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 "printing.h"
  22 #include "rpc_client/rpc_client.h"
  23 #include "../librpc/gen_ndr/ndr_spoolss_c.h"
  24 #include "rpc_server/rpc_ncacn_np.h"
  25 #include "smbd/globals.h"
  26 #include "../libcli/security/security.h"
  27
  28 struct print_file_data {
  29         char *svcname;
  30         char *docname;
  31         char *filename;
  32         struct policy_handle handle;
  33         uint32_t jobid;
  34         uint16 rap_jobid;
  35 };
  36
  37 uint16_t print_spool_rap_jobid(struct print_file_data *print_file)
  38 {
  39         if (print_file == NULL) {
  40                 return 0;
  41         }
  42
  43         return print_file->rap_jobid;
  44 }
  45
  46 void print_spool_terminate(struct connection_struct *conn,
  47                            struct print_file_data *print_file);
  48
  49 /***************************************************************************
  50  * Open a Document over spoolss
  51  ***************************************************************************/
  52
  53 #define DOCNAME_DEFAULT "Remote Downlevel Document"
  54 #ifndef PRINT_SPOOL_PREFIX
  55 #define PRINT_SPOOL_PREFIX "smbprn."
  56 #endif
  57
  58 NTSTATUS print_spool_open(files_struct *fsp,
  59                           const char *fname,
  60                           uint64_t current_vuid)
  61 {
  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
  72         tmp_ctx = talloc_new(fsp);
  73         if (!tmp_ctx) {
  74                 return NT_STATUS_NO_MEMORY;
  75         }
  76
  77         pf = talloc_zero(fsp, struct print_file_data);
  78         if (!pf) {
  79                 status = NT_STATUS_NO_MEMORY;
  80                 goto done;
  81         }
  82         pf->svcname = lp_servicename(pf, SNUM(fsp->conn));
  83
  84         /* the document name is derived from the file name.
  85          * "Remote Downlevel Document" is added in front to
  86          * mimic what windows does in this case */
  87         pf->docname = talloc_strdup(pf, DOCNAME_DEFAULT);
  88         if (!pf->docname) {
  89                 status = NT_STATUS_NO_MEMORY;
  90                 goto done;
  91         }
  92         if (fname) {
  93                 const char *p = strrchr(fname, '/');
  94                 if (!p) {
  95                         p = fname;
  96                 }
  97                 pf->docname = talloc_asprintf_append(pf->docname, " %s", p);
  98                 if (!pf->docname) {
  99                         status = NT_STATUS_NO_MEMORY;
 100                         goto done;
 101                 }
 102         }
 103
 104         /*
 105          * Ok, now we have to open an actual file.
 106          * Here is the reason:
 107          * We want to write the spool job to this file in
 108          * smbd for scalability reason (and also because
 109          * apparently window printer drivers can seek when
 110          * spooling to a file).
 111          * So we first create a file, and then we pass it
 112          * to spoolss in output_file so it can monitor and
 113          * take over once we call EndDocPrinter().
 114          * Of course we will not start writing until
 115          * StartDocPrinter() actually gives the ok.
 116          * smbd spooler files do not include a print jobid
 117          * path component, as the jobid is only known after
 118          * calling StartDocPrinter().
 119          */
 120
 121         pf->filename = talloc_asprintf(pf, "%s/%sXXXXXX",
 122                                         lp_pathname(talloc_tos(),
 123                                                     SNUM(fsp->conn)),
 124                                         PRINT_SPOOL_PREFIX);
 125         if (!pf->filename) {
 126                 status = NT_STATUS_NO_MEMORY;
 127                 goto done;
 128         }
 129         errno = 0;
 130         fd = mkstemp(pf->filename);
 131         if (fd == -1) {
 132                 if (errno == EACCES) {
 133                         /* Common setup error, force a report. */
 134                         DEBUG(0, ("Insufficient permissions "
 135                                   "to open spool file %s.\n",
 136                                   pf->filename));
 137                 } else {
 138                         /* Normal case, report at level 3 and above. */
 139                         DEBUG(3, ("can't open spool file %s,\n",
 140                                   pf->filename));
 141                         DEBUGADD(3, ("errno = %d (%s).\n",
 142                                      errno, strerror(errno)));
 143                 }
 144                 status = map_nt_error_from_unix(errno);
 145                 goto done;
 146         }
 147
 148         /* now open a document over spoolss so that it does
 149          * all printer verification, and eventually assigns
 150          * a job id */
 151
 152         status = rpc_pipe_open_interface(fsp->conn,
 153                                          &ndr_table_spoolss.syntax_id,
 154                                          fsp->conn->session_info,
 155                                          fsp->conn->sconn->remote_address,
 156                                          fsp->conn->sconn->msg_ctx,
 157                                          &fsp->conn->spoolss_pipe);
 158         if (!NT_STATUS_IS_OK(status)) {
 159                 goto done;
 160         }
 161         b = fsp->conn->spoolss_pipe->binding_handle;
 162
 163         ZERO_STRUCT(devmode_ctr);
 164
 165         status = dcerpc_spoolss_OpenPrinter(b, pf, pf->svcname,
 166                                             "RAW", devmode_ctr,
 167                                             PRINTER_ACCESS_USE,
 168                                             &pf->handle, &werr);
 169         if (!NT_STATUS_IS_OK(status)) {
 170                 goto done;
 171         }
 172         if (!W_ERROR_IS_OK(werr)) {
 173                 status = werror_to_ntstatus(werr);
 174                 goto done;
 175         }
 176
 177         info1 = talloc(tmp_ctx, struct spoolss_DocumentInfo1);
 178         if (info1 == NULL) {
 179                 status = NT_STATUS_NO_MEMORY;
 180                 goto done;
 181         }
 182         info1->document_name = pf->docname;
 183         info1->output_file = pf->filename;
 184         info1->datatype = "RAW";
 185
 186         info_ctr.level = 1;
 187         info_ctr.info.info1 = info1;
 188
 189         status = dcerpc_spoolss_StartDocPrinter(b, tmp_ctx,
 190                                                 &pf->handle,
 191                                                 &info_ctr,
 192                                                 &pf->jobid,
 193                                                 &werr);
 194         if (!NT_STATUS_IS_OK(status)) {
 195                 goto done;
 196         }
 197         if (!W_ERROR_IS_OK(werr)) {
 198                 status = werror_to_ntstatus(werr);
 199                 goto done;
 200         }
 201
 202         /* Convert to RAP id. */
 203         pf->rap_jobid = pjobid_to_rap(pf->svcname, pf->jobid);
 204         if (pf->rap_jobid == 0) {
 205                 /* No errno around here */
 206                 status = NT_STATUS_ACCESS_DENIED;
 207                 goto done;
 208         }
 209
 210         /* setup a full fsp */
 211         status = create_synthetic_smb_fname(fsp, pf->filename, NULL,
 212                                             NULL, &fsp->fsp_name);
 213         if (!NT_STATUS_IS_OK(status)) {
 214                 goto done;
 215         }
 216
 217         if (sys_fstat(fd, &fsp->fsp_name->st, false) != 0) {
 218                 status = map_nt_error_from_unix(errno);
 219                 goto done;
 220         }
 221
 222         fsp->file_id = vfs_file_id_from_sbuf(fsp->conn, &fsp->fsp_name->st);
 223         fsp->fh->fd = fd;
 224
 225         fsp->vuid = current_vuid;
 226         fsp->can_lock = false;
 227         fsp->can_read = false;
 228         fsp->access_mask = FILE_GENERIC_WRITE;
 229         fsp->can_write = true;
 230         fsp->modified = false;
 231         fsp->oplock_type = NO_OPLOCK;
 232         fsp->sent_oplock_break = NO_BREAK_SENT;
 233         fsp->is_directory = false;
 234
 235         fsp->print_file = pf;
 236
 237         status = NT_STATUS_OK;
 238 done:
 239         if (!NT_STATUS_IS_OK(status)) {
 240                 if (fd != -1) {
 241                         close(fd);
 242                         if (fsp->print_file) {
 243                                 unlink(fsp->print_file->filename);
 244                         }
 245                 }
 246                 /* We need to delete the job from spoolss too */
 247                 if (pf->jobid) {
 248                         print_spool_terminate(fsp->conn, pf);
 249                 }
 250         }
 251         talloc_free(tmp_ctx);
 252         return status;
 253 }
 254
 255 int print_spool_write(files_struct *fsp,
 256                       const char *data, uint32_t size,
 257                       off_t offset, uint32_t *written)
 258 {
 259         SMB_STRUCT_STAT st;
 260         ssize_t n;
 261         int ret;
 262
 263         *written = 0;
 264
 265         /* first of all stat file to find out if it is still there.
 266          * spoolss may have deleted it to signal someone has killed
 267          * the job through it's interface */
 268
 269         if (sys_fstat(fsp->fh->fd, &st, false) != 0) {
 270                 ret = errno;
 271                 DEBUG(3, ("printfile_offset: sys_fstat failed on %s (%s)\n",
 272                           fsp_str_dbg(fsp), strerror(ret)));
 273                 return ret;
 274         }
 275
 276         /* check if the file is unlinked, this will signal spoolss has
 277          * killed it, just return an error and close the file */
 278         if (st.st_ex_nlink == 0) {
 279                 close(fsp->fh->fd);
 280                 return EBADF;
 281         }
 282
 283         /* When print files go beyond 4GB, the 32-bit offset sent in
 284          * old SMBwrite calls is relative to the current 4GB chunk
 285          * we're writing to.
 286          *    Discovered by Sebastian Kloska <oncaphillis@snafu.de>.
 287          */
 288         if (offset < 0xffffffff00000000LL) {
 289                 offset = (st.st_ex_size & 0xffffffff00000000LL) + offset;
 290         }
 291
 292         n = write_data_at_offset(fsp->fh->fd, data, size, offset);
 293         if (n == -1) {
 294                 ret = errno;
 295                 print_spool_terminate(fsp->conn, fsp->print_file);
 296         } else {
 297                 *written = n;
 298                 ret = 0;
 299         }
 300
 301         return ret;
 302 }
 303
 304 void print_spool_end(files_struct *fsp, enum file_close_type close_type)
 305 {
 306         NTSTATUS status;
 307         WERROR werr;
 308         struct dcerpc_binding_handle *b = NULL;
 309
 310         b = fsp->conn->spoolss_pipe->binding_handle;
 311
 312         switch (close_type) {
 313         case NORMAL_CLOSE:
 314         case SHUTDOWN_CLOSE:
 315                 /* this also automatically calls spoolss_EndDocPrinter */
 316                 status = dcerpc_spoolss_ClosePrinter(b, fsp->print_file,
 317                                                 &fsp->print_file->handle,
 318                                                 &werr);
 319                 if (!NT_STATUS_IS_OK(status) ||
 320                     !NT_STATUS_IS_OK(status = werror_to_ntstatus(werr))) {
 321                         DEBUG(3, ("Failed to close printer %s [%s]\n",
 322                               fsp->print_file->svcname, nt_errstr(status)));
 323                 }
 324                 break;
 325         case ERROR_CLOSE:
 326                 print_spool_terminate(fsp->conn, fsp->print_file);
 327                 break;
 328         }
 329 }
 330
 331
 332 void print_spool_terminate(struct connection_struct *conn,
 333                            struct print_file_data *print_file)
 334 {
 335         NTSTATUS status;
 336         WERROR werr;
 337         struct dcerpc_binding_handle *b = NULL;
 338
 339         rap_jobid_delete(print_file->svcname, print_file->jobid);
 340
 341         status = rpc_pipe_open_interface(conn,
 342                                          &ndr_table_spoolss.syntax_id,
 343                                          conn->session_info,
 344                                          conn->sconn->remote_address,
 345                                          conn->sconn->msg_ctx,
 346                                          &conn->spoolss_pipe);
 347         if (!NT_STATUS_IS_OK(status)) {
 348                 DEBUG(0, ("print_spool_terminate: "
 349                           "Failed to get spoolss pipe [%s]\n",
 350                           nt_errstr(status)));
 351                 return;
 352         }
 353         b = conn->spoolss_pipe->binding_handle;
 354
 355         status = dcerpc_spoolss_SetJob(b, print_file,
 356                                         &print_file->handle,
 357                                         print_file->jobid,
 358                                         NULL, SPOOLSS_JOB_CONTROL_DELETE,
 359                                         &werr);
 360         if (!NT_STATUS_IS_OK(status) ||
 361             !NT_STATUS_IS_OK(status = werror_to_ntstatus(werr))) {
 362                 DEBUG(3, ("Failed to delete job %d [%s]\n",
 363                           print_file->jobid, nt_errstr(status)));
 364                 return;
 365         }
 366         status = dcerpc_spoolss_ClosePrinter(b, print_file,
 367                                              &print_file->handle,
 368                                              &werr);
 369         if (!NT_STATUS_IS_OK(status) ||
 370             !NT_STATUS_IS_OK(status = werror_to_ntstatus(werr))) {
 371                 DEBUG(3, ("Failed to close printer %s [%s]\n",
 372                           print_file->svcname, nt_errstr(status)));
 373                 return;
 374         }
 375 }