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
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright 2015 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2018, Joyent, Inc.
*/
/*
* Server side RPC handler.
*/
#include <sys/byteorder.h>
#include <sys/uio.h>
#include <errno.h>
#include <synch.h>
#include <stdlib.h>
#include <strings.h>
#include <string.h>
#include <thread.h>
#include <libmlrpc.h>
#define NDR_PIPE_SEND(np, buf, len) \
((np)->np_send)((np), (buf), (len))
#define NDR_PIPE_RECV(np, buf, len) \
((np)->np_recv)((np), (buf), (len))
static int ndr_svc_process(ndr_xa_t *);
static int ndr_svc_bind(ndr_xa_t *);
static int ndr_svc_request(ndr_xa_t *);
static void ndr_reply_prepare_hdr(ndr_xa_t *);
static int ndr_svc_alter_context(ndr_xa_t *);
static void ndr_reply_fault(ndr_xa_t *, unsigned long);
static int ndr_recv_request(ndr_xa_t *mxa);
static int ndr_recv_frag(ndr_xa_t *mxa);
static int ndr_send_reply(ndr_xa_t *);
static int ndr_pipe_process(ndr_pipe_t *, ndr_xa_t *);
/*
* External entry point called by smbd.
*/
void
ndr_pipe_worker(ndr_pipe_t *np)
{
ndr_xa_t *mxa;
int rc;
ndr_svc_binding_pool_init(&np->np_binding, np->np_binding_pool,
NDR_N_BINDING_POOL);
if ((mxa = malloc(sizeof (*mxa))) == NULL)
return;
do {
bzero(mxa, sizeof (*mxa));
rc = ndr_pipe_process(np, mxa);
} while (rc == 0);
free(mxa);
/*
* Ensure that there are no RPC service policy handles
* (associated with this fid) left around.
*/
ndr_hdclose(np);
}
/*
* Process one server-side RPC request.
*/
static int
ndr_pipe_process(ndr_pipe_t *np, ndr_xa_t *mxa)
{
ndr_stream_t *recv_nds;
ndr_stream_t *send_nds;
int rc = ENOMEM;
mxa->pipe = np;
mxa->binding_list = np->np_binding;
if ((mxa->heap = ndr_heap_create()) == NULL)
goto out1;
recv_nds = &mxa->recv_nds;
rc = nds_initialize(recv_nds, 0, NDR_MODE_CALL_RECV, mxa->heap);
if (rc != 0)
goto out2;
send_nds = &mxa->send_nds;
rc = nds_initialize(send_nds, 0, NDR_MODE_RETURN_SEND, mxa->heap);
if (rc != 0)
goto out3;
rc = ndr_recv_request(mxa);
if (rc != 0)
goto out4;
(void) ndr_svc_process(mxa);
(void) ndr_send_reply(mxa);
rc = 0;
out4:
nds_destruct(&mxa->send_nds);
out3:
nds_destruct(&mxa->recv_nds);
out2:
ndr_heap_destroy(mxa->heap);
out1:
return (rc);
}
/*
* Receive an entire RPC request (all fragments)
* Returns zero or an NDR fault code.
*/
static int
ndr_recv_request(ndr_xa_t *mxa)
{
ndr_common_header_t *hdr = &mxa->recv_hdr.common_hdr;
ndr_stream_t *nds = &mxa->recv_nds;
unsigned long saved_size;
int rc;
rc = ndr_recv_frag(mxa);
if (rc != 0)
return (rc);
if (!NDR_IS_FIRST_FRAG(hdr->pfc_flags))
return (NDR_DRC_FAULT_DECODE_FAILED);
while (!NDR_IS_LAST_FRAG(hdr->pfc_flags)) {
rc = ndr_recv_frag(mxa);
if (rc != 0)
return (rc);
}
nds->pdu_scan_offset = 0;
/*
* This whacks nds->pdu_size, so save/restore.
* It leaves scan_offset after the header.
*/
saved_size = nds->pdu_size;
rc = ndr_decode_pdu_hdr(mxa);
nds->pdu_size = saved_size;
return (rc);
}
/*
* Read one fragment, leaving the decoded frag header in
* recv_hdr.common_hdr, and the data in the recv_nds.
*
* Returns zero or an NDR fault code.
*
* If a first frag, the header is included in the data
* placed in recv_nds (because it's not fully decoded
* until later - we only decode the common part here).
* Additional frags are placed in the recv_nds without
* the header, so that after the first frag header,
* the remaining data will be contiguous. We do this
* by simply not advancing the offset in recv_nds after
* reading and decoding these additional fragments, so
* the payload of such frags will overwrite what was
* (temporarily) the frag header.
*/
static int
ndr_recv_frag(ndr_xa_t *mxa)
{
ndr_common_header_t *hdr = &mxa->recv_hdr.common_hdr;
ndr_stream_t *nds = &mxa->recv_nds;
unsigned char *data;
unsigned long next_offset;
unsigned long pay_size;
int rc;
/* Make room for the frag header. */
next_offset = nds->pdu_scan_offset + NDR_RSP_HDR_SIZE;
if (!NDS_GROW_PDU(nds, next_offset, 0))
return (NDR_DRC_FAULT_OUT_OF_MEMORY);
/* Read the frag header. */
data = nds->pdu_base_addr + nds->pdu_scan_offset;
rc = NDR_PIPE_RECV(mxa->pipe, data, NDR_RSP_HDR_SIZE);
if (rc != 0)
return (NDR_DRC_FAULT_RPCHDR_RECEIVED_RUNT);
/*
* Decode the frag header, get the length.
* NB: It uses nds->pdu_scan_offset
*/
ndr_decode_frag_hdr(nds, hdr);
ndr_show_hdr(hdr);
if (hdr->frag_length < NDR_RSP_HDR_SIZE ||
hdr->frag_length > mxa->pipe->np_max_xmit_frag)
return (NDR_DRC_FAULT_DECODE_FAILED);
if (nds->pdu_scan_offset == 0) {
/* First frag: header stays in the data. */
nds->pdu_scan_offset = next_offset;
} /* else overwrite with the payload */
/* Make room for the payload. */
pay_size = hdr->frag_length - NDR_RSP_HDR_SIZE;
next_offset = nds->pdu_scan_offset + pay_size;
if (!NDS_GROW_PDU(nds, next_offset, 0))
return (NDR_DRC_FAULT_OUT_OF_MEMORY);
/* Read the payload. */
data = nds->pdu_base_addr + nds->pdu_scan_offset;
rc = NDR_PIPE_RECV(mxa->pipe, data, pay_size);
if (rc != 0)
return (NDR_DRC_FAULT_RPCHDR_RECEIVED_RUNT);
nds->pdu_scan_offset = next_offset;
return (NDR_DRC_OK);
}
/*
* This is the entry point for all server-side RPC processing.
* It is assumed that the PDU has already been received.
*/
static int
ndr_svc_process(ndr_xa_t *mxa)
{
int rc;
(void) ndr_reply_prepare_hdr(mxa);
switch (mxa->ptype) {
case NDR_PTYPE_BIND:
rc = ndr_svc_bind(mxa);
break;
case NDR_PTYPE_REQUEST:
rc = ndr_svc_request(mxa);
break;
case NDR_PTYPE_ALTER_CONTEXT:
rc = ndr_svc_alter_context(mxa);
break;
default:
rc = NDR_DRC_FAULT_RPCHDR_PTYPE_INVALID;
break;
}
if (NDR_DRC_IS_FAULT(rc))
ndr_reply_fault(mxa, rc);
return (rc);
}
/*
* Multiple p_cont_elem[]s, multiple transfer_syntaxes[] and multiple
* p_results[] not supported.
*/
static int
ndr_svc_bind(ndr_xa_t *mxa)
{
ndr_p_cont_list_t *cont_list;
ndr_p_result_list_t *result_list;
ndr_p_result_t *result;
unsigned p_cont_id;
ndr_binding_t *mbind;
ndr_uuid_t *as_uuid;
ndr_uuid_t *ts_uuid;
int as_vers;
int ts_vers;
ndr_service_t *msvc;
int rc;
ndr_port_any_t *sec_addr;
/* acquire targets */
cont_list = &mxa->recv_hdr.bind_hdr.p_context_elem;
result_list = &mxa->send_hdr.bind_ack_hdr.p_result_list;
result = &result_list->p_results[0];
/*
* Set up temporary secondary address port.
* We will correct this later (below).
*/
sec_addr = &mxa->send_hdr.bind_ack_hdr.sec_addr;
sec_addr->length = 13;
(void) strcpy((char *)sec_addr->port_spec, "\\PIPE\\ntsvcs");
result_list->n_results = 1;
result_list->reserved = 0;
result_list->reserved2 = 0;
result->result = NDR_PCDR_ACCEPTANCE;
result->reason = 0;
bzero(&result->transfer_syntax, sizeof (result->transfer_syntax));
/* sanity check */
if (cont_list->n_context_elem != 1 ||
cont_list->p_cont_elem[0].n_transfer_syn != 1) {
ndo_trace("ndr_svc_bind: warning: multiple p_cont_elem");
}
p_cont_id = cont_list->p_cont_elem[0].p_cont_id;
if ((mbind = ndr_svc_find_binding(mxa, p_cont_id)) != NULL) {
/*
* Duplicate presentation context id.
*/
ndo_trace("ndr_svc_bind: duplicate binding");
return (NDR_DRC_FAULT_BIND_PCONT_BUSY);
}
if ((mbind = ndr_svc_new_binding(mxa)) == NULL) {
/*
* No free binding slot
*/
result->result = NDR_PCDR_PROVIDER_REJECTION;
result->reason = NDR_PPR_LOCAL_LIMIT_EXCEEDED;
ndo_trace("ndr_svc_bind: no resources");
return (NDR_DRC_OK);
}
as_uuid = &cont_list->p_cont_elem[0].abstract_syntax.if_uuid;
as_vers = cont_list->p_cont_elem[0].abstract_syntax.if_version;
ts_uuid = &cont_list->p_cont_elem[0].transfer_syntaxes[0].if_uuid;
ts_vers = cont_list->p_cont_elem[0].transfer_syntaxes[0].if_version;
msvc = ndr_svc_lookup_uuid(as_uuid, as_vers, ts_uuid, ts_vers);
if (msvc == NULL) {
result->result = NDR_PCDR_PROVIDER_REJECTION;
result->reason = NDR_PPR_ABSTRACT_SYNTAX_NOT_SUPPORTED;
return (NDR_DRC_OK);
}
/*
* We can now use the correct secondary address port.
*/
sec_addr = &mxa->send_hdr.bind_ack_hdr.sec_addr;
sec_addr->length = strlen(msvc->sec_addr_port) + 1;
(void) strlcpy((char *)sec_addr->port_spec, msvc->sec_addr_port,
NDR_PORT_ANY_MAX_PORT_SPEC);
mbind->p_cont_id = p_cont_id;
mbind->which_side = NDR_BIND_SIDE_SERVER;
/* mbind->context set by app */
mbind->service = msvc;
mbind->instance_specific = 0;
mxa->binding = mbind;
if (msvc->bind_req) {
/*
* Call the service-specific bind() handler. If
* this fails, we shouild send a specific error
* on the bind ack.
*/
rc = (msvc->bind_req)(mxa);
if (NDR_DRC_IS_FAULT(rc)) {
mbind->service = 0; /* free binding slot */
mbind->which_side = 0;
mbind->p_cont_id = 0;
mbind->instance_specific = 0;
return (rc);
}
}
result->transfer_syntax =
cont_list->p_cont_elem[0].transfer_syntaxes[0];
return (NDR_DRC_BINDING_MADE);
}
/*
* ndr_svc_alter_context
*
* The alter context request is used to request additional presentation
* context for another interface and/or version. It is very similar to
* a bind request.
*/
static int
ndr_svc_alter_context(ndr_xa_t *mxa)
{
ndr_p_result_list_t *result_list;
ndr_p_result_t *result;
ndr_p_cont_list_t *cont_list;
ndr_binding_t *mbind;
ndr_service_t *msvc;
unsigned p_cont_id;
ndr_uuid_t *as_uuid;
ndr_uuid_t *ts_uuid;
int as_vers;
int ts_vers;
ndr_port_any_t *sec_addr;
result_list = &mxa->send_hdr.alter_context_rsp_hdr.p_result_list;
result_list->n_results = 1;
result_list->reserved = 0;
result_list->reserved2 = 0;
result = &result_list->p_results[0];
result->result = NDR_PCDR_ACCEPTANCE;
result->reason = 0;
bzero(&result->transfer_syntax, sizeof (result->transfer_syntax));
cont_list = &mxa->recv_hdr.alter_context_hdr.p_context_elem;
p_cont_id = cont_list->p_cont_elem[0].p_cont_id;
if (ndr_svc_find_binding(mxa, p_cont_id) != NULL)
return (NDR_DRC_FAULT_BIND_PCONT_BUSY);
if ((mbind = ndr_svc_new_binding(mxa)) == NULL) {
result->result = NDR_PCDR_PROVIDER_REJECTION;
result->reason = NDR_PPR_LOCAL_LIMIT_EXCEEDED;
return (NDR_DRC_OK);
}
as_uuid = &cont_list->p_cont_elem[0].abstract_syntax.if_uuid;
as_vers = cont_list->p_cont_elem[0].abstract_syntax.if_version;
ts_uuid = &cont_list->p_cont_elem[0].transfer_syntaxes[0].if_uuid;
ts_vers = cont_list->p_cont_elem[0].transfer_syntaxes[0].if_version;
msvc = ndr_svc_lookup_uuid(as_uuid, as_vers, ts_uuid, ts_vers);
if (msvc == NULL) {
result->result = NDR_PCDR_PROVIDER_REJECTION;
result->reason = NDR_PPR_ABSTRACT_SYNTAX_NOT_SUPPORTED;
return (NDR_DRC_OK);
}
mbind->p_cont_id = p_cont_id;
mbind->which_side = NDR_BIND_SIDE_SERVER;
/* mbind->context set by app */
mbind->service = msvc;
mbind->instance_specific = 0;
mxa->binding = mbind;
sec_addr = &mxa->send_hdr.alter_context_rsp_hdr.sec_addr;
sec_addr->length = 0;
bzero(sec_addr->port_spec, NDR_PORT_ANY_MAX_PORT_SPEC);
result->transfer_syntax =
cont_list->p_cont_elem[0].transfer_syntaxes[0];
return (NDR_DRC_BINDING_MADE);
}
static int
ndr_svc_request(ndr_xa_t *mxa)
{
ndr_binding_t *mbind;
ndr_service_t *msvc;
unsigned p_cont_id;
int rc;
mxa->opnum = mxa->recv_hdr.request_hdr.opnum;
p_cont_id = mxa->recv_hdr.request_hdr.p_cont_id;
if ((mbind = ndr_svc_find_binding(mxa, p_cont_id)) == NULL)
return (NDR_DRC_FAULT_REQUEST_PCONT_INVALID);
mxa->binding = mbind;
msvc = mbind->service;
/*
* Make room for the response hdr.
*/
mxa->send_nds.pdu_scan_offset = NDR_RSP_HDR_SIZE;
if (msvc->call_stub)
rc = (*msvc->call_stub)(mxa);
else
rc = ndr_generic_call_stub(mxa);
if (NDR_DRC_IS_FAULT(rc)) {
ndo_printf(0, 0, "%s[0x%02x]: 0x%04x",
msvc->name, mxa->opnum, rc);
}
return (rc);
}
/*
* The transaction and the two nds streams use the same heap, which
* should already exist at this point. The heap will also be available
* to the stub.
*/
int
ndr_generic_call_stub(ndr_xa_t *mxa)
{
ndr_binding_t *mbind = mxa->binding;
ndr_service_t *msvc = mbind->service;
ndr_typeinfo_t *intf_ti = msvc->interface_ti;
ndr_stub_table_t *ste;
int opnum = mxa->opnum;
unsigned p_len = intf_ti->c_size_fixed_part;
char *param;
int rc;
if (mxa->heap == NULL) {
ndo_printf(0, 0, "%s[0x%02x]: no heap", msvc->name, opnum);
return (NDR_DRC_FAULT_OUT_OF_MEMORY);
}
if ((ste = ndr_svc_find_stub(msvc, opnum)) == NULL) {
ndo_printf(0, 0, "%s[0x%02x]: invalid opnum",
msvc->name, opnum);
return (NDR_DRC_FAULT_REQUEST_OPNUM_INVALID);
}
if ((param = ndr_heap_malloc(mxa->heap, p_len)) == NULL)
return (NDR_DRC_FAULT_OUT_OF_MEMORY);
bzero(param, p_len);
rc = ndr_decode_call(mxa, param);
if (!NDR_DRC_IS_OK(rc))
return (rc);
rc = (*ste->func)(param, mxa);
if (rc == NDR_DRC_OK)
rc = ndr_encode_return(mxa, param);
return (rc);
}
/*
* We can perform some initial setup of the response header here.
* We also need to cache some of the information from the bind
* negotiation for use during subsequent RPC calls.
*/
static void
ndr_reply_prepare_hdr(ndr_xa_t *mxa)
{
ndr_common_header_t *rhdr = &mxa->recv_hdr.common_hdr;
ndr_common_header_t *hdr = &mxa->send_hdr.common_hdr;
hdr->rpc_vers = 5;
hdr->rpc_vers_minor = 0;
hdr->pfc_flags = NDR_PFC_FIRST_FRAG + NDR_PFC_LAST_FRAG;
hdr->packed_drep = rhdr->packed_drep;
hdr->frag_length = 0;
hdr->auth_length = 0;
hdr->call_id = rhdr->call_id;
#ifdef _BIG_ENDIAN
hdr->packed_drep.intg_char_rep = NDR_REPLAB_CHAR_ASCII
| NDR_REPLAB_INTG_BIG_ENDIAN;
#else
hdr->packed_drep.intg_char_rep = NDR_REPLAB_CHAR_ASCII
| NDR_REPLAB_INTG_LITTLE_ENDIAN;
#endif
switch (mxa->ptype) {
case NDR_PTYPE_BIND:
/*
* Compute the maximum fragment sizes for xmit/recv
* and store in the pipe endpoint. Note "xmit" is
* client-to-server; "recv" is server-to-client.
*/
if (mxa->pipe->np_max_xmit_frag >
mxa->recv_hdr.bind_hdr.max_xmit_frag)
mxa->pipe->np_max_xmit_frag =
mxa->recv_hdr.bind_hdr.max_xmit_frag;
if (mxa->pipe->np_max_recv_frag >
mxa->recv_hdr.bind_hdr.max_recv_frag)
mxa->pipe->np_max_recv_frag =
mxa->recv_hdr.bind_hdr.max_recv_frag;
hdr->ptype = NDR_PTYPE_BIND_ACK;
mxa->send_hdr.bind_ack_hdr.max_xmit_frag =
mxa->pipe->np_max_xmit_frag;
mxa->send_hdr.bind_ack_hdr.max_recv_frag =
mxa->pipe->np_max_recv_frag;
/*
* We're supposed to assign a unique "assoc group"
* (identifies this connection for the client).
* Using the pipe address is adequate.
*/
mxa->send_hdr.bind_ack_hdr.assoc_group_id =
mxa->recv_hdr.bind_hdr.assoc_group_id;
if (mxa->send_hdr.bind_ack_hdr.assoc_group_id == 0)
mxa->send_hdr.bind_ack_hdr.assoc_group_id =
(DWORD)(uintptr_t)mxa->pipe;
break;
case NDR_PTYPE_REQUEST:
hdr->ptype = NDR_PTYPE_RESPONSE;
/* mxa->send_hdr.response_hdr.alloc_hint */
mxa->send_hdr.response_hdr.p_cont_id =
mxa->recv_hdr.request_hdr.p_cont_id;
mxa->send_hdr.response_hdr.cancel_count = 0;
mxa->send_hdr.response_hdr.reserved = 0;
break;
case NDR_PTYPE_ALTER_CONTEXT:
hdr->ptype = NDR_PTYPE_ALTER_CONTEXT_RESP;
/*
* The max_xmit_frag, max_recv_frag and assoc_group_id are
* ignored by the client but it's useful to fill them in.
*/
mxa->send_hdr.alter_context_rsp_hdr.max_xmit_frag =
mxa->recv_hdr.alter_context_hdr.max_xmit_frag;
mxa->send_hdr.alter_context_rsp_hdr.max_recv_frag =
mxa->recv_hdr.alter_context_hdr.max_recv_frag;
mxa->send_hdr.alter_context_rsp_hdr.assoc_group_id =
mxa->recv_hdr.alter_context_hdr.assoc_group_id;
break;
default:
hdr->ptype = 0xFF;
}
}
/*
* Signal an RPC fault. The stream is reset and we overwrite whatever
* was in the response header with the fault information.
*/
static void
ndr_reply_fault(ndr_xa_t *mxa, unsigned long drc)
{
ndr_common_header_t *rhdr = &mxa->recv_hdr.common_hdr;
ndr_common_header_t *hdr = &mxa->send_hdr.common_hdr;
ndr_stream_t *nds = &mxa->send_nds;
unsigned long fault_status;
(void) NDS_RESET(nds);
hdr->rpc_vers = 5;
hdr->rpc_vers_minor = 0;
hdr->pfc_flags = NDR_PFC_FIRST_FRAG + NDR_PFC_LAST_FRAG;
hdr->packed_drep = rhdr->packed_drep;
hdr->frag_length = sizeof (mxa->send_hdr.fault_hdr);
hdr->auth_length = 0;
hdr->call_id = rhdr->call_id;
#ifdef _BIG_ENDIAN
hdr->packed_drep.intg_char_rep = NDR_REPLAB_CHAR_ASCII
| NDR_REPLAB_INTG_BIG_ENDIAN;
#else
hdr->packed_drep.intg_char_rep = NDR_REPLAB_CHAR_ASCII
| NDR_REPLAB_INTG_LITTLE_ENDIAN;
#endif
switch (drc & NDR_DRC_MASK_SPECIFIER) {
case NDR_DRC_FAULT_OUT_OF_MEMORY:
case NDR_DRC_FAULT_ENCODE_TOO_BIG:
fault_status = NDR_FAULT_NCA_OUT_ARGS_TOO_BIG;
break;
case NDR_DRC_FAULT_REQUEST_PCONT_INVALID:
fault_status = NDR_FAULT_NCA_INVALID_PRES_CONTEXT_ID;
break;
case NDR_DRC_FAULT_REQUEST_OPNUM_INVALID:
fault_status = NDR_FAULT_NCA_OP_RNG_ERROR;
break;
case NDR_DRC_FAULT_DECODE_FAILED:
case NDR_DRC_FAULT_ENCODE_FAILED:
fault_status = NDR_FAULT_NCA_PROTO_ERROR;
break;
default:
fault_status = NDR_FAULT_NCA_UNSPEC_REJECT;
break;
}
mxa->send_hdr.fault_hdr.common_hdr.ptype = NDR_PTYPE_FAULT;
mxa->send_hdr.fault_hdr.status = fault_status;
mxa->send_hdr.response_hdr.alloc_hint = hdr->frag_length;
}
/*
* Note that the frag_length for bind ack and alter context is
* non-standard.
*/
static int
ndr_send_reply(ndr_xa_t *mxa)
{
ndr_common_header_t *hdr = &mxa->send_hdr.common_hdr;
ndr_stream_t *nds = &mxa->send_nds;
uint8_t *pdu_buf;
unsigned long pdu_size;
unsigned long frag_size;
unsigned long pdu_data_size;
unsigned long frag_data_size;
frag_size = mxa->pipe->np_max_recv_frag;
pdu_size = nds->pdu_size;
pdu_buf = nds->pdu_base_addr;
if (pdu_size <= frag_size) {
/*
* Single fragment response. The PDU size may be zero
* here (i.e. bind or fault response). So don't make
* any assumptions about it until after the header is
* encoded.
*/
switch (hdr->ptype) {
case NDR_PTYPE_BIND_ACK:
hdr->frag_length = ndr_bind_ack_hdr_size(mxa);
break;
case NDR_PTYPE_FAULT:
/* already setup */
break;
case NDR_PTYPE_RESPONSE:
hdr->frag_length = pdu_size;
mxa->send_hdr.response_hdr.alloc_hint =
hdr->frag_length;
break;
case NDR_PTYPE_ALTER_CONTEXT_RESP:
hdr->frag_length = ndr_alter_context_rsp_hdr_size();
break;
default:
hdr->frag_length = pdu_size;
break;
}
nds->pdu_scan_offset = 0;
(void) ndr_encode_pdu_hdr(mxa);
pdu_size = nds->pdu_size;
(void) NDR_PIPE_SEND(mxa->pipe, pdu_buf, pdu_size);
return (0);
}
/*
* Multiple fragment response.
*
* We need to update the RPC header for every fragment.
*
* pdu_data_size: total data remaining to be handled
* frag_size: total fragment size including header
* frag_data_size: data in fragment
* (i.e. frag_size - NDR_RSP_HDR_SIZE)
*/
pdu_data_size = pdu_size - NDR_RSP_HDR_SIZE;
frag_data_size = frag_size - NDR_RSP_HDR_SIZE;
/*
* Send the first frag.
*/
hdr->pfc_flags = NDR_PFC_FIRST_FRAG;
hdr->frag_length = frag_size;
mxa->send_hdr.response_hdr.alloc_hint = pdu_data_size;
nds->pdu_scan_offset = 0;
(void) ndr_encode_pdu_hdr(mxa);
(void) NDR_PIPE_SEND(mxa->pipe, pdu_buf, frag_size);
pdu_data_size -= frag_data_size;
pdu_buf += frag_data_size;
/*
* Send "middle" (full-sized) fragments...
*/
hdr->pfc_flags = 0;
while (pdu_data_size > frag_data_size) {
hdr->frag_length = frag_size;
mxa->send_hdr.response_hdr.alloc_hint = pdu_data_size;
nds->pdu_scan_offset = 0;
(void) ndr_encode_pdu_hdr(mxa);
bcopy(nds->pdu_base_addr, pdu_buf, NDR_RSP_HDR_SIZE);
(void) NDR_PIPE_SEND(mxa->pipe, pdu_buf, frag_size);
pdu_data_size -= frag_data_size;
pdu_buf += frag_data_size;
}
/*
* Last frag (pdu_data_size <= frag_data_size)
*/
hdr->pfc_flags = NDR_PFC_LAST_FRAG;
frag_size = pdu_data_size + NDR_RSP_HDR_SIZE;
hdr->frag_length = frag_size;
mxa->send_hdr.response_hdr.alloc_hint = pdu_data_size;
nds->pdu_scan_offset = 0;
(void) ndr_encode_pdu_hdr(mxa);
bcopy(nds->pdu_base_addr, pdu_buf, NDR_RSP_HDR_SIZE);
(void) NDR_PIPE_SEND(mxa->pipe, pdu_buf, frag_size);
return (0);
}
|