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s3-vfs: Fix a null pointer deferference in vfs_media_harmony.
[Samba/id10ts.git] / source3 / rpc_server / rpc_ncacn_np.c
blob25ad8570a2864af64a601fcf021ada2993a655b0
1 /*
2 * Unix SMB/CIFS implementation.
3 * RPC Pipe client / server routines
4 * Copyright (C) Andrew Tridgell 1992-1998,
5 * Largely re-written : 2005
6 * Copyright (C) Jeremy Allison 1998 - 2005
7 * Copyright (C) Simo Sorce 2010
8 * Copyright (C) Andrew Bartlett 2011
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 3 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, see <http://www.gnu.org/licenses/>.
22 */
23
24 #include "includes.h"
25 #include "rpc_client/cli_pipe.h"
26 #include "rpc_server/srv_pipe_internal.h"
27 #include "rpc_dce.h"
28 #include "../libcli/named_pipe_auth/npa_tstream.h"
29 #include "rpc_server/rpc_ncacn_np.h"
30 #include "librpc/gen_ndr/netlogon.h"
31 #include "librpc/gen_ndr/auth.h"
32 #include "../auth/auth_sam_reply.h"
33 #include "auth.h"
34 #include "rpc_server/rpc_pipes.h"
35 #include "../lib/tsocket/tsocket.h"
36 #include "../lib/util/tevent_ntstatus.h"
37 #include "rpc_contexts.h"
38 #include "rpc_server/rpc_config.h"
39
40 #undef DBGC_CLASS
41 #define DBGC_CLASS DBGC_RPC_SRV
42
43 /****************************************************************************
44 Make an internal namedpipes structure
45 ****************************************************************************/
46
47 struct pipes_struct *make_internal_rpc_pipe_p(TALLOC_CTX *mem_ctx,
48 const struct ndr_syntax_id *syntax,
49 const struct tsocket_address *remote_address,
50 const struct auth_session_info *session_info,
51 struct messaging_context *msg_ctx)
52 {
53 struct pipes_struct *p;
54 struct pipe_rpc_fns *context_fns;
55 const char *pipe_name;
56 int ret;
57
58 pipe_name = get_pipe_name_from_syntax(talloc_tos(), syntax);
59
60 DEBUG(4,("Create pipe requested %s\n", pipe_name));
61
62 ret = make_base_pipes_struct(mem_ctx, msg_ctx, pipe_name,
63 NCALRPC, RPC_LITTLE_ENDIAN, false,
64 remote_address, NULL, &p);
65 if (ret) {
66 DEBUG(0,("ERROR! no memory for pipes_struct!\n"));
67 return NULL;
68 }
69
70 if (!init_pipe_handles(p, syntax)) {
71 DEBUG(0,("open_rpc_pipe_p: init_pipe_handles failed.\n"));
72 TALLOC_FREE(p);
73 return NULL;
74 }
75
76 p->session_info = copy_session_info(p, session_info);
77 if (p->session_info == NULL) {
78 DEBUG(0, ("open_rpc_pipe_p: copy_serverinfo failed\n"));
79 close_policy_by_pipe(p);
80 TALLOC_FREE(p);
81 return NULL;
82 }
83
84 context_fns = talloc(p, struct pipe_rpc_fns);
85 if (context_fns == NULL) {
86 DEBUG(0,("talloc() failed!\n"));
87 TALLOC_FREE(p);
88 return NULL;
89 }
90
91 context_fns->next = context_fns->prev = NULL;
92 context_fns->n_cmds = rpc_srv_get_pipe_num_cmds(syntax);
93 context_fns->cmds = rpc_srv_get_pipe_cmds(syntax);
94 context_fns->context_id = 0;
95 context_fns->syntax = *syntax;
96
97 /* add to the list of open contexts */
98 DLIST_ADD(p->contexts, context_fns);
99
100 DEBUG(4,("Created internal pipe %s\n", pipe_name));
101
102 return p;
103 }
104
105 static NTSTATUS rpcint_dispatch(struct pipes_struct *p,
106 TALLOC_CTX *mem_ctx,
107 uint32_t opnum,
108 const DATA_BLOB *in_data,
109 DATA_BLOB *out_data)
110 {
111 struct pipe_rpc_fns *fns = find_pipe_fns_by_context(p->contexts, 0);
112 uint32_t num_cmds = fns->n_cmds;
113 const struct api_struct *cmds = fns->cmds;
114 uint32_t i;
115 bool ok;
116
117 /* set opnum */
118 p->opnum = opnum;
119
120 for (i = 0; i < num_cmds; i++) {
121 if (cmds[i].opnum == opnum && cmds[i].fn != NULL) {
122 break;
123 }
124 }
125
126 if (i == num_cmds) {
127 return NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE;
128 }
129
130 p->in_data.data = *in_data;
131 p->out_data.rdata = data_blob_null;
132
133 ok = cmds[i].fn(p);
134 p->in_data.data = data_blob_null;
135 if (!ok) {
136 data_blob_free(&p->out_data.rdata);
137 talloc_free_children(p->mem_ctx);
138 return NT_STATUS_RPC_CALL_FAILED;
139 }
140
141 if (p->fault_state) {
142 NTSTATUS status;
143
144 status = NT_STATUS(p->fault_state);
145 p->fault_state = 0;
146 data_blob_free(&p->out_data.rdata);
147 talloc_free_children(p->mem_ctx);
148 return status;
149 }
150
151 *out_data = p->out_data.rdata;
152 talloc_steal(mem_ctx, out_data->data);
153 p->out_data.rdata = data_blob_null;
154
155 talloc_free_children(p->mem_ctx);
156 return NT_STATUS_OK;
157 }
158
159 struct rpcint_bh_state {
160 struct pipes_struct *p;
161 };
162
163 static bool rpcint_bh_is_connected(struct dcerpc_binding_handle *h)
164 {
165 struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
166 struct rpcint_bh_state);
167
168 if (!hs->p) {
169 return false;
170 }
171
172 return true;
173 }
174
175 static uint32_t rpcint_bh_set_timeout(struct dcerpc_binding_handle *h,
176 uint32_t timeout)
177 {
178 /* TODO: implement timeouts */
179 return UINT32_MAX;
180 }
181
182 struct rpcint_bh_raw_call_state {
183 DATA_BLOB in_data;
184 DATA_BLOB out_data;
185 uint32_t out_flags;
186 };
187
188 static struct tevent_req *rpcint_bh_raw_call_send(TALLOC_CTX *mem_ctx,
189 struct tevent_context *ev,
190 struct dcerpc_binding_handle *h,
191 const struct GUID *object,
192 uint32_t opnum,
193 uint32_t in_flags,
194 const uint8_t *in_data,
195 size_t in_length)
196 {
197 struct rpcint_bh_state *hs =
198 dcerpc_binding_handle_data(h,
199 struct rpcint_bh_state);
200 struct tevent_req *req;
201 struct rpcint_bh_raw_call_state *state;
202 bool ok;
203 NTSTATUS status;
204
205 req = tevent_req_create(mem_ctx, &state,
206 struct rpcint_bh_raw_call_state);
207 if (req == NULL) {
208 return NULL;
209 }
210 state->in_data.data = discard_const_p(uint8_t, in_data);
211 state->in_data.length = in_length;
212
213 ok = rpcint_bh_is_connected(h);
214 if (!ok) {
215 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
216 return tevent_req_post(req, ev);
217 }
218
219 /* TODO: allow async */
220 status = rpcint_dispatch(hs->p, state, opnum,
221 &state->in_data,
222 &state->out_data);
223 if (!NT_STATUS_IS_OK(status)) {
224 tevent_req_nterror(req, status);
225 return tevent_req_post(req, ev);
226 }
227
228 tevent_req_done(req);
229 return tevent_req_post(req, ev);
230 }
231
232 static NTSTATUS rpcint_bh_raw_call_recv(struct tevent_req *req,
233 TALLOC_CTX *mem_ctx,
234 uint8_t **out_data,
235 size_t *out_length,
236 uint32_t *out_flags)
237 {
238 struct rpcint_bh_raw_call_state *state =
239 tevent_req_data(req,
240 struct rpcint_bh_raw_call_state);
241 NTSTATUS status;
242
243 if (tevent_req_is_nterror(req, &status)) {
244 tevent_req_received(req);
245 return status;
246 }
247
248 *out_data = talloc_move(mem_ctx, &state->out_data.data);
249 *out_length = state->out_data.length;
250 *out_flags = 0;
251 tevent_req_received(req);
252 return NT_STATUS_OK;
253 }
254
255 struct rpcint_bh_disconnect_state {
256 uint8_t _dummy;
257 };
258
259 static struct tevent_req *rpcint_bh_disconnect_send(TALLOC_CTX *mem_ctx,
260 struct tevent_context *ev,
261 struct dcerpc_binding_handle *h)
262 {
263 struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
264 struct rpcint_bh_state);
265 struct tevent_req *req;
266 struct rpcint_bh_disconnect_state *state;
267 bool ok;
268
269 req = tevent_req_create(mem_ctx, &state,
270 struct rpcint_bh_disconnect_state);
271 if (req == NULL) {
272 return NULL;
273 }
274
275 ok = rpcint_bh_is_connected(h);
276 if (!ok) {
277 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
278 return tevent_req_post(req, ev);
279 }
280
281 /*
282 * TODO: do a real async disconnect ...
283 *
284 * For now the caller needs to free pipes_struct
285 */
286 hs->p = NULL;
287
288 tevent_req_done(req);
289 return tevent_req_post(req, ev);
290 }
291
292 static NTSTATUS rpcint_bh_disconnect_recv(struct tevent_req *req)
293 {
294 NTSTATUS status;
295
296 if (tevent_req_is_nterror(req, &status)) {
297 tevent_req_received(req);
298 return status;
299 }
300
301 tevent_req_received(req);
302 return NT_STATUS_OK;
303 }
304
305 static bool rpcint_bh_ref_alloc(struct dcerpc_binding_handle *h)
306 {
307 return true;
308 }
309
310 static void rpcint_bh_do_ndr_print(struct dcerpc_binding_handle *h,
311 int ndr_flags,
312 const void *_struct_ptr,
313 const struct ndr_interface_call *call)
314 {
315 void *struct_ptr = discard_const(_struct_ptr);
316
317 if (DEBUGLEVEL < 11) {
318 return;
319 }
320
321 if (ndr_flags & NDR_IN) {
322 ndr_print_function_debug(call->ndr_print,
323 call->name,
324 ndr_flags,
325 struct_ptr);
326 }
327 if (ndr_flags & NDR_OUT) {
328 ndr_print_function_debug(call->ndr_print,
329 call->name,
330 ndr_flags,
331 struct_ptr);
332 }
333 }
334
335 static const struct dcerpc_binding_handle_ops rpcint_bh_ops = {
336 .name = "rpcint",
337 .is_connected = rpcint_bh_is_connected,
338 .set_timeout = rpcint_bh_set_timeout,
339 .raw_call_send = rpcint_bh_raw_call_send,
340 .raw_call_recv = rpcint_bh_raw_call_recv,
341 .disconnect_send = rpcint_bh_disconnect_send,
342 .disconnect_recv = rpcint_bh_disconnect_recv,
343
344 .ref_alloc = rpcint_bh_ref_alloc,
345 .do_ndr_print = rpcint_bh_do_ndr_print,
346 };
347
348 static NTSTATUS rpcint_binding_handle_ex(TALLOC_CTX *mem_ctx,
349 const struct ndr_syntax_id *abstract_syntax,
350 const struct ndr_interface_table *ndr_table,
351 const struct tsocket_address *remote_address,
352 const struct auth_session_info *session_info,
353 struct messaging_context *msg_ctx,
354 struct dcerpc_binding_handle **binding_handle)
355 {
356 struct dcerpc_binding_handle *h;
357 struct rpcint_bh_state *hs;
358
359 if (ndr_table) {
360 abstract_syntax = &ndr_table->syntax_id;
361 }
362
363 h = dcerpc_binding_handle_create(mem_ctx,
364 &rpcint_bh_ops,
365 NULL,
366 ndr_table,
367 &hs,
368 struct rpcint_bh_state,
369 __location__);
370 if (h == NULL) {
371 return NT_STATUS_NO_MEMORY;
372 }
373 hs->p = make_internal_rpc_pipe_p(hs,
374 abstract_syntax,
375 remote_address,
376 session_info,
377 msg_ctx);
378 if (hs->p == NULL) {
379 TALLOC_FREE(h);
380 return NT_STATUS_NO_MEMORY;
381 }
382
383 *binding_handle = h;
384 return NT_STATUS_OK;
385 }
386 /**
387 * @brief Create a new DCERPC Binding Handle which uses a local dispatch function.
388 *
389 * @param[in] mem_ctx The memory context to use.
390 *
391 * @param[in] ndr_table Normally the ndr_table_<name>.
392 *
393 * @param[in] remote_address The info about the connected client.
394 *
395 * @param[in] serversupplied_info The server supplied authentication function.
396 *
397 * @param[in] msg_ctx The messaging context that can be used by the server
398 *
399 * @param[out] binding_handle A pointer to store the connected
400 * dcerpc_binding_handle
401 *
402 * @return NT_STATUS_OK on success, a corresponding NT status if an
403 * error occured.
404 *
405 * @code
406 * struct dcerpc_binding_handle *winreg_binding;
407 * NTSTATUS status;
408 *
409 * status = rpcint_binding_handle(tmp_ctx,
410 * &ndr_table_winreg,
411 * p->remote_address,
412 * p->session_info,
413 * p->msg_ctx
414 * &winreg_binding);
415 * @endcode
416 */
417 NTSTATUS rpcint_binding_handle(TALLOC_CTX *mem_ctx,
418 const struct ndr_interface_table *ndr_table,
419 const struct tsocket_address *remote_address,
420 const struct auth_session_info *session_info,
421 struct messaging_context *msg_ctx,
422 struct dcerpc_binding_handle **binding_handle)
423 {
424 return rpcint_binding_handle_ex(mem_ctx, NULL, ndr_table, remote_address,
425 session_info, msg_ctx, binding_handle);
426 }
427
428 /**
429 * @internal
430 *
431 * @brief Create a new RPC client context which uses a local transport.
432 *
433 * This creates a local transport. It is a shortcut to directly call the server
434 * functions and avoid marshalling.
435 * NOTE: this function should be used only by rpc_pipe_open_interface()
436 *
437 * @param[in] mem_ctx The memory context to use.
438 *
439 * @param[in] abstract_syntax Normally the syntax_id of the autogenerated
440 * ndr_table_<name>.
441 *
442 * @param[in] serversupplied_info The server supplied authentication function.
443 *
444 * @param[in] remote_address The client address information.
445 *
446 * @param[in] msg_ctx The messaging context to use.
447 *
448 * @param[out] presult A pointer to store the connected rpc client pipe.
449 *
450 * @return NT_STATUS_OK on success, a corresponding NT status if an
451 * error occured.
452 */
453 NTSTATUS rpc_pipe_open_internal(TALLOC_CTX *mem_ctx,
454 const struct ndr_syntax_id *abstract_syntax,
455 const struct auth_session_info *session_info,
456 const struct tsocket_address *remote_address,
457 struct messaging_context *msg_ctx,
458 struct rpc_pipe_client **presult)
459 {
460 struct rpc_pipe_client *result;
461 NTSTATUS status;
462
463 result = talloc_zero(mem_ctx, struct rpc_pipe_client);
464 if (result == NULL) {
465 return NT_STATUS_NO_MEMORY;
466 }
467
468 result->abstract_syntax = *abstract_syntax;
469 result->transfer_syntax = ndr_transfer_syntax_ndr;
470
471 if (remote_address == NULL) {
472 struct tsocket_address *local;
473 int rc;
474
475 rc = tsocket_address_inet_from_strings(mem_ctx,
476 "ip",
477 "127.0.0.1",
478 0,
479 &local);
480 if (rc < 0) {
481 TALLOC_FREE(result);
482 return NT_STATUS_NO_MEMORY;
483 }
484
485 remote_address = local;
486 }
487
488 result->max_xmit_frag = -1;
489 result->max_recv_frag = -1;
490
491 status = rpcint_binding_handle_ex(result,
492 abstract_syntax,
493 NULL,
494 remote_address,
495 session_info,
496 msg_ctx,
497 &result->binding_handle);
498 if (!NT_STATUS_IS_OK(status)) {
499 TALLOC_FREE(result);
500 return status;
501 }
502
503 *presult = result;
504 return NT_STATUS_OK;
505 }
506
507 /****************************************************************************
508 * External pipes functions
509 ***************************************************************************/
510
511
512 struct np_proxy_state *make_external_rpc_pipe_p(TALLOC_CTX *mem_ctx,
513 const char *pipe_name,
514 const struct tsocket_address *local_address,
515 const struct tsocket_address *remote_address,
516 const struct auth_session_info *session_info)
517 {
518 struct np_proxy_state *result;
519 char *socket_np_dir;
520 const char *socket_dir;
521 struct tevent_context *ev;
522 struct tevent_req *subreq;
523 struct auth_session_info_transport *session_info_t;
524 bool ok;
525 int ret;
526 int sys_errno;
527
528 result = talloc(mem_ctx, struct np_proxy_state);
529 if (result == NULL) {
530 DEBUG(0, ("talloc failed\n"));
531 return NULL;
532 }
533
534 result->read_queue = tevent_queue_create(result, "np_read");
535 if (result->read_queue == NULL) {
536 DEBUG(0, ("tevent_queue_create failed\n"));
537 goto fail;
538 }
539
540 result->write_queue = tevent_queue_create(result, "np_write");
541 if (result->write_queue == NULL) {
542 DEBUG(0, ("tevent_queue_create failed\n"));
543 goto fail;
544 }
545
546 ev = s3_tevent_context_init(talloc_tos());
547 if (ev == NULL) {
548 DEBUG(0, ("s3_tevent_context_init failed\n"));
549 goto fail;
550 }
551
552 socket_dir = lp_parm_const_string(
553 GLOBAL_SECTION_SNUM, "external_rpc_pipe", "socket_dir",
554 lp_ncalrpc_dir());
555 if (socket_dir == NULL) {
556 DEBUG(0, ("externan_rpc_pipe:socket_dir not set\n"));
557 goto fail;
558 }
559 socket_np_dir = talloc_asprintf(talloc_tos(), "%s/np", socket_dir);
560 if (socket_np_dir == NULL) {
561 DEBUG(0, ("talloc_asprintf failed\n"));
562 goto fail;
563 }
564
565 session_info_t = talloc_zero(talloc_tos(), struct auth_session_info_transport);
566 if (session_info_t == NULL) {
567 DEBUG(0, ("talloc failed\n"));
568 goto fail;
569 }
570
571 session_info_t->session_info = copy_session_info(session_info_t,
572 session_info);
573 if (session_info_t->session_info == NULL) {
574 DEBUG(0, ("copy_session_info failed\n"));
575 goto fail;
576 }
577
578 become_root();
579 subreq = tstream_npa_connect_send(talloc_tos(), ev,
580 socket_np_dir,
581 pipe_name,
582 remote_address, /* client_addr */
583 NULL, /* client_name */
584 local_address, /* server_addr */
585 NULL, /* server_name */
586 session_info_t);
587 if (subreq == NULL) {
588 unbecome_root();
589 DEBUG(0, ("tstream_npa_connect_send to %s for pipe %s and "
590 "user %s\\%s failed\n",
591 socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
592 session_info_t->session_info->info->account_name));
593 goto fail;
594 }
595 ok = tevent_req_poll(subreq, ev);
596 unbecome_root();
597 if (!ok) {
598 DEBUG(0, ("tevent_req_poll to %s for pipe %s and user %s\\%s "
599 "failed for tstream_npa_connect: %s\n",
600 socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
601 session_info_t->session_info->info->account_name,
602 strerror(errno)));
603 goto fail;
604
605 }
606 ret = tstream_npa_connect_recv(subreq, &sys_errno,
607 result,
608 &result->npipe,
609 &result->file_type,
610 &result->device_state,
611 &result->allocation_size);
612 TALLOC_FREE(subreq);
613 if (ret != 0) {
614 int l = 1;
615 if (errno == ENOENT) {
616 l = 2;
617 }
618 DEBUG(l, ("tstream_npa_connect_recv to %s for pipe %s and "
619 "user %s\\%s failed: %s\n",
620 socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
621 session_info_t->session_info->info->account_name,
622 strerror(sys_errno)));
623 goto fail;
624 }
625
626 return result;
627
628 fail:
629 TALLOC_FREE(result);
630 return NULL;
631 }
632
633 static NTSTATUS rpc_pipe_open_external(TALLOC_CTX *mem_ctx,
634 const char *pipe_name,
635 const struct ndr_syntax_id *abstract_syntax,
636 const struct auth_session_info *session_info,
637 struct rpc_pipe_client **_result)
638 {
639 struct tsocket_address *local, *remote;
640 struct rpc_pipe_client *result = NULL;
641 struct np_proxy_state *proxy_state = NULL;
642 struct pipe_auth_data *auth;
643 NTSTATUS status;
644 int ret;
645
646 /* this is an internal connection, fake up ip addresses */
647 ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
648 NULL, 0, &local);
649 if (ret) {
650 return NT_STATUS_NO_MEMORY;
651 }
652 ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
653 NULL, 0, &remote);
654 if (ret) {
655 return NT_STATUS_NO_MEMORY;
656 }
657
658 proxy_state = make_external_rpc_pipe_p(mem_ctx, pipe_name,
659 local, remote, session_info);
660 if (!proxy_state) {
661 return NT_STATUS_UNSUCCESSFUL;
662 }
663
664 result = talloc_zero(mem_ctx, struct rpc_pipe_client);
665 if (result == NULL) {
666 status = NT_STATUS_NO_MEMORY;
667 goto done;
668 }
669
670 result->abstract_syntax = *abstract_syntax;
671 result->transfer_syntax = ndr_transfer_syntax_ndr;
672
673 result->desthost = get_myname(result);
674 result->srv_name_slash = talloc_asprintf_strupper_m(
675 result, "\\\\%s", result->desthost);
676 if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
677 status = NT_STATUS_NO_MEMORY;
678 goto done;
679 }
680
681 result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
682 result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
683
684 status = rpc_transport_tstream_init(result,
685 &proxy_state->npipe,
686 &result->transport);
687 if (!NT_STATUS_IS_OK(status)) {
688 goto done;
689 }
690
691 result->binding_handle = rpccli_bh_create(result);
692 if (result->binding_handle == NULL) {
693 status = NT_STATUS_NO_MEMORY;
694 DEBUG(0, ("Failed to create binding handle.\n"));
695 goto done;
696 }
697
698 result->auth = talloc_zero(result, struct pipe_auth_data);
699 if (!result->auth) {
700 status = NT_STATUS_NO_MEMORY;
701 goto done;
702 }
703 result->auth->auth_type = DCERPC_AUTH_TYPE_NONE;
704 result->auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
705
706 status = rpccli_anon_bind_data(result, &auth);
707 if (!NT_STATUS_IS_OK(status)) {
708 DEBUG(0, ("Failed to initialize anonymous bind.\n"));
709 goto done;
710 }
711
712 status = rpc_pipe_bind(result, auth);
713 if (!NT_STATUS_IS_OK(status)) {
714 DEBUG(0, ("Failed to bind external pipe.\n"));
715 goto done;
716 }
717
718 done:
719 if (!NT_STATUS_IS_OK(status)) {
720 TALLOC_FREE(result);
721 }
722 TALLOC_FREE(proxy_state);
723 *_result = result;
724 return status;
725 }
726
727 /**
728 * @brief Create a new RPC client context which uses a local dispatch function
729 * or a remote transport, depending on rpc_server configuration for the
730 * specific service.
731 *
732 * @param[in] mem_ctx The memory context to use.
733 *
734 * @param[in] abstract_syntax Normally the syntax_id of the autogenerated
735 * ndr_table_<name>.
736 *
737 * @param[in] serversupplied_info The server supplied authentication function.
738 *
739 * @param[in] remote_address The client address information.
740 *
741 * @param[in] msg_ctx The messaging context to use.
742 *
743 * @param[out] presult A pointer to store the connected rpc client pipe.
744 *
745 * @return NT_STATUS_OK on success, a corresponding NT status if an
746 * error occured.
747 *
748 * @code
749 * struct rpc_pipe_client *winreg_pipe;
750 * NTSTATUS status;
751 *
752 * status = rpc_pipe_open_interface(tmp_ctx,
753 * &ndr_table_winreg.syntax_id,
754 * p->session_info,
755 * remote_address,
756 * &winreg_pipe);
757 * @endcode
758 */
759
760 NTSTATUS rpc_pipe_open_interface(TALLOC_CTX *mem_ctx,
761 const struct ndr_syntax_id *syntax,
762 const struct auth_session_info *session_info,
763 const struct tsocket_address *remote_address,
764 struct messaging_context *msg_ctx,
765 struct rpc_pipe_client **cli_pipe)
766 {
767 struct rpc_pipe_client *cli = NULL;
768 enum rpc_service_mode_e pipe_mode;
769 const char *pipe_name;
770 NTSTATUS status;
771 TALLOC_CTX *tmp_ctx;
772
773 if (cli_pipe && rpccli_is_connected(*cli_pipe)) {
774 return NT_STATUS_OK;
775 } else {
776 TALLOC_FREE(*cli_pipe);
777 }
778
779 tmp_ctx = talloc_stackframe();
780 if (tmp_ctx == NULL) {
781 return NT_STATUS_NO_MEMORY;
782 }
783
784 pipe_name = get_pipe_name_from_syntax(tmp_ctx, syntax);
785 if (pipe_name == NULL) {
786 status = NT_STATUS_INVALID_PARAMETER;
787 goto done;
788 }
789
790 while (pipe_name[0] == '\\') {
791 pipe_name++;
792 }
793
794 DEBUG(5, ("Connecting to %s pipe.\n", pipe_name));
795
796 pipe_mode = rpc_service_mode(pipe_name);
797
798 switch (pipe_mode) {
799 case RPC_SERVICE_MODE_EMBEDDED:
800 status = rpc_pipe_open_internal(tmp_ctx,
801 syntax, session_info,
802 remote_address, msg_ctx,
803 &cli);
804 if (!NT_STATUS_IS_OK(status)) {
805 goto done;
806 }
807 break;
808 case RPC_SERVICE_MODE_EXTERNAL:
809 /* It would be nice to just use rpc_pipe_open_ncalrpc() but
810 * for now we need to use the special proxy setup to connect
811 * to spoolssd. */
812
813 status = rpc_pipe_open_external(tmp_ctx,
814 pipe_name, syntax,
815 session_info,
816 &cli);
817 if (!NT_STATUS_IS_OK(status)) {
818 goto done;
819 }
820 break;
821 case RPC_SERVICE_MODE_DISABLED:
822 status = NT_STATUS_NOT_IMPLEMENTED;
823 DEBUG(0, ("Service pipe %s is disabled in config file: %s",
824 pipe_name, nt_errstr(status)));
825 goto done;
826 }
827
828 status = NT_STATUS_OK;
829 done:
830 if (NT_STATUS_IS_OK(status)) {
831 *cli_pipe = talloc_move(mem_ctx, &cli);
832 }
833 TALLOC_FREE(tmp_ctx);
834 return status;
835 }
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