2 Unix SMB/CIFS implementation.
3 raw trans/trans2/nttrans operations
5 Copyright (C) James Myers 2003 <myersjj@samba.org>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 check out of bounds for incoming data
28 static BOOL raw_trans_oob(struct cli_request *req,
29 uint_t offset, uint_t count)
37 ptr = req->in.hdr + offset;
39 /* be careful with wraparound! */
40 if (ptr < req->in.data ||
41 ptr >= req->in.data + req->in.data_size ||
42 count > req->in.data_size ||
43 ptr + count > req->in.data + req->in.data_size) {
49 /****************************************************************************
50 receive a SMB trans or trans2 response allocating the necessary memory
51 ****************************************************************************/
52 NTSTATUS smb_raw_trans2_recv(struct cli_request *req,
54 struct smb_trans2 *parms)
61 parms->out.data.length = 0;
62 parms->out.data.data = NULL;
63 parms->out.params.length = 0;
64 parms->out.params.data = NULL;
66 if (!cli_request_receive(req)) {
67 req->status = NT_STATUS_UNSUCCESSFUL;
68 return cli_request_destroy(req);
72 * An NT RPC pipe call can return ERRDOS, ERRmoredata
73 * to a trans call. This is not an error and should not
76 if (NT_STATUS_IS_ERR(req->status)) {
77 return cli_request_destroy(req);
80 CLI_CHECK_MIN_WCT(req, 10);
82 /* parse out the lengths */
83 total_data = SVAL(req->in.vwv, VWV(1));
84 total_param = SVAL(req->in.vwv, VWV(0));
87 if (total_data != 0) {
88 tdata = talloc_realloc(mem_ctx, parms->out.data.data,total_data);
90 DEBUG(0,("smb_raw_receive_trans: failed to enlarge data buffer to %d bytes\n", total_data));
91 req->status = NT_STATUS_NO_MEMORY;
92 return cli_request_destroy(req);
94 parms->out.data.data = tdata;
97 if (total_param != 0) {
98 tparam = talloc_realloc(mem_ctx, parms->out.params.data,total_param);
100 DEBUG(0,("smb_raw_receive_trans: failed to enlarge param buffer to %d bytes\n", total_param));
101 req->status = NT_STATUS_NO_MEMORY;
102 return cli_request_destroy(req);
104 parms->out.params.data = tparam;
107 parms->out.setup_count = SVAL(req->in.vwv, VWV(9));
108 CLI_CHECK_WCT(req, 10 + parms->out.setup_count);
110 if (parms->out.setup_count > 0) {
112 parms->out.setup = talloc(mem_ctx, 2 * parms->out.setup_count);
113 if (!parms->out.setup) {
114 req->status = NT_STATUS_NO_MEMORY;
115 return cli_request_destroy(req);
117 for (i=0;i<parms->out.setup_count;i++) {
118 parms->out.setup[i] = SVAL(req->in.vwv, VWV(10+i));
123 uint16 param_count, param_ofs, param_disp;
124 uint16 data_count, data_ofs, data_disp;
125 uint16 total_data2, total_param2;
127 /* parse out the total lengths again - they can shrink! */
128 total_data2 = SVAL(req->in.vwv, VWV(1));
129 total_param2 = SVAL(req->in.vwv, VWV(0));
131 if (total_data2 > total_data ||
132 total_param2 > total_param) {
133 /* they must *only* shrink */
134 DEBUG(1,("smb_raw_receive_trans: data/params expanded!\n"));
135 req->status = NT_STATUS_BUFFER_TOO_SMALL;
136 return cli_request_destroy(req);
139 total_data = total_data2;
140 total_param = total_param2;
142 /* parse params for this lump */
143 param_count = SVAL(req->in.vwv, VWV(3));
144 param_ofs = SVAL(req->in.vwv, VWV(4));
145 param_disp = SVAL(req->in.vwv, VWV(5));
147 data_count = SVAL(req->in.vwv, VWV(6));
148 data_ofs = SVAL(req->in.vwv, VWV(7));
149 data_disp = SVAL(req->in.vwv, VWV(8));
151 if (data_count + data_disp > total_data ||
152 param_count + param_disp > total_param) {
153 DEBUG(1,("smb_raw_receive_trans: Buffer overflow\n"));
154 req->status = NT_STATUS_BUFFER_TOO_SMALL;
155 return cli_request_destroy(req);
158 /* check the server isn't being nasty */
159 if (raw_trans_oob(req, param_ofs, param_count) ||
160 raw_trans_oob(req, data_ofs, data_count)) {
161 DEBUG(1,("smb_raw_receive_trans: out of bounds parameters!\n"));
162 req->status = NT_STATUS_BUFFER_TOO_SMALL;
163 return cli_request_destroy(req);
167 memcpy(parms->out.data.data + data_disp,
168 req->in.hdr + data_ofs,
173 memcpy(parms->out.params.data + param_disp,
174 req->in.hdr + param_ofs,
178 parms->out.data.length += data_count;
179 parms->out.params.length += param_count;
181 if (total_data <= parms->out.data.length && total_param <= parms->out.params.length)
184 /* to receive more requests we need to mark this request as not received */
185 req->in.buffer = NULL;
187 if (!cli_request_receive(req)) {
188 req->status = NT_STATUS_UNSUCCESSFUL;
189 return cli_request_destroy(req);
194 return cli_request_destroy(req);
198 /****************************************************************************
199 trans2 raw async interface - only BLOBs used in this interface.
200 note that this doesn't yet support multi-part requests
201 ****************************************************************************/
202 struct cli_request *smb_raw_trans2_send(struct cli_tree *tree,
203 struct smb_trans2 *parms)
205 uint8 command = SMBtrans2;
206 int wct = 14 + parms->in.setup_count;
207 struct cli_request *req;
208 char *outdata,*outparam;
209 int data_sent, param_sent;
211 const int padding = 3;
213 req = cli_request_setup(tree, command, wct, padding);
218 /* fill in SMB parameters */
219 data_sent = parms->in.data.length;
220 param_sent = parms->in.params.length;
221 outparam = req->out.data + padding;
222 outdata = outparam + param_sent;
224 /* make sure we don't leak data via the padding */
225 memset(req->out.data, 0, padding);
227 /* primary request */
228 SSVAL(req->out.vwv,VWV(0),parms->in.params.length);
229 SSVAL(req->out.vwv,VWV(1),parms->in.data.length);
230 SSVAL(req->out.vwv,VWV(2),parms->in.max_param);
231 SSVAL(req->out.vwv,VWV(3),parms->in.max_data);
232 SSVAL(req->out.vwv,VWV(4),parms->in.max_setup);
233 SSVAL(req->out.vwv,VWV(5),parms->in.flags);
234 SIVAL(req->out.vwv,VWV(6),parms->in.timeout);
235 SSVAL(req->out.vwv,VWV(8),0); /* reserved */
236 SSVAL(req->out.vwv,VWV(9),parms->in.params.length);
237 SSVAL(req->out.vwv,VWV(10),PTR_DIFF(outparam,req->out.hdr));
238 SSVAL(req->out.vwv,VWV(11),parms->in.data.length);
239 SSVAL(req->out.vwv,VWV(12),PTR_DIFF(outdata,req->out.hdr));
240 SSVAL(req->out.vwv,VWV(13),parms->in.setup_count);
241 for (i=0;i<parms->in.setup_count;i++) {
242 SSVAL(req->out.vwv,VWV(14)+i*2,parms->in.setup[i]);
244 if (parms->in.params.data) {
245 cli_req_append_blob(req, &parms->in.params);
247 if (parms->in.data.data) {
248 cli_req_append_blob(req, &parms->in.data);
251 if (!cli_request_send(req)) {
252 cli_request_destroy(req);
260 trans2 synchronous blob interface
262 NTSTATUS smb_raw_trans2(struct cli_tree *tree,
264 struct smb_trans2 *parms)
266 struct cli_request *req;
267 req = smb_raw_trans2_send(tree, parms);
268 if (!req) return NT_STATUS_UNSUCCESSFUL;
269 return smb_raw_trans2_recv(req, mem_ctx, parms);
273 /****************************************************************************
274 receive a SMB nttrans response allocating the necessary memory
275 ****************************************************************************/
276 NTSTATUS smb_raw_nttrans_recv(struct cli_request *req,
278 struct smb_nttrans *parms)
280 uint32 total_data, recvd_data=0;
281 uint32 total_param, recvd_param=0;
283 if (!cli_request_receive(req) ||
284 cli_request_is_error(req)) {
285 return cli_request_destroy(req);
289 if (CVAL(req->in.hdr, HDR_COM) != SMBnttrans) {
290 DEBUG(0,("smb_raw_receive_nttrans: Expected %s response, got command 0x%02x\n",
292 CVAL(req->in.hdr,HDR_COM)));
293 req->status = NT_STATUS_UNSUCCESSFUL;
294 return cli_request_destroy(req);
297 CLI_CHECK_MIN_WCT(req, 18);
299 /* parse out the lengths */
300 total_param = IVAL(req->in.vwv, 3);
301 total_data = IVAL(req->in.vwv, 7);
303 parms->out.data = data_blob_talloc(mem_ctx, NULL, total_data);
304 parms->out.params = data_blob_talloc(mem_ctx, NULL, total_param);
306 if (parms->out.data.length != total_data ||
307 parms->out.params.length != total_param) {
308 req->status = NT_STATUS_NO_MEMORY;
309 return cli_request_destroy(req);
312 parms->out.setup_count = CVAL(req->in.vwv, 35);
313 CLI_CHECK_WCT(req, 18 + parms->out.setup_count);
315 if (parms->out.setup_count > 0) {
317 parms->out.setup = talloc(mem_ctx, 2 * parms->out.setup_count);
318 if (!parms->out.setup) {
319 req->status = NT_STATUS_NO_MEMORY;
320 return cli_request_destroy(req);
322 for (i=0;i<parms->out.setup_count;i++) {
323 parms->out.setup[i] = SVAL(req->in.vwv, VWV(18+i));
327 while (recvd_data < total_data ||
328 recvd_param < total_param) {
329 uint32 param_count, param_ofs, param_disp;
330 uint32 data_count, data_ofs, data_disp;
331 uint32 total_data2, total_param2;
333 /* parse out the total lengths again - they can shrink! */
334 total_param2 = IVAL(req->in.vwv, 3);
335 total_data2 = IVAL(req->in.vwv, 7);
337 if (total_data2 > total_data ||
338 total_param2 > total_param) {
339 /* they must *only* shrink */
340 DEBUG(1,("smb_raw_receive_nttrans: data/params expanded!\n"));
341 req->status = NT_STATUS_BUFFER_TOO_SMALL;
342 return cli_request_destroy(req);
345 total_data = total_data2;
346 total_param = total_param2;
347 parms->out.data.length = total_data;
348 parms->out.params.length = total_param;
350 /* parse params for this lump */
351 param_count = IVAL(req->in.vwv, 11);
352 param_ofs = IVAL(req->in.vwv, 15);
353 param_disp = IVAL(req->in.vwv, 19);
355 data_count = IVAL(req->in.vwv, 23);
356 data_ofs = IVAL(req->in.vwv, 27);
357 data_disp = IVAL(req->in.vwv, 31);
359 if (data_count + data_disp > total_data ||
360 param_count + param_disp > total_param) {
361 DEBUG(1,("smb_raw_receive_nttrans: Buffer overflow\n"));
362 req->status = NT_STATUS_BUFFER_TOO_SMALL;
363 return cli_request_destroy(req);
366 /* check the server isn't being nasty */
367 if (raw_trans_oob(req, param_ofs, param_count) ||
368 raw_trans_oob(req, data_ofs, data_count)) {
369 DEBUG(1,("smb_raw_receive_nttrans: out of bounds parameters!\n"));
370 req->status = NT_STATUS_BUFFER_TOO_SMALL;
371 return cli_request_destroy(req);
375 memcpy(parms->out.data.data + data_disp,
376 req->in.hdr + data_ofs,
381 memcpy(parms->out.params.data + param_disp,
382 req->in.hdr + param_ofs,
386 recvd_param += param_count;
387 recvd_data += data_count;
389 if (recvd_data >= total_data &&
390 recvd_param >= total_param) {
394 if (!cli_request_receive(req) ||
395 cli_request_is_error(req)) {
396 return cli_request_destroy(req);
400 if (CVAL(req->in.hdr, HDR_COM) != SMBnttrans) {
401 DEBUG(0,("smb_raw_receive_nttrans: Expected nttranss, got command 0x%02x\n",
402 CVAL(req->in.hdr, HDR_COM)));
403 req->status = NT_STATUS_UNSUCCESSFUL;
404 return cli_request_destroy(req);
409 return cli_request_destroy(req);
413 /****************************************************************************
414 nttrans raw - only BLOBs used in this interface.
415 at the moment we only handle a single primary request
416 ****************************************************************************/
417 struct cli_request *smb_raw_nttrans_send(struct cli_tree *tree,
418 struct smb_nttrans *parms)
420 struct cli_request *req;
421 char *outdata, *outparam;
425 /* only align if there are parameters or data */
426 if (parms->in.params.length || parms->in.data.length) {
430 req = cli_request_setup(tree, SMBnttrans,
431 19 + parms->in.setup_count,
433 parms->in.params.length +
434 parms->in.data.length);
439 /* fill in SMB parameters */
440 outparam = req->out.data + align;
441 outdata = outparam + parms->in.params.length;
443 SCVAL(req->out.vwv, 0, parms->in.max_setup);
444 SSVAL(req->out.vwv, 1, 0); /* reserved */
445 SIVAL(req->out.vwv, 3, parms->in.params.length);
446 SIVAL(req->out.vwv, 7, parms->in.data.length);
447 SIVAL(req->out.vwv, 11, parms->in.max_param);
448 SIVAL(req->out.vwv, 15, parms->in.max_data);
449 SIVAL(req->out.vwv, 19, parms->in.params.length);
450 SIVAL(req->out.vwv, 23, PTR_DIFF(outparam,req->out.hdr));
451 SIVAL(req->out.vwv, 27, parms->in.data.length);
452 SIVAL(req->out.vwv, 31, PTR_DIFF(outdata,req->out.hdr));
453 SCVAL(req->out.vwv, 35, parms->in.setup_count);
454 SSVAL(req->out.vwv, 36, parms->in.function);
455 for (i=0;i<parms->in.setup_count;i++) {
456 SSVAL(req->out.vwv,VWV(19+i),parms->in.setup[i]);
458 if (parms->in.params.length) {
459 memcpy(outparam, parms->in.params.data, parms->in.params.length);
461 if (parms->in.data.length) {
462 memcpy(outparam, parms->in.data.data, parms->in.data.length);
465 if (!cli_request_send(req)) {
466 cli_request_destroy(req);
474 /****************************************************************************
475 receive a SMB nttrans response allocating the necessary memory
476 ****************************************************************************/
477 NTSTATUS smb_raw_nttrans(struct cli_tree *tree,
479 struct smb_nttrans *parms)
481 struct cli_request *req;
483 req = smb_raw_nttrans_send(tree, parms);
485 return NT_STATUS_UNSUCCESSFUL;
488 return smb_raw_nttrans_recv(req, mem_ctx, parms);