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);
56 pipe_name_len = clistr_push(cli, smb_buf(cli->outbuf), pipe_name, -1, STR_TERMINATE);
59 outparam = smb_buf(cli->outbuf)+(trans==SMBtrans ? pipe_name_len : 3);
60 outdata = outparam+this_lparam;
63 SSVAL(cli->outbuf,smb_tpscnt,lparam); /* tpscnt */
64 SSVAL(cli->outbuf,smb_tdscnt,ldata); /* tdscnt */
65 SSVAL(cli->outbuf,smb_mprcnt,mparam); /* mprcnt */
66 SSVAL(cli->outbuf,smb_mdrcnt,mdata); /* mdrcnt */
67 SCVAL(cli->outbuf,smb_msrcnt,msetup); /* msrcnt */
68 SSVAL(cli->outbuf,smb_flags,flags); /* flags */
69 SIVAL(cli->outbuf,smb_timeout,0); /* timeout */
70 SSVAL(cli->outbuf,smb_pscnt,this_lparam); /* pscnt */
71 SSVAL(cli->outbuf,smb_psoff,smb_offset(outparam,cli->outbuf)); /* psoff */
72 SSVAL(cli->outbuf,smb_dscnt,this_ldata); /* dscnt */
73 SSVAL(cli->outbuf,smb_dsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
74 SCVAL(cli->outbuf,smb_suwcnt,lsetup); /* suwcnt */
75 for (i=0;i<lsetup;i++) /* setup[] */
76 SSVAL(cli->outbuf,smb_setup+i*2,setup[i]);
77 p = smb_buf(cli->outbuf);
78 if (trans != SMBtrans) {
79 *p++ = 0; /* put in a null smb_name */
80 *p++ = 'D'; *p++ = ' '; /* observed in OS/2 */
82 if (this_lparam) /* param[] */
83 memcpy(outparam,param,this_lparam);
84 if (this_ldata) /* data[] */
85 memcpy(outdata,data,this_ldata);
86 cli_setup_bcc(cli, outdata+this_ldata);
88 show_msg(cli->outbuf);
90 cli_signing_trans_start(cli);
91 if (!cli_send_smb(cli)) {
92 cli_signing_trans_stop(cli);
96 if (this_ldata < ldata || this_lparam < lparam) {
97 /* receive interim response */
98 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
99 cli_signing_trans_stop(cli);
103 tot_data = this_ldata;
104 tot_param = this_lparam;
106 while (tot_data < ldata || tot_param < lparam) {
107 this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
108 this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
110 set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
111 SCVAL(cli->outbuf,smb_com,(trans==SMBtrans ? SMBtranss : SMBtranss2));
113 outparam = smb_buf(cli->outbuf);
114 outdata = outparam+this_lparam;
116 /* secondary request */
117 SSVAL(cli->outbuf,smb_tpscnt,lparam); /* tpscnt */
118 SSVAL(cli->outbuf,smb_tdscnt,ldata); /* tdscnt */
119 SSVAL(cli->outbuf,smb_spscnt,this_lparam); /* pscnt */
120 SSVAL(cli->outbuf,smb_spsoff,smb_offset(outparam,cli->outbuf)); /* psoff */
121 SSVAL(cli->outbuf,smb_spsdisp,tot_param); /* psdisp */
122 SSVAL(cli->outbuf,smb_sdscnt,this_ldata); /* dscnt */
123 SSVAL(cli->outbuf,smb_sdsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
124 SSVAL(cli->outbuf,smb_sdsdisp,tot_data); /* dsdisp */
125 if (trans==SMBtrans2)
126 SSVALS(cli->outbuf,smb_sfid,fid); /* fid */
127 if (this_lparam) /* param[] */
128 memcpy(outparam,param+tot_param,this_lparam);
129 if (this_ldata) /* data[] */
130 memcpy(outdata,data+tot_data,this_ldata);
131 cli_setup_bcc(cli, outdata+this_ldata);
133 /* Ensure this packet has the same MID as
134 * the primary. Important in signing. JRA. */
137 show_msg(cli->outbuf);
138 if (!cli_send_smb(cli)) {
139 cli_signing_trans_stop(cli);
143 tot_data += this_ldata;
144 tot_param += this_lparam;
151 /****************************************************************************
152 Receive a SMB trans or trans2 response allocating the necessary memory.
153 ****************************************************************************/
155 BOOL cli_receive_trans(struct cli_state *cli,int trans,
156 char **param, unsigned int *param_len,
157 char **data, unsigned int *data_len)
159 unsigned int total_data=0;
160 unsigned int total_param=0;
161 unsigned int this_data,this_param;
166 *data_len = *param_len = 0;
168 if (!cli_receive_smb(cli)) {
169 cli_signing_trans_stop(cli);
173 show_msg(cli->inbuf);
176 if (CVAL(cli->inbuf,smb_com) != trans) {
177 DEBUG(0,("Expected %s response, got command 0x%02x\n",
178 trans==SMBtrans?"SMBtrans":"SMBtrans2",
179 CVAL(cli->inbuf,smb_com)));
180 cli_signing_trans_stop(cli);
185 * An NT RPC pipe call can return ERRDOS, ERRmoredata
186 * to a trans call. This is not an error and should not
187 * be treated as such.
189 status = cli_nt_error(cli);
191 if (NT_STATUS_IS_ERR(status)) {
192 cli_signing_trans_stop(cli);
196 /* parse out the lengths */
197 total_data = SVAL(cli->inbuf,smb_tdrcnt);
198 total_param = SVAL(cli->inbuf,smb_tprcnt);
202 tdata = Realloc(*data,total_data);
204 DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
205 cli_signing_trans_stop(cli);
212 if (total_param!=0) {
213 tparam = Realloc(*param,total_param);
215 DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
216 cli_signing_trans_stop(cli);
224 this_data = SVAL(cli->inbuf,smb_drcnt);
225 this_param = SVAL(cli->inbuf,smb_prcnt);
227 if (this_data + *data_len > total_data ||
228 this_param + *param_len > total_param) {
229 DEBUG(1,("Data overflow in cli_receive_trans\n"));
230 cli_signing_trans_stop(cli);
234 if (this_data + *data_len < this_data ||
235 this_data + *data_len < *data_len ||
236 this_param + *param_len < this_param ||
237 this_param + *param_len < *param_len) {
238 DEBUG(1,("Data overflow in cli_receive_trans\n"));
239 cli_signing_trans_stop(cli);
244 unsigned int data_offset_out = SVAL(cli->inbuf,smb_drdisp);
245 unsigned int data_offset_in = SVAL(cli->inbuf,smb_droff);
247 if (data_offset_out > total_data ||
248 data_offset_out + this_data > total_data ||
249 data_offset_out + this_data < data_offset_out ||
250 data_offset_out + this_data < this_data) {
251 DEBUG(1,("Data overflow in cli_receive_trans\n"));
252 cli_signing_trans_stop(cli);
255 if (data_offset_in > cli->bufsize ||
256 data_offset_in + this_data > cli->bufsize ||
257 data_offset_in + this_data < data_offset_in ||
258 data_offset_in + this_data < this_data) {
259 DEBUG(1,("Data overflow in cli_receive_trans\n"));
260 cli_signing_trans_stop(cli);
264 memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
267 unsigned int param_offset_out = SVAL(cli->inbuf,smb_prdisp);
268 unsigned int param_offset_in = SVAL(cli->inbuf,smb_proff);
270 if (param_offset_out > total_param ||
271 param_offset_out + this_param > total_param ||
272 param_offset_out + this_param < param_offset_out ||
273 param_offset_out + this_param < this_param) {
274 DEBUG(1,("Param overflow in cli_receive_trans\n"));
275 cli_signing_trans_stop(cli);
278 if (param_offset_in > cli->bufsize ||
279 param_offset_in + this_param > cli->bufsize ||
280 param_offset_in + this_param < param_offset_in ||
281 param_offset_in + this_param < this_param) {
282 DEBUG(1,("Param overflow in cli_receive_trans\n"));
283 cli_signing_trans_stop(cli);
287 memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
289 *data_len += this_data;
290 *param_len += this_param;
292 if (total_data <= *data_len && total_param <= *param_len)
295 if (!cli_receive_smb(cli)) {
296 cli_signing_trans_stop(cli);
300 show_msg(cli->inbuf);
303 if (CVAL(cli->inbuf,smb_com) != trans) {
304 DEBUG(0,("Expected %s response, got command 0x%02x\n",
305 trans==SMBtrans?"SMBtrans":"SMBtrans2",
306 CVAL(cli->inbuf,smb_com)));
307 cli_signing_trans_stop(cli);
310 if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
311 cli_signing_trans_stop(cli);
315 /* parse out the total lengths again - they can shrink! */
316 if (SVAL(cli->inbuf,smb_tdrcnt) < total_data)
317 total_data = SVAL(cli->inbuf,smb_tdrcnt);
318 if (SVAL(cli->inbuf,smb_tprcnt) < total_param)
319 total_param = SVAL(cli->inbuf,smb_tprcnt);
321 if (total_data <= *data_len && total_param <= *param_len)
326 cli_signing_trans_stop(cli);
330 /****************************************************************************
331 Send a SMB nttrans request.
332 ****************************************************************************/
334 BOOL cli_send_nt_trans(struct cli_state *cli,
337 uint16 *setup, unsigned int lsetup, unsigned int msetup,
338 char *param, unsigned int lparam, unsigned int mparam,
339 char *data, unsigned int ldata, unsigned int mdata)
342 unsigned int this_ldata,this_lparam;
343 unsigned int tot_data=0,tot_param=0;
345 char *outdata,*outparam;
347 this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
348 this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
350 memset(cli->outbuf,'\0',smb_size);
351 set_message(cli->outbuf,19+lsetup,0,True);
352 SCVAL(cli->outbuf,smb_com,SMBnttrans);
353 SSVAL(cli->outbuf,smb_tid, cli->cnum);
354 cli_setup_packet(cli);
357 outparam = smb_buf(cli->outbuf)+3;
358 outdata = outparam+this_lparam;
360 /* primary request */
361 SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
362 SCVAL(cli->outbuf,smb_nt_Flags,flags);
363 SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
364 SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
365 SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
366 SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
367 SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
368 SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
369 SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
370 SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
371 SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
372 SIVAL(cli->outbuf,smb_nt_Function, function);
373 for (i=0;i<lsetup;i++) /* setup[] */
374 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
376 if (this_lparam) /* param[] */
377 memcpy(outparam,param,this_lparam);
378 if (this_ldata) /* data[] */
379 memcpy(outdata,data,this_ldata);
381 cli_setup_bcc(cli, outdata+this_ldata);
383 show_msg(cli->outbuf);
384 cli_signing_trans_start(cli);
385 if (!cli_send_smb(cli)) {
386 cli_signing_trans_stop(cli);
390 if (this_ldata < ldata || this_lparam < lparam) {
391 /* receive interim response */
392 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
393 cli_signing_trans_stop(cli);
397 tot_data = this_ldata;
398 tot_param = this_lparam;
400 while (tot_data < ldata || tot_param < lparam) {
401 this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
402 this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
404 set_message(cli->outbuf,18,0,True);
405 SCVAL(cli->outbuf,smb_com,SMBnttranss);
407 /* XXX - these should probably be aligned */
408 outparam = smb_buf(cli->outbuf);
409 outdata = outparam+this_lparam;
411 /* secondary request */
412 SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
413 SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
414 SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
415 SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
416 SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
417 SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
418 SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
419 SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
420 if (this_lparam) /* param[] */
421 memcpy(outparam,param+tot_param,this_lparam);
422 if (this_ldata) /* data[] */
423 memcpy(outdata,data+tot_data,this_ldata);
424 cli_setup_bcc(cli, outdata+this_ldata);
426 /* Ensure this packet has the same MID as
427 * the primary. Important in signing. JRA. */
430 show_msg(cli->outbuf);
432 if (!cli_send_smb(cli)) {
433 cli_signing_trans_stop(cli);
437 tot_data += this_ldata;
438 tot_param += this_lparam;
445 /****************************************************************************
446 receive a SMB nttrans response allocating the necessary memory
447 ****************************************************************************/
449 BOOL cli_receive_nt_trans(struct cli_state *cli,
450 char **param, unsigned int *param_len,
451 char **data, unsigned int *data_len)
453 unsigned int total_data=0;
454 unsigned int total_param=0;
455 unsigned int this_data,this_param;
461 *data_len = *param_len = 0;
463 if (!cli_receive_smb(cli)) {
464 cli_signing_trans_stop(cli);
468 show_msg(cli->inbuf);
471 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
472 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
473 CVAL(cli->inbuf,smb_com)));
474 cli_signing_trans_stop(cli);
479 * An NT RPC pipe call can return ERRDOS, ERRmoredata
480 * to a trans call. This is not an error and should not
481 * be treated as such.
483 if (cli_is_dos_error(cli)) {
484 cli_dos_error(cli, &eclass, &ecode);
485 if (cli->nt_pipe_fnum == 0 || !(eclass == ERRDOS && ecode == ERRmoredata)) {
486 cli_signing_trans_stop(cli);
492 * Likewise for NT_STATUS_BUFFER_TOO_SMALL
494 if (cli_is_nt_error(cli)) {
495 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
496 NT_STATUS_BUFFER_TOO_SMALL)) {
497 cli_signing_trans_stop(cli);
502 /* parse out the lengths */
503 total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
504 total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
508 tdata = Realloc(*data,total_data);
510 DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
511 cli_signing_trans_stop(cli);
519 tparam = Realloc(*param,total_param);
521 DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
522 cli_signing_trans_stop(cli);
530 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
531 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
533 if (this_data + *data_len > total_data ||
534 this_param + *param_len > total_param) {
535 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
536 cli_signing_trans_stop(cli);
540 if (this_data + *data_len < this_data ||
541 this_data + *data_len < *data_len ||
542 this_param + *param_len < this_param ||
543 this_param + *param_len < *param_len) {
544 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
545 cli_signing_trans_stop(cli);
550 unsigned int data_offset_out = SVAL(cli->inbuf,smb_ntr_DataDisplacement);
551 unsigned int data_offset_in = SVAL(cli->inbuf,smb_ntr_DataOffset);
553 if (data_offset_out > total_data ||
554 data_offset_out + this_data > total_data ||
555 data_offset_out + this_data < data_offset_out ||
556 data_offset_out + this_data < this_data) {
557 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
558 cli_signing_trans_stop(cli);
561 if (data_offset_in > cli->bufsize ||
562 data_offset_in + this_data > cli->bufsize ||
563 data_offset_in + this_data < data_offset_in ||
564 data_offset_in + this_data < this_data) {
565 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
566 cli_signing_trans_stop(cli);
570 memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
574 unsigned int param_offset_out = SVAL(cli->inbuf,smb_ntr_ParameterDisplacement);
575 unsigned int param_offset_in = SVAL(cli->inbuf,smb_ntr_ParameterOffset);
577 if (param_offset_out > total_param ||
578 param_offset_out + this_param > total_param ||
579 param_offset_out + this_param < param_offset_out ||
580 param_offset_out + this_param < this_param) {
581 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
582 cli_signing_trans_stop(cli);
585 if (param_offset_in > cli->bufsize ||
586 param_offset_in + this_param > cli->bufsize ||
587 param_offset_in + this_param < param_offset_in ||
588 param_offset_in + this_param < this_param) {
589 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
590 cli_signing_trans_stop(cli);
594 memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
597 *data_len += this_data;
598 *param_len += this_param;
600 if (total_data <= *data_len && total_param <= *param_len)
603 if (!cli_receive_smb(cli)) {
604 cli_signing_trans_stop(cli);
608 show_msg(cli->inbuf);
611 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
612 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
613 CVAL(cli->inbuf,smb_com)));
614 cli_signing_trans_stop(cli);
617 if (cli_is_dos_error(cli)) {
618 cli_dos_error(cli, &eclass, &ecode);
619 if(cli->nt_pipe_fnum == 0 || !(eclass == ERRDOS && ecode == ERRmoredata)) {
620 cli_signing_trans_stop(cli);
624 /* parse out the total lengths again - they can shrink! */
625 if (SVAL(cli->inbuf,smb_ntr_TotalDataCount) < total_data)
626 total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
627 if (SVAL(cli->inbuf,smb_ntr_TotalParameterCount) < total_param)
628 total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
630 if (total_data <= *data_len && total_param <= *param_len)
634 cli_signing_trans_stop(cli);