summaryrefslogtreecommitdiff
path: root/source4/ntvfs/ipc/ipc_rap.c
blob: 347ff39d974e7b40c43e8edb85e42714eddd47cb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
/* 
   Unix SMB/CIFS implementation.
   RAP handlers

   Copyright (C) Volker Lendecke 2004

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

#define NERR_Success 0
#define NERR_badpass 86
#define NERR_notsupported 50

struct rap_string_heap {
	TALLOC_CTX *mem_ctx;
	int offset;
	int num_strings;
	const char **strings;
};

struct rap_heap_save {
	int offset, num_strings;
};

static void rap_heap_save(struct rap_string_heap *heap,
			  struct rap_heap_save *save)
{
	save->offset = heap->offset;
	save->num_strings = heap->num_strings;
}

static void rap_heap_restore(struct rap_string_heap *heap,
			     struct rap_heap_save *save)
{
	heap->offset = save->offset;
	heap->num_strings = save->num_strings;
}

struct rap_call {
	TALLOC_CTX *mem_ctx;
	uint16 callno;
	const char *paramdesc;
	const char *datadesc;

	uint16 status;
	uint16 convert;

	uint16 rcv_paramlen, rcv_datalen;

	struct ndr_push *ndr_push_param;
	struct ndr_push *ndr_push_data;
	struct rap_string_heap *heap;

	struct ndr_pull *ndr_pull_param;
	struct ndr_pull *ndr_pull_data;
};

#define RAPNDR_FLAGS (LIBNDR_FLAG_NOALIGN|LIBNDR_FLAG_STR_ASCII|LIBNDR_FLAG_STR_NULLTERM);

static struct rap_call *new_rap_srv_call(TALLOC_CTX *mem_ctx,
					 struct smb_trans2 *trans)
{
	struct rap_call *call;

	call = talloc_p(mem_ctx, struct rap_call);

	if (call == NULL)
		return NULL;

	ZERO_STRUCTP(call);

	call->mem_ctx = mem_ctx;

	call->ndr_pull_param = ndr_pull_init_blob(&trans->in.params, mem_ctx);
	call->ndr_pull_param->flags = RAPNDR_FLAGS;

	call->ndr_pull_data = ndr_pull_init_blob(&trans->in.data, mem_ctx);
	call->ndr_pull_data->flags = RAPNDR_FLAGS;

	call->heap = talloc_p(mem_ctx, struct rap_string_heap);

	if (call->heap == NULL)
		return NULL;

	ZERO_STRUCTP(call->heap);

	call->heap->mem_ctx = mem_ctx;

	return call;
}

static NTSTATUS rap_srv_pull_word(struct rap_call *call, uint16 *result)
{
	if (*call->paramdesc++ != 'W')
		return NT_STATUS_INVALID_PARAMETER;

	return ndr_pull_uint16(call->ndr_pull_param, result);
}

static NTSTATUS rap_srv_pull_dword(struct rap_call *call, uint32 *result)
{
	if (*call->paramdesc++ != 'D')
		return NT_STATUS_INVALID_PARAMETER;

	return ndr_pull_uint32(call->ndr_pull_param, result);
}

static NTSTATUS rap_srv_pull_string(struct rap_call *call, const char **result)
{
	char paramdesc = *call->paramdesc++;

	if (paramdesc == 'O') {
		*result = NULL;
		return NT_STATUS_OK;
	}

	if (paramdesc != 'z')
		return NT_STATUS_INVALID_PARAMETER;

	return ndr_pull_string(call->ndr_pull_param, NDR_SCALARS, result);
}

static NTSTATUS rap_srv_pull_bufsize(struct rap_call *call, uint16 *bufsize)
{
	NTSTATUS result;

	if ( (*call->paramdesc++ != 'r') || (*call->paramdesc++ != 'L') )
		return NT_STATUS_INVALID_PARAMETER;

	result = ndr_pull_uint16(call->ndr_pull_param, bufsize);

	if (!NT_STATUS_IS_OK(result))
		return result;

	call->heap->offset = *bufsize;

	return NT_STATUS_OK;
}

static NTSTATUS rap_srv_pull_expect_multiple(struct rap_call *call)
{
	if ( (*call->paramdesc++ != 'e') || (*call->paramdesc++ != 'h') )
		return NT_STATUS_INVALID_PARAMETER;

	return NT_STATUS_OK;
}

static NTSTATUS rap_push_string(struct ndr_push *data_push,
				struct rap_string_heap *heap,
				const char *str)
{
	size_t space;

	if (str == NULL)
		str = "";

	space = strlen(str)+1;

	if (heap->offset < space)
		return NT_STATUS_BUFFER_TOO_SMALL;

	heap->offset -= space;

	NDR_CHECK(ndr_push_uint16(data_push, heap->offset));
	NDR_CHECK(ndr_push_uint16(data_push, 0));

	heap->strings = talloc_realloc(heap->strings,
				       sizeof(*heap->strings) *
				       (heap->num_strings + 1));

	if (heap->strings == NULL)
		return NT_STATUS_NO_MEMORY;

	heap->strings[heap->num_strings] = str;
	heap->num_strings += 1;

	return NT_STATUS_OK;
}

#define NDR_OK(call) do { result = call; \
			     if (NT_STATUS_EQUAL(result, NT_STATUS_BUFFER_TOO_SMALL)) \
				goto buffer_overflow; \
                             if (!NT_STATUS_IS_OK(result)) \
				goto done; \
                        } while (0)

static NTSTATUS _rap_netshareenum(struct smbsrv_request *req,
				  struct rap_call *call)
{
	struct rap_NetShareEnum r;
	NTSTATUS result;

	NDR_OK(rap_srv_pull_word(call, &r.in.level));
	NDR_OK(rap_srv_pull_bufsize(call, &r.in.bufsize));
	NDR_OK(rap_srv_pull_expect_multiple(call));

	switch(r.in.level) {
	case 0:
		if (strcmp(call->datadesc, "B13") != 0)
			return NT_STATUS_INVALID_PARAMETER;
		break;
	case 1:
		if (strcmp(call->datadesc, "B13BWz") != 0)
			return NT_STATUS_INVALID_PARAMETER;
		break;
	default:
		return NT_STATUS_INVALID_PARAMETER;
		break;
	}

	result = rap_netshareenum(req, &r);

	if (!NT_STATUS_IS_OK(result))
		return result;

	for (r.out.count = 0; r.out.count < r.out.available; r.out.count++) {

		int i = r.out.count;
		struct ndr_push_save data_save;
		struct rap_heap_save heap_save;

		ndr_push_save(call->ndr_push_data, &data_save);
		rap_heap_save(call->heap, &heap_save);

		switch(r.in.level) {
		case 0:
			NDR_OK(ndr_push_bytes(call->ndr_push_data,
					      r.out.info[i].info0.name,
					      sizeof(r.out.info[i].info0.name)));
			break;
		case 1:
			NDR_OK(ndr_push_bytes(call->ndr_push_data,
					      r.out.info[i].info1.name,
					      sizeof(r.out.info[i].info1.name)));
			NDR_OK(ndr_push_uint8(call->ndr_push_data,
					      r.out.info[i].info1.pad));
			NDR_OK(ndr_push_uint16(call->ndr_push_data,
					       r.out.info[i].info1.type));

			NDR_OK(rap_push_string(call->ndr_push_data,
					       call->heap,
					       r.out.info[i].info1.comment));

			break;
		}

		if (call->ndr_push_data->offset > call->heap->offset) {

	buffer_overflow:

			ndr_push_restore(call->ndr_push_data, &data_save);
			rap_heap_restore(call->heap, &heap_save);
			break;
		}
	}

	call->status = r.out.status;

	NDR_CHECK(ndr_push_uint16(call->ndr_push_param, r.out.count));
	NDR_CHECK(ndr_push_uint16(call->ndr_push_param, r.out.available));

	result = NT_STATUS_OK;

 done:
	return result;
}

static NTSTATUS _rap_netserverenum2(struct smbsrv_request *req,
				    struct rap_call *call)
{
	struct rap_NetServerEnum2 r;
	NTSTATUS result;

	NDR_OK(rap_srv_pull_word(call, &r.in.level));
	NDR_OK(rap_srv_pull_bufsize(call, &r.in.bufsize));
	NDR_OK(rap_srv_pull_expect_multiple(call));
	NDR_OK(rap_srv_pull_dword(call, &r.in.servertype));
	NDR_OK(rap_srv_pull_string(call, &r.in.domain));

	switch(r.in.level) {
	case 0:
		if (strcmp(call->datadesc, "B16") != 0)
			return NT_STATUS_INVALID_PARAMETER;
		break;
	case 1:
		if (strcmp(call->datadesc, "B16BBDz") != 0)
			return NT_STATUS_INVALID_PARAMETER;
		break;
	default:
		return NT_STATUS_INVALID_PARAMETER;
		break;
	}

	result = rap_netserverenum2(req, &r);

	if (!NT_STATUS_IS_OK(result))
		return result;

	for (r.out.count = 0; r.out.count < r.out.available; r.out.count++) {

		int i = r.out.count;
		struct ndr_push_save data_save;
		struct rap_heap_save heap_save;

		ndr_push_save(call->ndr_push_data, &data_save);
		rap_heap_save(call->heap, &heap_save);

		switch(r.in.level) {
		case 0:
			NDR_OK(ndr_push_bytes(call->ndr_push_data,
					      r.out.info[i].info0.name,
					      sizeof(r.out.info[i].info0.name)));
			break;
		case 1:
			NDR_OK(ndr_push_bytes(call->ndr_push_data,
					      r.out.info[i].info1.name,
					      sizeof(r.out.info[i].info1.name)));
			NDR_OK(ndr_push_uint8(call->ndr_push_data,
					      r.out.info[i].info1.version_major));
			NDR_OK(ndr_push_uint8(call->ndr_push_data,
					      r.out.info[i].info1.version_minor));
			NDR_OK(ndr_push_uint32(call->ndr_push_data,
					       r.out.info[i].info1.servertype));

			NDR_OK(rap_push_string(call->ndr_push_data,
					       call->heap,
					       r.out.info[i].info1.comment));

			break;
		}

		if (call->ndr_push_data->offset > call->heap->offset) {

	buffer_overflow:

			ndr_push_restore(call->ndr_push_data, &data_save);
			rap_heap_restore(call->heap, &heap_save);
			break;
		}
	}

	call->status = r.out.status;

	NDR_CHECK(ndr_push_uint16(call->ndr_push_param, r.out.count));
	NDR_CHECK(ndr_push_uint16(call->ndr_push_param, r.out.available));

	result = NT_STATUS_OK;

 done:
	return result;
}

static NTSTATUS api_Unsupported(struct smbsrv_request *req,
				struct rap_call *call)
{
	call->status = NERR_notsupported;
	call->convert = 0;
	return NT_STATUS_OK;
}

#define RAP_NetShareEnum 0
#define RAP_NetServerEnum2 104

static const struct
{
	const char *name;
	int id;
	NTSTATUS (*fn)(struct smbsrv_request *req, struct rap_call *call);
} api_commands[] = {
	{"NetShareEnum", RAP_NetShareEnum, _rap_netshareenum },
	{"NetServerEnum2", RAP_NetServerEnum2, _rap_netserverenum2 },
	{NULL, -1, api_Unsupported}
};

NTSTATUS ipc_rap_call(struct smbsrv_request *req, struct smb_trans2 *trans)
{
	int i;
	NTSTATUS result;
	struct rap_call *call;
	DATA_BLOB result_param, result_data;
	struct ndr_push *final_param;
	struct ndr_push *final_data;

	call = new_rap_srv_call(req->mem_ctx, trans);

	if (call == NULL)
		return NT_STATUS_NO_MEMORY;

	NDR_CHECK(ndr_pull_uint16(call->ndr_pull_param, &call->callno));
	NDR_CHECK(ndr_pull_string(call->ndr_pull_param, NDR_SCALARS,
				  &call->paramdesc));
	NDR_CHECK(ndr_pull_string(call->ndr_pull_param, NDR_SCALARS,
				  &call->datadesc));

	call->ndr_push_param = ndr_push_init_ctx(req->mem_ctx);
	call->ndr_push_data = ndr_push_init_ctx(req->mem_ctx);

	if ((call->ndr_push_param == NULL) || (call->ndr_push_data == NULL))
		return NT_STATUS_NO_MEMORY;

	call->ndr_push_param->flags = RAPNDR_FLAGS;
	call->ndr_push_data->flags = RAPNDR_FLAGS;

	result = NT_STATUS_NOT_IMPLEMENTED;

	for (i=0; api_commands[i].name != NULL; i++) {
		if (api_commands[i].id == call->callno) {
			DEBUG(5, ("Running RAP call %s\n",
				  api_commands[i].name));
			result = api_commands[i].fn(req, call);
			break;
		}
	}

	if (!NT_STATUS_IS_OK(result))
		return result;

	result_param = ndr_push_blob(call->ndr_push_param);
	result_data = ndr_push_blob(call->ndr_push_data);

	final_param = ndr_push_init_ctx(req->mem_ctx);
	final_data = ndr_push_init_ctx(req->mem_ctx);

	if ((final_param == NULL) || (final_data == NULL))
		return NT_STATUS_NO_MEMORY;

	final_param->flags = RAPNDR_FLAGS;
	final_data->flags = RAPNDR_FLAGS;

	NDR_CHECK(ndr_push_uint16(final_param, call->status));
	NDR_CHECK(ndr_push_uint16(final_param,
				  call->heap->offset - result_data.length));
	NDR_CHECK(ndr_push_bytes(final_param, result_param.data,
				 result_param.length));

	NDR_CHECK(ndr_push_bytes(final_data, result_data.data,
				 result_data.length));

	for (i=call->heap->num_strings-1; i>=0; i--)
		NDR_CHECK(ndr_push_string(final_data, NDR_SCALARS,
					  call->heap->strings[i]));

	trans->out.setup_count = 0;
	trans->out.setup = NULL;
	trans->out.params = ndr_push_blob(final_param);
	trans->out.data = ndr_push_blob(final_data);

	return result;
}