xref: /illumos-gate/usr/src/lib/libmlrpc/common/libmlrpc.h (revision 8a2b682e57a046b828f37bcde1776f131ef4629f)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
23  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
24  */
25 
26 #ifndef	_LIBMLRPC_H
27 #define	_LIBMLRPC_H
28 
29 #include <sys/types.h>
30 #include <sys/uio.h>
31 
32 #include <smb/wintypes.h>
33 #include <libmlrpc/ndr.h>
34 
35 #ifdef	__cplusplus
36 extern "C" {
37 #endif
38 
39 /*
40  * An MSRPC compatible implementation of OSF DCE RPC.  DCE RPC is derived
41  * from the Apollo Network Computing Architecture (NCA) RPC implementation.
42  *
43  * CAE Specification (1997)
44  * DCE 1.1: Remote Procedure Call
45  * Document Number: C706
46  * The Open Group
47  * ogspecs@opengroup.org
48  *
49  * This implementation is based on the DCE Remote Procedure Call spec with
50  * enhancements to support Unicode strings.  The diagram below shows the
51  * DCE RPC layers compared against ONC SUN RPC.
52  *
53  *	NDR RPC Layers		Sun RPC Layers		Remark
54  *	+---------------+	+---------------+	+---------------+
55  *	+---------------+	+---------------+
56  *	| Application	|	| Application	|	The application
57  *	+---------------+	+---------------+
58  *	| Hand coded    |	| RPCGEN gen'd  |	Where the real
59  *	| client/server |	| client/server |	work happens
60  *	| srvsvc.ndl	|	| *_svc.c *_clnt|
61  *	| srvsvc.c	|	|               |
62  *	+---------------+	+---------------+
63  *	| RPC Library	|	| RPC Library   |	Calls/Return
64  *	| ndr_*.c       |	|               |	Binding/PMAP
65  *	+---------------+	+---------------+
66  *	| RPC Protocol	|	| RPC Protocol  |	Headers, Auth,
67  *	| rpcpdu.ndl    |	|               |
68  *	+---------------+	+---------------+
69  *	| IDL gen'd	|	| RPCGEN gen'd  |	Aggregate
70  *	| NDR stubs	|	| XDR stubs     |	Composition
71  *	| *__ndr.c      |	| *_xdr.c       |
72  *	+---------------+	+---------------+
73  *	| NDR Represen	|	| XDR Represen  |	Byte order, padding
74  *	+---------------+	+---------------+
75  *	| Packet Heaps  |	| Network Conn  |	DCERPC does not talk
76  *	| ndo_*.c       |	| clnt_{tcp,udp}|	directly to network.
77  *	+---------------+	+---------------+
78  *
79  * There are two major differences between the DCE RPC and ONC RPC:
80  *
81  * 1. NDR RPC only generates or processes packets from buffers.  Other
82  *    layers must take care of packet transmission and reception.
83  *    The packet heaps are managed through a simple interface provided
84  *    by the Network Data Representation (NDR) module called ndr_stream_t.
85  *    ndo_*.c modules implement the different flavors (operations) of
86  *    packet heaps.
87  *
88  *    ONC RPC communicates directly with the network.  You have to do
89  *    something special for the RPC packet to be placed in a buffer
90  *    rather than sent to the wire.
91  *
92  * 2. NDR RPC uses application provided heaps to support operations.
93  *    A heap is a single, monolithic chunk of memory that NDR RPC manages
94  *    as it allocates.  When the operation and its result are done, the
95  *    heap is disposed of as a single item.  The transaction, which
96  *    is the anchor of most operations, contains the necessary book-
97  *    keeping for the heap.
98  *
99  *    ONC RPC uses malloc() liberally throughout its run-time system.
100  *    To free results, ONC RPC supports an XDR_FREE operation that
101  *    traverses data structures freeing memory as it goes, whether
102  *    it was malloc'd or not.
103  */
104 
105 /*
106  * Dispatch Return Code (DRC)
107  *
108  *	0x8000	15:01	Set to indicate a fault, clear indicates status
109  *	0x7F00	08:07	Status/Fault specific
110  *	0x00FF	00:08	PTYPE_... of PDU, 0xFF for header
111  */
112 #define	NDR_DRC_OK				0x0000
113 #define	NDR_DRC_MASK_FAULT			0x8000
114 #define	NDR_DRC_MASK_SPECIFIER			0xFF00
115 #define	NDR_DRC_MASK_PTYPE			0x00FF
116 
117 /* Fake PTYPE DRC discriminators */
118 #define	NDR_DRC_PTYPE_RPCHDR(DRC)		((DRC) | 0x00FF)
119 #define	NDR_DRC_PTYPE_API(DRC)			((DRC) | 0x00AA)
120 
121 /* DRC Recognizers */
122 #define	NDR_DRC_IS_OK(DRC)	(((DRC) & NDR_DRC_MASK_SPECIFIER) == 0)
123 #define	NDR_DRC_IS_FAULT(DRC)	(((DRC) & NDR_DRC_MASK_FAULT) != 0)
124 
125 /*
126  * (Un)Marshalling category specifiers
127  */
128 #define	NDR_DRC_FAULT_MODE_MISMATCH		0x8100
129 #define	NDR_DRC_RECEIVED			0x0200
130 #define	NDR_DRC_FAULT_RECEIVED_RUNT		0x8300
131 #define	NDR_DRC_FAULT_RECEIVED_MALFORMED	0x8400
132 #define	NDR_DRC_DECODED				0x0500
133 #define	NDR_DRC_FAULT_DECODE_FAILED		0x8600
134 #define	NDR_DRC_ENCODED				0x0700
135 #define	NDR_DRC_FAULT_ENCODE_FAILED		0x8800
136 #define	NDR_DRC_FAULT_ENCODE_TOO_BIG		0x8900
137 #define	NDR_DRC_SENT				0x0A00
138 #define	NDR_DRC_FAULT_SEND_FAILED		0x8B00
139 
140 /*
141  * Resource category specifier
142  */
143 #define	NDR_DRC_FAULT_RESOURCE_1		0x9100
144 #define	NDR_DRC_FAULT_RESOURCE_2		0x9200
145 
146 /*
147  * Parameters. Usually #define'd with useful alias
148  */
149 #define	NDR_DRC_FAULT_PARAM_0_INVALID		0xC000
150 #define	NDR_DRC_FAULT_PARAM_0_UNIMPLEMENTED	0xD000
151 #define	NDR_DRC_FAULT_PARAM_1_INVALID		0xC100
152 #define	NDR_DRC_FAULT_PARAM_1_UNIMPLEMENTED	0xD100
153 #define	NDR_DRC_FAULT_PARAM_2_INVALID		0xC200
154 #define	NDR_DRC_FAULT_PARAM_2_UNIMPLEMENTED	0xD200
155 #define	NDR_DRC_FAULT_PARAM_3_INVALID		0xC300
156 #define	NDR_DRC_FAULT_PARAM_3_UNIMPLEMENTED	0xD300
157 
158 #define	NDR_DRC_FAULT_OUT_OF_MEMORY		0xF000
159 
160 /* RPCHDR */
161 #define	NDR_DRC_FAULT_RPCHDR_MODE_MISMATCH	0x81FF
162 #define	NDR_DRC_FAULT_RPCHDR_RECEIVED_RUNT	0x83FF
163 #define	NDR_DRC_FAULT_RPCHDR_DECODE_FAILED	0x86FF
164 #define	NDR_DRC_FAULT_RPCHDR_PTYPE_INVALID	0xC0FF	/* PARAM_0_INVALID */
165 #define	NDR_DRC_FAULT_RPCHDR_PTYPE_UNIMPLEMENTED 0xD0FF	/* PARAM_0_UNIMP */
166 
167 /* Request */
168 #define	NDR_DRC_FAULT_REQUEST_PCONT_INVALID	0xC000	/* PARAM_0_INVALID */
169 #define	NDR_DRC_FAULT_REQUEST_OPNUM_INVALID	0xC100	/* PARAM_1_INVALID */
170 
171 /* Bind */
172 #define	NDR_DRC_BINDING_MADE			0x000B	/* OK */
173 #define	NDR_DRC_FAULT_BIND_PCONT_BUSY		0xC00B	/* PARAM_0_INVALID */
174 #define	NDR_DRC_FAULT_BIND_UNKNOWN_SERVICE	0xC10B	/* PARAM_1_INVALID */
175 #define	NDR_DRC_FAULT_BIND_NO_SLOTS		0x910B	/* RESOURCE_1 */
176 
177 /* API */
178 #define	NDR_DRC_FAULT_API_SERVICE_INVALID	0xC0AA	/* PARAM_0_INVALID */
179 #define	NDR_DRC_FAULT_API_BIND_NO_SLOTS		0x91AA	/* RESOURCE_1 */
180 #define	NDR_DRC_FAULT_API_OPNUM_INVALID		0xC1AA	/* PARAM_1_INVALID */
181 
182 struct ndr_xa;
183 struct ndr_client;
184 
185 typedef struct ndr_stub_table {
186 	int		(*func)(void *, struct ndr_xa *);
187 	unsigned short	opnum;
188 } ndr_stub_table_t;
189 
190 typedef struct ndr_service {
191 	char		*name;
192 	char		*desc;
193 	char		*endpoint;
194 	char		*sec_addr_port;
195 	char		*abstract_syntax_uuid;
196 	int		abstract_syntax_version;
197 	char		*transfer_syntax_uuid;
198 	int		transfer_syntax_version;
199 	unsigned	bind_instance_size;
200 	int		(*bind_req)();
201 	int		(*unbind_and_close)();
202 	int		(*call_stub)(struct ndr_xa *);
203 	ndr_typeinfo_t	*interface_ti;
204 	ndr_stub_table_t *stub_table;
205 } ndr_service_t;
206 
207 /*
208  * The list of bindings is anchored at a connection.  Nothing in the
209  * RPC mechanism allocates them.  Binding elements which have service==0
210  * indicate free elements.  When a connection is instantiated, at least
211  * one free binding entry should also be established.  Something like
212  * this should suffice for most (all) situations:
213  *
214  *	struct connection {
215  *		....
216  *		ndr_binding_t *binding_list_head;
217  *		ndr_binding_t binding_pool[N_BINDING_POOL];
218  *		....
219  *	};
220  *
221  *	init_connection(struct connection *conn) {
222  *		....
223  *		ndr_svc_binding_pool_init(&conn->binding_list_head,
224  *		    conn->binding_pool, N_BINDING_POOL);
225  */
226 typedef struct ndr_binding {
227 	struct ndr_binding 	*next;
228 	ndr_p_context_id_t	p_cont_id;
229 	unsigned char		which_side;
230 	struct ndr_client	*clnt;
231 	ndr_service_t		*service;
232 	void 			*instance_specific;
233 } ndr_binding_t;
234 
235 #define	NDR_BIND_SIDE_CLIENT	1
236 #define	NDR_BIND_SIDE_SERVER	2
237 
238 #define	NDR_BINDING_TO_SPECIFIC(BINDING, TYPE) \
239 	((TYPE *) (BINDING)->instance_specific)
240 
241 /*
242  * The binding list space must be provided by the application library
243  * for use by the underlying RPC library.  We need at least two binding
244  * slots per connection.
245  */
246 #define	NDR_N_BINDING_POOL	2
247 
248 typedef struct ndr_pipe {
249 	void			*np_listener;
250 	const char		*np_endpoint;
251 	struct smb_netuserinfo	*np_user;
252 	int			(*np_send)(struct ndr_pipe *, void *, size_t);
253 	int			(*np_recv)(struct ndr_pipe *, void *, size_t);
254 	int			np_fid;
255 	uint16_t		np_max_xmit_frag;
256 	uint16_t		np_max_recv_frag;
257 	ndr_binding_t		*np_binding;
258 	ndr_binding_t		np_binding_pool[NDR_N_BINDING_POOL];
259 } ndr_pipe_t;
260 
261 /*
262  * Number of bytes required to align SIZE on the next dword/4-byte
263  * boundary.
264  */
265 #define	NDR_ALIGN4(SIZE)	((4 - (SIZE)) & 3);
266 
267 /*
268  * DCE RPC strings (CAE section 14.3.4) are represented as varying or varying
269  * and conformant one-dimensional arrays. Characters can be single-byte
270  * or multi-byte as long as all characters conform to a fixed element size,
271  * i.e. UCS-2 is okay but UTF-8 is not a valid DCE RPC string format. The
272  * string is terminated by a null character of the appropriate element size.
273  *
274  * MSRPC strings should always be varying/conformant and not null terminated.
275  * This format uses the size_is, first_is and length_is attributes (CAE
276  * section 4.2.18).
277  *
278  *	typedef struct string {
279  *		DWORD size_is;
280  *		DWORD first_is;
281  *		DWORD length_is;
282  *		wchar_t string[ANY_SIZE_ARRAY];
283  *	} string_t;
284  *
285  * The size_is attribute is used to specify the number of data elements in
286  * each dimension of an array.
287  *
288  * The first_is attribute is used to define the lower bound for significant
289  * elements in each dimension of an array. For strings this is always 0.
290  *
291  * The length_is attribute is used to define the number of significant
292  * elements in each dimension of an array. For strings this is typically
293  * the same as size_is. Although it might be (size_is - 1) if the string
294  * is null terminated.
295  *
296  *   4 bytes   4 bytes   4 bytes  2bytes 2bytes 2bytes 2bytes
297  * +---------+---------+---------+------+------+------+------+
298  * |size_is  |first_is |length_is| char | char | char | char |
299  * +---------+---------+---------+------+------+------+------+
300  *
301  * Unfortunately, not all MSRPC Unicode strings are null terminated, which
302  * means that the recipient has to manually null-terminate the string after
303  * it has been unmarshalled.  There may be a wide-char pad following a
304  * string, and it may sometimes contains zero, but it's not guaranteed.
305  *
306  * To deal with this, MSRPC sometimes uses an additional wrapper with two
307  * more fields, as shown below.
308  *	length: the array length in bytes excluding terminating null bytes
309  *	maxlen: the array length in bytes including null terminator bytes
310  *	LPTSTR: converted to a string_t by NDR
311  *
312  * typedef struct ms_string {
313  *		WORD length;
314  *		WORD maxlen;
315  *		LPTSTR str;
316  * } ms_string_t;
317  */
318 typedef struct ndr_mstring {
319 	uint16_t length;
320 	uint16_t allosize;
321 	LPTSTR str;
322 } ndr_mstring_t;
323 
324 /*
325  * A number of heap areas are used during marshalling and unmarshalling.
326  * Under some circumstances these areas can be discarded by the library
327  * code, i.e. on the server side before returning to the client and on
328  * completion of a client side bind.  In the case of a client side RPC
329  * call, these areas must be preserved after an RPC returns to give the
330  * caller time to take a copy of the data.  In this case the client must
331  * call ndr_clnt_free_heap to free the memory.
332  *
333  * The heap management data definition looks a bit like this:
334  *
335  * heap -> +---------------+     +------------+
336  *         | iovec[0].base | --> | data block |
337  *         | iovec[0].len  |     +------------+
338  *         +---------------+
339  *                ::
340  *                ::
341  * iov  -> +---------------+     +------------+
342  *         | iovec[n].base | --> | data block |
343  *         | iovec[n].len  |     +------------+
344  *         +---------------+     ^            ^
345  *                               |            |
346  *    next ----------------------+            |
347  *    top  -----------------------------------+
348  *
349  */
350 
351 /*
352  * Setting MAXIOV to 384 will use ((8 * 384) + 16) = 3088 bytes
353  * of the first heap block.
354  */
355 #define	NDR_HEAP_MAXIOV		384
356 #define	NDR_HEAP_BLKSZ		8192
357 
358 typedef struct ndr_heap {
359 	struct iovec iovec[NDR_HEAP_MAXIOV];
360 	struct iovec *iov;
361 	int iovcnt;
362 	char *top;
363 	char *next;
364 } ndr_heap_t;
365 
366 /*
367  * Alternate varying/conformant string definition
368  * - for non-null-terminated strings.
369  */
370 typedef struct ndr_vcs {
371 	/*
372 	 * size_is (actually a copy of length_is) will
373 	 * be inserted here by the marshalling library.
374 	 */
375 	uint32_t vc_first_is;
376 	uint32_t vc_length_is;
377 	uint16_t buffer[ANY_SIZE_ARRAY];
378 } ndr_vcs_t;
379 
380 typedef struct ndr_vcstr {
381 	uint16_t wclen;
382 	uint16_t wcsize;
383 	ndr_vcs_t *vcs;
384 } ndr_vcstr_t;
385 
386 typedef struct ndr_vcb {
387 	/*
388 	 * size_is (actually a copy of length_is) will
389 	 * be inserted here by the marshalling library.
390 	 */
391 	uint32_t vc_first_is;
392 	uint32_t vc_length_is;
393 	uint8_t buffer[ANY_SIZE_ARRAY];
394 } ndr_vcb_t;
395 
396 typedef struct ndr_vcbuf {
397 	uint16_t len;
398 	uint16_t size;
399 	ndr_vcb_t *vcb;
400 } ndr_vcbuf_t;
401 
402 ndr_heap_t *ndr_heap_create(void);
403 void ndr_heap_destroy(ndr_heap_t *);
404 void *ndr_heap_dupmem(ndr_heap_t *, const void *, size_t);
405 void *ndr_heap_malloc(ndr_heap_t *, unsigned);
406 void *ndr_heap_strdup(ndr_heap_t *, const char *);
407 int ndr_heap_mstring(ndr_heap_t *, const char *, ndr_mstring_t *);
408 void ndr_heap_mkvcs(ndr_heap_t *, char *, ndr_vcstr_t *);
409 void ndr_heap_mkvcb(ndr_heap_t *, uint8_t *, uint32_t, ndr_vcbuf_t *);
410 int ndr_heap_used(ndr_heap_t *);
411 int ndr_heap_avail(ndr_heap_t *);
412 
413 #define	NDR_MALLOC(XA, SZ)	ndr_heap_malloc((XA)->heap, SZ)
414 #define	NDR_NEW(XA, T)		ndr_heap_malloc((XA)->heap, sizeof (T))
415 #define	NDR_NEWN(XA, T, N)	ndr_heap_malloc((XA)->heap, sizeof (T)*(N))
416 #define	NDR_STRDUP(XA, S)	ndr_heap_strdup((XA)->heap, (S))
417 #define	NDR_MSTRING(XA, S, OUT)	ndr_heap_mstring((XA)->heap, (S), (OUT))
418 #define	NDR_SIDDUP(XA, S)	ndr_heap_dupmem((XA)->heap, (S), smb_sid_len(S))
419 
420 typedef struct ndr_xa {
421 	unsigned short		ptype;		/* high bits special */
422 	unsigned short		opnum;
423 	ndr_stream_t		recv_nds;
424 	ndr_hdr_t		recv_hdr;
425 	ndr_stream_t		send_nds;
426 	ndr_hdr_t		send_hdr;
427 	ndr_binding_t		*binding;	/* what we're using */
428 	ndr_binding_t		*binding_list;	/* from connection */
429 	ndr_heap_t		*heap;
430 	ndr_pipe_t		*pipe;
431 } ndr_xa_t;
432 
433 /*
434  * 20-byte opaque id used by various RPC services.
435  */
436 CONTEXT_HANDLE(ndr_hdid) ndr_hdid_t;
437 
438 typedef struct ndr_client {
439 	/* transport stuff (xa_* members) */
440 	int (*xa_init)(struct ndr_client *, ndr_xa_t *);
441 	int (*xa_exchange)(struct ndr_client *, ndr_xa_t *);
442 	int (*xa_read)(struct ndr_client *, ndr_xa_t *);
443 	void (*xa_preserve)(struct ndr_client *, ndr_xa_t *);
444 	void (*xa_destruct)(struct ndr_client *, ndr_xa_t *);
445 	void (*xa_release)(struct ndr_client *);
446 	void			*xa_private;
447 	int			xa_fd;
448 
449 	ndr_hdid_t		*handle;
450 	ndr_binding_t		*binding;
451 	ndr_binding_t		*binding_list;
452 	ndr_binding_t		binding_pool[NDR_N_BINDING_POOL];
453 
454 	boolean_t		nonull;
455 	boolean_t		heap_preserved;
456 	ndr_heap_t		*heap;
457 	ndr_stream_t		*recv_nds;
458 	ndr_stream_t		*send_nds;
459 
460 	uint32_t		next_call_id;
461 	unsigned		next_p_cont_id;
462 } ndr_client_t;
463 
464 typedef struct ndr_handle {
465 	ndr_hdid_t		nh_id;
466 	struct ndr_handle	*nh_next;
467 	ndr_pipe_t		*nh_pipe;
468 	const ndr_service_t	*nh_svc;
469 	ndr_client_t		*nh_clnt;
470 	void			*nh_data;
471 	void			(*nh_data_free)(void *);
472 } ndr_handle_t;
473 
474 #define	NDR_PDU_SIZE_HINT_DEFAULT	(16*1024)
475 #define	NDR_BUF_MAGIC			0x4E425546	/* NBUF */
476 
477 typedef struct ndr_buf {
478 	uint32_t		nb_magic;
479 	ndr_stream_t		nb_nds;
480 	ndr_heap_t		*nb_heap;
481 	ndr_typeinfo_t		*nb_ti;
482 } ndr_buf_t;
483 
484 /* ndr_ops.c */
485 int nds_initialize(ndr_stream_t *, unsigned, int, ndr_heap_t *);
486 void nds_destruct(ndr_stream_t *);
487 void nds_show_state(ndr_stream_t *);
488 
489 /* ndr_client.c */
490 int ndr_clnt_bind(ndr_client_t *, ndr_service_t *, ndr_binding_t **);
491 int ndr_clnt_call(ndr_binding_t *, int, void *);
492 void ndr_clnt_free_heap(ndr_client_t *);
493 
494 /* ndr_marshal.c */
495 ndr_buf_t *ndr_buf_init(ndr_typeinfo_t *);
496 void ndr_buf_fini(ndr_buf_t *);
497 int ndr_buf_decode(ndr_buf_t *, unsigned, unsigned, const char *data, size_t,
498     void *);
499 int ndr_decode_call(ndr_xa_t *, void *);
500 int ndr_encode_return(ndr_xa_t *, void *);
501 int ndr_encode_call(ndr_xa_t *, void *);
502 int ndr_decode_return(ndr_xa_t *, void *);
503 int ndr_decode_pdu_hdr(ndr_xa_t *);
504 int ndr_encode_pdu_hdr(ndr_xa_t *);
505 void ndr_decode_frag_hdr(ndr_stream_t *, ndr_common_header_t *);
506 void ndr_remove_frag_hdr(ndr_stream_t *);
507 void ndr_show_hdr(ndr_common_header_t *);
508 unsigned ndr_bind_ack_hdr_size(ndr_xa_t *);
509 unsigned ndr_alter_context_rsp_hdr_size(void);
510 
511 /* ndr_server.c */
512 void ndr_pipe_worker(ndr_pipe_t *);
513 
514 int ndr_generic_call_stub(ndr_xa_t *);
515 
516 /* ndr_svc.c */
517 ndr_stub_table_t *ndr_svc_find_stub(ndr_service_t *, int);
518 ndr_service_t *ndr_svc_lookup_name(const char *);
519 ndr_service_t *ndr_svc_lookup_uuid(ndr_uuid_t *, int, ndr_uuid_t *, int);
520 int ndr_svc_register(ndr_service_t *);
521 void ndr_svc_unregister(ndr_service_t *);
522 void ndr_svc_binding_pool_init(ndr_binding_t **, ndr_binding_t pool[], int);
523 ndr_binding_t *ndr_svc_find_binding(ndr_xa_t *, ndr_p_context_id_t);
524 ndr_binding_t *ndr_svc_new_binding(ndr_xa_t *);
525 
526 int ndr_uuid_parse(char *, ndr_uuid_t *);
527 void ndr_uuid_unparse(ndr_uuid_t *, char *);
528 
529 ndr_hdid_t *ndr_hdalloc(const ndr_xa_t *, const void *);
530 void ndr_hdfree(const ndr_xa_t *, const ndr_hdid_t *);
531 ndr_handle_t *ndr_hdlookup(const ndr_xa_t *, const ndr_hdid_t *);
532 void ndr_hdclose(ndr_pipe_t *);
533 
534 ssize_t ndr_uiomove(caddr_t, size_t, enum uio_rw, struct uio *);
535 
536 /*
537  * An ndr_client_t is created while binding a client connection to hold
538  * the context for calls made using that connection.
539  *
540  * Handles are RPC call specific and we use an inheritance mechanism to
541  * ensure that each handle has a pointer to the client_t.  When the top
542  * level (bind) handle is released, we close the connection.
543  *
544  * There are some places in libmlsvc where the code assumes that the
545  * handle member is first in this struct.  careful
546  */
547 typedef struct mlrpc_handle {
548 	ndr_hdid_t	handle;		/* keep first */
549 	ndr_client_t	*clnt;
550 } mlrpc_handle_t;
551 
552 int mlrpc_clh_create(mlrpc_handle_t *, void *);
553 uint32_t mlrpc_clh_bind(mlrpc_handle_t *, ndr_service_t *);
554 void mlrpc_clh_unbind(mlrpc_handle_t *);
555 void *mlrpc_clh_free(mlrpc_handle_t *);
556 
557 int ndr_rpc_call(mlrpc_handle_t *, int, void *);
558 int ndr_rpc_get_ssnkey(mlrpc_handle_t *, unsigned char *, size_t);
559 void *ndr_rpc_malloc(mlrpc_handle_t *, size_t);
560 ndr_heap_t *ndr_rpc_get_heap(mlrpc_handle_t *);
561 void ndr_rpc_release(mlrpc_handle_t *);
562 void ndr_rpc_set_nonull(mlrpc_handle_t *);
563 
564 boolean_t ndr_is_null_handle(mlrpc_handle_t *);
565 boolean_t ndr_is_bind_handle(mlrpc_handle_t *);
566 void ndr_inherit_handle(mlrpc_handle_t *, mlrpc_handle_t *);
567 
568 #ifdef	__cplusplus
569 }
570 #endif
571 
572 #endif	/* _LIBMLRPC_H */
573