summaryrefslogtreecommitdiff
path: root/source3/rpc_server/srv_pipe.c
blob: c97619c4b6c4085c4a1815a9574724785432ac61 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
/* 
 *  Unix SMB/Netbios implementation.
 *  Version 1.9.
 *  RPC Pipe client / server routines
 *  Copyright (C) Andrew Tridgell              1992-1998
 *  Copyright (C) Luke Kenneth Casson Leighton 1996-1998,
 *  Copyright (C) Paul Ashton                  1997-1998.
 *  Copyright (C) Jeremy Allison                    1999.
 *  
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *  
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*  this module apparently provides an implementation of DCE/RPC over a
 *  named pipe (IPC$ connection using SMBtrans).  details of DCE/RPC
 *  documentation are available (in on-line form) from the X-Open group.
 *
 *  this module should provide a level of abstraction between SMB
 *  and DCE/RPC, while minimising the amount of mallocs, unnecessary
 *  data copies, and network traffic.
 *
 *  in this version, which takes a "let's learn what's going on and
 *  get something running" approach, there is additional network
 *  traffic generated, but the code should be easier to understand...
 *
 *  ... if you read the docs.  or stare at packets for weeks on end.
 *
 */

#include "includes.h"

static void NTLMSSPcalc_p( pipes_struct *p, unsigned char *data, int len)
{
    unsigned char *hash = p->ntlmssp_hash;
    unsigned char index_i = hash[256];
    unsigned char index_j = hash[257];
    int ind;

    for( ind = 0; ind < len; ind++) {
        unsigned char tc;
        unsigned char t;

        index_i++;
        index_j += hash[index_i];

        tc = hash[index_i];
        hash[index_i] = hash[index_j];
        hash[index_j] = tc;

        t = hash[index_i] + hash[index_j];
        data[ind] = data[ind] ^ hash[t];
    }

    hash[256] = index_i;
    hash[257] = index_j;
}

/*******************************************************************
 Generate the next PDU to be returned from the data in p->rdata. 
 We cheat here as this function doesn't handle the special auth
 footers of the authenticated bind response reply.
 ********************************************************************/

BOOL create_next_pdu(pipes_struct *p)
{
	RPC_HDR_RESP hdr_resp;
	BOOL auth_verify = ((p->ntlmssp_chal_flags & NTLMSSP_NEGOTIATE_SIGN) != 0);
	BOOL auth_seal   = ((p->ntlmssp_chal_flags & NTLMSSP_NEGOTIATE_SEAL) != 0);
	uint32 data_len;
	uint32 data_space_available;
	uint32 data_len_left;
	prs_struct outgoing_pdu;
	char *data;
	char *data_from;
	uint32 data_pos;

	/*
	 * If we're in the fault state, keep returning fault PDU's until
	 * the pipe gets closed. JRA.
	 */

	if(p->fault_state) {
		setup_fault_pdu(p, NT_STATUS(0x1c010002));
		return True;
	}

	memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));

	/* Change the incoming request header to a response. */
	p->hdr.pkt_type = RPC_RESPONSE;

	/* Set up rpc header flags. */
	if (p->out_data.data_sent_length == 0)
		p->hdr.flags = RPC_FLG_FIRST;
	else
		p->hdr.flags = 0;

	/*
	 * Work out how much we can fit in a single PDU.
	 */

	data_space_available = sizeof(p->out_data.current_pdu) - RPC_HEADER_LEN - RPC_HDR_RESP_LEN;
	if(p->ntlmssp_auth_validated)
		data_space_available -= (RPC_HDR_AUTH_LEN + RPC_AUTH_NTLMSSP_CHK_LEN);

	/*
	 * The amount we send is the minimum of the available
	 * space and the amount left to send.
	 */

	data_len_left = prs_offset(&p->out_data.rdata) - p->out_data.data_sent_length;

	/*
	 * Ensure there really is data left to send.
	 */

	if(!data_len_left) {
		DEBUG(0,("create_next_pdu: no data left to send !\n"));
		return False;
	}

	data_len = MIN(data_len_left, data_space_available);

	/*
	 * Set up the alloc hint. This should be the data left to
	 * send.
	 */

	hdr_resp.alloc_hint = data_len_left;

	/*
	 * Set up the header lengths.
	 */

	if (p->ntlmssp_auth_validated) {
		p->hdr.frag_len = RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len +
					RPC_HDR_AUTH_LEN + RPC_AUTH_NTLMSSP_CHK_LEN;
		p->hdr.auth_len = RPC_AUTH_NTLMSSP_CHK_LEN;
	} else {
		p->hdr.frag_len = RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len;
		p->hdr.auth_len = 0;
	}

	/*
	 * Work out if this PDU will be the last.
	 */

	if(p->out_data.data_sent_length + data_len >= prs_offset(&p->out_data.rdata))
		p->hdr.flags |= RPC_FLG_LAST;

	/*
	 * Init the parse struct to point at the outgoing
	 * data.
	 */

	prs_init( &outgoing_pdu, 0, p->mem_ctx, MARSHALL);
	prs_give_memory( &outgoing_pdu, (char *)p->out_data.current_pdu, sizeof(p->out_data.current_pdu), False);

	/* Store the header in the data stream. */
	if(!smb_io_rpc_hdr("hdr", &p->hdr, &outgoing_pdu, 0)) {
		DEBUG(0,("create_next_pdu: failed to marshall RPC_HDR.\n"));
		prs_mem_free(&outgoing_pdu);
		return False;
	}

	if(!smb_io_rpc_hdr_resp("resp", &hdr_resp, &outgoing_pdu, 0)) {
		DEBUG(0,("create_next_pdu: failed to marshall RPC_HDR_RESP.\n"));
		prs_mem_free(&outgoing_pdu);
		return False;
	}

	/* Store the current offset. */
	data_pos = prs_offset(&outgoing_pdu);

	/* Copy the data into the PDU. */
	data_from = prs_data_p(&p->out_data.rdata) + p->out_data.data_sent_length;

	if(!prs_append_data(&outgoing_pdu, data_from, data_len)) {
		DEBUG(0,("create_next_pdu: failed to copy %u bytes of data.\n", (unsigned int)data_len));
		prs_mem_free(&outgoing_pdu);
		return False;
	}

	/*
	 * Set data to point to where we copied the data into.
	 */

	data = prs_data_p(&outgoing_pdu) + data_pos;

	if (p->hdr.auth_len > 0) {
		uint32 crc32 = 0;

		DEBUG(5,("create_next_pdu: sign: %s seal: %s data %d auth %d\n",
			 BOOLSTR(auth_verify), BOOLSTR(auth_seal), data_len, p->hdr.auth_len));

		if (auth_seal) {
			crc32 = crc32_calc_buffer(data, data_len);
			NTLMSSPcalc_p(p, (uchar*)data, data_len);
		}

		if (auth_seal || auth_verify) {
			RPC_HDR_AUTH auth_info;

			init_rpc_hdr_auth(&auth_info, NTLMSSP_AUTH_TYPE, NTLMSSP_AUTH_LEVEL, 
					(auth_verify ? RPC_HDR_AUTH_LEN : 0), (auth_verify ? 1 : 0));
			if(!smb_io_rpc_hdr_auth("hdr_auth", &auth_info, &outgoing_pdu, 0)) {
				DEBUG(0,("create_next_pdu: failed to marshall RPC_HDR_AUTH.\n"));
				prs_mem_free(&outgoing_pdu);
				return False;
			}
		}

		if (auth_verify) {
			RPC_AUTH_NTLMSSP_CHK ntlmssp_chk;
			char *auth_data = prs_data_p(&outgoing_pdu);

			p->ntlmssp_seq_num++;
			init_rpc_auth_ntlmssp_chk(&ntlmssp_chk, NTLMSSP_SIGN_VERSION,
					crc32, p->ntlmssp_seq_num++);
			auth_data = prs_data_p(&outgoing_pdu) + prs_offset(&outgoing_pdu) + 4;
			if(!smb_io_rpc_auth_ntlmssp_chk("auth_sign", &ntlmssp_chk, &outgoing_pdu, 0)) {
				DEBUG(0,("create_next_pdu: failed to marshall RPC_AUTH_NTLMSSP_CHK.\n"));
				prs_mem_free(&outgoing_pdu);
				return False;
			}
			NTLMSSPcalc_p(p, (uchar*)auth_data, RPC_AUTH_NTLMSSP_CHK_LEN - 4);
		}
	}

	/*
	 * Setup the counts for this PDU.
	 */

	p->out_data.data_sent_length += data_len;
	p->out_data.current_pdu_len = p->hdr.frag_len;
	p->out_data.current_pdu_sent = 0;

	prs_mem_free(&outgoing_pdu);
	return True;
}

/*******************************************************************
 Process an NTLMSSP authentication response.
 If this function succeeds, the user has been authenticated
 and their domain, name and calling workstation stored in
 the pipe struct.
 The initial challenge is stored in p->challenge.
 *******************************************************************/

static BOOL api_pipe_ntlmssp_verify(pipes_struct *p, RPC_AUTH_NTLMSSP_RESP *ntlmssp_resp)
{
	uchar lm_owf[24];
	uchar nt_owf[128];
	int nt_pw_len;
	int lm_pw_len;
	fstring user_name;
	fstring domain;
	fstring wks;

	NTSTATUS nt_status;

	auth_usersupplied_info *user_info = NULL;
	auth_authsupplied_info *auth_info = NULL;
	auth_serversupplied_info *server_info = NULL;

	uid_t uid;
	uid_t gid;

	DEBUG(5,("api_pipe_ntlmssp_verify: checking user details\n"));

	memset(p->user_name, '\0', sizeof(p->user_name));
	memset(p->pipe_user_name, '\0', sizeof(p->pipe_user_name));
	memset(p->domain, '\0', sizeof(p->domain));
	memset(p->wks, '\0', sizeof(p->wks));

	/* Set up for non-authenticated user. */
	delete_nt_token(&p->pipe_user.nt_user_token);
	p->pipe_user.ngroups = 0;
	SAFE_FREE( p->pipe_user.groups);

	/* 
	 * Setup an empty password for a guest user.
	 */

	/*
	 * We always negotiate UNICODE.
	 */

	if (p->ntlmssp_chal_flags & NTLMSSP_NEGOTIATE_UNICODE) {
		rpcstr_pull(user_name, ntlmssp_resp->user, sizeof(fstring), ntlmssp_resp->hdr_usr.str_str_len*2, 0 );
		rpcstr_pull(domain, ntlmssp_resp->domain, sizeof(fstring), ntlmssp_resp->hdr_domain.str_str_len*2, 0);
		rpcstr_pull(wks, ntlmssp_resp->wks, sizeof(fstring), ntlmssp_resp->hdr_wks.str_str_len*2, 0);
	} else {
		pull_ascii_fstring(user_name, ntlmssp_resp->user);
		pull_ascii_fstring(domain, ntlmssp_resp->domain);
		pull_ascii_fstring(wks, ntlmssp_resp->wks);
	}

	DEBUG(5,("user: %s domain: %s wks: %s\n", user_name, domain, wks));

	nt_pw_len = MIN(sizeof(nt_owf), ntlmssp_resp->hdr_nt_resp.str_str_len);
	lm_pw_len = MIN(sizeof(lm_owf), ntlmssp_resp->hdr_lm_resp.str_str_len);

	memcpy(lm_owf, ntlmssp_resp->lm_resp, sizeof(lm_owf));
	memcpy(nt_owf, ntlmssp_resp->nt_resp, nt_pw_len);

#ifdef DEBUG_PASSWORD
	DEBUG(100,("lm, nt owfs, chal\n"));
	dump_data(100, (char *)lm_owf, sizeof(lm_owf));
	dump_data(100, (char *)nt_owf, nt_pw_len);
	dump_data(100, (char *)p->challenge, 8);
#endif

	/*
	 * Allow guest access. Patch from Shirish Kalele <kalele@veritas.com>.
	 */

	if (*user_name) {

	 	/* 
		 * Do the length checking only if user is not NULL.
		 */

 		if (ntlmssp_resp->hdr_lm_resp.str_str_len == 0)
 			return False;
 		if (ntlmssp_resp->hdr_nt_resp.str_str_len == 0)
 			return False;
 		if (ntlmssp_resp->hdr_usr.str_str_len == 0)
 			return False;
 		if (ntlmssp_resp->hdr_domain.str_str_len == 0)
 			return False;
 		if (ntlmssp_resp->hdr_wks.str_str_len == 0)
 			return False;

	}
	
	make_auth_info_fixed(&auth_info, (uchar*)p->challenge);

	if (!make_user_info_netlogon_network(&user_info, 
					     user_name, domain, wks,
					     lm_owf, lm_pw_len, 
					     nt_owf, nt_pw_len)) {
		DEBUG(0,("make_user_info_netlogon_network failed!  Failing authenticaion.\n"));
		return False;
	}
	
	nt_status = check_password(user_info, auth_info, &server_info); 
	
	free_auth_info(&auth_info);
	free_user_info(&user_info);
	
	p->ntlmssp_auth_validated = NT_STATUS_IS_OK(nt_status);
	
	if (!p->ntlmssp_auth_validated) {
		DEBUG(1,("api_pipe_ntlmssp_verify: User [%s]\\[%s] from machine %s \
failed authentication on named pipe %s.\n", domain, user_name, wks, p->name ));
		free_server_info(&server_info);
		return False;
	}

	/*
	 * Set up the sign/seal data.
	 */

	{
		uchar p24[24];
		NTLMSSPOWFencrypt(server_info->first_8_lm_hash, lm_owf, p24);
		{
			unsigned char j = 0;
			int ind;

			unsigned char k2[8];

			memcpy(k2, p24, 5);
			k2[5] = 0xe5;
			k2[6] = 0x38;
			k2[7] = 0xb0;

			for (ind = 0; ind < 256; ind++)
				p->ntlmssp_hash[ind] = (unsigned char)ind;

			for( ind = 0; ind < 256; ind++) {
				unsigned char tc;

				j += (p->ntlmssp_hash[ind] + k2[ind%8]);

				tc = p->ntlmssp_hash[ind];
				p->ntlmssp_hash[ind] = p->ntlmssp_hash[j];
				p->ntlmssp_hash[j] = tc;
			}

			p->ntlmssp_hash[256] = 0;
			p->ntlmssp_hash[257] = 0;
		}
/*		NTLMSSPhash(p->ntlmssp_hash, p24); */
		p->ntlmssp_seq_num = 0;

	}

	fstrcpy(p->user_name, user_name);
	fstrcpy(p->pipe_user_name, pdb_get_username(server_info->sam_account));
	fstrcpy(p->domain, domain);
	fstrcpy(p->wks, wks);

	/*
	 * Store the UNIX credential data (uid/gid pair) in the pipe structure.
	 */

	if (!IS_SAM_UNIX_USER(server_info->sam_account)) {
		DEBUG(0,("Attempted authenticated pipe with invalid user.  No uid/gid in SAM_ACCOUNT\n"));
		free_server_info(&server_info);
		return False;
	}
	
	uid = pdb_get_uid(server_info->sam_account);
	gid = pdb_get_gid(server_info->sam_account);

	p->pipe_user.uid = uid;
	p->pipe_user.gid = gid;

	/* Set up pipe user group membership. */
	initialise_groups(p->pipe_user_name, p->pipe_user.uid, p->pipe_user.gid);
	get_current_groups( &p->pipe_user.ngroups, &p->pipe_user.groups);

	if (server_info->ptok)
		add_supplementary_nt_login_groups(&p->pipe_user.ngroups, &p->pipe_user.groups, &server_info->ptok);

	/* Create an NT_USER_TOKEN struct for this user. */
	p->pipe_user.nt_user_token = create_nt_token(p->pipe_user.uid,p->pipe_user.gid,
						     p->pipe_user.ngroups, p->pipe_user.groups,
						     server_info->guest, server_info->ptok);

	p->ntlmssp_auth_validated = True;

	pdb_free_sam(&server_info->sam_account);
	return True;
}

/*******************************************************************
 The switch table for the pipe names and the functions to handle them.
 *******************************************************************/

struct api_cmd
{
  char * pipe_clnt_name;
  char * pipe_srv_name;
  BOOL (*fn) (pipes_struct *);
};

static struct api_cmd api_fd_commands[] =
{
    { "lsarpc",   "lsass",   api_ntlsa_rpc },
    { "samr",     "lsass",   api_samr_rpc },
    { "srvsvc",   "ntsvcs",  api_srvsvc_rpc },
    { "wkssvc",   "ntsvcs",  api_wkssvc_rpc },
    { "NETLOGON", "lsass",   api_netlog_rpc },
    { "winreg",   "winreg",  api_reg_rpc },
    { "spoolss",  "spoolss", api_spoolss_rpc },
    { "netdfs",   "netdfs" , api_netdfs_rpc },
    { NULL,       NULL,      NULL }
};

/*******************************************************************
 This is the client reply to our challenge for an authenticated 
 bind request. The challenge we sent is in p->challenge.
*******************************************************************/

BOOL api_pipe_bind_auth_resp(pipes_struct *p, prs_struct *rpc_in_p)
{
	RPC_HDR_AUTHA autha_info;
	RPC_AUTH_VERIFIER auth_verifier;
	RPC_AUTH_NTLMSSP_RESP ntlmssp_resp;

	DEBUG(5,("api_pipe_bind_auth_resp: decode request. %d\n", __LINE__));

	if (p->hdr.auth_len == 0) {
		DEBUG(0,("api_pipe_bind_auth_resp: No auth field sent !\n"));
		return False;
	}

	/*
	 * Decode the authentication verifier response.
	 */

	if(!smb_io_rpc_hdr_autha("", &autha_info, rpc_in_p, 0)) {
		DEBUG(0,("api_pipe_bind_auth_resp: unmarshall of RPC_HDR_AUTHA failed.\n"));
		return False;
	}

	if (autha_info.auth_type != NTLMSSP_AUTH_TYPE || autha_info.auth_level != NTLMSSP_AUTH_LEVEL) {
		DEBUG(0,("api_pipe_bind_auth_resp: incorrect auth type (%d) or level (%d).\n",
			(int)autha_info.auth_type, (int)autha_info.auth_level ));
		return False;
	}

	if(!smb_io_rpc_auth_verifier("", &auth_verifier, rpc_in_p, 0)) {
		DEBUG(0,("api_pipe_bind_auth_resp: unmarshall of RPC_AUTH_VERIFIER failed.\n"));
		return False;
	}

	/*
	 * Ensure this is a NTLMSSP_AUTH packet type.
	 */

	if (!rpc_auth_verifier_chk(&auth_verifier, "NTLMSSP", NTLMSSP_AUTH)) {
		DEBUG(0,("api_pipe_bind_auth_resp: rpc_auth_verifier_chk failed.\n"));
		return False;
	}

	if(!smb_io_rpc_auth_ntlmssp_resp("", &ntlmssp_resp, rpc_in_p, 0)) {
		DEBUG(0,("api_pipe_bind_auth_resp: Failed to unmarshall RPC_AUTH_NTLMSSP_RESP.\n"));
		return False;
	}

	/*
	 * The following call actually checks the challenge/response data.
	 * for correctness against the given DOMAIN\user name.
	 */
	
	if (!api_pipe_ntlmssp_verify(p, &ntlmssp_resp))
		return False;

	p->pipe_bound = True
;
	return True;
}

/*******************************************************************
 Marshall a bind_nak pdu.
*******************************************************************/

static BOOL setup_bind_nak(pipes_struct *p)
{
	prs_struct outgoing_rpc;
	RPC_HDR nak_hdr;
	uint16 zero = 0;

	/* Free any memory in the current return data buffer. */
	prs_mem_free(&p->out_data.rdata);

	/*
	 * Marshall directly into the outgoing PDU space. We
	 * must do this as we need to set to the bind response
	 * header and are never sending more than one PDU here.
	 */

	prs_init( &outgoing_rpc, 0, p->mem_ctx, MARSHALL);
	prs_give_memory( &outgoing_rpc, (char *)p->out_data.current_pdu, sizeof(p->out_data.current_pdu), False);


	/*
	 * Initialize a bind_nak header.
	 */

	init_rpc_hdr(&nak_hdr, RPC_BINDNACK, RPC_FLG_FIRST | RPC_FLG_LAST,
            p->hdr.call_id, RPC_HEADER_LEN + sizeof(uint16), 0);

	/*
	 * Marshall the header into the outgoing PDU.
	 */

	if(!smb_io_rpc_hdr("", &nak_hdr, &outgoing_rpc, 0)) {
		DEBUG(0,("setup_bind_nak: marshalling of RPC_HDR failed.\n"));
		prs_mem_free(&outgoing_rpc);
		return False;
	}

	/*
	 * Now add the reject reason.
	 */

	if(!prs_uint16("reject code", &outgoing_rpc, 0, &zero)) {
		prs_mem_free(&outgoing_rpc);
        return False;
	}

	p->out_data.data_sent_length = 0;
	p->out_data.current_pdu_len = prs_offset(&outgoing_rpc);
	p->out_data.current_pdu_sent = 0;

	p->pipe_bound = False;

	return True;
}

/*******************************************************************
 Marshall a fault pdu.
*******************************************************************/

BOOL setup_fault_pdu(pipes_struct *p, NTSTATUS status)
{
	prs_struct outgoing_pdu;
	RPC_HDR fault_hdr;
	RPC_HDR_RESP hdr_resp;
	RPC_HDR_FAULT fault_resp;

	/* Free any memory in the current return data buffer. */
	prs_mem_free(&p->out_data.rdata);

	/*
	 * Marshall directly into the outgoing PDU space. We
	 * must do this as we need to set to the bind response
	 * header and are never sending more than one PDU here.
	 */

	prs_init( &outgoing_pdu, 0, p->mem_ctx, MARSHALL);
	prs_give_memory( &outgoing_pdu, (char *)p->out_data.current_pdu, sizeof(p->out_data.current_pdu), False);

	/*
	 * Initialize a fault header.
	 */

	init_rpc_hdr(&fault_hdr, RPC_FAULT, RPC_FLG_FIRST | RPC_FLG_LAST | RPC_FLG_NOCALL,
            p->hdr.call_id, RPC_HEADER_LEN + RPC_HDR_RESP_LEN + RPC_HDR_FAULT_LEN, 0);

	/*
	 * Initialize the HDR_RESP and FAULT parts of the PDU.
	 */

	memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));

	fault_resp.status = status;
	fault_resp.reserved = 0;

	/*
	 * Marshall the header into the outgoing PDU.
	 */

	if(!smb_io_rpc_hdr("", &fault_hdr, &outgoing_pdu, 0)) {
		DEBUG(0,("setup_fault_pdu: marshalling of RPC_HDR failed.\n"));
		prs_mem_free(&outgoing_pdu);
		return False;
	}

	if(!smb_io_rpc_hdr_resp("resp", &hdr_resp, &outgoing_pdu, 0)) {
		DEBUG(0,("setup_fault_pdu: failed to marshall RPC_HDR_RESP.\n"));
		prs_mem_free(&outgoing_pdu);
		return False;
	}

	if(!smb_io_rpc_hdr_fault("fault", &fault_resp, &outgoing_pdu, 0)) {
		DEBUG(0,("setup_fault_pdu: failed to marshall RPC_HDR_FAULT.\n"));
		prs_mem_free(&outgoing_pdu);
		return False;
	}

	p->out_data.data_sent_length = 0;
	p->out_data.current_pdu_len = prs_offset(&outgoing_pdu);
	p->out_data.current_pdu_sent = 0;

	prs_mem_free(&outgoing_pdu);
	return True;
}

/*******************************************************************
 Ensure a bind request has the correct abstract & transfer interface.
 Used to reject unknown binds from Win2k.
*******************************************************************/

BOOL check_bind_req(char* pipe_name, RPC_IFACE* abstract,
					RPC_IFACE* transfer)
{
	extern struct pipe_id_info pipe_names[];
	int i=0;
	fstring pname;
	fstrcpy(pname,"\\PIPE\\");
	fstrcat(pname,pipe_name);

	for(i=0;pipe_names[i].client_pipe; i++) {
		if(strequal(pipe_names[i].client_pipe, pname))
			break;
	}

	if(pipe_names[i].client_pipe == NULL)
		return False;

	/* check the abstract interface */
	if((abstract->version != pipe_names[i].abstr_syntax.version) ||
		(memcmp(&abstract->uuid, &pipe_names[i].abstr_syntax.uuid,
			sizeof(RPC_UUID)) != 0))
		return False;

	/* check the transfer interface */
	if((transfer->version != pipe_names[i].trans_syntax.version) ||
		(memcmp(&transfer->uuid, &pipe_names[i].trans_syntax.uuid,
			sizeof(RPC_UUID)) != 0))
		return False;

	return True;
}

/*******************************************************************
 Respond to a pipe bind request.
*******************************************************************/

BOOL api_pipe_bind_req(pipes_struct *p, prs_struct *rpc_in_p)
{
	RPC_HDR_BA hdr_ba;
	RPC_HDR_RB hdr_rb;
	RPC_HDR_AUTH auth_info;
	uint16 assoc_gid;
	fstring ack_pipe_name;
	prs_struct out_hdr_ba;
	prs_struct out_auth;
	prs_struct outgoing_rpc;
	int i = 0;
	int auth_len = 0;
	enum RPC_PKT_TYPE reply_pkt_type;

	p->ntlmssp_auth_requested = False;

	DEBUG(5,("api_pipe_bind_req: decode request. %d\n", __LINE__));

	/*
	 * Try and find the correct pipe name to ensure
	 * that this is a pipe name we support.
	 */

	for (i = 0; api_fd_commands[i].pipe_clnt_name; i++) {
		if (strequal(api_fd_commands[i].pipe_clnt_name, p->name) &&
		    api_fd_commands[i].fn != NULL) {
			DEBUG(3,("api_pipe_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
			           api_fd_commands[i].pipe_clnt_name,
			           api_fd_commands[i].pipe_srv_name));
			fstrcpy(p->pipe_srv_name, api_fd_commands[i].pipe_srv_name);
			break;
		}
	}

	if (api_fd_commands[i].fn == NULL) {
		DEBUG(3,("api_pipe_bind_req: Unknown pipe name %s in bind request.\n",
			p->name ));
		if(!setup_bind_nak(p))
			return False;
		return True;
	}

	/* decode the bind request */
	if(!smb_io_rpc_hdr_rb("", &hdr_rb, rpc_in_p, 0))  {
		DEBUG(0,("api_pipe_bind_req: unable to unmarshall RPC_HDR_RB struct.\n"));
		return False;
	}

	/*
	 * Check if this is an authenticated request.
	 */

	if (p->hdr.auth_len != 0) {
		RPC_AUTH_VERIFIER auth_verifier;
		RPC_AUTH_NTLMSSP_NEG ntlmssp_neg;

		/* 
		 * Decode the authentication verifier.
		 */

		if(!smb_io_rpc_hdr_auth("", &auth_info, rpc_in_p, 0)) {
			DEBUG(0,("api_pipe_bind_req: unable to unmarshall RPC_HDR_AUTH struct.\n"));
			return False;
		}

		/*
		 * We only support NTLMSSP_AUTH_TYPE requests.
		 */

		if(auth_info.auth_type != NTLMSSP_AUTH_TYPE) {
			DEBUG(0,("api_pipe_bind_req: unknown auth type %x requested.\n",
				auth_info.auth_type ));
			return False;
		}

		if(!smb_io_rpc_auth_verifier("", &auth_verifier, rpc_in_p, 0)) {
			DEBUG(0,("api_pipe_bind_req: unable to unmarshall RPC_HDR_AUTH struct.\n"));
			return False;
		}

		if(!strequal(auth_verifier.signature, "NTLMSSP")) {
			DEBUG(0,("api_pipe_bind_req: auth_verifier.signature != NTLMSSP\n"));
			return False;
		}

		if(auth_verifier.msg_type != NTLMSSP_NEGOTIATE) {
			DEBUG(0,("api_pipe_bind_req: auth_verifier.msg_type (%d) != NTLMSSP_NEGOTIATE\n",
				auth_verifier.msg_type));
			return False;
		}

		if(!smb_io_rpc_auth_ntlmssp_neg("", &ntlmssp_neg, rpc_in_p, 0)) {
			DEBUG(0,("api_pipe_bind_req: Failed to unmarshall RPC_AUTH_NTLMSSP_NEG.\n"));
			return False;
		}

		p->ntlmssp_chal_flags = SMBD_NTLMSSP_NEG_FLAGS;
		p->ntlmssp_auth_requested = True;
	}

	switch(p->hdr.pkt_type) {
		case RPC_BIND:
			/* name has to be \PIPE\xxxxx */
			fstrcpy(ack_pipe_name, "\\PIPE\\");
			fstrcat(ack_pipe_name, p->pipe_srv_name);
			reply_pkt_type = RPC_BINDACK;
			break;
		case RPC_ALTCONT:
			/* secondary address CAN be NULL
			 * as the specs say it's ignored.
			 * It MUST NULL to have the spoolss working.
			 */
			fstrcpy(ack_pipe_name,"");
			reply_pkt_type = RPC_ALTCONTRESP;
			break;
		default:
			return False;
	}

	DEBUG(5,("api_pipe_bind_req: make response. %d\n", __LINE__));

	/* 
	 * Marshall directly into the outgoing PDU space. We
	 * must do this as we need to set to the bind response
	 * header and are never sending more than one PDU here.
	 */

	prs_init( &outgoing_rpc, 0, p->mem_ctx, MARSHALL);
	prs_give_memory( &outgoing_rpc, (char *)p->out_data.current_pdu, sizeof(p->out_data.current_pdu), False);

	/*
	 * Setup the memory to marshall the ba header, and the
	 * auth footers.
	 */

	if(!prs_init(&out_hdr_ba, 1024, p->mem_ctx, MARSHALL)) {
		DEBUG(0,("api_pipe_bind_req: malloc out_hdr_ba failed.\n"));
		prs_mem_free(&outgoing_rpc);
		return False;
	}

	if(!prs_init(&out_auth, 1024, p->mem_ctx, MARSHALL)) {
		DEBUG(0,("pi_pipe_bind_req: malloc out_auth failed.\n"));
		prs_mem_free(&outgoing_rpc);
		prs_mem_free(&out_hdr_ba);
		return False;
	}

	if (p->ntlmssp_auth_requested)
		assoc_gid = 0x7a77;
	else
		assoc_gid = hdr_rb.bba.assoc_gid ? hdr_rb.bba.assoc_gid : 0x53f0;

	/*
	 * Create the bind response struct.
	 */

	/* If the requested abstract synt uuid doesn't match our client pipe,
		reject the bind_ack & set the transfer interface synt to all 0's,
		ver 0 (observed when NT5 attempts to bind to abstract interfaces
		unknown to NT4)
		Needed when adding entries to a DACL from NT5 - SK */

	if(check_bind_req(p->name, &hdr_rb.abstract, &hdr_rb.transfer)) {
		init_rpc_hdr_ba(&hdr_ba,
	                MAX_PDU_FRAG_LEN,
	                MAX_PDU_FRAG_LEN,
	                assoc_gid,
	                ack_pipe_name,
	                0x1, 0x0, 0x0,
	                &hdr_rb.transfer);
	} else {
		RPC_IFACE null_interface;
		ZERO_STRUCT(null_interface);
		/* Rejection reason: abstract syntax not supported */
		init_rpc_hdr_ba(&hdr_ba, MAX_PDU_FRAG_LEN,
					MAX_PDU_FRAG_LEN, assoc_gid,
					ack_pipe_name, 0x1, 0x2, 0x1,
					&null_interface);
	}

	/*
	 * and marshall it.
	 */

	if(!smb_io_rpc_hdr_ba("", &hdr_ba, &out_hdr_ba, 0)) {
		DEBUG(0,("api_pipe_bind_req: marshalling of RPC_HDR_BA failed.\n"));
		goto err_exit;
	}

	/*
	 * Now the authentication.
	 */

	if (p->ntlmssp_auth_requested) {
		RPC_AUTH_VERIFIER auth_verifier;
		RPC_AUTH_NTLMSSP_CHAL ntlmssp_chal;

		generate_random_buffer(p->challenge, 8, False);

		/*** Authentication info ***/

		init_rpc_hdr_auth(&auth_info, NTLMSSP_AUTH_TYPE, NTLMSSP_AUTH_LEVEL, RPC_HDR_AUTH_LEN, 1);
		if(!smb_io_rpc_hdr_auth("", &auth_info, &out_auth, 0)) {
			DEBUG(0,("api_pipe_bind_req: marshalling of RPC_HDR_AUTH failed.\n"));
			goto err_exit;
		}

		/*** NTLMSSP verifier ***/

		init_rpc_auth_verifier(&auth_verifier, "NTLMSSP", NTLMSSP_CHALLENGE);
		if(!smb_io_rpc_auth_verifier("", &auth_verifier, &out_auth, 0)) {
			DEBUG(0,("api_pipe_bind_req: marshalling of RPC_AUTH_VERIFIER failed.\n"));
			goto err_exit;
		}

		/* NTLMSSP challenge ***/

		init_rpc_auth_ntlmssp_chal(&ntlmssp_chal, p->ntlmssp_chal_flags, p->challenge);
		if(!smb_io_rpc_auth_ntlmssp_chal("", &ntlmssp_chal, &out_auth, 0)) {
			DEBUG(0,("api_pipe_bind_req: marshalling of RPC_AUTH_NTLMSSP_CHAL failed.\n"));
			goto err_exit;
		}

		/* Auth len in the rpc header doesn't include auth_header. */
		auth_len = prs_offset(&out_auth) - RPC_HDR_AUTH_LEN;
	}

	/*
	 * Create the header, now we know the length.
	 */

	init_rpc_hdr(&p->hdr, reply_pkt_type, RPC_FLG_FIRST | RPC_FLG_LAST,
			p->hdr.call_id,
			RPC_HEADER_LEN + prs_offset(&out_hdr_ba) + prs_offset(&out_auth),
			auth_len);

	/*
	 * Marshall the header into the outgoing PDU.
	 */

	if(!smb_io_rpc_hdr("", &p->hdr, &outgoing_rpc, 0)) {
		DEBUG(0,("pi_pipe_bind_req: marshalling of RPC_HDR failed.\n"));
		goto err_exit;
	}

	/*
	 * Now add the RPC_HDR_BA and any auth needed.
	 */

	if(!prs_append_prs_data( &outgoing_rpc, &out_hdr_ba)) {
		DEBUG(0,("api_pipe_bind_req: append of RPC_HDR_BA failed.\n"));
		goto err_exit;
	}

	if(p->ntlmssp_auth_requested && !prs_append_prs_data( &outgoing_rpc, &out_auth)) {
		DEBUG(0,("api_pipe_bind_req: append of auth info failed.\n"));
		goto err_exit;
	}

	if(!p->ntlmssp_auth_requested)
		p->pipe_bound = True;

	/*
	 * Setup the lengths for the initial reply.
	 */

	p->out_data.data_sent_length = 0;
	p->out_data.current_pdu_len = prs_offset(&outgoing_rpc);
	p->out_data.current_pdu_sent = 0;

	prs_mem_free(&out_hdr_ba);
	prs_mem_free(&out_auth);

	return True;

  err_exit:

	prs_mem_free(&outgoing_rpc);
	prs_mem_free(&out_hdr_ba);
	prs_mem_free(&out_auth);
	return False;
}

/****************************************************************************
 Deal with sign & seal processing on an RPC request.
****************************************************************************/

BOOL api_pipe_auth_process(pipes_struct *p, prs_struct *rpc_in)
{
	/*
	 * We always negotiate the following two bits....
	 */
	BOOL auth_verify = ((p->ntlmssp_chal_flags & NTLMSSP_NEGOTIATE_SIGN) != 0);
	BOOL auth_seal   = ((p->ntlmssp_chal_flags & NTLMSSP_NEGOTIATE_SEAL) != 0);
	int data_len;
	int auth_len;
	uint32 old_offset;
	uint32 crc32 = 0;

	auth_len = p->hdr.auth_len;

	if ((auth_len != RPC_AUTH_NTLMSSP_CHK_LEN) && auth_verify) {
		DEBUG(0,("api_pipe_auth_process: Incorrect auth_len %d.\n", auth_len ));
		return False;
	}

	/*
	 * The following is that length of the data we must verify or unseal.
	 * This doesn't include the RPC headers or the auth_len or the RPC_HDR_AUTH_LEN
	 * preceeding the auth_data.
	 */

	data_len = p->hdr.frag_len - RPC_HEADER_LEN - RPC_HDR_REQ_LEN - 
			(auth_verify ? RPC_HDR_AUTH_LEN : 0) - auth_len;
	
	DEBUG(5,("api_pipe_auth_process: sign: %s seal: %s data %d auth %d\n",
	         BOOLSTR(auth_verify), BOOLSTR(auth_seal), data_len, auth_len));

	if (auth_seal) {
		/*
		 * The data in rpc_in doesn't contain the RPC_HEADER as this
		 * has already been consumed.
		 */
		char *data = prs_data_p(rpc_in) + RPC_HDR_REQ_LEN;
		NTLMSSPcalc_p(p, (uchar*)data, data_len);
		crc32 = crc32_calc_buffer(data, data_len);
	}

	old_offset = prs_offset(rpc_in);

	if (auth_seal || auth_verify) {
		RPC_HDR_AUTH auth_info;

		if(!prs_set_offset(rpc_in, old_offset + data_len)) {
			DEBUG(0,("api_pipe_auth_process: cannot move offset to %u.\n",
				(unsigned int)old_offset + data_len ));
			return False;
		}

		if(!smb_io_rpc_hdr_auth("hdr_auth", &auth_info, rpc_in, 0)) {
			DEBUG(0,("api_pipe_auth_process: failed to unmarshall RPC_HDR_AUTH.\n"));
			return False;
		}
	}

	if (auth_verify) {
		RPC_AUTH_NTLMSSP_CHK ntlmssp_chk;
		char *req_data = prs_data_p(rpc_in) + prs_offset(rpc_in) + 4;

		DEBUG(5,("api_pipe_auth_process: auth %d\n", prs_offset(rpc_in) + 4));

		/*
		 * Ensure we have RPC_AUTH_NTLMSSP_CHK_LEN - 4 more bytes in the
		 * incoming buffer.
		 */
		if(prs_mem_get(rpc_in, RPC_AUTH_NTLMSSP_CHK_LEN - 4) == NULL) {
			DEBUG(0,("api_pipe_auth_process: missing %d bytes in buffer.\n",
				RPC_AUTH_NTLMSSP_CHK_LEN - 4 ));
			return False;
		}

		NTLMSSPcalc_p(p, (uchar*)req_data, RPC_AUTH_NTLMSSP_CHK_LEN - 4);
		if(!smb_io_rpc_auth_ntlmssp_chk("auth_sign", &ntlmssp_chk, rpc_in, 0)) {
			DEBUG(0,("api_pipe_auth_process: failed to unmarshall RPC_AUTH_NTLMSSP_CHK.\n"));
			return False;
		}

		if (!rpc_auth_ntlmssp_chk(&ntlmssp_chk, crc32, p->ntlmssp_seq_num)) {
			DEBUG(0,("api_pipe_auth_process: NTLMSSP check failed.\n"));
			return False;
		}
	}

	/*
	 * Return the current pointer to the data offset.
	 */

	if(!prs_set_offset(rpc_in, old_offset)) {
		DEBUG(0,("api_pipe_auth_process: failed to set offset back to %u\n",
			(unsigned int)old_offset ));
		return False;
	}

	return True;
}

/****************************************************************************
 Return a user struct for a pipe user.
****************************************************************************/

struct current_user *get_current_user(struct current_user *user, pipes_struct *p)
{
	if (p->ntlmssp_auth_validated) {
		memcpy(user, &p->pipe_user, sizeof(struct current_user));
	} else {
		extern struct current_user current_user;
		memcpy(user, &current_user, sizeof(struct current_user));
	}

	return user;
}

/****************************************************************************
 Find the correct RPC function to call for this request.
 If the pipe is authenticated then become the correct UNIX user
 before doing the call.
****************************************************************************/

BOOL api_pipe_request(pipes_struct *p)
{
	int i = 0;
	BOOL ret = False;

	if (p->ntlmssp_auth_validated) {

		if(!become_authenticated_pipe_user(p)) {
			prs_mem_free(&p->out_data.rdata);
			return False;
		}
	}

	for (i = 0; api_fd_commands[i].pipe_clnt_name; i++) {
		if (strequal(api_fd_commands[i].pipe_clnt_name, p->name) &&
		    api_fd_commands[i].fn != NULL) {
			DEBUG(3,("Doing \\PIPE\\%s\n", api_fd_commands[i].pipe_clnt_name));
			set_current_rpc_talloc(p->mem_ctx);
			ret = api_fd_commands[i].fn(p);
			set_current_rpc_talloc(NULL);
		}
	}

	if(p->ntlmssp_auth_validated)
		unbecome_authenticated_pipe_user();

	return ret;
}

/*******************************************************************
 Calls the underlying RPC function for a named pipe.
 ********************************************************************/

BOOL api_rpcTNP(pipes_struct *p, char *rpc_name, 
		struct api_struct *api_rpc_cmds)
{
	int fn_num;
	fstring name;
	uint32 offset1, offset2;
 
	/* interpret the command */
	DEBUG(4,("api_rpcTNP: %s op 0x%x - ", rpc_name, p->hdr_req.opnum));

	slprintf(name, sizeof(name)-1, "in_%s", rpc_name);
	prs_dump(name, p->hdr_req.opnum, &p->in_data.data);

	for (fn_num = 0; api_rpc_cmds[fn_num].name; fn_num++) {
		if (api_rpc_cmds[fn_num].opnum == p->hdr_req.opnum && api_rpc_cmds[fn_num].fn != NULL) {
			DEBUG(3,("api_rpcTNP: rpc command: %s\n", api_rpc_cmds[fn_num].name));
			break;
		}
	}

	if (api_rpc_cmds[fn_num].name == NULL) {
		/*
		 * For an unknown RPC just return a fault PDU but
		 * return True to allow RPC's on the pipe to continue
		 * and not put the pipe into fault state. JRA.
		 */
		DEBUG(4, ("unknown\n"));
		setup_fault_pdu(p, NT_STATUS(0x1c010002));
		return True;
	}

	offset1 = prs_offset(&p->out_data.rdata);

	/* do the actual command */
	if(!api_rpc_cmds[fn_num].fn(p)) {
		DEBUG(0,("api_rpcTNP: %s: %s failed.\n", rpc_name, api_rpc_cmds[fn_num].name));
		prs_mem_free(&p->out_data.rdata);
		return False;
	}

	slprintf(name, sizeof(name)-1, "out_%s", rpc_name);
	offset2 = prs_offset(&p->out_data.rdata);
	prs_set_offset(&p->out_data.rdata, offset1);
	prs_dump(name, p->hdr_req.opnum, &p->out_data.rdata);
	prs_set_offset(&p->out_data.rdata, offset2);

	DEBUG(5,("api_rpcTNP: called %s successfully\n", rpc_name));

	/* Check for buffer underflow in rpc parsing */

	if ((DEBUGLEVEL >= 10) && 
	    (p->in_data.data.data_offset != p->in_data.data.buffer_size)) {
		int data_len = p->in_data.data.buffer_size - 
			p->in_data.data.data_offset;
		char *data;

		data = malloc(data_len);

		DEBUG(10, ("api_rpcTNP: rpc input buffer underflow (parse error?)\n"));
		if (data) {
			prs_uint8s(False, "", &p->in_data.data, 0, (unsigned char *)data,
				   data_len);
			SAFE_FREE(data);
		}

	}

	return True;
}