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