summaryrefslogtreecommitdiff
path: root/source4/scripting/ejs/smbcalls_rpc.c
blob: 6aef216ca48dc5f447dee66c1c2239a760b515a0 (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
/* 
   Unix SMB/CIFS implementation.

   provide interfaces to rpc calls from ejs scripts

   Copyright (C) Andrew Tridgell 2005
   
   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"
#include "scripting/ejs/smbcalls.h"
#include "lib/ejs/ejs.h"
#include "librpc/gen_ndr/ndr_echo.h"
#include "lib/cmdline/popt_common.h"
#include "lib/messaging/irpc.h"
#include "scripting/ejs/ejsrpc.h"
#include "dlinklist.h"

/*
  state of a irpc 'connection'
*/
struct ejs_irpc_connection {
	const char *server_name;
	uint32_t *dest_ids;
	struct messaging_context *msg_ctx;
};

/*
  messaging clients need server IDs as well ...
 */
#define EJS_ID_BASE 0x30000000

/*
  setup a context for talking to a irpc server
     example: 
        var conn = new Object();
        status = irpc_connect(conn, "smb_server");
*/
static int ejs_irpc_connect(MprVarHandle eid, int argc, struct MprVar **argv)
{
	NTSTATUS status;
	int i;
	struct MprVar *conn;
	struct event_context *ev;
	struct ejs_irpc_connection *p;

	/* validate arguments */
	if (argc != 2 ||
	    argv[0]->type != MPR_TYPE_OBJECT ||
	    argv[1]->type != MPR_TYPE_STRING) {
		ejsSetErrorMsg(eid, "rpc_connect invalid arguments");
		return -1;
	}

	conn           = argv[0];

	p = talloc(conn, struct ejs_irpc_connection);
	if (p == NULL) {
		return -1;
	}

	p->server_name = mprToString(argv[1]);

	ev = talloc_find_parent_bytype(mprMemCtx(), struct event_context);

	/* create a messaging context, looping as we have no way to
	   allocate temporary server ids automatically */
	for (i=0;i<10000;i++) {
		p->msg_ctx = messaging_init(p, EJS_ID_BASE + i, ev);
		if (p->msg_ctx) break;
	}
	if (p->msg_ctx == NULL) {
		ejsSetErrorMsg(eid, "irpc_connect unable to create a messaging context");
		talloc_free(p);
		return -1;
	}

	p->dest_ids = irpc_servers_byname(p->msg_ctx, p->server_name);
	if (p->dest_ids == NULL || p->dest_ids[0] == 0) {
		talloc_free(p);
		status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
	} else {
		mprSetPtrChild(conn, "irpc", p);
		status = NT_STATUS_OK;
	}

	mpr_Return(eid, mprNTSTATUS(status));
	return 0;
}


/*
  connect to an rpc server
     example: 
        var conn = new Object();
        status = rpc_connect(conn, "ncacn_ip_tcp:localhost", "rpcecho");
*/
static int ejs_rpc_connect(MprVarHandle eid, int argc, struct MprVar **argv)
{
	const char *binding, *pipe_name;
	const struct dcerpc_interface_table *iface;
	NTSTATUS status;
	struct dcerpc_pipe *p;
	struct MprVar *conn;
	struct cli_credentials *creds = cmdline_credentials;
	struct event_context *ev;

	/* validate arguments */
	if (argc != 3 ||
	    argv[0]->type != MPR_TYPE_OBJECT ||
	    argv[1]->type != MPR_TYPE_STRING ||
	    argv[2]->type != MPR_TYPE_STRING) {
		ejsSetErrorMsg(eid, "rpc_connect invalid arguments");
		return -1;
	}

	conn       = argv[0];
	binding    = mprToString(argv[1]);
	pipe_name  = mprToString(argv[2]);

	iface = idl_iface_by_name(pipe_name);
	if (iface == NULL) {
		status = NT_STATUS_OBJECT_NAME_INVALID;
		goto done;
	}

	if (creds == NULL) {
		creds = cli_credentials_init(mprMemCtx());
		cli_credentials_guess(creds);
		cli_credentials_set_username(creds, "", CRED_GUESSED);
		cli_credentials_set_password(creds, "", CRED_GUESSED);
	}

	ev = talloc_find_parent_bytype(mprMemCtx(), struct event_context);

	status = dcerpc_pipe_connect(conn, &p, binding, 
				     iface->uuid, iface->if_version, 
				     creds, ev);
	if (!NT_STATUS_IS_OK(status)) goto done;

	/* callers don't allocate ref vars in the ejs interface */
	p->conn->flags |= DCERPC_NDR_REF_ALLOC;

	/* by making the pipe a child of the connection variable, it will
	   auto close when it goes out of scope in the script */
	mprSetPtrChild(conn, "pipe", p);
	mprSetPtr(conn, "iface", iface);

done:
	mpr_Return(eid, mprNTSTATUS(status));
	return 0;
}


/*
  make an irpc call - called via the same interface as rpc
*/
static int ejs_irpc_call(int eid, struct MprVar *conn, struct MprVar *io, 
			 const struct dcerpc_interface_table *iface, int callnum,
			 ejs_pull_function_t ejs_pull, ejs_push_function_t ejs_push)
{
	NTSTATUS status;
	void *ptr;
	struct ejs_rpc *ejs;
	const struct dcerpc_interface_call *call;
	struct ejs_irpc_connection *p;
	struct irpc_request **reqs;
	int i, count;
	struct MprVar *results;

	p = mprGetPtr(conn, "irpc");

	ejs = talloc(mprMemCtx(), struct ejs_rpc);
	if (ejs == NULL) {
		status = NT_STATUS_NO_MEMORY;
		goto done;
	}

	call = &iface->calls[callnum];

	ejs->eid = eid;
	ejs->callname = call->name;

	/* allocate the C structure */
	ptr = talloc_zero_size(ejs, call->struct_size);
	if (ptr == NULL) {
		status = NT_STATUS_NO_MEMORY;
		goto done;
	}

	/* convert the mpr object into a C structure */
	status = ejs_pull(ejs, io, ptr);
	if (!NT_STATUS_IS_OK(status)) {
		goto done;
	}

	for (count=0;p->dest_ids[count];count++) /* noop */ ;

	/* we need to make a call per server */
	reqs = talloc_array(ejs, struct irpc_request *, count);
	if (reqs == NULL) {
		status = NT_STATUS_NO_MEMORY;
		goto done;
	}

	/* make the actual calls */
	for (i=0;i<count;i++) {
		reqs[i] = irpc_call_send(p->msg_ctx, p->dest_ids[i], 
					 iface, callnum, ptr);
		if (reqs[i] == NULL) {
			status = NT_STATUS_NO_MEMORY;
			goto done;
		}
		talloc_steal(reqs, reqs[i]);
	}
	
	mprSetVar(io, "results", mprObject("results"));
	results = mprGetProperty(io, "results", NULL);

	/* and receive the results, placing them in io.results[i] */
	for (i=0;i<count;i++) {
		struct MprVar *output;

		status = irpc_call_recv(reqs[i]);
		if (!NT_STATUS_IS_OK(status)) {
			goto done;
		}
		status = ejs_push(ejs, io, ptr);
		if (!NT_STATUS_IS_OK(status)) {
			goto done;
		}
		talloc_free(reqs[i]);

		/* add to the results array */
		output = mprGetProperty(io, "output", NULL);
		if (output) {
			char idx[16];
			mprItoa(i, idx, sizeof(idx));
			mprSetProperty(results, idx, output);
			mprDeleteProperty(io, "output");
		}
	}
	mprSetVar(results, "length", mprCreateIntegerVar(i));

done:
	talloc_free(ejs);
	mpr_Return(eid, mprNTSTATUS(status));
	if (NT_STATUS_EQUAL(status, NT_STATUS_INTERNAL_ERROR)) {
		return -1;
	}
	return 0;
}


/*
  backend code for making an rpc call - this is called from the pidl generated ejs
  code
*/
 int ejs_rpc_call(int eid, int argc, struct MprVar **argv,
		  const struct dcerpc_interface_table *iface, int callnum,
		  ejs_pull_function_t ejs_pull, ejs_push_function_t ejs_push)
{
	struct MprVar *conn, *io;
	struct dcerpc_pipe *p;
	NTSTATUS status;
	void *ptr;
	struct rpc_request *req;
	struct ejs_rpc *ejs;
	const struct dcerpc_interface_call *call;

	if (argc != 2 ||
	    argv[0]->type != MPR_TYPE_OBJECT ||
	    argv[1]->type != MPR_TYPE_OBJECT) {
		ejsSetErrorMsg(eid, "rpc_call invalid arguments");
		return -1;
	}
	    
	conn     = argv[0];
	io       = argv[1];

	if (mprGetPtr(conn, "irpc")) {
		/* its an irpc call */
		return ejs_irpc_call(eid, conn, io, iface, callnum, ejs_pull, ejs_push);
	}

	/* get the pipe info */
	p = mprGetPtr(conn, "pipe");
	if (p == NULL) {
		ejsSetErrorMsg(eid, "rpc_call invalid pipe");
		return -1;
	}

	ejs = talloc(mprMemCtx(), struct ejs_rpc);
	if (ejs == NULL) {
		status = NT_STATUS_NO_MEMORY;
		goto done;
	}

	call = &iface->calls[callnum];

	ejs->eid = eid;
	ejs->callname = call->name;

	/* allocate the C structure */
	ptr = talloc_zero_size(ejs, call->struct_size);
	if (ptr == NULL) {
		status = NT_STATUS_NO_MEMORY;
		goto done;
	}

	/* convert the mpr object into a C structure */
	status = ejs_pull(ejs, io, ptr);
	if (!NT_STATUS_IS_OK(status)) {
		goto done;
	}

	/* if requested, print the structure */
	if (p->conn->flags & DCERPC_DEBUG_PRINT_IN) {
		ndr_print_function_debug(call->ndr_print, call->name, NDR_IN, ptr);
	}

	/* make the actual call */
	req = dcerpc_ndr_request_send(p, NULL, iface, callnum, ptr, ptr);
	if (req == NULL) {
		status = NT_STATUS_NO_MEMORY;
		goto done;
	}
	status = dcerpc_ndr_request_recv(req);

	/* print the 'out' structure, if needed */
	if (p->conn->flags & DCERPC_DEBUG_PRINT_OUT) {
		ndr_print_function_debug(call->ndr_print, call->name, NDR_OUT, ptr);
	}

	status = ejs_push(ejs, io, ptr);

done:
	talloc_free(ejs);
	mpr_Return(eid, mprNTSTATUS(status));
	if (NT_STATUS_EQUAL(status, NT_STATUS_INTERNAL_ERROR)) {
		return -1;
	}
	return 0;
}


/* a list of registered ejs rpc modules */
static struct ejs_register {
	struct ejs_register *next, *prev;
	const char *name;
	ejs_setup_t setup;
	ejs_constants_t constants;
} *ejs_registered;

/*
  register a generated ejs module
*/
 NTSTATUS smbcalls_register_ejs(const char *name, 
				ejs_setup_t setup,
				ejs_constants_t constants)
{
	struct ejs_register *r;
	void *ctx = ejs_registered;
	if (ctx == NULL) {
		ctx = talloc_autofree_context();
	}
	r = talloc(ctx, struct ejs_register);
	NT_STATUS_HAVE_NO_MEMORY(r);
	r->name = name;
	r->setup = setup;
	r->constants = constants;
	DLIST_ADD(ejs_registered, r);
	return NT_STATUS_OK;
}

/*
  setup C functions that be called from ejs
*/
void smb_setup_ejs_rpc(void)
{
	struct ejs_register *r;

	ejsDefineCFunction(-1, "rpc_connect", ejs_rpc_connect, NULL, MPR_VAR_SCRIPT_HANDLE);
	ejsDefineCFunction(-1, "irpc_connect", ejs_irpc_connect, NULL, MPR_VAR_SCRIPT_HANDLE);
	for (r=ejs_registered;r;r=r->next) {
		r->setup();
	}
}

/*
  setup constants for rpc calls
*/
void smb_setup_ejs_rpc_constants(int eid)
{
	struct ejs_register *r;
	struct MprVar v;

	for (r=ejs_registered;r;r=r->next) {
		r->constants(eid);
	}

	v = mprCreatePtrVar(NULL);
	mprSetProperty(ejsGetGlobalObject(eid), "NULL", &v);
}