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PEP8: fix E305: expected 2 blank lines after class or function definition, found 1
[Samba.git] / source3 / rpc_server / rpc_ncacn_np.c
blob511d54e895a67d2c7f1b5ea4aae5f95f3d1cf207
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 #include "librpc/ndr/ndr_table.h"
40 #include "rpc_server/rpc_server.h"
41
42 #undef DBGC_CLASS
43 #define DBGC_CLASS DBGC_RPC_SRV
44
45 static struct npa_state *npa_state_init(TALLOC_CTX *mem_ctx)
46 {
47 struct npa_state *npa;
48
49 npa = talloc_zero(mem_ctx, struct npa_state);
50 if (npa == NULL) {
51 return NULL;
52 }
53
54 npa->read_queue = tevent_queue_create(npa, "npa_cli_read");
55 if (npa->read_queue == NULL) {
56 DEBUG(0, ("tevent_queue_create failed\n"));
57 goto fail;
58 }
59
60 npa->write_queue = tevent_queue_create(npa, "npa_cli_write");
61 if (npa->write_queue == NULL) {
62 DEBUG(0, ("tevent_queue_create failed\n"));
63 goto fail;
64 }
65
66 return npa;
67 fail:
68 talloc_free(npa);
69 return NULL;
70 }
71
72 NTSTATUS make_internal_rpc_pipe_socketpair(
73 TALLOC_CTX *mem_ctx,
74 struct tevent_context *ev_ctx,
75 struct messaging_context *msg_ctx,
76 const char *pipe_name,
77 const struct ndr_syntax_id *syntax,
78 const struct tsocket_address *remote_address,
79 const struct tsocket_address *local_address,
80 const struct auth_session_info *session_info,
81 struct npa_state **pnpa)
82 {
83 TALLOC_CTX *tmp_ctx = talloc_stackframe();
84 struct named_pipe_client *npc;
85 struct tevent_req *subreq;
86 struct npa_state *npa;
87 NTSTATUS status;
88 int error;
89 int rc;
90
91 DEBUG(4, ("Create of internal pipe %s requested\n", pipe_name));
92
93 npa = npa_state_init(tmp_ctx);
94 if (npa == NULL) {
95 status = NT_STATUS_NO_MEMORY;
96 goto out;
97 }
98
99 npa->file_type = FILE_TYPE_MESSAGE_MODE_PIPE;
100 npa->device_state = 0xff | 0x0400 | 0x0100;
101 npa->allocation_size = 4096;
102
103 npc = named_pipe_client_init(npa,
104 ev_ctx,
105 msg_ctx,
106 pipe_name,
107 NULL, /* term_fn */
108 npa->file_type,
109 npa->device_state,
110 npa->allocation_size,
111 NULL); /* private_data */
112 if (npc == NULL) {
113 status = NT_STATUS_NO_MEMORY;
114 goto out;
115 }
116 npa->private_data = (void*) npc;
117
118 rc = tstream_npa_socketpair(npa->file_type,
119 npa,
120 &npa->stream,
121 npc,
122 &npc->tstream);
123 if (rc == -1) {
124 status = map_nt_error_from_unix(errno);
125 goto out;
126 }
127
128 npc->remote_client_addr = tsocket_address_copy(remote_address, npc);
129 if (npc->remote_client_addr == NULL) {
130 status = NT_STATUS_NO_MEMORY;
131 goto out;
132 }
133
134 npc->remote_client_name = tsocket_address_inet_addr_string(npc->remote_client_addr,
135 npc);
136 if (npc->remote_client_name == NULL) {
137 status = NT_STATUS_NO_MEMORY;
138 goto out;
139 }
140
141 npc->local_server_addr = tsocket_address_copy(local_address, npc);
142 if (npc->local_server_addr == NULL) {
143 status = NT_STATUS_NO_MEMORY;
144 goto out;
145 }
146
147 npc->local_server_name = tsocket_address_inet_addr_string(
148 npc->local_server_addr, npc);
149 if (npc->local_server_name == NULL) {
150 status = NT_STATUS_NO_MEMORY;
151 goto out;
152 }
153
154 npc->session_info = copy_session_info(npc, session_info);
155 if (npc->session_info == NULL) {
156 status = NT_STATUS_NO_MEMORY;
157 goto out;
158 }
159
160 rc = make_server_pipes_struct(npc,
161 npc->msg_ctx,
162 npc->pipe_name,
163 NCACN_NP,
164 npc->remote_client_addr,
165 npc->local_server_addr,
166 npc->session_info,
167 &npc->p,
168 &error);
169 if (rc == -1) {
170 status = map_nt_error_from_unix(error);
171 goto out;
172 }
173
174 npc->write_queue = tevent_queue_create(npc, "npa_server_write_queue");
175 if (npc->write_queue == NULL) {
176 status = NT_STATUS_NO_MEMORY;
177 goto out;
178 }
179
180 subreq = dcerpc_read_ncacn_packet_send(npc, npc->ev, npc->tstream);
181 if (subreq == NULL) {
182 DEBUG(2, ("Failed to start receiving packets\n"));
183 status = NT_STATUS_PIPE_BROKEN;
184 goto out;
185 }
186 tevent_req_set_callback(subreq, named_pipe_packet_process, npc);
187
188 *pnpa = talloc_steal(mem_ctx, npa);
189 status = NT_STATUS_OK;
190 out:
191 talloc_free(tmp_ctx);
192 return status;
193 }
194
195 /****************************************************************************
196 Make an internal namedpipes structure
197 ****************************************************************************/
198
199 struct pipes_struct *make_internal_rpc_pipe_p(TALLOC_CTX *mem_ctx,
200 const struct ndr_syntax_id *syntax,
201 const struct tsocket_address *remote_address,
202 const struct tsocket_address *local_address,
203 const struct auth_session_info *session_info,
204 struct messaging_context *msg_ctx)
205 {
206 struct pipes_struct *p;
207 struct pipe_rpc_fns *context_fns;
208 const char *pipe_name;
209 int ret;
210 const struct ndr_interface_table *table;
211
212 table = ndr_table_by_uuid(&syntax->uuid);
213 if (table == NULL) {
214 DEBUG(0,("unknown interface\n"));
215 return NULL;
216 }
217
218 pipe_name = dcerpc_default_transport_endpoint(mem_ctx, NCACN_NP, table);
219
220 DEBUG(4,("Create pipe requested %s\n", pipe_name));
221
222 ret = make_base_pipes_struct(mem_ctx, msg_ctx, pipe_name,
223 NCALRPC, RPC_LITTLE_ENDIAN,
224 remote_address, local_address, &p);
225 if (ret) {
226 DEBUG(0,("ERROR! no memory for pipes_struct!\n"));
227 return NULL;
228 }
229
230 if (!init_pipe_handles(p, syntax)) {
231 DEBUG(0,("open_rpc_pipe_p: init_pipe_handles failed.\n"));
232 TALLOC_FREE(p);
233 return NULL;
234 }
235
236 p->session_info = copy_session_info(p, session_info);
237 if (p->session_info == NULL) {
238 DEBUG(0, ("open_rpc_pipe_p: copy_serverinfo failed\n"));
239 close_policy_by_pipe(p);
240 TALLOC_FREE(p);
241 return NULL;
242 }
243
244 context_fns = talloc_zero(p, struct pipe_rpc_fns);
245 if (context_fns == NULL) {
246 DEBUG(0,("talloc() failed!\n"));
247 TALLOC_FREE(p);
248 return NULL;
249 }
250
251 context_fns->next = context_fns->prev = NULL;
252 context_fns->n_cmds = rpc_srv_get_pipe_num_cmds(syntax);
253 context_fns->cmds = rpc_srv_get_pipe_cmds(syntax);
254 context_fns->context_id = 0;
255 context_fns->syntax = *syntax;
256
257 /* add to the list of open contexts */
258 DLIST_ADD(p->contexts, context_fns);
259
260 DEBUG(4,("Created internal pipe %s\n", pipe_name));
261
262 return p;
263 }
264
265 static NTSTATUS rpcint_dispatch(struct pipes_struct *p,
266 TALLOC_CTX *mem_ctx,
267 uint32_t opnum,
268 const DATA_BLOB *in_data,
269 DATA_BLOB *out_data)
270 {
271 struct pipe_rpc_fns *fns = find_pipe_fns_by_context(p->contexts, 0);
272 uint32_t num_cmds = fns->n_cmds;
273 const struct api_struct *cmds = fns->cmds;
274 uint32_t i;
275 bool ok;
276
277 /* set opnum */
278 p->opnum = opnum;
279
280 for (i = 0; i < num_cmds; i++) {
281 if (cmds[i].opnum == opnum && cmds[i].fn != NULL) {
282 break;
283 }
284 }
285
286 if (i == num_cmds) {
287 return NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE;
288 }
289
290 p->in_data.data = *in_data;
291 p->out_data.rdata = data_blob_null;
292
293 ok = cmds[i].fn(p);
294 p->in_data.data = data_blob_null;
295 if (!ok) {
296 data_blob_free(&p->out_data.rdata);
297 talloc_free_children(p->mem_ctx);
298 return NT_STATUS_RPC_CALL_FAILED;
299 }
300
301 if (p->fault_state) {
302 NTSTATUS status;
303
304 status = NT_STATUS(p->fault_state);
305 p->fault_state = 0;
306 data_blob_free(&p->out_data.rdata);
307 talloc_free_children(p->mem_ctx);
308 return status;
309 }
310
311 *out_data = p->out_data.rdata;
312 talloc_steal(mem_ctx, out_data->data);
313 p->out_data.rdata = data_blob_null;
314
315 talloc_free_children(p->mem_ctx);
316 return NT_STATUS_OK;
317 }
318
319 struct rpcint_bh_state {
320 struct pipes_struct *p;
321 };
322
323 static bool rpcint_bh_is_connected(struct dcerpc_binding_handle *h)
324 {
325 struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
326 struct rpcint_bh_state);
327
328 if (!hs->p) {
329 return false;
330 }
331
332 return true;
333 }
334
335 static uint32_t rpcint_bh_set_timeout(struct dcerpc_binding_handle *h,
336 uint32_t timeout)
337 {
338 /* TODO: implement timeouts */
339 return UINT32_MAX;
340 }
341
342 struct rpcint_bh_raw_call_state {
343 DATA_BLOB in_data;
344 DATA_BLOB out_data;
345 uint32_t out_flags;
346 };
347
348 static struct tevent_req *rpcint_bh_raw_call_send(TALLOC_CTX *mem_ctx,
349 struct tevent_context *ev,
350 struct dcerpc_binding_handle *h,
351 const struct GUID *object,
352 uint32_t opnum,
353 uint32_t in_flags,
354 const uint8_t *in_data,
355 size_t in_length)
356 {
357 struct rpcint_bh_state *hs =
358 dcerpc_binding_handle_data(h,
359 struct rpcint_bh_state);
360 struct tevent_req *req;
361 struct rpcint_bh_raw_call_state *state;
362 bool ok;
363 NTSTATUS status;
364
365 req = tevent_req_create(mem_ctx, &state,
366 struct rpcint_bh_raw_call_state);
367 if (req == NULL) {
368 return NULL;
369 }
370 state->in_data.data = discard_const_p(uint8_t, in_data);
371 state->in_data.length = in_length;
372
373 ok = rpcint_bh_is_connected(h);
374 if (!ok) {
375 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
376 return tevent_req_post(req, ev);
377 }
378
379 /* TODO: allow async */
380 status = rpcint_dispatch(hs->p, state, opnum,
381 &state->in_data,
382 &state->out_data);
383 if (!NT_STATUS_IS_OK(status)) {
384 tevent_req_nterror(req, status);
385 return tevent_req_post(req, ev);
386 }
387
388 tevent_req_done(req);
389 return tevent_req_post(req, ev);
390 }
391
392 static NTSTATUS rpcint_bh_raw_call_recv(struct tevent_req *req,
393 TALLOC_CTX *mem_ctx,
394 uint8_t **out_data,
395 size_t *out_length,
396 uint32_t *out_flags)
397 {
398 struct rpcint_bh_raw_call_state *state =
399 tevent_req_data(req,
400 struct rpcint_bh_raw_call_state);
401 NTSTATUS status;
402
403 if (tevent_req_is_nterror(req, &status)) {
404 tevent_req_received(req);
405 return status;
406 }
407
408 *out_data = talloc_move(mem_ctx, &state->out_data.data);
409 *out_length = state->out_data.length;
410 *out_flags = 0;
411 tevent_req_received(req);
412 return NT_STATUS_OK;
413 }
414
415 struct rpcint_bh_disconnect_state {
416 uint8_t _dummy;
417 };
418
419 static struct tevent_req *rpcint_bh_disconnect_send(TALLOC_CTX *mem_ctx,
420 struct tevent_context *ev,
421 struct dcerpc_binding_handle *h)
422 {
423 struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
424 struct rpcint_bh_state);
425 struct tevent_req *req;
426 struct rpcint_bh_disconnect_state *state;
427 bool ok;
428
429 req = tevent_req_create(mem_ctx, &state,
430 struct rpcint_bh_disconnect_state);
431 if (req == NULL) {
432 return NULL;
433 }
434
435 ok = rpcint_bh_is_connected(h);
436 if (!ok) {
437 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
438 return tevent_req_post(req, ev);
439 }
440
441 /*
442 * TODO: do a real async disconnect ...
443 *
444 * For now the caller needs to free pipes_struct
445 */
446 hs->p = NULL;
447
448 tevent_req_done(req);
449 return tevent_req_post(req, ev);
450 }
451
452 static NTSTATUS rpcint_bh_disconnect_recv(struct tevent_req *req)
453 {
454 NTSTATUS status;
455
456 if (tevent_req_is_nterror(req, &status)) {
457 tevent_req_received(req);
458 return status;
459 }
460
461 tevent_req_received(req);
462 return NT_STATUS_OK;
463 }
464
465 static bool rpcint_bh_ref_alloc(struct dcerpc_binding_handle *h)
466 {
467 return true;
468 }
469
470 static void rpcint_bh_do_ndr_print(struct dcerpc_binding_handle *h,
471 int ndr_flags,
472 const void *_struct_ptr,
473 const struct ndr_interface_call *call)
474 {
475 void *struct_ptr = discard_const(_struct_ptr);
476
477 if (DEBUGLEVEL < 11) {
478 return;
479 }
480
481 if (ndr_flags & NDR_IN) {
482 ndr_print_function_debug(call->ndr_print,
483 call->name,
484 ndr_flags,
485 struct_ptr);
486 }
487 if (ndr_flags & NDR_OUT) {
488 ndr_print_function_debug(call->ndr_print,
489 call->name,
490 ndr_flags,
491 struct_ptr);
492 }
493 }
494
495 static const struct dcerpc_binding_handle_ops rpcint_bh_ops = {
496 .name = "rpcint",
497 .is_connected = rpcint_bh_is_connected,
498 .set_timeout = rpcint_bh_set_timeout,
499 .raw_call_send = rpcint_bh_raw_call_send,
500 .raw_call_recv = rpcint_bh_raw_call_recv,
501 .disconnect_send = rpcint_bh_disconnect_send,
502 .disconnect_recv = rpcint_bh_disconnect_recv,
503
504 .ref_alloc = rpcint_bh_ref_alloc,
505 .do_ndr_print = rpcint_bh_do_ndr_print,
506 };
507
508 static NTSTATUS rpcint_binding_handle_ex(TALLOC_CTX *mem_ctx,
509 const struct ndr_syntax_id *abstract_syntax,
510 const struct ndr_interface_table *ndr_table,
511 const struct tsocket_address *remote_address,
512 const struct tsocket_address *local_address,
513 const struct auth_session_info *session_info,
514 struct messaging_context *msg_ctx,
515 struct dcerpc_binding_handle **binding_handle)
516 {
517 struct dcerpc_binding_handle *h;
518 struct rpcint_bh_state *hs;
519
520 if (ndr_table) {
521 abstract_syntax = &ndr_table->syntax_id;
522 }
523
524 h = dcerpc_binding_handle_create(mem_ctx,
525 &rpcint_bh_ops,
526 NULL,
527 ndr_table,
528 &hs,
529 struct rpcint_bh_state,
530 __location__);
531 if (h == NULL) {
532 return NT_STATUS_NO_MEMORY;
533 }
534 hs->p = make_internal_rpc_pipe_p(hs,
535 abstract_syntax,
536 remote_address,
537 local_address,
538 session_info,
539 msg_ctx);
540 if (hs->p == NULL) {
541 TALLOC_FREE(h);
542 return NT_STATUS_NO_MEMORY;
543 }
544
545 *binding_handle = h;
546 return NT_STATUS_OK;
547 }
548 /**
549 * @brief Create a new DCERPC Binding Handle which uses a local dispatch function.
550 *
551 * @param[in] mem_ctx The memory context to use.
552 *
553 * @param[in] ndr_table Normally the ndr_table_<name>.
554 *
555 * @param[in] remote_address The info about the connected client.
556 *
557 * @param[in] serversupplied_info The server supplied authentication function.
558 *
559 * @param[in] msg_ctx The messaging context that can be used by the server
560 *
561 * @param[out] binding_handle A pointer to store the connected
562 * dcerpc_binding_handle
563 *
564 * @return NT_STATUS_OK on success, a corresponding NT status if an
565 * error occurred.
566 *
567 * @code
568 * struct dcerpc_binding_handle *winreg_binding;
569 * NTSTATUS status;
570 *
571 * status = rpcint_binding_handle(tmp_ctx,
572 * &ndr_table_winreg,
573 * p->remote_address,
574 * p->session_info,
575 * p->msg_ctx
576 * &winreg_binding);
577 * @endcode
578 */
579 NTSTATUS rpcint_binding_handle(TALLOC_CTX *mem_ctx,
580 const struct ndr_interface_table *ndr_table,
581 const struct tsocket_address *remote_address,
582 const struct tsocket_address *local_address,
583 const struct auth_session_info *session_info,
584 struct messaging_context *msg_ctx,
585 struct dcerpc_binding_handle **binding_handle)
586 {
587 return rpcint_binding_handle_ex(mem_ctx, NULL, ndr_table, remote_address,
588 local_address, session_info,
589 msg_ctx, binding_handle);
590 }
591
592 /**
593 * @internal
594 *
595 * @brief Create a new RPC client context which uses a local transport.
596 *
597 * This creates a local transport. It is a shortcut to directly call the server
598 * functions and avoid marshalling.
599 * NOTE: this function should be used only by rpc_pipe_open_interface()
600 *
601 * @param[in] mem_ctx The memory context to use.
602 *
603 * @param[in] ndr_table the ndr_table_<name> structure.
604 *
605 * @param[in] serversupplied_info The server supplied authentication function.
606 *
607 * @param[in] remote_address The client address information.
608 *
609 * @param[in] msg_ctx The messaging context to use.
610 *
611 * @param[out] presult A pointer to store the connected rpc client pipe.
612 *
613 * @return NT_STATUS_OK on success, a corresponding NT status if an
614 * error occurred.
615 */
616 NTSTATUS rpc_pipe_open_internal(TALLOC_CTX *mem_ctx,
617 const struct ndr_interface_table *ndr_table,
618 const struct auth_session_info *session_info,
619 const struct tsocket_address *remote_address,
620 const struct tsocket_address *local_address,
621 struct messaging_context *msg_ctx,
622 struct rpc_pipe_client **presult)
623 {
624 struct rpc_pipe_client *result;
625 NTSTATUS status;
626
627 result = talloc_zero(mem_ctx, struct rpc_pipe_client);
628 if (result == NULL) {
629 return NT_STATUS_NO_MEMORY;
630 }
631
632 result->abstract_syntax = ndr_table->syntax_id;
633 result->transfer_syntax = ndr_transfer_syntax_ndr;
634
635 if (remote_address == NULL) {
636 struct tsocket_address *local;
637 int rc;
638
639 rc = tsocket_address_inet_from_strings(mem_ctx,
640 "ip",
641 "127.0.0.1",
642 0,
643 &local);
644 if (rc < 0) {
645 TALLOC_FREE(result);
646 return NT_STATUS_NO_MEMORY;
647 }
648
649 remote_address = local;
650 }
651
652 result->max_xmit_frag = -1;
653
654 status = rpcint_binding_handle(result,
655 ndr_table,
656 remote_address,
657 local_address,
658 session_info,
659 msg_ctx,
660 &result->binding_handle);
661 if (!NT_STATUS_IS_OK(status)) {
662 TALLOC_FREE(result);
663 return status;
664 }
665
666 *presult = result;
667 return NT_STATUS_OK;
668 }
669
670 /****************************************************************************
671 * External pipes functions
672 ***************************************************************************/
673
674 NTSTATUS make_external_rpc_pipe(TALLOC_CTX *mem_ctx,
675 const char *pipe_name,
676 const struct tsocket_address *remote_client_address,
677 const struct tsocket_address *local_server_address,
678 const struct auth_session_info *session_info,
679 struct npa_state **pnpa)
680 {
681 TALLOC_CTX *tmp_ctx = talloc_stackframe();
682 struct auth_session_info_transport *session_info_t;
683 struct tevent_context *ev_ctx;
684 struct tevent_req *subreq;
685 const char *socket_np_dir;
686 const char *socket_dir;
687 struct npa_state *npa;
688 int sys_errno;
689 NTSTATUS status;
690 int rc = -1;
691 bool ok;
692
693 npa = npa_state_init(tmp_ctx);
694 if (npa == NULL) {
695 status = NT_STATUS_NO_MEMORY;
696 goto out;
697 }
698
699 socket_dir = lp_parm_const_string(GLOBAL_SECTION_SNUM,
700 "external_rpc_pipe",
701 "socket_dir",
702 lp_ncalrpc_dir());
703 if (socket_dir == NULL) {
704 DEBUG(0, ("external_rpc_pipe: socket_dir not set\n"));
705 status = NT_STATUS_PIPE_NOT_AVAILABLE;
706 goto out;
707 }
708
709 socket_np_dir = talloc_asprintf(tmp_ctx, "%s/np", socket_dir);
710 if (socket_np_dir == NULL) {
711 DEBUG(0, ("talloc_asprintf failed\n"));
712 status = NT_STATUS_NO_MEMORY;
713 goto out;
714 }
715
716 session_info_t = talloc_zero(tmp_ctx,
717 struct auth_session_info_transport);
718 if (session_info_t == NULL) {
719 DEBUG(0, ("talloc failed\n"));
720 status = NT_STATUS_NO_MEMORY;
721 goto out;
722 }
723
724 session_info_t->session_info = copy_session_info(session_info_t,
725 session_info);
726 if (session_info_t->session_info == NULL) {
727 DEBUG(0, ("copy_session_info failed\n"));
728 status = NT_STATUS_NO_MEMORY;
729 goto out;
730 }
731
732 ev_ctx = samba_tevent_context_init(tmp_ctx);
733 if (ev_ctx == NULL) {
734 DEBUG(0, ("samba_tevent_context_init failed\n"));
735 status = NT_STATUS_NO_MEMORY;
736 goto out;
737 }
738
739 become_root();
740 subreq = tstream_npa_connect_send(tmp_ctx,
741 ev_ctx,
742 socket_np_dir,
743 pipe_name,
744 remote_client_address,
745 NULL, /* client_name */
746 local_server_address,
747 NULL, /* server_name */
748 session_info_t);
749 if (subreq == NULL) {
750 unbecome_root();
751 DEBUG(0, ("tstream_npa_connect_send to %s for pipe %s and "
752 "user %s\\%s failed\n",
753 socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
754 session_info_t->session_info->info->account_name));
755 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
756 goto out;
757 }
758 ok = tevent_req_poll(subreq, ev_ctx);
759 unbecome_root();
760 if (!ok) {
761 DEBUG(0, ("tevent_req_poll to %s for pipe %s and user %s\\%s "
762 "failed for tstream_npa_connect: %s\n",
763 socket_np_dir,
764 pipe_name,
765 session_info_t->session_info->info->domain_name,
766 session_info_t->session_info->info->account_name,
767 strerror(errno)));
768 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
769 goto out;
770 }
771
772 rc = tstream_npa_connect_recv(subreq,
773 &sys_errno,
774 npa,
775 &npa->stream,
776 &npa->file_type,
777 &npa->device_state,
778 &npa->allocation_size);
779 talloc_free(subreq);
780 if (rc != 0) {
781 int l = 1;
782
783 if (errno == ENOENT) {
784 l = 2;
785 }
786
787 DEBUG(l, ("tstream_npa_connect_recv to %s for pipe %s and "
788 "user %s\\%s failed: %s\n",
789 socket_np_dir,
790 pipe_name,
791 session_info_t->session_info->info->domain_name,
792 session_info_t->session_info->info->account_name,
793 strerror(sys_errno)));
794 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
795 goto out;
796 }
797
798 *pnpa = talloc_steal(mem_ctx, npa);
799 status = NT_STATUS_OK;
800 out:
801 talloc_free(tmp_ctx);
802
803 return status;
804 }
805
806 struct np_proxy_state *make_external_rpc_pipe_p(TALLOC_CTX *mem_ctx,
807 const char *pipe_name,
808 const struct tsocket_address *remote_client_address,
809 const struct tsocket_address *local_server_address,
810 const struct auth_session_info *session_info)
811 {
812 struct np_proxy_state *result;
813 char *socket_np_dir;
814 const char *socket_dir;
815 struct tevent_context *ev;
816 struct tevent_req *subreq;
817 struct auth_session_info_transport *session_info_t;
818 bool ok;
819 int ret;
820 int sys_errno;
821
822 result = talloc(mem_ctx, struct np_proxy_state);
823 if (result == NULL) {
824 DEBUG(0, ("talloc failed\n"));
825 return NULL;
826 }
827
828 result->read_queue = tevent_queue_create(result, "np_read");
829 if (result->read_queue == NULL) {
830 DEBUG(0, ("tevent_queue_create failed\n"));
831 goto fail;
832 }
833
834 result->write_queue = tevent_queue_create(result, "np_write");
835 if (result->write_queue == NULL) {
836 DEBUG(0, ("tevent_queue_create failed\n"));
837 goto fail;
838 }
839
840 ev = samba_tevent_context_init(talloc_tos());
841 if (ev == NULL) {
842 DEBUG(0, ("samba_tevent_context_init failed\n"));
843 goto fail;
844 }
845
846 socket_dir = lp_parm_const_string(
847 GLOBAL_SECTION_SNUM, "external_rpc_pipe", "socket_dir",
848 lp_ncalrpc_dir());
849 if (socket_dir == NULL) {
850 DEBUG(0, ("external_rpc_pipe:socket_dir not set\n"));
851 goto fail;
852 }
853 socket_np_dir = talloc_asprintf(talloc_tos(), "%s/np", socket_dir);
854 if (socket_np_dir == NULL) {
855 DEBUG(0, ("talloc_asprintf failed\n"));
856 goto fail;
857 }
858
859 session_info_t = talloc_zero(talloc_tos(), struct auth_session_info_transport);
860 if (session_info_t == NULL) {
861 DEBUG(0, ("talloc failed\n"));
862 goto fail;
863 }
864
865 session_info_t->session_info = copy_session_info(session_info_t,
866 session_info);
867 if (session_info_t->session_info == NULL) {
868 DEBUG(0, ("copy_session_info failed\n"));
869 goto fail;
870 }
871
872 become_root();
873 subreq = tstream_npa_connect_send(talloc_tos(), ev,
874 socket_np_dir,
875 pipe_name,
876 remote_client_address,
877 NULL, /* client_name */
878 local_server_address,
879 NULL, /* server_name */
880 session_info_t);
881 if (subreq == NULL) {
882 unbecome_root();
883 DEBUG(0, ("tstream_npa_connect_send to %s for pipe %s and "
884 "user %s\\%s failed\n",
885 socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
886 session_info_t->session_info->info->account_name));
887 goto fail;
888 }
889 ok = tevent_req_poll(subreq, ev);
890 unbecome_root();
891 if (!ok) {
892 DEBUG(0, ("tevent_req_poll to %s for pipe %s and user %s\\%s "
893 "failed for tstream_npa_connect: %s\n",
894 socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
895 session_info_t->session_info->info->account_name,
896 strerror(errno)));
897 goto fail;
898
899 }
900 ret = tstream_npa_connect_recv(subreq, &sys_errno,
901 result,
902 &result->npipe,
903 &result->file_type,
904 &result->device_state,
905 &result->allocation_size);
906 TALLOC_FREE(subreq);
907 if (ret != 0) {
908 int l = 1;
909 if (errno == ENOENT) {
910 l = 2;
911 }
912 DEBUG(l, ("tstream_npa_connect_recv to %s for pipe %s and "
913 "user %s\\%s failed: %s\n",
914 socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
915 session_info_t->session_info->info->account_name,
916 strerror(sys_errno)));
917 goto fail;
918 }
919
920 return result;
921
922 fail:
923 TALLOC_FREE(result);
924 return NULL;
925 }
926
927 static NTSTATUS rpc_pipe_open_external(TALLOC_CTX *mem_ctx,
928 const char *pipe_name,
929 const struct ndr_interface_table *table,
930 const struct auth_session_info *session_info,
931 const struct tsocket_address *remote_client_address,
932 const struct tsocket_address *local_server_address,
933 struct rpc_pipe_client **_result)
934 {
935 struct rpc_pipe_client *result = NULL;
936 struct np_proxy_state *proxy_state = NULL;
937 struct pipe_auth_data *auth;
938 struct tsocket_address *remote_client_addr;
939 struct tsocket_address *local_server_addr;
940 NTSTATUS status;
941 int ret;
942
943 if (local_server_address == NULL) {
944 /* this is an internal connection, fake up ip addresses */
945 ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
946 NULL, 0, &local_server_addr);
947 if (ret) {
948 return NT_STATUS_NO_MEMORY;
949 }
950 local_server_address = local_server_addr;
951 }
952
953 if (remote_client_address == NULL) {
954 /* this is an internal connection, fake up ip addresses */
955 ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
956 NULL, 0, &remote_client_addr);
957 if (ret) {
958 return NT_STATUS_NO_MEMORY;
959 }
960 remote_client_address = remote_client_addr;
961 }
962
963 proxy_state = make_external_rpc_pipe_p(mem_ctx, pipe_name,
964 remote_client_address,
965 local_server_address,
966 session_info);
967 if (!proxy_state) {
968 DEBUG(1, ("Unable to make proxy_state for connection to %s.\n", pipe_name));
969 return NT_STATUS_UNSUCCESSFUL;
970 }
971
972 result = talloc_zero(mem_ctx, struct rpc_pipe_client);
973 if (result == NULL) {
974 status = NT_STATUS_NO_MEMORY;
975 goto done;
976 }
977
978 result->abstract_syntax = table->syntax_id;
979 result->transfer_syntax = ndr_transfer_syntax_ndr;
980
981 result->desthost = get_myname(result);
982 result->srv_name_slash = talloc_asprintf_strupper_m(
983 result, "\\\\%s", result->desthost);
984 if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
985 status = NT_STATUS_NO_MEMORY;
986 goto done;
987 }
988
989 result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
990
991 status = rpc_transport_tstream_init(result,
992 &proxy_state->npipe,
993 &result->transport);
994 if (!NT_STATUS_IS_OK(status)) {
995 goto done;
996 }
997
998 result->binding_handle = rpccli_bh_create(result, NULL, table);
999 if (result->binding_handle == NULL) {
1000 status = NT_STATUS_NO_MEMORY;
1001 DEBUG(0, ("Failed to create binding handle.\n"));
1002 goto done;
1003 }
1004
1005 result->auth = talloc_zero(result, struct pipe_auth_data);
1006 if (!result->auth) {
1007 status = NT_STATUS_NO_MEMORY;
1008 goto done;
1009 }
1010 result->auth->auth_type = DCERPC_AUTH_TYPE_NONE;
1011 result->auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
1012 result->auth->auth_context_id = 0;
1013
1014 status = rpccli_anon_bind_data(result, &auth);
1015 if (!NT_STATUS_IS_OK(status)) {
1016 DEBUG(0, ("Failed to initialize anonymous bind.\n"));
1017 goto done;
1018 }
1019
1020 status = rpc_pipe_bind(result, auth);
1021 if (!NT_STATUS_IS_OK(status)) {
1022 DEBUG(0, ("Failed to bind external pipe.\n"));
1023 goto done;
1024 }
1025
1026 done:
1027 if (!NT_STATUS_IS_OK(status)) {
1028 TALLOC_FREE(result);
1029 }
1030 TALLOC_FREE(proxy_state);
1031 *_result = result;
1032 return status;
1033 }
1034
1035 /**
1036 * @brief Create a new RPC client context which uses a local dispatch function
1037 * or a remote transport, depending on rpc_server configuration for the
1038 * specific service.
1039 *
1040 * @param[in] mem_ctx The memory context to use.
1041 *
1042 * @param[in] abstract_syntax Normally the syntax_id of the autogenerated
1043 * ndr_table_<name>.
1044 *
1045 * @param[in] serversupplied_info The server supplied authentication function.
1046 *
1047 * @param[in] remote_address The client address information.
1048 *
1049 * @param[in] msg_ctx The messaging context to use.
1050 *
1051 * @param[out] presult A pointer to store the connected rpc client pipe.
1052 *
1053 * @return NT_STATUS_OK on success, a corresponding NT status if an
1054 * error occurred.
1055 *
1056 * @code
1057 * struct rpc_pipe_client *winreg_pipe;
1058 * NTSTATUS status;
1059 *
1060 * status = rpc_pipe_open_interface(tmp_ctx,
1061 * &ndr_table_winreg.syntax_id,
1062 * p->session_info,
1063 * remote_address,
1064 * &winreg_pipe);
1065 * @endcode
1066 */
1067
1068 NTSTATUS rpc_pipe_open_interface(TALLOC_CTX *mem_ctx,
1069 const struct ndr_interface_table *table,
1070 const struct auth_session_info *session_info,
1071 const struct tsocket_address *remote_address,
1072 const struct tsocket_address *local_address,
1073 struct messaging_context *msg_ctx,
1074 struct rpc_pipe_client **cli_pipe)
1075 {
1076 struct rpc_pipe_client *cli = NULL;
1077 enum rpc_service_mode_e pipe_mode;
1078 const char *pipe_name;
1079 NTSTATUS status;
1080 TALLOC_CTX *tmp_ctx;
1081
1082 if (cli_pipe != NULL) {
1083 if (rpccli_is_connected(*cli_pipe)) {
1084 return NT_STATUS_OK;
1085 } else {
1086 TALLOC_FREE(*cli_pipe);
1087 }
1088 }
1089
1090 tmp_ctx = talloc_stackframe();
1091 if (tmp_ctx == NULL) {
1092 return NT_STATUS_NO_MEMORY;
1093 }
1094
1095 pipe_name = dcerpc_default_transport_endpoint(mem_ctx, NCACN_NP, table);
1096 if (pipe_name == NULL) {
1097 DEBUG(1, ("Unable to find pipe name to forward %s to.\n", table->name));
1098 status = NT_STATUS_INVALID_PARAMETER;
1099 goto done;
1100 }
1101
1102 while (pipe_name[0] == '\\') {
1103 pipe_name++;
1104 }
1105
1106 DEBUG(5, ("Connecting to %s pipe.\n", pipe_name));
1107
1108 pipe_mode = rpc_service_mode(pipe_name);
1109
1110 switch (pipe_mode) {
1111 case RPC_SERVICE_MODE_EMBEDDED:
1112 status = rpc_pipe_open_internal(tmp_ctx,
1113 table, session_info,
1114 remote_address, local_address,
1115 msg_ctx,
1116 &cli);
1117 if (!NT_STATUS_IS_OK(status)) {
1118 goto done;
1119 }
1120 break;
1121 case RPC_SERVICE_MODE_EXTERNAL:
1122 /* It would be nice to just use rpc_pipe_open_ncalrpc() but
1123 * for now we need to use the special proxy setup to connect
1124 * to spoolssd. */
1125
1126 status = rpc_pipe_open_external(tmp_ctx,
1127 pipe_name, table,
1128 session_info,
1129 remote_address, local_address,
1130 &cli);
1131 if (!NT_STATUS_IS_OK(status)) {
1132 goto done;
1133 }
1134 break;
1135 case RPC_SERVICE_MODE_DISABLED:
1136 status = NT_STATUS_NOT_IMPLEMENTED;
1137 DEBUG(0, ("Service pipe %s is disabled in config file: %s",
1138 pipe_name, nt_errstr(status)));
1139 goto done;
1140 }
1141
1142 status = NT_STATUS_OK;
1143 done:
1144 if (NT_STATUS_IS_OK(status) && cli_pipe != NULL) {
1145 *cli_pipe = talloc_move(mem_ctx, &cli);
1146 }
1147 TALLOC_FREE(tmp_ctx);
1148 return status;
1149 }
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