2 Unix SMB/CIFS implementation.
3 client transaction calls
4 Copyright (C) Andrew Tridgell 1994-1998
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 2 of the License, or
9 (at your option) any later version.
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.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 /****************************************************************************
27 Send a SMB trans or trans2 request.
28 ****************************************************************************/
30 BOOL cli_send_trans(struct cli_state *cli, int trans,
31 const char *pipe_name,
33 uint16 *setup, unsigned int lsetup, unsigned int msetup,
34 const char *param, unsigned int lparam, unsigned int mparam,
35 const char *data, unsigned int ldata, unsigned int mdata)
38 unsigned int this_ldata,this_lparam;
39 unsigned int tot_data=0,tot_param=0;
40 char *outdata,*outparam;
45 this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
46 this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
48 memset(cli->outbuf,'\0',smb_size);
49 set_message(cli->outbuf,14+lsetup,0,True);
50 SCVAL(cli->outbuf,smb_com,trans);
51 SSVAL(cli->outbuf,smb_tid, cli->cnum);
52 cli_setup_packet(cli);
55 * Save the mid we're using. We need this for finding
62 pipe_name_len = clistr_push(cli, smb_buf(cli->outbuf), pipe_name, -1, STR_TERMINATE);
65 outparam = smb_buf(cli->outbuf)+(trans==SMBtrans ? pipe_name_len : 3);
66 outdata = outparam+this_lparam;
69 SSVAL(cli->outbuf,smb_tpscnt,lparam); /* tpscnt */
70 SSVAL(cli->outbuf,smb_tdscnt,ldata); /* tdscnt */
71 SSVAL(cli->outbuf,smb_mprcnt,mparam); /* mprcnt */
72 SSVAL(cli->outbuf,smb_mdrcnt,mdata); /* mdrcnt */
73 SCVAL(cli->outbuf,smb_msrcnt,msetup); /* msrcnt */
74 SSVAL(cli->outbuf,smb_flags,flags); /* flags */
75 SIVAL(cli->outbuf,smb_timeout,0); /* timeout */
76 SSVAL(cli->outbuf,smb_pscnt,this_lparam); /* pscnt */
77 SSVAL(cli->outbuf,smb_psoff,smb_offset(outparam,cli->outbuf)); /* psoff */
78 SSVAL(cli->outbuf,smb_dscnt,this_ldata); /* dscnt */
79 SSVAL(cli->outbuf,smb_dsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
80 SCVAL(cli->outbuf,smb_suwcnt,lsetup); /* suwcnt */
81 for (i=0;i<lsetup;i++) /* setup[] */
82 SSVAL(cli->outbuf,smb_setup+i*2,setup[i]);
83 p = smb_buf(cli->outbuf);
84 if (trans != SMBtrans) {
85 *p++ = 0; /* put in a null smb_name */
86 *p++ = 'D'; *p++ = ' '; /* observed in OS/2 */
88 if (this_lparam) /* param[] */
89 memcpy(outparam,param,this_lparam);
90 if (this_ldata) /* data[] */
91 memcpy(outdata,data,this_ldata);
92 cli_setup_bcc(cli, outdata+this_ldata);
94 show_msg(cli->outbuf);
96 if (!cli_send_smb(cli)) {
100 if (this_ldata < ldata || this_lparam < lparam) {
101 /* receive interim response */
102 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
106 tot_data = this_ldata;
107 tot_param = this_lparam;
109 while (tot_data < ldata || tot_param < lparam) {
110 this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
111 this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
113 set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
114 SCVAL(cli->outbuf,smb_com,(trans==SMBtrans ? SMBtranss : SMBtranss2));
116 outparam = smb_buf(cli->outbuf);
117 outdata = outparam+this_lparam;
119 /* secondary request */
120 SSVAL(cli->outbuf,smb_tpscnt,lparam); /* tpscnt */
121 SSVAL(cli->outbuf,smb_tdscnt,ldata); /* tdscnt */
122 SSVAL(cli->outbuf,smb_spscnt,this_lparam); /* pscnt */
123 SSVAL(cli->outbuf,smb_spsoff,smb_offset(outparam,cli->outbuf)); /* psoff */
124 SSVAL(cli->outbuf,smb_spsdisp,tot_param); /* psdisp */
125 SSVAL(cli->outbuf,smb_sdscnt,this_ldata); /* dscnt */
126 SSVAL(cli->outbuf,smb_sdsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
127 SSVAL(cli->outbuf,smb_sdsdisp,tot_data); /* dsdisp */
128 if (trans==SMBtrans2)
129 SSVALS(cli->outbuf,smb_sfid,fid); /* fid */
130 if (this_lparam) /* param[] */
131 memcpy(outparam,param+tot_param,this_lparam);
132 if (this_ldata) /* data[] */
133 memcpy(outdata,data+tot_data,this_ldata);
134 cli_setup_bcc(cli, outdata+this_ldata);
137 * Save the mid we're using. We need this for finding
142 show_msg(cli->outbuf);
143 if (!cli_send_smb(cli)) {
147 /* Ensure we use the same mid for the secondaries. */
150 tot_data += this_ldata;
151 tot_param += this_lparam;
155 /* Note we're in a trans state. Save the sequence
156 * numbers for replies. */
158 cli_signing_trans_start(cli, mid);
162 /****************************************************************************
163 Receive a SMB trans or trans2 response allocating the necessary memory.
164 ****************************************************************************/
166 BOOL cli_receive_trans(struct cli_state *cli,int trans,
167 char **param, unsigned int *param_len,
168 char **data, unsigned int *data_len)
170 unsigned int total_data=0;
171 unsigned int total_param=0;
172 unsigned int this_data,this_param;
177 *data_len = *param_len = 0;
179 if (!cli_receive_smb(cli)) {
180 cli_signing_trans_stop(cli);
184 show_msg(cli->inbuf);
187 if (CVAL(cli->inbuf,smb_com) != trans) {
188 DEBUG(0,("Expected %s response, got command 0x%02x\n",
189 trans==SMBtrans?"SMBtrans":"SMBtrans2",
190 CVAL(cli->inbuf,smb_com)));
191 cli_signing_trans_stop(cli);
196 * An NT RPC pipe call can return ERRDOS, ERRmoredata
197 * to a trans call. This is not an error and should not
198 * be treated as such.
200 status = cli_nt_error(cli);
202 if (NT_STATUS_IS_ERR(status)) {
203 cli_signing_trans_stop(cli);
207 /* parse out the lengths */
208 total_data = SVAL(cli->inbuf,smb_tdrcnt);
209 total_param = SVAL(cli->inbuf,smb_tprcnt);
213 tdata = Realloc(*data,total_data);
215 DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
216 cli_signing_trans_stop(cli);
223 if (total_param!=0) {
224 tparam = Realloc(*param,total_param);
226 DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
227 cli_signing_trans_stop(cli);
235 this_data = SVAL(cli->inbuf,smb_drcnt);
236 this_param = SVAL(cli->inbuf,smb_prcnt);
238 if (this_data + *data_len > total_data ||
239 this_param + *param_len > total_param) {
240 DEBUG(1,("Data overflow in cli_receive_trans\n"));
241 cli_signing_trans_stop(cli);
245 if (this_data + *data_len < this_data ||
246 this_data + *data_len < *data_len ||
247 this_param + *param_len < this_param ||
248 this_param + *param_len < *param_len) {
249 DEBUG(1,("Data overflow in cli_receive_trans\n"));
250 cli_signing_trans_stop(cli);
255 unsigned int data_offset_out = SVAL(cli->inbuf,smb_drdisp);
256 unsigned int data_offset_in = SVAL(cli->inbuf,smb_droff);
258 if (data_offset_out > total_data ||
259 data_offset_out + this_data > total_data ||
260 data_offset_out + this_data < data_offset_out ||
261 data_offset_out + this_data < this_data) {
262 DEBUG(1,("Data overflow in cli_receive_trans\n"));
263 cli_signing_trans_stop(cli);
266 if (data_offset_in > cli->bufsize ||
267 data_offset_in + this_data > cli->bufsize ||
268 data_offset_in + this_data < data_offset_in ||
269 data_offset_in + this_data < this_data) {
270 DEBUG(1,("Data overflow in cli_receive_trans\n"));
271 cli_signing_trans_stop(cli);
275 memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
278 unsigned int param_offset_out = SVAL(cli->inbuf,smb_prdisp);
279 unsigned int param_offset_in = SVAL(cli->inbuf,smb_proff);
281 if (param_offset_out > total_param ||
282 param_offset_out + this_param > total_param ||
283 param_offset_out + this_param < param_offset_out ||
284 param_offset_out + this_param < this_param) {
285 DEBUG(1,("Param overflow in cli_receive_trans\n"));
286 cli_signing_trans_stop(cli);
289 if (param_offset_in > cli->bufsize ||
290 param_offset_in + this_param > cli->bufsize ||
291 param_offset_in + this_param < param_offset_in ||
292 param_offset_in + this_param < this_param) {
293 DEBUG(1,("Param overflow in cli_receive_trans\n"));
294 cli_signing_trans_stop(cli);
298 memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
300 *data_len += this_data;
301 *param_len += this_param;
303 if (total_data <= *data_len && total_param <= *param_len)
306 if (!cli_receive_smb(cli)) {
307 cli_signing_trans_stop(cli);
311 show_msg(cli->inbuf);
314 if (CVAL(cli->inbuf,smb_com) != trans) {
315 DEBUG(0,("Expected %s response, got command 0x%02x\n",
316 trans==SMBtrans?"SMBtrans":"SMBtrans2",
317 CVAL(cli->inbuf,smb_com)));
318 cli_signing_trans_stop(cli);
321 if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
322 cli_signing_trans_stop(cli);
326 /* parse out the total lengths again - they can shrink! */
327 if (SVAL(cli->inbuf,smb_tdrcnt) < total_data)
328 total_data = SVAL(cli->inbuf,smb_tdrcnt);
329 if (SVAL(cli->inbuf,smb_tprcnt) < total_param)
330 total_param = SVAL(cli->inbuf,smb_tprcnt);
332 if (total_data <= *data_len && total_param <= *param_len)
337 cli_signing_trans_stop(cli);
341 /****************************************************************************
342 Send a SMB nttrans request.
343 ****************************************************************************/
345 BOOL cli_send_nt_trans(struct cli_state *cli,
348 uint16 *setup, unsigned int lsetup, unsigned int msetup,
349 char *param, unsigned int lparam, unsigned int mparam,
350 char *data, unsigned int ldata, unsigned int mdata)
353 unsigned int this_ldata,this_lparam;
354 unsigned int tot_data=0,tot_param=0;
356 char *outdata,*outparam;
358 this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
359 this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
361 memset(cli->outbuf,'\0',smb_size);
362 set_message(cli->outbuf,19+lsetup,0,True);
363 SCVAL(cli->outbuf,smb_com,SMBnttrans);
364 SSVAL(cli->outbuf,smb_tid, cli->cnum);
365 cli_setup_packet(cli);
368 * Save the mid we're using. We need this for finding
374 outparam = smb_buf(cli->outbuf)+3;
375 outdata = outparam+this_lparam;
377 /* primary request */
378 SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
379 SCVAL(cli->outbuf,smb_nt_Flags,flags);
380 SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
381 SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
382 SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
383 SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
384 SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
385 SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
386 SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
387 SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
388 SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
389 SIVAL(cli->outbuf,smb_nt_Function, function);
390 for (i=0;i<lsetup;i++) /* setup[] */
391 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
393 if (this_lparam) /* param[] */
394 memcpy(outparam,param,this_lparam);
395 if (this_ldata) /* data[] */
396 memcpy(outdata,data,this_ldata);
398 cli_setup_bcc(cli, outdata+this_ldata);
400 show_msg(cli->outbuf);
401 if (!cli_send_smb(cli)) {
405 if (this_ldata < ldata || this_lparam < lparam) {
406 /* receive interim response */
407 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
411 tot_data = this_ldata;
412 tot_param = this_lparam;
414 while (tot_data < ldata || tot_param < lparam) {
415 this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
416 this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
418 set_message(cli->outbuf,18,0,True);
419 SCVAL(cli->outbuf,smb_com,SMBnttranss);
421 /* XXX - these should probably be aligned */
422 outparam = smb_buf(cli->outbuf);
423 outdata = outparam+this_lparam;
425 /* secondary request */
426 SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
427 SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
428 SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
429 SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
430 SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
431 SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
432 SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
433 SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
434 if (this_lparam) /* param[] */
435 memcpy(outparam,param+tot_param,this_lparam);
436 if (this_ldata) /* data[] */
437 memcpy(outdata,data+tot_data,this_ldata);
438 cli_setup_bcc(cli, outdata+this_ldata);
441 * Save the mid we're using. We need this for finding
446 show_msg(cli->outbuf);
448 if (!cli_send_smb(cli)) {
452 /* Ensure we use the same mid for the secondaries. */
455 tot_data += this_ldata;
456 tot_param += this_lparam;
460 /* Note we're in a trans state. Save the sequence
461 * numbers for replies. */
463 cli_signing_trans_start(cli, mid);
467 /****************************************************************************
468 receive a SMB nttrans response allocating the necessary memory
469 ****************************************************************************/
471 BOOL cli_receive_nt_trans(struct cli_state *cli,
472 char **param, unsigned int *param_len,
473 char **data, unsigned int *data_len)
475 unsigned int total_data=0;
476 unsigned int total_param=0;
477 unsigned int this_data,this_param;
483 *data_len = *param_len = 0;
485 if (!cli_receive_smb(cli)) {
486 cli_signing_trans_stop(cli);
490 show_msg(cli->inbuf);
493 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
494 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
495 CVAL(cli->inbuf,smb_com)));
496 cli_signing_trans_stop(cli);
501 * An NT RPC pipe call can return ERRDOS, ERRmoredata
502 * to a trans call. This is not an error and should not
503 * be treated as such.
505 if (cli_is_dos_error(cli)) {
506 cli_dos_error(cli, &eclass, &ecode);
507 if (cli->nt_pipe_fnum == 0 || !(eclass == ERRDOS && ecode == ERRmoredata)) {
508 cli_signing_trans_stop(cli);
514 * Likewise for NT_STATUS_BUFFER_TOO_SMALL
516 if (cli_is_nt_error(cli)) {
517 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
518 NT_STATUS_BUFFER_TOO_SMALL)) {
519 cli_signing_trans_stop(cli);
524 /* parse out the lengths */
525 total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
526 total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
530 tdata = Realloc(*data,total_data);
532 DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
533 cli_signing_trans_stop(cli);
541 tparam = Realloc(*param,total_param);
543 DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
544 cli_signing_trans_stop(cli);
552 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
553 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
555 if (this_data + *data_len > total_data ||
556 this_param + *param_len > total_param) {
557 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
558 cli_signing_trans_stop(cli);
562 if (this_data + *data_len < this_data ||
563 this_data + *data_len < *data_len ||
564 this_param + *param_len < this_param ||
565 this_param + *param_len < *param_len) {
566 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
567 cli_signing_trans_stop(cli);
572 unsigned int data_offset_out = SVAL(cli->inbuf,smb_ntr_DataDisplacement);
573 unsigned int data_offset_in = SVAL(cli->inbuf,smb_ntr_DataOffset);
575 if (data_offset_out > total_data ||
576 data_offset_out + this_data > total_data ||
577 data_offset_out + this_data < data_offset_out ||
578 data_offset_out + this_data < this_data) {
579 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
580 cli_signing_trans_stop(cli);
583 if (data_offset_in > cli->bufsize ||
584 data_offset_in + this_data > cli->bufsize ||
585 data_offset_in + this_data < data_offset_in ||
586 data_offset_in + this_data < this_data) {
587 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
588 cli_signing_trans_stop(cli);
592 memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
596 unsigned int param_offset_out = SVAL(cli->inbuf,smb_ntr_ParameterDisplacement);
597 unsigned int param_offset_in = SVAL(cli->inbuf,smb_ntr_ParameterOffset);
599 if (param_offset_out > total_param ||
600 param_offset_out + this_param > total_param ||
601 param_offset_out + this_param < param_offset_out ||
602 param_offset_out + this_param < this_param) {
603 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
604 cli_signing_trans_stop(cli);
607 if (param_offset_in > cli->bufsize ||
608 param_offset_in + this_param > cli->bufsize ||
609 param_offset_in + this_param < param_offset_in ||
610 param_offset_in + this_param < this_param) {
611 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
612 cli_signing_trans_stop(cli);
616 memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
619 *data_len += this_data;
620 *param_len += this_param;
622 if (total_data <= *data_len && total_param <= *param_len)
625 if (!cli_receive_smb(cli)) {
626 cli_signing_trans_stop(cli);
630 show_msg(cli->inbuf);
633 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
634 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
635 CVAL(cli->inbuf,smb_com)));
636 cli_signing_trans_stop(cli);
639 if (cli_is_dos_error(cli)) {
640 cli_dos_error(cli, &eclass, &ecode);
641 if(cli->nt_pipe_fnum == 0 || !(eclass == ERRDOS && ecode == ERRmoredata)) {
642 cli_signing_trans_stop(cli);
646 /* parse out the total lengths again - they can shrink! */
647 if (SVAL(cli->inbuf,smb_ntr_TotalDataCount) < total_data)
648 total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
649 if (SVAL(cli->inbuf,smb_ntr_TotalParameterCount) < total_param)
650 total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
652 if (total_data <= *data_len && total_param <= *param_len)
656 cli_signing_trans_stop(cli);