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         NTSTATUS status;
  61         TALLOC_CTX *tmp_ctx;
  62         struct print_file_data *pf;
  63         struct dcerpc_binding_handle *b = NULL;
  64         struct spoolss_DevmodeContainer devmode_ctr;
  65         struct spoolss_DocumentInfoCtr info_ctr;
  66         struct spoolss_DocumentInfo1 *info1;
  67         int fd = -1;
  68         WERROR werr;
  69         mode_t mask;
  70
  71         tmp_ctx = talloc_new(fsp);
  72         if (!tmp_ctx) {
  73                 return NT_STATUS_NO_MEMORY;
  74         }
  75
  76         pf = talloc_zero(fsp, struct print_file_data);
  77         if (!pf) {
  78                 status = NT_STATUS_NO_MEMORY;
  79                 goto done;
  80         }
  81         pf->svcname = lp_servicename(pf, SNUM(fsp->conn));
  82
  83         /* the document name is derived from the file name.
  84          * "Remote Downlevel Document" is added in front to
  85          * mimic what windows does in this case */
  86         pf->docname = talloc_strdup(pf, DOCNAME_DEFAULT);
  87         if (!pf->docname) {
  88                 status = NT_STATUS_NO_MEMORY;
  89                 goto done;
  90         }
  91         if (fname) {
  92                 const char *p = strrchr(fname, '/');
  93                 if (!p) {
  94                         p = fname;
  95                 }
  96                 pf->docname = talloc_asprintf_append(pf->docname, " %s", p);
  97                 if (!pf->docname) {
  98                         status = NT_STATUS_NO_MEMORY;
  99                         goto done;
 100                 }
 101         }
 102
 103         /*
 104          * Ok, now we have to open an actual file.
 105          * Here is the reason:
 106          * We want to write the spool job to this file in
 107          * smbd for scalability reason (and also because
 108          * apparently window printer drivers can seek when
 109          * spooling to a file).
 110          * So we first create a file, and then we pass it
 111          * to spoolss in output_file so it can monitor and
 112          * take over once we call EndDocPrinter().
 113          * Of course we will not start writing until
 114          * StartDocPrinter() actually gives the ok.
 115          * smbd spooler files do not include a print jobid
 116          * path component, as the jobid is only known after
 117          * calling StartDocPrinter().
 118          */
 119
 120         pf->filename = talloc_asprintf(pf, "%s/%sXXXXXX",
 121                                         lp_path(talloc_tos(),
 122                                                 SNUM(fsp->conn)),
 123                                         PRINT_SPOOL_PREFIX);
 124         if (!pf->filename) {
 125                 status = NT_STATUS_NO_MEMORY;
 126                 goto done;
 127         }
 128         errno = 0;
 129         mask = umask(S_IRWXO | S_IRWXG);
 130         fd = mkstemp(pf->filename);
 131         umask(mask);
 132         if (fd == -1) {
 133                 if (errno == EACCES) {
 134                         /* Common setup error, force a report. */
 135                         DEBUG(0, ("Insufficient permissions "
 136                                   "to open spool file %s.\n",
 137                                   pf->filename));
 138                 } else {
 139                         /* Normal case, report at level 3 and above. */
 140                         DEBUG(3, ("can't open spool file %s,\n",
 141                                   pf->filename));
 142                         DEBUGADD(3, ("errno = %d (%s).\n",
 143                                      errno, strerror(errno)));
 144                 }
 145                 status = map_nt_error_from_unix(errno);
 146                 goto done;
 147         }
 148
 149         /* now open a document over spoolss so that it does
 150          * all printer verification, and eventually assigns
 151          * a job id */
 152
 153         status = rpc_pipe_open_interface(fsp->conn,
 154                                          &ndr_table_spoolss,
 155                                          fsp->conn->session_info,
 156                                          fsp->conn->sconn->remote_address,
 157                                          fsp->conn->sconn->local_address,
 158                                          fsp->conn->sconn->msg_ctx,
 159                                          &fsp->conn->spoolss_pipe);
 160         if (!NT_STATUS_IS_OK(status)) {
 161                 goto done;
 162         }
 163         b = fsp->conn->spoolss_pipe->binding_handle;
 164
 165         ZERO_STRUCT(devmode_ctr);
 166
 167         status = dcerpc_spoolss_OpenPrinter(b, pf, pf->svcname,
 168                                             "RAW", devmode_ctr,
 169                                             PRINTER_ACCESS_USE,
 170                                             &pf->handle, &werr);
 171         if (!NT_STATUS_IS_OK(status)) {
 172                 goto done;
 173         }
 174         if (!W_ERROR_IS_OK(werr)) {
 175                 status = werror_to_ntstatus(werr);
 176                 goto done;
 177         }
 178
 179         info1 = talloc(tmp_ctx, struct spoolss_DocumentInfo1);
 180         if (info1 == NULL) {
 181                 status = NT_STATUS_NO_MEMORY;
 182                 goto done;
 183         }
 184         info1->document_name = pf->docname;
 185         info1->output_file = pf->filename;
 186         info1->datatype = "RAW";
 187
 188         info_ctr.level = 1;
 189         info_ctr.info.info1 = info1;
 190
 191         status = dcerpc_spoolss_StartDocPrinter(b, tmp_ctx,
 192                                                 &pf->handle,
 193                                                 &info_ctr,
 194                                                 &pf->jobid,
 195                                                 &werr);
 196         if (!NT_STATUS_IS_OK(status)) {
 197                 goto done;
 198         }
 199         if (!W_ERROR_IS_OK(werr)) {
 200                 status = werror_to_ntstatus(werr);
 201                 goto done;
 202         }
 203
 204         /* Convert to RAP id. */
 205         pf->rap_jobid = pjobid_to_rap(pf->svcname, pf->jobid);
 206         if (pf->rap_jobid == 0) {
 207                 /* No errno around here */
 208                 status = NT_STATUS_ACCESS_DENIED;
 209                 goto done;
 210         }
 211
 212         /* setup a full fsp */
 213         fsp->fsp_name = synthetic_smb_fname(fsp, pf->filename, NULL, NULL, 0);
 214         if (fsp->fsp_name == NULL) {
 215                 status = NT_STATUS_NO_MEMORY;
 216                 goto done;
 217         }
 218
 219         if (sys_fstat(fd, &fsp->fsp_name->st, false) != 0) {
 220                 status = map_nt_error_from_unix(errno);
 221                 goto done;
 222         }
 223
 224         fsp->file_id = vfs_file_id_from_sbuf(fsp->conn, &fsp->fsp_name->st);
 225         fsp->fh->fd = fd;
 226
 227         fsp->vuid = current_vuid;
 228         fsp->can_lock = false;
 229         fsp->can_read = false;
 230         fsp->access_mask = FILE_GENERIC_WRITE;
 231         fsp->can_write = true;
 232         fsp->modified = false;
 233         fsp->oplock_type = NO_OPLOCK;
 234         fsp->sent_oplock_break = NO_BREAK_SENT;
 235         fsp->is_directory = false;
 236
 237         fsp->print_file = pf;
 238
 239         status = NT_STATUS_OK;
 240 done:
 241         if (!NT_STATUS_IS_OK(status)) {
 242                 if (fd != -1) {
 243                         close(fd);
 244                         if (fsp->print_file) {
 245                                 unlink(fsp->print_file->filename);
 246                         }
 247                 }
 248                 /* We need to delete the job from spoolss too */
 249                 if (pf && pf->jobid) {
 250                         print_spool_terminate(fsp->conn, pf);
 251                 }
 252         }
 253         talloc_free(tmp_ctx);
 254         return status;
 255 }
 256
 257 int print_spool_write(files_struct *fsp,
 258                       const char *data, uint32_t size,
 259                       off_t offset, uint32_t *written)
 260 {
 261         SMB_STRUCT_STAT st;
 262         ssize_t n;
 263         int ret;
 264
 265         *written = 0;
 266
 267         /* first of all stat file to find out if it is still there.
 268          * spoolss may have deleted it to signal someone has killed
 269          * the job through it's interface */
 270
 271         if (sys_fstat(fsp->fh->fd, &st, false) != 0) {
 272                 ret = errno;
 273                 DEBUG(3, ("printfile_offset: sys_fstat failed on %s (%s)\n",
 274                           fsp_str_dbg(fsp), strerror(ret)));
 275                 return ret;
 276         }
 277
 278         /* check if the file is unlinked, this will signal spoolss has
 279          * killed it, just return an error and close the file */
 280         if (st.st_ex_nlink == 0) {
 281                 close(fsp->fh->fd);
 282                 return EBADF;
 283         }
 284
 285         /* When print files go beyond 4GB, the 32-bit offset sent in
 286          * old SMBwrite calls is relative to the current 4GB chunk
 287          * we're writing to.
 288          *    Discovered by Sebastian Kloska <oncaphillis@snafu.de>.
 289          */
 290         if (offset < 0xffffffff00000000LL) {
 291                 offset = (st.st_ex_size & 0xffffffff00000000LL) + offset;
 292         }
 293
 294         n = write_data_at_offset(fsp->fh->fd, data, size, offset);
 295         if (n == -1) {
 296                 ret = errno;
 297                 print_spool_terminate(fsp->conn, fsp->print_file);
 298         } else {
 299                 *written = n;
 300                 ret = 0;
 301         }
 302
 303         return ret;
 304 }
 305
 306 void print_spool_end(files_struct *fsp, enum file_close_type close_type)
 307 {
 308         NTSTATUS status;
 309         WERROR werr;
 310         struct dcerpc_binding_handle *b = NULL;
 311
 312         b = fsp->conn->spoolss_pipe->binding_handle;
 313
 314         switch (close_type) {
 315         case NORMAL_CLOSE:
 316         case SHUTDOWN_CLOSE:
 317                 /* this also automatically calls spoolss_EndDocPrinter */
 318                 status = dcerpc_spoolss_ClosePrinter(b, fsp->print_file,
 319                                                 &fsp->print_file->handle,
 320                                                 &werr);
 321                 if (!NT_STATUS_IS_OK(status) ||
 322                     !NT_STATUS_IS_OK(status = werror_to_ntstatus(werr))) {
 323                         DEBUG(3, ("Failed to close printer %s [%s]\n",
 324                               fsp->print_file->svcname, nt_errstr(status)));
 325                 }
 326                 break;
 327         case ERROR_CLOSE:
 328                 print_spool_terminate(fsp->conn, fsp->print_file);
 329                 break;
 330         }
 331 }
 332
 333
 334 void print_spool_terminate(struct connection_struct *conn,
 335                            struct print_file_data *print_file)
 336 {
 337         NTSTATUS status;
 338         WERROR werr;
 339         struct dcerpc_binding_handle *b = NULL;
 340
 341         rap_jobid_delete(print_file->svcname, print_file->jobid);
 342
 343         status = rpc_pipe_open_interface(conn,
 344                                          &ndr_table_spoolss,
 345                                          conn->session_info,
 346                                          conn->sconn->remote_address,
 347                                          conn->sconn->local_address,
 348                                          conn->sconn->msg_ctx,
 349                                          &conn->spoolss_pipe);
 350         if (!NT_STATUS_IS_OK(status)) {
 351                 DEBUG(0, ("print_spool_terminate: "
 352                           "Failed to get spoolss pipe [%s]\n",
 353                           nt_errstr(status)));
 354                 return;
 355         }
 356         b = conn->spoolss_pipe->binding_handle;
 357
 358         status = dcerpc_spoolss_SetJob(b, print_file,
 359                                         &print_file->handle,
 360                                         print_file->jobid,
 361                                         NULL, SPOOLSS_JOB_CONTROL_DELETE,
 362                                         &werr);
 363         if (!NT_STATUS_IS_OK(status) ||
 364             !NT_STATUS_IS_OK(status = werror_to_ntstatus(werr))) {
 365                 DEBUG(3, ("Failed to delete job %d [%s]\n",
 366                           print_file->jobid, nt_errstr(status)));
 367                 return;
 368         }
 369         status = dcerpc_spoolss_ClosePrinter(b, print_file,
 370                                              &print_file->handle,
 371                                              &werr);
 372         if (!NT_STATUS_IS_OK(status) ||
 373             !NT_STATUS_IS_OK(status = werror_to_ntstatus(werr))) {
 374                 DEBUG(3, ("Failed to close printer %s [%s]\n",
 375                           print_file->svcname, nt_errstr(status)));
 376                 return;
 377         }
 378 }