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
|
/*
* Unix SMB/CIFS implementation.
* RPC Pipe client / server routines
* Copyright (C) Andrew Tridgell 1992-1998,
* Largely re-written : 2005
* Copyright (C) Jeremy Allison 1998 - 2005
* Copyright (C) Simo Sorce 2010
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "rpc_server/srv_pipe_internal.h"
#include "rpc_dce.h"
#include "../libcli/named_pipe_auth/npa_tstream.h"
#include "rpc_server/rpc_ncacn_np.h"
#include "librpc/gen_ndr/netlogon.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_SRV
static int pipes_open;
static struct pipes_struct *InternalPipes;
/* TODO
* the following prototypes are declared here to avoid
* code being moved about too much for a patch to be
* disrupted / less obvious.
*
* these functions, and associated functions that they
* call, should be moved behind a .so module-loading
* system _anyway_. so that's the next step...
*/
/****************************************************************************
Internal Pipe iterator functions.
****************************************************************************/
struct pipes_struct *get_first_internal_pipe(void)
{
return InternalPipes;
}
struct pipes_struct *get_next_internal_pipe(struct pipes_struct *p)
{
return p->next;
}
static void free_pipe_rpc_context_internal( PIPE_RPC_FNS *list )
{
PIPE_RPC_FNS *tmp = list;
PIPE_RPC_FNS *tmp2;
while (tmp) {
tmp2 = tmp->next;
SAFE_FREE(tmp);
tmp = tmp2;
}
return;
}
bool check_open_pipes(void)
{
struct pipes_struct *p;
for (p = InternalPipes; p != NULL; p = p->next) {
if (num_pipe_handles(p) != 0) {
return true;
}
}
return false;
}
/****************************************************************************
Close an rpc pipe.
****************************************************************************/
int close_internal_rpc_pipe_hnd(struct pipes_struct *p)
{
if (!p) {
DEBUG(0,("Invalid pipe in close_internal_rpc_pipe_hnd\n"));
return False;
}
TALLOC_FREE(p->auth.auth_ctx);
free_pipe_rpc_context_internal( p->contexts );
/* Free the handles database. */
close_policy_by_pipe(p);
DLIST_REMOVE(InternalPipes, p);
ZERO_STRUCTP(p);
return 0;
}
/****************************************************************************
Make an internal namedpipes structure
****************************************************************************/
struct pipes_struct *make_internal_rpc_pipe_p(TALLOC_CTX *mem_ctx,
const struct ndr_syntax_id *syntax,
struct client_address *client_id,
const struct auth_serversupplied_info *server_info,
struct messaging_context *msg_ctx)
{
struct pipes_struct *p;
DEBUG(4,("Create pipe requested %s\n",
get_pipe_name_from_syntax(talloc_tos(), syntax)));
p = TALLOC_ZERO_P(mem_ctx, struct pipes_struct);
if (!p) {
DEBUG(0,("ERROR! no memory for pipes_struct!\n"));
return NULL;
}
p->mem_ctx = talloc_named(p, 0, "pipe %s %p",
get_pipe_name_from_syntax(talloc_tos(),
syntax), p);
if (p->mem_ctx == NULL) {
DEBUG(0,("open_rpc_pipe_p: talloc_init failed.\n"));
TALLOC_FREE(p);
return NULL;
}
if (!init_pipe_handles(p, syntax)) {
DEBUG(0,("open_rpc_pipe_p: init_pipe_handles failed.\n"));
TALLOC_FREE(p);
return NULL;
}
p->server_info = copy_serverinfo(p, server_info);
if (p->server_info == NULL) {
DEBUG(0, ("open_rpc_pipe_p: copy_serverinfo failed\n"));
close_policy_by_pipe(p);
TALLOC_FREE(p);
return NULL;
}
p->msg_ctx = msg_ctx;
DLIST_ADD(InternalPipes, p);
p->client_id = client_id;
p->endian = RPC_LITTLE_ENDIAN;
p->syntax = *syntax;
DEBUG(4,("Created internal pipe %s (pipes_open=%d)\n",
get_pipe_name_from_syntax(talloc_tos(), syntax), pipes_open));
talloc_set_destructor(p, close_internal_rpc_pipe_hnd);
return p;
}
static NTSTATUS rpcint_dispatch(struct pipes_struct *p,
TALLOC_CTX *mem_ctx,
uint32_t opnum,
const DATA_BLOB *in_data,
DATA_BLOB *out_data)
{
uint32_t num_cmds = rpc_srv_get_pipe_num_cmds(&p->syntax);
const struct api_struct *cmds = rpc_srv_get_pipe_cmds(&p->syntax);
uint32_t i;
bool ok;
/* set opnum */
p->opnum = opnum;
for (i = 0; i < num_cmds; i++) {
if (cmds[i].opnum == opnum && cmds[i].fn != NULL) {
break;
}
}
if (i == num_cmds) {
return NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE;
}
p->in_data.data = *in_data;
p->out_data.rdata = data_blob_null;
ok = cmds[i].fn(p);
p->in_data.data = data_blob_null;
if (!ok) {
data_blob_free(&p->out_data.rdata);
talloc_free_children(p->mem_ctx);
return NT_STATUS_RPC_CALL_FAILED;
}
if (p->fault_state) {
p->fault_state = false;
data_blob_free(&p->out_data.rdata);
talloc_free_children(p->mem_ctx);
return NT_STATUS_RPC_CALL_FAILED;
}
if (p->bad_handle_fault_state) {
p->bad_handle_fault_state = false;
data_blob_free(&p->out_data.rdata);
talloc_free_children(p->mem_ctx);
return NT_STATUS_RPC_SS_CONTEXT_MISMATCH;
}
if (p->rng_fault_state) {
p->rng_fault_state = false;
data_blob_free(&p->out_data.rdata);
talloc_free_children(p->mem_ctx);
return NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE;
}
*out_data = p->out_data.rdata;
talloc_steal(mem_ctx, out_data->data);
p->out_data.rdata = data_blob_null;
talloc_free_children(p->mem_ctx);
return NT_STATUS_OK;
}
struct rpcint_bh_state {
struct pipes_struct *p;
};
static bool rpcint_bh_is_connected(struct dcerpc_binding_handle *h)
{
struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
struct rpcint_bh_state);
if (!hs->p) {
return false;
}
return true;
}
static uint32_t rpcint_bh_set_timeout(struct dcerpc_binding_handle *h,
uint32_t timeout)
{
/* TODO: implement timeouts */
return UINT32_MAX;
}
struct rpcint_bh_raw_call_state {
DATA_BLOB in_data;
DATA_BLOB out_data;
uint32_t out_flags;
};
static struct tevent_req *rpcint_bh_raw_call_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct dcerpc_binding_handle *h,
const struct GUID *object,
uint32_t opnum,
uint32_t in_flags,
const uint8_t *in_data,
size_t in_length)
{
struct rpcint_bh_state *hs =
dcerpc_binding_handle_data(h,
struct rpcint_bh_state);
struct tevent_req *req;
struct rpcint_bh_raw_call_state *state;
bool ok;
NTSTATUS status;
req = tevent_req_create(mem_ctx, &state,
struct rpcint_bh_raw_call_state);
if (req == NULL) {
return NULL;
}
state->in_data.data = discard_const_p(uint8_t, in_data);
state->in_data.length = in_length;
ok = rpcint_bh_is_connected(h);
if (!ok) {
tevent_req_nterror(req, NT_STATUS_INVALID_CONNECTION);
return tevent_req_post(req, ev);
}
/* TODO: allow async */
status = rpcint_dispatch(hs->p, state, opnum,
&state->in_data,
&state->out_data);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
tevent_req_done(req);
return tevent_req_post(req, ev);
}
static NTSTATUS rpcint_bh_raw_call_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
uint8_t **out_data,
size_t *out_length,
uint32_t *out_flags)
{
struct rpcint_bh_raw_call_state *state =
tevent_req_data(req,
struct rpcint_bh_raw_call_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
*out_data = talloc_move(mem_ctx, &state->out_data.data);
*out_length = state->out_data.length;
*out_flags = 0;
tevent_req_received(req);
return NT_STATUS_OK;
}
struct rpcint_bh_disconnect_state {
uint8_t _dummy;
};
static struct tevent_req *rpcint_bh_disconnect_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct dcerpc_binding_handle *h)
{
struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
struct rpcint_bh_state);
struct tevent_req *req;
struct rpcint_bh_disconnect_state *state;
bool ok;
req = tevent_req_create(mem_ctx, &state,
struct rpcint_bh_disconnect_state);
if (req == NULL) {
return NULL;
}
ok = rpcint_bh_is_connected(h);
if (!ok) {
tevent_req_nterror(req, NT_STATUS_INVALID_CONNECTION);
return tevent_req_post(req, ev);
}
/*
* TODO: do a real async disconnect ...
*
* For now the caller needs to free pipes_struct
*/
hs->p = NULL;
tevent_req_done(req);
return tevent_req_post(req, ev);
}
static NTSTATUS rpcint_bh_disconnect_recv(struct tevent_req *req)
{
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
tevent_req_received(req);
return NT_STATUS_OK;
}
static bool rpcint_bh_ref_alloc(struct dcerpc_binding_handle *h)
{
return true;
}
static void rpcint_bh_do_ndr_print(struct dcerpc_binding_handle *h,
int ndr_flags,
const void *_struct_ptr,
const struct ndr_interface_call *call)
{
void *struct_ptr = discard_const(_struct_ptr);
if (DEBUGLEVEL < 11) {
return;
}
if (ndr_flags & NDR_IN) {
ndr_print_function_debug(call->ndr_print,
call->name,
ndr_flags,
struct_ptr);
}
if (ndr_flags & NDR_OUT) {
ndr_print_function_debug(call->ndr_print,
call->name,
ndr_flags,
struct_ptr);
}
}
static const struct dcerpc_binding_handle_ops rpcint_bh_ops = {
.name = "rpcint",
.is_connected = rpcint_bh_is_connected,
.set_timeout = rpcint_bh_set_timeout,
.raw_call_send = rpcint_bh_raw_call_send,
.raw_call_recv = rpcint_bh_raw_call_recv,
.disconnect_send = rpcint_bh_disconnect_send,
.disconnect_recv = rpcint_bh_disconnect_recv,
.ref_alloc = rpcint_bh_ref_alloc,
.do_ndr_print = rpcint_bh_do_ndr_print,
};
static NTSTATUS rpcint_binding_handle_ex(TALLOC_CTX *mem_ctx,
const struct ndr_syntax_id *abstract_syntax,
const struct ndr_interface_table *ndr_table,
struct client_address *client_id,
const struct auth_serversupplied_info *server_info,
struct messaging_context *msg_ctx,
struct dcerpc_binding_handle **binding_handle)
{
struct dcerpc_binding_handle *h;
struct rpcint_bh_state *hs;
if (ndr_table) {
abstract_syntax = &ndr_table->syntax_id;
}
h = dcerpc_binding_handle_create(mem_ctx,
&rpcint_bh_ops,
NULL,
ndr_table,
&hs,
struct rpcint_bh_state,
__location__);
if (h == NULL) {
return NT_STATUS_NO_MEMORY;
}
hs->p = make_internal_rpc_pipe_p(hs,
abstract_syntax,
client_id,
server_info,
msg_ctx);
if (hs->p == NULL) {
TALLOC_FREE(h);
return NT_STATUS_NO_MEMORY;
}
*binding_handle = h;
return NT_STATUS_OK;
}
/**
* @brief Create a new DCERPC Binding Handle which uses a local dispatch function.
*
* @param[in] mem_ctx The memory context to use.
*
* @param[in] ndr_table Normally the ndr_table_<name>.
*
* @param[in] client_id The info about the connected client.
*
* @param[in] serversupplied_info The server supplied authentication function.
*
* @param[in] msg_ctx The messaging context that can be used by the server
*
* @param[out] binding_handle A pointer to store the connected
* dcerpc_binding_handle
*
* @return NT_STATUS_OK on success, a corresponding NT status if an
* error occured.
*
* @code
* struct dcerpc_binding_handle *winreg_binding;
* NTSTATUS status;
*
* status = rpcint_binding_handle(tmp_ctx,
* &ndr_table_winreg,
* p->client_id,
* p->server_info,
* p->msg_ctx
* &winreg_binding);
* @endcode
*/
NTSTATUS rpcint_binding_handle(TALLOC_CTX *mem_ctx,
const struct ndr_interface_table *ndr_table,
struct client_address *client_id,
const struct auth_serversupplied_info *server_info,
struct messaging_context *msg_ctx,
struct dcerpc_binding_handle **binding_handle)
{
return rpcint_binding_handle_ex(mem_ctx, NULL, ndr_table, client_id,
server_info, msg_ctx, binding_handle);
}
/**
* @brief Create a new RPC client context which uses a local dispatch function.
*
* @param[in] mem_ctx The memory context to use.
*
* @param[in] abstract_syntax Normally the syntax_id of the autogenerated
* ndr_table_<name>.
*
* @param[in] dispatch The corresponding autogenerated dispatch function
* rpc_<name>_dispatch.
*
* @param[in] serversupplied_info The server supplied authentication function.
*
* @param[out] presult A pointer to store the connected rpc client pipe.
*
* @return NT_STATUS_OK on success, a corresponding NT status if an
* error occured.
*
* @code
* struct rpc_pipe_client *winreg_pipe;
* NTSTATUS status;
*
* status = rpc_pipe_open_internal(tmp_ctx,
* &ndr_table_winreg.syntax_id,
* rpc_winreg_dispatch,
* p->server_info,
* &winreg_pipe);
* @endcode
*/
NTSTATUS rpc_pipe_open_internal(TALLOC_CTX *mem_ctx,
const struct ndr_syntax_id *abstract_syntax,
const struct auth_serversupplied_info *serversupplied_info,
struct client_address *client_id,
struct messaging_context *msg_ctx,
struct rpc_pipe_client **presult)
{
struct rpc_pipe_client *result;
NTSTATUS status;
result = TALLOC_ZERO_P(mem_ctx, struct rpc_pipe_client);
if (result == NULL) {
return NT_STATUS_NO_MEMORY;
}
result->abstract_syntax = *abstract_syntax;
result->transfer_syntax = ndr_transfer_syntax;
if (client_id == NULL) {
static struct client_address unknown;
strlcpy(unknown.addr, "<UNKNOWN>", sizeof(unknown.addr));
unknown.name = "<UNKNOWN>";
client_id = &unknown;
}
result->max_xmit_frag = -1;
result->max_recv_frag = -1;
status = rpcint_binding_handle_ex(result,
abstract_syntax,
NULL,
client_id,
serversupplied_info,
msg_ctx,
&result->binding_handle);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(result);
return status;
}
*presult = result;
return NT_STATUS_OK;
}
/****************************************************************************
* External pipes functions
***************************************************************************/
struct np_proxy_state *make_external_rpc_pipe_p(TALLOC_CTX *mem_ctx,
const char *pipe_name,
const struct tsocket_address *local_address,
const struct tsocket_address *remote_address,
const struct auth_serversupplied_info *server_info)
{
struct np_proxy_state *result;
char *socket_np_dir;
const char *socket_dir;
struct tevent_context *ev;
struct tevent_req *subreq;
struct netr_SamInfo3 *info3;
NTSTATUS status;
bool ok;
int ret;
int sys_errno;
result = talloc(mem_ctx, struct np_proxy_state);
if (result == NULL) {
DEBUG(0, ("talloc failed\n"));
return NULL;
}
result->read_queue = tevent_queue_create(result, "np_read");
if (result->read_queue == NULL) {
DEBUG(0, ("tevent_queue_create failed\n"));
goto fail;
}
result->write_queue = tevent_queue_create(result, "np_write");
if (result->write_queue == NULL) {
DEBUG(0, ("tevent_queue_create failed\n"));
goto fail;
}
ev = s3_tevent_context_init(talloc_tos());
if (ev == NULL) {
DEBUG(0, ("s3_tevent_context_init failed\n"));
goto fail;
}
socket_dir = lp_parm_const_string(
GLOBAL_SECTION_SNUM, "external_rpc_pipe", "socket_dir",
lp_ncalrpc_dir());
if (socket_dir == NULL) {
DEBUG(0, ("externan_rpc_pipe:socket_dir not set\n"));
goto fail;
}
socket_np_dir = talloc_asprintf(talloc_tos(), "%s/np", socket_dir);
if (socket_np_dir == NULL) {
DEBUG(0, ("talloc_asprintf failed\n"));
goto fail;
}
info3 = talloc_zero(talloc_tos(), struct netr_SamInfo3);
if (info3 == NULL) {
DEBUG(0, ("talloc failed\n"));
goto fail;
}
status = serverinfo_to_SamInfo3(server_info, NULL, 0, info3);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(info3);
DEBUG(0, ("serverinfo_to_SamInfo3 failed: %s\n",
nt_errstr(status)));
goto fail;
}
become_root();
subreq = tstream_npa_connect_send(talloc_tos(), ev,
socket_np_dir,
pipe_name,
remote_address, /* client_addr */
NULL, /* client_name */
local_address, /* server_addr */
NULL, /* server_name */
info3,
server_info->user_session_key,
data_blob_null /* delegated_creds */);
if (subreq == NULL) {
unbecome_root();
DEBUG(0, ("tstream_npa_connect_send to %s for pipe %s and "
"user %s\\%s failed\n",
socket_np_dir, pipe_name, info3->base.domain.string,
info3->base.account_name.string));
goto fail;
}
ok = tevent_req_poll(subreq, ev);
unbecome_root();
if (!ok) {
DEBUG(0, ("tevent_req_poll to %s for pipe %s and user %s\\%s "
"failed for tstream_npa_connect: %s\n",
socket_np_dir, pipe_name, info3->base.domain.string,
info3->base.account_name.string,
strerror(errno)));
goto fail;
}
ret = tstream_npa_connect_recv(subreq, &sys_errno,
result,
&result->npipe,
&result->file_type,
&result->device_state,
&result->allocation_size);
TALLOC_FREE(subreq);
if (ret != 0) {
DEBUG(0, ("tstream_npa_connect_recv to %s for pipe %s and "
"user %s\\%s failed: %s\n",
socket_np_dir, pipe_name, info3->base.domain.string,
info3->base.account_name.string,
strerror(sys_errno)));
goto fail;
}
return result;
fail:
TALLOC_FREE(result);
return NULL;
}
static NTSTATUS rpc_pipe_open_external(TALLOC_CTX *mem_ctx,
const char *pipe_name,
const struct ndr_syntax_id *abstract_syntax,
const struct auth_serversupplied_info *server_info,
struct rpc_pipe_client **_result)
{
struct tsocket_address *local, *remote;
struct rpc_pipe_client *result = NULL;
struct np_proxy_state *proxy_state = NULL;
struct pipe_auth_data *auth;
NTSTATUS status;
int ret;
/* this is an internal connection, fake up ip addresses */
ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
NULL, 0, &local);
if (ret) {
return NT_STATUS_NO_MEMORY;
}
ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
NULL, 0, &remote);
if (ret) {
return NT_STATUS_NO_MEMORY;
}
proxy_state = make_external_rpc_pipe_p(mem_ctx, pipe_name,
local, remote, server_info);
if (!proxy_state) {
return NT_STATUS_UNSUCCESSFUL;
}
result = talloc_zero(mem_ctx, struct rpc_pipe_client);
if (result == NULL) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
result->abstract_syntax = *abstract_syntax;
result->transfer_syntax = ndr_transfer_syntax;
result->desthost = get_myname(result);
result->srv_name_slash = talloc_asprintf_strupper_m(
result, "\\\\%s", result->desthost);
if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
status = rpc_transport_tstream_init(result,
proxy_state->npipe,
proxy_state->read_queue,
proxy_state->write_queue,
&result->transport);
if (!NT_STATUS_IS_OK(status)) {
goto done;
}
result->auth = talloc_zero(result, struct pipe_auth_data);
if (!result->auth) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
result->auth->auth_type = DCERPC_AUTH_TYPE_NONE;
result->auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
status = rpccli_anon_bind_data(result, &auth);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to initialize anonymous bind.\n"));
goto done;
}
status = rpc_pipe_bind(result, auth);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to bind spoolss pipe.\n"));
goto done;
}
done:
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(result);
}
TALLOC_FREE(proxy_state);
*_result = result;
return status;
}
/**
* @brief Create a new RPC client context which uses a local dispatch function.
*
* @param mem_ctx The memory context on which thje pipe will ultimately
* be allocated
* @param name The pipe name to connect to.
* @param server_info Credentials to use for the connection.
* @param pipe [in|out] Checks if a pipe is connected, and connects it
* if not
*
* @return NT_STATUS_OK on success, a corresponding NT status if
* an error occured.
*/
NTSTATUS rpc_pipe_open_interface(TALLOC_CTX *mem_ctx,
const struct ndr_syntax_id *syntax,
const struct auth_serversupplied_info *server_info,
struct client_address *client_id,
struct messaging_context *msg_ctx,
struct rpc_pipe_client **cli_pipe)
{
struct rpc_pipe_client *cli = NULL;
const char *server_type;
const char *pipe_name;
NTSTATUS status;
TALLOC_CTX *tmp_ctx;
if (cli_pipe && rpccli_is_connected(*cli_pipe)) {
return NT_STATUS_OK;
} else {
TALLOC_FREE(*cli_pipe);
}
tmp_ctx = talloc_stackframe();
if (tmp_ctx == NULL) {
return NT_STATUS_NO_MEMORY;
}
pipe_name = get_pipe_name_from_syntax(tmp_ctx, syntax);
if (pipe_name == NULL) {
status = NT_STATUS_INVALID_PARAMETER;
goto done;
}
DEBUG(10, ("Connecting to %s pipe.\n", pipe_name));
server_type = lp_parm_const_string(GLOBAL_SECTION_SNUM,
"rpc_server", pipe_name,
"embedded");
if (StrCaseCmp(server_type, "embedded") == 0) {
status = rpc_pipe_open_internal(tmp_ctx,
syntax, server_info,
client_id, msg_ctx,
&cli);
if (!NT_STATUS_IS_OK(status)) {
goto done;
}
} else {
/* It would be nice to just use rpc_pipe_open_ncalrpc() but
* for now we need to use the special proxy setup to connect
* to spoolssd. */
status = rpc_pipe_open_external(tmp_ctx,
pipe_name, syntax,
server_info,
&cli);
if (!NT_STATUS_IS_OK(status)) {
goto done;
}
}
status = NT_STATUS_OK;
done:
if (NT_STATUS_IS_OK(status)) {
*cli_pipe = talloc_move(mem_ctx, &cli);
}
TALLOC_FREE(tmp_ctx);
return status;
}
|