         status = dcerpc_spoolss_SetJob(b, print_file,
 379                                         &print_file->handle,
 380                                         print_file->jobid,
 381                                         NULL, SPOOLSS_JOB_CONTROL_DELETE,
 382                                         &werr);
 383         if (!NT_STATUS_IS_OK(status) ||
 384             !NT_STATUS_IS_OK(status = werror_to_ntstatus(werr))) {
 385                 DEBUG(3, ("Failed to delete job %d [%s]\n",
 386                           print_file->jobid, nt_errstr(status)));
 387                 return;
 388         }
 389         status = dcerpc_spoolss_ClosePrinter(b, print_file,
 390                                              &print_file->handle,
 391                                              &werr);
 392         if (!NT_STATUS_IS_OK(status) ||
 393             !NT_STATUS_IS_OK(status = werror_to_ntstatus(werr))) {
 394                 DEBUG(3, ("Failed to close printer %s [%s]\n",
 395                           print_file->svcname, nt_errstr(status)));
 396                 return;
 397         }
 398 }