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 "../librpc/gen_ndr/cli_spoolss.h"
  23 #include "rpc_server/rpc_ncacn_np.h"
  24 #include "smbd/globals.h"
  25
  26 void print_spool_terminate(struct connection_struct *conn,
  27                            struct print_file_data *print_file);
  28
  29 /***************************************************************************
  30  * Open a Document over spoolss
  31  ***************************************************************************/
  32
  33 #define DOCNAME_DEFAULT "Remote Downlevel Document"
  34 #ifndef PRINT_SPOOL_PREFIX
  35 #define PRINT_SPOOL_PREFIX "smbprn."
  36 #endif
  37
  38 NTSTATUS print_spool_open(files_struct *fsp,
  39                           const char *fname,
  40                           uint16_t current_vuid)
  41 {
  42         NTSTATUS status;
  43         TALLOC_CTX *tmp_ctx;
  44         struct print_file_data *pf;
  45         struct rpc_pipe_client *cli;
  46         struct spoolss_DevmodeContainer devmode_ctr;
  47         union spoolss_DocumentInfo info;
  48         int fd = -1;
  49         WERROR werr;
  50
  51         tmp_ctx = talloc_new(fsp);
  52         if (!tmp_ctx) {
  53                 return NT_STATUS_NO_MEMORY;
  54         }
  55
  56         pf = talloc_zero(fsp, struct print_file_data);
  57         if (!pf) {
  58                 status = NT_STATUS_NO_MEMORY;
  59                 goto done;
  60         }
  61         pf->svcname = talloc_strdup(pf, lp_servicename(SNUM(fsp->conn)));
  62
  63         /* the document name is derived from the file name.
  64          * "Remote Downlevel Document" is added in front to
  65          * mimic what windows does in this case */
  66         pf->docname = talloc_strdup(pf, DOCNAME_DEFAULT);
  67         if (!pf->docname) {
  68                 status = NT_STATUS_NO_MEMORY;
  69                 goto done;
  70         }
  71         if (fname) {
  72                 const char *p = strrchr(fname, '/');
  73                 if (!p) {
  74                         p = fname;
  75                 }
  76                 pf->docname = talloc_asprintf_append(pf->docname, " %s", p);
  77                 if (!pf->docname) {
  78                         status = NT_STATUS_NO_MEMORY;
  79                         goto done;
  80                 }
  81         }
  82
  83         /* Ok, now we have to open an actual file.
  84          * Here is the reason:
  85          * We want to write the spool job to this file in
  86          * smbd for scalability reason (and also because
  87          * apparently window printer drivers can seek when
  88          * spooling to a file).
  89          * So we first create a file, and then we pass it
  90          * to spoolss in output_file so it can monitor and
  91          * take over once we call EndDocPrinter().
  92          * Of course we will not start writing until
  93          * StartDocPrinter() actually gives the ok. */
  94
  95         pf->filename = talloc_asprintf(pf, "%s/%s.XXXXXX",
  96                                         lp_pathname(SNUM(fsp->conn)),
  97                                         PRINT_SPOOL_PREFIX);
  98         if (!pf->filename) {
  99                 status = NT_STATUS_NO_MEMORY;
 100                 goto done;
 101         }
 102         errno = 0;
 103         fd = mkstemp(pf->filename);
 104         if (fd == -1) {
 105                 if (errno == EACCES) {
 106                         /* Common setup error, force a report. */
 107                         DEBUG(0, ("Insufficient permissions "
 108                                   "to open spool file %s.\n",
 109                                   pf->filename));
 110                 } else {
 111                         /* Normal case, report at level 3 and above. */
 112                         DEBUG(3, ("can't open spool file %s,\n",
 113                                   pf->filename));
 114                         DEBUGADD(3, ("errno = %d (%s).\n",
 115                                      errno, strerror(errno)));
 116                 }
 117                 status = map_nt_error_from_unix(errno);
 118                 goto done;
 119         }
 120
 121         /* now open a document over spoolss so that it does
 122          * all printer verification, and eventually assigns
 123          * a job id */
 124
 125         status = rpc_pipe_open_interface(fsp->conn,
 126                                          &ndr_table_spoolss.syntax_id,
 127                                          fsp->conn->server_info,
 128                                          &fsp->conn->sconn->client_id,
 129                                          fsp->conn->sconn->msg_ctx,
 130                                          &fsp->conn->spoolss_pipe);
 131         if (!NT_STATUS_IS_OK(status)) {
 132                 goto done;
 133         }
 134         cli = fsp->conn->spoolss_pipe;
 135
 136         ZERO_STRUCT(devmode_ctr);
 137
 138         status = rpccli_spoolss_OpenPrinter(cli, pf, pf->svcname,
 139                                             "RAW", devmode_ctr,
 140                                             SEC_FLAG_MAXIMUM_ALLOWED,
 141                                             &pf->handle, &werr);
 142         if (!NT_STATUS_IS_OK(status)) {
 143                 goto done;
 144         }
 145         if (!W_ERROR_IS_OK(werr)) {
 146                 status = werror_to_ntstatus(werr);
 147                 goto done;
 148         }
 149
 150         info.info1 = talloc(tmp_ctx, struct spoolss_DocumentInfo1);
 151         if (!info.info1) {
 152                 status = NT_STATUS_NO_MEMORY;
 153                 goto done;
 154         }
 155         info.info1->document_name = pf->docname;
 156         info.info1->output_file = pf->filename;
 157         info.info1->datatype = "RAW";
 158
 159         status = rpccli_spoolss_StartDocPrinter(cli, tmp_ctx, &pf->handle,
 160                                                 1, info, &pf->jobid, &werr);
 161         if (!NT_STATUS_IS_OK(status)) {
 162                 goto done;
 163         }
 164         if (!W_ERROR_IS_OK(werr)) {
 165                 status = werror_to_ntstatus(werr);
 166                 goto done;
 167         }
 168
 169         /* Convert to RAP id. */
 170         pf->rap_jobid = pjobid_to_rap(pf->svcname, pf->jobid);
 171         if (pf->rap_jobid == 0) {
 172                 /* No errno around here */
 173                 status = NT_STATUS_ACCESS_DENIED;
 174                 goto done;
 175         }
 176
 177         /* setup a full fsp */
 178         status = create_synthetic_smb_fname(fsp, pf->filename, NULL,
 179                                             NULL, &fsp->fsp_name);
 180         if (!NT_STATUS_IS_OK(status)) {
 181                 goto done;
 182         }
 183
 184         if (sys_fstat(fd, &fsp->fsp_name->st, false) != 0) {
 185                 status = map_nt_error_from_unix(errno);
 186                 goto done;
 187         }
 188
 189         fsp->file_id = vfs_file_id_from_sbuf(fsp->conn, &fsp->fsp_name->st);
 190         fsp->mode = fsp->fsp_name->st.st_ex_mode;
 191         fsp->fh->fd = fd;
 192
 193         fsp->vuid = current_vuid;
 194         fsp->can_lock = false;
 195         fsp->can_read = false;
 196         fsp->access_mask = FILE_GENERIC_WRITE;
 197         fsp->can_write = true;
 198         fsp->modified = false;
 199         fsp->oplock_type = NO_OPLOCK;
 200         fsp->sent_oplock_break = NO_BREAK_SENT;
 201         fsp->is_directory = false;
 202
 203         fsp->print_file = pf;
 204
 205         status = NT_STATUS_OK;
 206 done:
 207         if (!NT_STATUS_IS_OK(status)) {
 208                 if (fd != -1) {
 209                         close(fd);
 210                         unlink(fsp->print_file->filename);
 211                 }
 212                 /* We need to delete the job from spoolss too */
 213                 if (pf->jobid) {
 214                         print_spool_terminate(fsp->conn, pf);
 215                 }
 216         }
 217         talloc_free(tmp_ctx);
 218         return status;
 219 }
 220
 221 int print_spool_write(files_struct *fsp,
 222                       const char *data, uint32_t size,
 223                       SMB_OFF_T offset, uint32_t *written)
 224 {
 225         SMB_STRUCT_STAT st;
 226         ssize_t n;
 227         int ret;
 228
 229         *written = 0;
 230
 231         /* first of all stat file to find out if it is still there.
 232          * spoolss may have deleted it to signal someone has killed
 233          * the job through it's interface */
 234
 235         if (sys_fstat(fsp->fh->fd, &st, false) != 0) {
 236                 ret = errno;
 237                 DEBUG(3, ("printfile_offset: sys_fstat failed on %s (%s)\n",
 238                           fsp_str_dbg(fsp), strerror(ret)));
 239                 return ret;
 240         }
 241
 242         /* check if the file is unlinked, this will signal spoolss has
 243          * killed it, just return an error and close the file */
 244         if (st.st_ex_nlink == 0) {
 245                 close(fsp->fh->fd);
 246                 return EBADF;
 247         }
 248
 249         /* When print files go beyond 4GB, the 32-bit offset sent in
 250          * old SMBwrite calls is relative to the current 4GB chunk
 251          * we're writing to.
 252          *    Discovered by Sebastian Kloska <oncaphillis@snafu.de>.
 253          */
 254         if (offset < 0xffffffff00000000LL) {
 255                 offset = (st.st_ex_size & 0xffffffff00000000LL) + offset;
 256         }
 257
 258         n = write_data_at_offset(fsp->fh->fd, data, size, offset);
 259         if (n == -1) {
 260                 ret = errno;
 261                 print_spool_terminate(fsp->conn, fsp->print_file);
 262         } else {
 263                 *written = n;
 264                 ret = 0;
 265         }
 266
 267         return ret;
 268 }
 269
 270 void print_spool_end(files_struct *fsp, enum file_close_type close_type)
 271 {
 272         struct rpc_pipe_client *cli;
 273         NTSTATUS status;
 274         WERROR werr;
 275
 276         status = rpc_pipe_open_interface(fsp->conn,
 277                                          &ndr_table_spoolss.syntax_id,
 278                                          fsp->conn->server_info,
 279                                          &fsp->conn->sconn->client_id,
 280                                          fsp->conn->sconn->msg_ctx,
 281                                          &fsp->conn->spoolss_pipe);
 282         if (!NT_STATUS_IS_OK(status)) {
 283                 DEBUG(0, ("print_spool_end: "
 284                           "Failed to get spoolss pipe [%s]\n",
 285                           nt_errstr(status)));
 286                 return;
 287         }
 288         cli = fsp->conn->spoolss_pipe;
 289
 290         switch (close_type) {
 291         case NORMAL_CLOSE:
 292         case SHUTDOWN_CLOSE:
 293                 /* this also automatically calls spoolss_EndDocPrinter */
 294                 status = rpccli_spoolss_ClosePrinter(cli, fsp->print_file,
 295                                                 &fsp->print_file->handle,
 296                                                 &werr);
 297                 if (!NT_STATUS_IS_OK(status) ||
 298                     !NT_STATUS_IS_OK(status = werror_to_ntstatus(werr))) {
 299                         DEBUG(3, ("Failed to close printer %s [%s]\n",
 300                               fsp->print_file->svcname, nt_errstr(status)));
 301                 }
 302                 break;
 303         case ERROR_CLOSE:
 304                 print_spool_terminate(fsp->conn, fsp->print_file);
 305                 break;
 306         }
 307 }
 308
 309
 310 void print_spool_terminate(struct connection_struct *conn,
 311                            struct print_file_data *print_file)
 312 {
 313         struct rpc_pipe_client *cli;
 314         NTSTATUS status;
 315         WERROR werr;
 316
 317         rap_jobid_delete(print_file->svcname, print_file->jobid);
 318
 319         status = rpc_pipe_open_interface(conn,
 320                                          &ndr_table_spoolss.syntax_id,
 321                                          conn->server_info,
 322                                          &conn->sconn->client_id,
 323                                          conn->sconn->msg_ctx,
 324                                          &conn->spoolss_pipe);
 325         if (!NT_STATUS_IS_OK(status)) {
 326                 DEBUG(0, ("print_spool_terminate: "
 327                           "Failed to get spoolss pipe [%s]\n",
 328                           nt_errstr(status)));
 329                 return;
 330         }
 331         cli = &conn->spoolss_pipe;
 332
 333         status = rpccli_spoolss_SetJob(cli, print_file,
 334                                         &print_file->handle,
 335                                         print_file->jobid,
 336                                         NULL, SPOOLSS_JOB_CONTROL_DELETE,
 337                                         &werr);
 338         if (!NT_STATUS_IS_OK(status) ||
 339             !NT_STATUS_IS_OK(status = werror_to_ntstatus(werr))) {
 340                 DEBUG(3, ("Failed to delete job %d [%s]\n",
 341                           print_file->jobid, nt_errstr(status)));
 342                 return;
 343         }
 344         status = rpccli_spoolss_ClosePrinter(cli, print_file,
 345                                              &print_file->handle,
 346                                              &werr);
 347         if (!NT_STATUS_IS_OK(status) ||
 348             !NT_STATUS_IS_OK(status = werror_to_ntstatus(werr))) {
 349                 DEBUG(3, ("Failed to close printer %s [%s]\n",
 350                           print_file->svcname, nt_errstr(status)));
 351                 return;
 352         }
 353 }