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