r15018: Merge Volker's ipc/trans2/nttrans changes over
[sfrench/samba-autobuild/.git] / source / libsmb / clitrans.c
1 /* 
2    Unix SMB/CIFS implementation.
3    client transaction calls
4    Copyright (C) Andrew Tridgell 1994-1998
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 2 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, write to the Free Software
18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21 #include "includes.h"
22
23
24 /****************************************************************************
25  Send a SMB trans or trans2 request.
26 ****************************************************************************/
27
28 BOOL cli_send_trans(struct cli_state *cli, int trans, 
29                     const char *pipe_name, 
30                     int fid, int flags,
31                     uint16 *setup, unsigned int lsetup, unsigned int msetup,
32                     const char *param, unsigned int lparam, unsigned int mparam,
33                     const char *data, unsigned int ldata, unsigned int mdata)
34 {
35         unsigned int i;
36         unsigned int this_ldata,this_lparam;
37         unsigned int tot_data=0,tot_param=0;
38         char *outdata,*outparam;
39         char *p;
40         int pipe_name_len=0;
41         uint16 mid;
42
43         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
44         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
45
46         memset(cli->outbuf,'\0',smb_size);
47         set_message(cli->outbuf,14+lsetup,0,True);
48         SCVAL(cli->outbuf,smb_com,trans);
49         SSVAL(cli->outbuf,smb_tid, cli->cnum);
50         cli_setup_packet(cli);
51
52         /*
53          * Save the mid we're using. We need this for finding
54          * signing replies.
55          */
56
57         mid = cli->mid;
58
59         if (pipe_name) {
60                 pipe_name_len = clistr_push(cli, smb_buf(cli->outbuf), pipe_name, -1, STR_TERMINATE);
61         }
62
63         outparam = smb_buf(cli->outbuf)+(trans==SMBtrans ? pipe_name_len : 3);
64         outdata = outparam+this_lparam;
65
66         /* primary request */
67         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
68         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
69         SSVAL(cli->outbuf,smb_mprcnt,mparam);   /* mprcnt */
70         SSVAL(cli->outbuf,smb_mdrcnt,mdata);    /* mdrcnt */
71         SCVAL(cli->outbuf,smb_msrcnt,msetup);   /* msrcnt */
72         SSVAL(cli->outbuf,smb_flags,flags);     /* flags */
73         SIVAL(cli->outbuf,smb_timeout,0);               /* timeout */
74         SSVAL(cli->outbuf,smb_pscnt,this_lparam);       /* pscnt */
75         SSVAL(cli->outbuf,smb_psoff,smb_offset(outparam,cli->outbuf)); /* psoff */
76         SSVAL(cli->outbuf,smb_dscnt,this_ldata);        /* dscnt */
77         SSVAL(cli->outbuf,smb_dsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
78         SCVAL(cli->outbuf,smb_suwcnt,lsetup);   /* suwcnt */
79         for (i=0;i<lsetup;i++)          /* setup[] */
80                 SSVAL(cli->outbuf,smb_setup+i*2,setup[i]);
81         p = smb_buf(cli->outbuf);
82         if (trans != SMBtrans) {
83                 *p++ = 0;  /* put in a null smb_name */
84                 *p++ = 'D'; *p++ = ' '; /* observed in OS/2 */
85         }
86         if (this_lparam)                        /* param[] */
87                 memcpy(outparam,param,this_lparam);
88         if (this_ldata)                 /* data[] */
89                 memcpy(outdata,data,this_ldata);
90         cli_setup_bcc(cli, outdata+this_ldata);
91
92         show_msg(cli->outbuf);
93
94         if (!cli_send_smb(cli)) {
95                 return False;
96         }
97
98         if (this_ldata < ldata || this_lparam < lparam) {
99                 /* receive interim response */
100                 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
101                         return(False);
102                 }
103
104                 tot_data = this_ldata;
105                 tot_param = this_lparam;
106                 
107                 while (tot_data < ldata || tot_param < lparam)  {
108                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
109                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
110
111                         set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
112                         SCVAL(cli->outbuf,smb_com,(trans==SMBtrans ? SMBtranss : SMBtranss2));
113                         
114                         outparam = smb_buf(cli->outbuf);
115                         outdata = outparam+this_lparam;
116                         
117                         /* secondary request */
118                         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
119                         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
120                         SSVAL(cli->outbuf,smb_spscnt,this_lparam);      /* pscnt */
121                         SSVAL(cli->outbuf,smb_spsoff,smb_offset(outparam,cli->outbuf)); /* psoff */
122                         SSVAL(cli->outbuf,smb_spsdisp,tot_param);       /* psdisp */
123                         SSVAL(cli->outbuf,smb_sdscnt,this_ldata);       /* dscnt */
124                         SSVAL(cli->outbuf,smb_sdsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
125                         SSVAL(cli->outbuf,smb_sdsdisp,tot_data);        /* dsdisp */
126                         if (trans==SMBtrans2)
127                                 SSVALS(cli->outbuf,smb_sfid,fid);               /* fid */
128                         if (this_lparam)                        /* param[] */
129                                 memcpy(outparam,param+tot_param,this_lparam);
130                         if (this_ldata)                 /* data[] */
131                                 memcpy(outdata,data+tot_data,this_ldata);
132                         cli_setup_bcc(cli, outdata+this_ldata);
133                         
134                         /*
135                          * Save the mid we're using. We need this for finding
136                          * signing replies.
137                          */
138                         mid = cli->mid;
139
140                         show_msg(cli->outbuf);
141                         if (!cli_send_smb(cli)) {
142                                 return False;
143                         }
144
145                         /* Ensure we use the same mid for the secondaries. */
146                         cli->mid = mid;
147                         
148                         tot_data += this_ldata;
149                         tot_param += this_lparam;
150                 }
151         }
152
153         /* Note we're in a trans state. Save the sequence
154          * numbers for replies. */
155
156         return(True);
157 }
158
159 /****************************************************************************
160  Receive a SMB trans or trans2 response allocating the necessary memory.
161 ****************************************************************************/
162
163 BOOL cli_receive_trans(struct cli_state *cli,int trans,
164                               char **param, unsigned int *param_len,
165                               char **data, unsigned int *data_len)
166 {
167         unsigned int total_data=0;
168         unsigned int total_param=0;
169         unsigned int this_data,this_param;
170         NTSTATUS status;
171
172         *data_len = *param_len = 0;
173
174         if (!cli_receive_smb(cli)) {
175                 return False;
176         }
177
178         show_msg(cli->inbuf);
179         
180         /* sanity check */
181         if (CVAL(cli->inbuf,smb_com) != trans) {
182                 DEBUG(0,("Expected %s response, got command 0x%02x\n",
183                          trans==SMBtrans?"SMBtrans":"SMBtrans2", 
184                          CVAL(cli->inbuf,smb_com)));
185                 return(False);
186         }
187
188         /*
189          * An NT RPC pipe call can return ERRDOS, ERRmoredata
190          * to a trans call. This is not an error and should not
191          * be treated as such. Note that STATUS_NO_MORE_FILES is
192          * returned when a trans2 findfirst/next finishes.
193          */
194         status = cli_nt_error(cli);
195         
196         if (NT_STATUS_IS_ERR(status) || NT_STATUS_EQUAL(status,STATUS_NO_MORE_FILES)) {
197                 return False;
198         }
199
200         /* parse out the lengths */
201         total_data = SVAL(cli->inbuf,smb_tdrcnt);
202         total_param = SVAL(cli->inbuf,smb_tprcnt);
203
204         /* allocate it */
205         if (total_data!=0) {
206                 *data = SMB_REALLOC(*data,total_data);
207                 if (!(*data)) {
208                         DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
209                         return False;
210                 }
211         }
212
213         if (total_param!=0) {
214                 *param = SMB_REALLOC(*param,total_param);
215                 if (!(*param)) {
216                         DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
217                         return False;
218                 }
219         }
220
221         for (;;)  {
222                 this_data = SVAL(cli->inbuf,smb_drcnt);
223                 this_param = SVAL(cli->inbuf,smb_prcnt);
224
225                 if (this_data + *data_len > total_data ||
226                     this_param + *param_len > total_param) {
227                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
228                         return False;
229                 }
230
231                 if (this_data + *data_len < this_data ||
232                                 this_data + *data_len < *data_len ||
233                                 this_param + *param_len < this_param ||
234                                 this_param + *param_len < *param_len) {
235                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
236                         return False;
237                 }
238
239                 if (this_data) {
240                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_drdisp);
241                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_droff);
242
243                         if (data_offset_out > total_data ||
244                                         data_offset_out + this_data > total_data ||
245                                         data_offset_out + this_data < data_offset_out ||
246                                         data_offset_out + this_data < this_data) {
247                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
248                                 return False;
249                         }
250                         if (data_offset_in > cli->bufsize ||
251                                         data_offset_in + this_data >  cli->bufsize ||
252                                         data_offset_in + this_data < data_offset_in ||
253                                         data_offset_in + this_data < this_data) {
254                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
255                                 return False;
256                         }
257
258                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
259                 }
260                 if (this_param) {
261                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_prdisp);
262                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_proff);
263
264                         if (param_offset_out > total_param ||
265                                         param_offset_out + this_param > total_param ||
266                                         param_offset_out + this_param < param_offset_out ||
267                                         param_offset_out + this_param < this_param) {
268                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
269                                 return False;
270                         }
271                         if (param_offset_in > cli->bufsize ||
272                                         param_offset_in + this_param >  cli->bufsize ||
273                                         param_offset_in + this_param < param_offset_in ||
274                                         param_offset_in + this_param < this_param) {
275                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
276                                 return False;
277                         }
278
279                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
280                 }
281                 *data_len += this_data;
282                 *param_len += this_param;
283
284                 if (total_data <= *data_len && total_param <= *param_len)
285                         break;
286                 
287                 if (!cli_receive_smb(cli)) {
288                         return False;   
289                 }
290
291                 show_msg(cli->inbuf);
292                 
293                 /* sanity check */
294                 if (CVAL(cli->inbuf,smb_com) != trans) {
295                         DEBUG(0,("Expected %s response, got command 0x%02x\n",
296                                  trans==SMBtrans?"SMBtrans":"SMBtrans2", 
297                                  CVAL(cli->inbuf,smb_com)));
298                         return(False);
299                 }
300                 if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
301                         return(False);
302                 }
303
304                 /* parse out the total lengths again - they can shrink! */
305                 if (SVAL(cli->inbuf,smb_tdrcnt) < total_data)
306                         total_data = SVAL(cli->inbuf,smb_tdrcnt);
307                 if (SVAL(cli->inbuf,smb_tprcnt) < total_param)
308                         total_param = SVAL(cli->inbuf,smb_tprcnt);
309                 
310                 if (total_data <= *data_len && total_param <= *param_len)
311                         break;
312                 
313         }
314
315         return(True);
316 }
317
318 /****************************************************************************
319  Send a SMB nttrans request.
320 ****************************************************************************/
321
322 BOOL cli_send_nt_trans(struct cli_state *cli, 
323                        int function, 
324                        int flags,
325                        uint16 *setup, unsigned int lsetup, unsigned int msetup,
326                        char *param, unsigned int lparam, unsigned int mparam,
327                        char *data, unsigned int ldata, unsigned int mdata)
328 {
329         unsigned int i;
330         unsigned int this_ldata,this_lparam;
331         unsigned int tot_data=0,tot_param=0;
332         uint16 mid;
333         char *outdata,*outparam;
334
335         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
336         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
337
338         memset(cli->outbuf,'\0',smb_size);
339         set_message(cli->outbuf,19+lsetup,0,True);
340         SCVAL(cli->outbuf,smb_com,SMBnttrans);
341         SSVAL(cli->outbuf,smb_tid, cli->cnum);
342         cli_setup_packet(cli);
343
344         /*
345          * Save the mid we're using. We need this for finding
346          * signing replies.
347          */
348
349         mid = cli->mid;
350
351         outparam = smb_buf(cli->outbuf)+3;
352         outdata = outparam+this_lparam;
353
354         /* primary request */
355         SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
356         SCVAL(cli->outbuf,smb_nt_Flags,flags);
357         SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
358         SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
359         SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
360         SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
361         SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
362         SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
363         SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
364         SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
365         SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
366         SIVAL(cli->outbuf,smb_nt_Function, function);
367         for (i=0;i<lsetup;i++)          /* setup[] */
368                 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
369         
370         if (this_lparam)                        /* param[] */
371                 memcpy(outparam,param,this_lparam);
372         if (this_ldata)                 /* data[] */
373                 memcpy(outdata,data,this_ldata);
374
375         cli_setup_bcc(cli, outdata+this_ldata);
376
377         show_msg(cli->outbuf);
378         if (!cli_send_smb(cli)) {
379                 return False;
380         }       
381
382         if (this_ldata < ldata || this_lparam < lparam) {
383                 /* receive interim response */
384                 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
385                         return(False);
386                 }
387
388                 tot_data = this_ldata;
389                 tot_param = this_lparam;
390                 
391                 while (tot_data < ldata || tot_param < lparam)  {
392                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
393                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
394
395                         set_message(cli->outbuf,18,0,True);
396                         SCVAL(cli->outbuf,smb_com,SMBnttranss);
397
398                         /* XXX - these should probably be aligned */
399                         outparam = smb_buf(cli->outbuf);
400                         outdata = outparam+this_lparam;
401                         
402                         /* secondary request */
403                         SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
404                         SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
405                         SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
406                         SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
407                         SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
408                         SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
409                         SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
410                         SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
411                         if (this_lparam)                        /* param[] */
412                                 memcpy(outparam,param+tot_param,this_lparam);
413                         if (this_ldata)                 /* data[] */
414                                 memcpy(outdata,data+tot_data,this_ldata);
415                         cli_setup_bcc(cli, outdata+this_ldata);
416                         
417                         /*
418                          * Save the mid we're using. We need this for finding
419                          * signing replies.
420                          */
421                         mid = cli->mid;
422
423                         show_msg(cli->outbuf);
424
425                         if (!cli_send_smb(cli)) {
426                                 return False;
427                         }
428                         
429                         /* Ensure we use the same mid for the secondaries. */
430                         cli->mid = mid;
431                         
432                         tot_data += this_ldata;
433                         tot_param += this_lparam;
434                 }
435         }
436
437         /* Note we're in a trans state. Save the sequence
438          * numbers for replies. */
439
440         return(True);
441 }
442
443 /****************************************************************************
444  Receive a SMB nttrans response allocating the necessary memory.
445 ****************************************************************************/
446
447 BOOL cli_receive_nt_trans(struct cli_state *cli,
448                           char **param, unsigned int *param_len,
449                           char **data, unsigned int *data_len)
450 {
451         unsigned int total_data=0;
452         unsigned int total_param=0;
453         unsigned int this_data,this_param;
454         uint8 eclass;
455         uint32 ecode;
456
457         *data_len = *param_len = 0;
458
459         if (!cli_receive_smb(cli)) {
460                 return False;
461         }
462
463         show_msg(cli->inbuf);
464         
465         /* sanity check */
466         if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
467                 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
468                          CVAL(cli->inbuf,smb_com)));
469                 return(False);
470         }
471
472         /*
473          * An NT RPC pipe call can return ERRDOS, ERRmoredata
474          * to a trans call. This is not an error and should not
475          * be treated as such.
476          */
477         if (cli_is_dos_error(cli)) {
478                 cli_dos_error(cli, &eclass, &ecode);
479                 if (!(eclass == ERRDOS && ecode == ERRmoredata)) {
480                         return(False);
481                 }
482         }
483
484         /*
485          * Likewise for NT_STATUS_BUFFER_TOO_SMALL
486          */
487         if (cli_is_nt_error(cli)) {
488                 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
489                                      NT_STATUS_BUFFER_TOO_SMALL)) {
490                         return(False);
491                 }
492         }
493
494         /* parse out the lengths */
495         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
496         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
497
498         /* allocate it */
499         if (total_data) {
500                 *data = SMB_REALLOC(*data,total_data);
501                 if (!(*data)) {
502                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
503                         return False;
504                 }
505         }
506
507         if (total_param) {
508                 *param = SMB_REALLOC(*param,total_param);
509                 if (!(*param)) {
510                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
511                         return False;
512                 }
513         }
514
515         while (1)  {
516                 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
517                 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
518
519                 if (this_data + *data_len > total_data ||
520                     this_param + *param_len > total_param) {
521                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
522                         return False;
523                 }
524
525                 if (this_data + *data_len < this_data ||
526                                 this_data + *data_len < *data_len ||
527                                 this_param + *param_len < this_param ||
528                                 this_param + *param_len < *param_len) {
529                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
530                         return False;
531                 }
532
533                 if (this_data) {
534                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_ntr_DataDisplacement);
535                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_ntr_DataOffset);
536
537                         if (data_offset_out > total_data ||
538                                         data_offset_out + this_data > total_data ||
539                                         data_offset_out + this_data < data_offset_out ||
540                                         data_offset_out + this_data < this_data) {
541                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
542                                 return False;
543                         }
544                         if (data_offset_in > cli->bufsize ||
545                                         data_offset_in + this_data >  cli->bufsize ||
546                                         data_offset_in + this_data < data_offset_in ||
547                                         data_offset_in + this_data < this_data) {
548                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
549                                 return False;
550                         }
551
552                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
553                 }
554
555                 if (this_param) {
556                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_ntr_ParameterDisplacement);
557                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_ntr_ParameterOffset);
558
559                         if (param_offset_out > total_param ||
560                                         param_offset_out + this_param > total_param ||
561                                         param_offset_out + this_param < param_offset_out ||
562                                         param_offset_out + this_param < this_param) {
563                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
564                                 return False;
565                         }
566                         if (param_offset_in > cli->bufsize ||
567                                         param_offset_in + this_param >  cli->bufsize ||
568                                         param_offset_in + this_param < param_offset_in ||
569                                         param_offset_in + this_param < this_param) {
570                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
571                                 return False;
572                         }
573
574                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
575                 }
576
577                 *data_len += this_data;
578                 *param_len += this_param;
579
580                 if (total_data <= *data_len && total_param <= *param_len)
581                         break;
582                 
583                 if (!cli_receive_smb(cli)) {
584                         return False;
585                 }
586
587                 show_msg(cli->inbuf);
588                 
589                 /* sanity check */
590                 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
591                         DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
592                                  CVAL(cli->inbuf,smb_com)));
593                         return(False);
594                 }
595                 if (cli_is_dos_error(cli)) {
596                         cli_dos_error(cli, &eclass, &ecode);
597                         if(!(eclass == ERRDOS && ecode == ERRmoredata)) {
598                                 return(False);
599                         }
600                 }
601                 /*
602                  * Likewise for NT_STATUS_BUFFER_TOO_SMALL
603                  */
604                 if (cli_is_nt_error(cli)) {
605                         if (!NT_STATUS_EQUAL(cli_nt_error(cli),
606                                              NT_STATUS_BUFFER_TOO_SMALL)) {
607                                 return(False);
608                         }
609                 }
610
611                 /* parse out the total lengths again - they can shrink! */
612                 if (SVAL(cli->inbuf,smb_ntr_TotalDataCount) < total_data)
613                         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
614                 if (SVAL(cli->inbuf,smb_ntr_TotalParameterCount) < total_param)
615                         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
616                 
617                 if (total_data <= *data_len && total_param <= *param_len)
618                         break;
619         }
620
621         return(True);
622 }