s4-dsdb: Modify the repl_meta_data behavior to allow Metadata change on attribute...
[Samba/gebeck_regimport.git] / source3 / smbd / pipes.c
blob2ff3779b0e9720f4eec4bdc30698854ae2b80024
1 /*
2 Unix SMB/CIFS implementation.
3 Pipe SMB reply routines
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Luke Kenneth Casson Leighton 1996-1998
6 Copyright (C) Paul Ashton 1997-1998.
7 Copyright (C) Jeremy Allison 2005.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 This file handles reply_ calls on named pipes that the server
24 makes to handle specific protocols
28 #include "includes.h"
29 #include "smbd/smbd.h"
30 #include "smbd/globals.h"
31 #include "libcli/security/security.h"
32 #include "rpc_server/srv_pipe_hnd.h"
34 #define PIPE "\\PIPE\\"
35 #define PIPELEN strlen(PIPE)
37 #define MAX_PIPE_NAME_LEN 24
39 NTSTATUS open_np_file(struct smb_request *smb_req, const char *name,
40 struct files_struct **pfsp)
42 struct connection_struct *conn = smb_req->conn;
43 struct files_struct *fsp;
44 struct smb_filename *smb_fname = NULL;
45 NTSTATUS status;
47 status = file_new(smb_req, conn, &fsp);
48 if (!NT_STATUS_IS_OK(status)) {
49 DEBUG(0, ("file_new failed: %s\n", nt_errstr(status)));
50 return status;
53 fsp->conn = conn;
54 fsp->fh->fd = -1;
55 fsp->vuid = smb_req->vuid;
56 fsp->can_lock = false;
57 fsp->access_mask = FILE_READ_DATA | FILE_WRITE_DATA;
59 status = create_synthetic_smb_fname(talloc_tos(), name, NULL, NULL,
60 &smb_fname);
61 if (!NT_STATUS_IS_OK(status)) {
62 file_free(smb_req, fsp);
63 return status;
65 status = fsp_set_smb_fname(fsp, smb_fname);
66 TALLOC_FREE(smb_fname);
67 if (!NT_STATUS_IS_OK(status)) {
68 file_free(smb_req, fsp);
69 return status;
72 status = np_open(fsp, name,
73 conn->sconn->local_address,
74 conn->sconn->remote_address,
75 conn->session_info,
76 conn->sconn->msg_ctx,
77 &fsp->fake_file_handle);
78 if (!NT_STATUS_IS_OK(status)) {
79 DEBUG(10, ("np_open(%s) returned %s\n", name,
80 nt_errstr(status)));
81 file_free(smb_req, fsp);
82 return status;
85 *pfsp = fsp;
87 return NT_STATUS_OK;
90 /****************************************************************************
91 Reply to an open and X on a named pipe.
92 This code is basically stolen from reply_open_and_X with some
93 wrinkles to handle pipes.
94 ****************************************************************************/
96 void reply_open_pipe_and_X(connection_struct *conn, struct smb_request *req)
98 const char *fname = NULL;
99 char *pipe_name = NULL;
100 files_struct *fsp;
101 TALLOC_CTX *ctx = talloc_tos();
102 NTSTATUS status;
104 /* XXXX we need to handle passed times, sattr and flags */
105 srvstr_pull_req_talloc(ctx, req, &pipe_name, req->buf, STR_TERMINATE);
106 if (!pipe_name) {
107 reply_botherror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND,
108 ERRDOS, ERRbadpipe);
109 return;
112 /* If the name doesn't start \PIPE\ then this is directed */
113 /* at a mailslot or something we really, really don't understand, */
114 /* not just something we really don't understand. */
115 if ( strncmp(pipe_name,PIPE,PIPELEN) != 0 ) {
116 reply_nterror(req, NT_STATUS_ACCESS_DENIED);
117 return;
120 DEBUG(4,("Opening pipe %s.\n", pipe_name));
122 /* Strip \PIPE\ off the name. */
123 fname = pipe_name + PIPELEN;
125 #if 0
127 * Hack for NT printers... JRA.
129 if(should_fail_next_srvsvc_open(fname)) {
130 reply_nterror(req, NT_STATUS_ACCESS_DENIED);
131 return;
133 #endif
135 status = open_np_file(req, fname, &fsp);
136 if (!NT_STATUS_IS_OK(status)) {
137 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
138 reply_botherror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND,
139 ERRDOS, ERRbadpipe);
140 return;
142 reply_nterror(req, status);
143 return;
146 /* Prepare the reply */
147 reply_outbuf(req, 15, 0);
149 /* Mark the opened file as an existing named pipe in message mode. */
150 SSVAL(req->outbuf,smb_vwv9,2);
151 SSVAL(req->outbuf,smb_vwv10,0xc700);
153 SSVAL(req->outbuf, smb_vwv2, fsp->fnum);
154 SSVAL(req->outbuf, smb_vwv3, 0); /* fmode */
155 srv_put_dos_date3((char *)req->outbuf, smb_vwv4, 0); /* mtime */
156 SIVAL(req->outbuf, smb_vwv6, 0); /* size */
157 SSVAL(req->outbuf, smb_vwv8, 0); /* rmode */
158 SSVAL(req->outbuf, smb_vwv11, 0x0001);
160 chain_reply(req);
161 return;
164 /****************************************************************************
165 Reply to a write on a pipe.
166 ****************************************************************************/
168 struct pipe_write_state {
169 size_t numtowrite;
172 static void pipe_write_done(struct tevent_req *subreq);
174 void reply_pipe_write(struct smb_request *req)
176 files_struct *fsp = file_fsp(req, SVAL(req->vwv+0, 0));
177 const uint8_t *data;
178 struct pipe_write_state *state;
179 struct tevent_req *subreq;
181 if (!fsp_is_np(fsp)) {
182 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
183 return;
186 if (fsp->vuid != req->vuid) {
187 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
188 return;
191 state = talloc(req, struct pipe_write_state);
192 if (state == NULL) {
193 reply_nterror(req, NT_STATUS_NO_MEMORY);
194 return;
196 req->async_priv = state;
198 state->numtowrite = SVAL(req->vwv+1, 0);
200 data = req->buf + 3;
202 DEBUG(6, ("reply_pipe_write: %x name: %s len: %d\n", (int)fsp->fnum,
203 fsp_str_dbg(fsp), (int)state->numtowrite));
205 subreq = np_write_send(state, server_event_context(),
206 fsp->fake_file_handle, data, state->numtowrite);
207 if (subreq == NULL) {
208 TALLOC_FREE(state);
209 reply_nterror(req, NT_STATUS_NO_MEMORY);
210 return;
212 tevent_req_set_callback(subreq, pipe_write_done,
213 talloc_move(req->conn, &req));
216 static void pipe_write_done(struct tevent_req *subreq)
218 struct smb_request *req = tevent_req_callback_data(
219 subreq, struct smb_request);
220 struct pipe_write_state *state = talloc_get_type_abort(
221 req->async_priv, struct pipe_write_state);
222 NTSTATUS status;
223 ssize_t nwritten = -1;
225 status = np_write_recv(subreq, &nwritten);
226 TALLOC_FREE(subreq);
227 if (nwritten < 0) {
228 reply_nterror(req, status);
229 goto send;
232 /* Looks bogus to me now. Needs to be removed ? JRA. */
233 if ((nwritten == 0 && state->numtowrite != 0)) {
234 reply_nterror(req, NT_STATUS_ACCESS_DENIED);
235 goto send;
238 reply_outbuf(req, 1, 0);
240 SSVAL(req->outbuf,smb_vwv0,nwritten);
242 DEBUG(3,("write-IPC nwritten=%d\n", (int)nwritten));
244 send:
245 if (!srv_send_smb(req->sconn, (char *)req->outbuf,
246 true, req->seqnum+1,
247 IS_CONN_ENCRYPTED(req->conn)||req->encrypted,
248 &req->pcd)) {
249 exit_server_cleanly("construct_reply: srv_send_smb failed.");
251 TALLOC_FREE(req);
254 /****************************************************************************
255 Reply to a write and X.
257 This code is basically stolen from reply_write_and_X with some
258 wrinkles to handle pipes.
259 ****************************************************************************/
261 struct pipe_write_andx_state {
262 bool pipe_start_message_raw;
263 size_t numtowrite;
266 static void pipe_write_andx_done(struct tevent_req *subreq);
268 void reply_pipe_write_and_X(struct smb_request *req)
270 files_struct *fsp = file_fsp(req, SVAL(req->vwv+2, 0));
271 int smb_doff = SVAL(req->vwv+11, 0);
272 const uint8_t *data;
273 struct pipe_write_andx_state *state;
274 struct tevent_req *subreq;
276 if (!fsp_is_np(fsp)) {
277 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
278 return;
281 if (fsp->vuid != req->vuid) {
282 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
283 return;
286 state = talloc(req, struct pipe_write_andx_state);
287 if (state == NULL) {
288 reply_nterror(req, NT_STATUS_NO_MEMORY);
289 return;
291 req->async_priv = state;
293 state->numtowrite = SVAL(req->vwv+10, 0);
294 state->pipe_start_message_raw =
295 ((SVAL(req->vwv+7, 0) & (PIPE_START_MESSAGE|PIPE_RAW_MODE))
296 == (PIPE_START_MESSAGE|PIPE_RAW_MODE));
298 DEBUG(6, ("reply_pipe_write_and_X: %x name: %s len: %d\n",
299 (int)fsp->fnum, fsp_str_dbg(fsp), (int)state->numtowrite));
301 data = (const uint8_t *)smb_base(req->inbuf) + smb_doff;
303 if (state->pipe_start_message_raw) {
305 * For the start of a message in named pipe byte mode,
306 * the first two bytes are a length-of-pdu field. Ignore
307 * them (we don't trust the client). JRA.
309 if (state->numtowrite < 2) {
310 DEBUG(0,("reply_pipe_write_and_X: start of message "
311 "set and not enough data sent.(%u)\n",
312 (unsigned int)state->numtowrite ));
313 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
314 return;
317 data += 2;
318 state->numtowrite -= 2;
321 subreq = np_write_send(state, server_event_context(),
322 fsp->fake_file_handle, data, state->numtowrite);
323 if (subreq == NULL) {
324 TALLOC_FREE(state);
325 reply_nterror(req, NT_STATUS_NO_MEMORY);
326 return;
328 tevent_req_set_callback(subreq, pipe_write_andx_done,
329 talloc_move(req->conn, &req));
332 static void pipe_write_andx_done(struct tevent_req *subreq)
334 struct smb_request *req = tevent_req_callback_data(
335 subreq, struct smb_request);
336 struct pipe_write_andx_state *state = talloc_get_type_abort(
337 req->async_priv, struct pipe_write_andx_state);
338 NTSTATUS status;
339 ssize_t nwritten = -1;
341 status = np_write_recv(subreq, &nwritten);
342 TALLOC_FREE(subreq);
344 if (!NT_STATUS_IS_OK(status)) {
345 reply_nterror(req, status);
346 goto done;
349 /* Looks bogus to me now. Is this error message correct ? JRA. */
350 if (nwritten != state->numtowrite) {
351 reply_nterror(req, NT_STATUS_ACCESS_DENIED);
352 goto done;
355 reply_outbuf(req, 6, 0);
357 nwritten = (state->pipe_start_message_raw ? nwritten + 2 : nwritten);
358 SSVAL(req->outbuf,smb_vwv2,nwritten);
360 DEBUG(3,("writeX-IPC nwritten=%d\n", (int)nwritten));
362 done:
363 chain_reply(req);
365 * We must free here as the ownership of req was
366 * moved to the connection struct in reply_pipe_write_and_X().
368 TALLOC_FREE(req);
371 /****************************************************************************
372 Reply to a read and X.
373 This code is basically stolen from reply_read_and_X with some
374 wrinkles to handle pipes.
375 ****************************************************************************/
377 struct pipe_read_andx_state {
378 uint8_t *outbuf;
379 int smb_mincnt;
380 int smb_maxcnt;
383 static void pipe_read_andx_done(struct tevent_req *subreq);
385 void reply_pipe_read_and_X(struct smb_request *req)
387 files_struct *fsp = file_fsp(req, SVAL(req->vwv+0, 0));
388 uint8_t *data;
389 struct pipe_read_andx_state *state;
390 struct tevent_req *subreq;
392 /* we don't use the offset given to use for pipe reads. This
393 is deliberate, instead we always return the next lump of
394 data on the pipe */
395 #if 0
396 uint32 smb_offs = IVAL(req->vwv+3, 0);
397 #endif
399 if (!fsp_is_np(fsp)) {
400 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
401 return;
404 if (fsp->vuid != req->vuid) {
405 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
406 return;
409 state = talloc(req, struct pipe_read_andx_state);
410 if (state == NULL) {
411 reply_nterror(req, NT_STATUS_NO_MEMORY);
412 return;
414 req->async_priv = state;
416 state->smb_maxcnt = SVAL(req->vwv+5, 0);
417 state->smb_mincnt = SVAL(req->vwv+6, 0);
419 reply_outbuf(req, 12, state->smb_maxcnt);
420 data = (uint8_t *)smb_buf(req->outbuf);
423 * We have to tell the upper layers that we're async.
425 state->outbuf = req->outbuf;
426 req->outbuf = NULL;
428 subreq = np_read_send(state, server_event_context(),
429 fsp->fake_file_handle, data,
430 state->smb_maxcnt);
431 if (subreq == NULL) {
432 reply_nterror(req, NT_STATUS_NO_MEMORY);
433 return;
435 tevent_req_set_callback(subreq, pipe_read_andx_done,
436 talloc_move(req->conn, &req));
439 static void pipe_read_andx_done(struct tevent_req *subreq)
441 struct smb_request *req = tevent_req_callback_data(
442 subreq, struct smb_request);
443 struct pipe_read_andx_state *state = talloc_get_type_abort(
444 req->async_priv, struct pipe_read_andx_state);
445 NTSTATUS status;
446 ssize_t nread;
447 bool is_data_outstanding;
449 status = np_read_recv(subreq, &nread, &is_data_outstanding);
450 TALLOC_FREE(subreq);
451 if (!NT_STATUS_IS_OK(status)) {
452 reply_nterror(req, status);
453 goto done;
456 req->outbuf = state->outbuf;
457 state->outbuf = NULL;
459 srv_set_message((char *)req->outbuf, 12, nread, False);
461 #if 0
463 * we should return STATUS_BUFFER_OVERFLOW if there's
464 * out standing data.
466 * But we can't enable it yet, as it has bad interactions
467 * with fixup_chain_error_packet() in chain_reply().
469 if (is_data_outstanding) {
470 error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
471 STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
473 #endif
475 SSVAL(req->outbuf,smb_vwv5,nread);
476 SSVAL(req->outbuf,smb_vwv6,
477 req_wct_ofs(req)
478 + 1 /* the wct field */
479 + 12 * sizeof(uint16_t) /* vwv */
480 + 2); /* the buflen field */
481 SSVAL(req->outbuf,smb_vwv11,state->smb_maxcnt);
483 DEBUG(3,("readX-IPC min=%d max=%d nread=%d\n",
484 state->smb_mincnt, state->smb_maxcnt, (int)nread));
486 done:
487 chain_reply(req);
489 * We must free here as the ownership of req was
490 * moved to the connection struct in reply_pipe_read_and_X().
492 TALLOC_FREE(req);