summaryrefslogtreecommitdiff
path: root/include/linux/tipc.h
blob: ca754f3317f234d8137e7f23f0287e3e7a19884d (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
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
/*
 * include/linux/tipc.h: Include file for TIPC users
 * 
 * Copyright (c) 2003-2005, Ericsson Research Canada
 * Copyright (c) 2005, Wind River Systems
 * Copyright (c) 2005-2006, Ericsson AB
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this 
 * list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, 
 * this list of conditions and the following disclaimer in the documentation 
 * and/or other materials provided with the distribution.
 * Neither the names of the copyright holders nor the names of its 
 * contributors may be used to endorse or promote products derived from this 
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _LINUX_TIPC_H_
#define _LINUX_TIPC_H_

#include <linux/types.h>
#include <linux/string.h>
#include <asm/byteorder.h>

/*
 * TIPC addressing primitives
 */
 
struct tipc_portid {
	__u32 ref;
	__u32 node;
};

struct tipc_name {
	__u32 type;
	__u32 instance;
};

struct tipc_name_seq {
	__u32 type;
	__u32 lower;
	__u32 upper;
};

static inline __u32 tipc_addr(unsigned int zone,
			      unsigned int cluster,
			      unsigned int node)
{
	return(zone << 24) | (cluster << 12) | node;
}

static inline unsigned int tipc_zone(__u32 addr)
{
	return  addr >> 24;
}

static inline unsigned int tipc_cluster(__u32 addr)
{
	return(addr >> 12) & 0xfff;
}

static inline unsigned int tipc_node(__u32 addr)
{
	return  addr & 0xfff;
}

/*
 * Application-accessible port name types
 */

#define TIPC_NET_EVENTS		0	/* network event subscription name type */
#define TIPC_TOP_SRV         	1  	/* topology service name type */
#define TIPC_RESERVED_TYPES	64	/* lowest user-publishable name type */

/* 
 * Publication scopes when binding port names and port name sequences
 */

#define TIPC_ZONE_SCOPE         1
#define TIPC_CLUSTER_SCOPE      2     
#define TIPC_NODE_SCOPE         3

/*
 * Limiting values for messages
 */

#define TIPC_MAX_USER_MSG_SIZE 66000

/* 
 * Message importance levels
 */

#define TIPC_LOW_IMPORTANCE     	0  /* default */
#define TIPC_MEDIUM_IMPORTANCE		1
#define TIPC_HIGH_IMPORTANCE		2
#define TIPC_CRITICAL_IMPORTANCE	3

/* 
 * Msg rejection/connection shutdown reasons
 */

#define TIPC_OK			0
#define TIPC_ERR_NO_NAME	1
#define TIPC_ERR_NO_PORT	2
#define TIPC_ERR_NO_NODE	3
#define TIPC_ERR_OVERLOAD	4
#define TIPC_CONN_SHUTDOWN	5

/*
 * TIPC topology subscription service definitions
 */

#define TIPC_SUB_PORTS     	0x01  	/* filter for port availability */
#define TIPC_SUB_SERVICE     	0x02  	/* filter for service availability */
#if 0
/* The following filter options are not currently implemented */
#define TIPC_SUB_NO_BIND_EVTS	0x04	/* filter out "publish" events */
#define TIPC_SUB_NO_UNBIND_EVTS	0x08	/* filter out "withdraw" events */
#define TIPC_SUB_SINGLE_EVT	0x10	/* expire after first event */
#endif

#define TIPC_WAIT_FOREVER   	~0	/* timeout for permanent subscription */

struct tipc_subscr {
	struct tipc_name_seq seq;	/* name sequence of interest */
	__u32 timeout;			/* subscription duration (in ms) */
        __u32 filter;   		/* bitmask of filter options */
	char usr_handle[8];		/* available for subscriber use */
};


#define TIPC_PUBLISHED          1	/* publication event */
#define TIPC_WITHDRAWN          2	/* withdraw event */
#define TIPC_SUBSCR_TIMEOUT     3	/* subscription timeout event */

struct tipc_event {
	__u32 event;			/* event type */
	__u32 found_lower;		/* matching name seq instances */
	__u32 found_upper;		/*    "      "    "     "      */
        struct tipc_portid port;	/* associated port */
	struct tipc_subscr s;		/* associated subscription */
};

/*
 * Socket API
 */

#ifndef AF_TIPC
#define AF_TIPC		30
#endif

#ifndef PF_TIPC
#define PF_TIPC		AF_TIPC
#endif

#ifndef SOL_TIPC
#define SOL_TIPC	271
#endif

#define TIPC_ADDR_NAMESEQ   	1
#define TIPC_ADDR_MCAST         1
#define TIPC_ADDR_NAME      	2
#define TIPC_ADDR_ID        	3

struct sockaddr_tipc {
	unsigned short family;
	unsigned char  addrtype;
	signed   char  scope;
	union {
		struct tipc_portid id;
		struct tipc_name_seq nameseq;
		struct {
			struct tipc_name name;
			__u32 domain; /* 0: own zone */
		} name;
	} addr;
};

/*
 * Ancillary data objects supported by recvmsg()
 */

#define TIPC_ERRINFO	1	/* error info */
#define TIPC_RETDATA	2	/* returned data */
#define TIPC_DESTNAME	3	/* destination name */

/*
 * TIPC-specific socket option values
 */

#define TIPC_IMPORTANCE		127	/* Default: TIPC_LOW_IMPORTANCE */
#define TIPC_SRC_DROPPABLE	128	/* Default: 0 (resend congested msg) */
#define TIPC_DEST_DROPPABLE	129	/* Default: based on socket type */
#define TIPC_CONN_TIMEOUT     	130	/* Default: 8000 (ms)  */

/*
 * Bearer
 */

/* Identifiers of supported TIPC media types */

#define TIPC_MEDIA_TYPE_ETH	1

/* Maximum sizes of TIPC bearer-related names (including terminating NUL) */ 

#define TIPC_MAX_MEDIA_NAME	16	/* format = media */
#define TIPC_MAX_IF_NAME	16	/* format = interface */
#define TIPC_MAX_BEARER_NAME	32	/* format = media:interface */
#define TIPC_MAX_LINK_NAME	60	/* format = Z.C.N:interface-Z.C.N:interface */

struct tipc_media_addr {
	__u32  type;
	union {
		__u8   eth_addr[6];	/* Ethernet bearer */ 
#if 0
		/* Prototypes for other possible bearer types */

		struct {
			__u16 sin_family;
			__u16 sin_port;
			struct {
				__u32 s_addr;
			} sin_addr;
			char pad[4];
		} addr_in;		/* IP-based bearer */
		__u16  sock_descr;	/* generic socket bearer */
#endif
	} dev_addr;
};


/* Link priority limits (range from 0 to # priorities - 1) */

#define TIPC_NUM_LINK_PRI 32

/* Link tolerance limits (min, default, max), in ms */

#define TIPC_MIN_LINK_TOL 50
#define TIPC_DEF_LINK_TOL 1500
#define TIPC_MAX_LINK_TOL 30000

/* Link window limits (min, default, max), in packets */

#define TIPC_MIN_LINK_WIN 16
#define TIPC_DEF_LINK_WIN 50
#define TIPC_MAX_LINK_WIN 150

/*
 * Configuration
 *
 * All configuration management messaging involves sending a request message
 * to the TIPC configuration service on a node, which sends a reply message
 * back.  (In the future multi-message replies may be supported.)
 *
 * Both request and reply messages consist of a transport header and payload.
 * The transport header contains info about the desired operation;
 * the payload consists of zero or more type/length/value (TLV) items
 * which specify parameters or results for the operation.
 *
 * For many operations, the request and reply messages have a fixed number
 * of TLVs (usually zero or one); however, some reply messages may return 
 * a variable number of TLVs.  A failed request is denoted by the presence
 * of an "error string" TLV in the reply message instead of the TLV(s) the
 * reply should contain if the request succeeds.
 */
 
#define TIPC_CFG_SRV	0		/* configuration service name type */

/* 
 * Public commands:
 * May be issued by any process.
 * Accepted by own node, or by remote node only if remote management enabled.                       
 */
 
#define  TIPC_CMD_NOOP   	    0x0000    /* tx none, rx none */
#define  TIPC_CMD_GET_NODES         0x0001    /* tx net_addr, rx node_info(s) */
#define  TIPC_CMD_GET_MEDIA_NAMES   0x0002    /* tx none, rx media_name(s) */
#define  TIPC_CMD_GET_BEARER_NAMES  0x0003    /* tx none, rx bearer_name(s) */
#define  TIPC_CMD_GET_LINKS         0x0004    /* tx net_addr, rx link_info(s) */
#define  TIPC_CMD_SHOW_NAME_TABLE   0x0005    /* tx name_tbl_query, rx ultra_string */
#define  TIPC_CMD_SHOW_PORTS        0x0006    /* tx none, rx ultra_string */
#define  TIPC_CMD_SHOW_LINK_STATS   0x000B    /* tx link_name, rx ultra_string */

#if 0
#define  TIPC_CMD_SHOW_PORT_STATS   0x0008    /* tx port_ref, rx ultra_string */
#define  TIPC_CMD_RESET_PORT_STATS  0x0009    /* tx port_ref, rx none */
#define  TIPC_CMD_GET_ROUTES        0x000A    /* tx ?, rx ? */
#define  TIPC_CMD_GET_LINK_PEER     0x000D    /* tx link_name, rx ? */
#endif

/* 
 * Protected commands:
 * May only be issued by "network administration capable" process.
 * Accepted by own node, or by remote node only if remote management enabled
 * and this node is zone manager.                       
 */

#define  TIPC_CMD_GET_REMOTE_MNG    0x4003    /* tx none, rx unsigned */
#define  TIPC_CMD_GET_MAX_PORTS     0x4004    /* tx none, rx unsigned */
#define  TIPC_CMD_GET_MAX_PUBL      0x4005    /* tx none, rx unsigned */
#define  TIPC_CMD_GET_MAX_SUBSCR    0x4006    /* tx none, rx unsigned */
#define  TIPC_CMD_GET_MAX_ZONES     0x4007    /* tx none, rx unsigned */
#define  TIPC_CMD_GET_MAX_CLUSTERS  0x4008    /* tx none, rx unsigned */
#define  TIPC_CMD_GET_MAX_NODES     0x4009    /* tx none, rx unsigned */
#define  TIPC_CMD_GET_MAX_SLAVES    0x400A    /* tx none, rx unsigned */
#define  TIPC_CMD_GET_NETID         0x400B    /* tx none, rx unsigned */

#define  TIPC_CMD_ENABLE_BEARER     0x4101    /* tx bearer_config, rx none */
#define  TIPC_CMD_DISABLE_BEARER    0x4102    /* tx bearer_name, rx none */
#define  TIPC_CMD_SET_LINK_TOL      0x4107    /* tx link_config, rx none */
#define  TIPC_CMD_SET_LINK_PRI      0x4108    /* tx link_config, rx none */
#define  TIPC_CMD_SET_LINK_WINDOW   0x4109    /* tx link_config, rx none */
#define  TIPC_CMD_SET_LOG_SIZE      0x410A    /* tx unsigned, rx none */
#define  TIPC_CMD_DUMP_LOG          0x410B    /* tx none, rx ultra_string */
#define  TIPC_CMD_RESET_LINK_STATS  0x410C    /* tx link_name, rx none */

#if 0
#define  TIPC_CMD_CREATE_LINK       0x4103    /* tx link_create, rx none */
#define  TIPC_CMD_REMOVE_LINK       0x4104    /* tx link_name, rx none */
#define  TIPC_CMD_BLOCK_LINK        0x4105    /* tx link_name, rx none */
#define  TIPC_CMD_UNBLOCK_LINK      0x4106    /* tx link_name, rx none */
#endif

/* 
 * Private commands:
 * May only be issued by "network administration capable" process.
 * Accepted by own node only; cannot be used on a remote node.                       
 */

#define  TIPC_CMD_SET_NODE_ADDR     0x8001    /* tx net_addr, rx none */
#if 0
#define  TIPC_CMD_SET_ZONE_MASTER   0x8002    /* tx none, rx none */
#endif
#define  TIPC_CMD_SET_REMOTE_MNG    0x8003    /* tx unsigned, rx none */
#define  TIPC_CMD_SET_MAX_PORTS     0x8004    /* tx unsigned, rx none */
#define  TIPC_CMD_SET_MAX_PUBL      0x8005    /* tx unsigned, rx none */
#define  TIPC_CMD_SET_MAX_SUBSCR    0x8006    /* tx unsigned, rx none */
#define  TIPC_CMD_SET_MAX_ZONES     0x8007    /* tx unsigned, rx none */
#define  TIPC_CMD_SET_MAX_CLUSTERS  0x8008    /* tx unsigned, rx none */
#define  TIPC_CMD_SET_MAX_NODES     0x8009    /* tx unsigned, rx none */
#define  TIPC_CMD_SET_MAX_SLAVES    0x800A    /* tx unsigned, rx none */
#define  TIPC_CMD_SET_NETID         0x800B    /* tx unsigned, rx none */

/*
 * TLV types defined for TIPC
 */

#define TIPC_TLV_NONE		0	/* no TLV present */
#define TIPC_TLV_VOID		1	/* empty TLV (0 data bytes)*/
#define TIPC_TLV_UNSIGNED	2	/* 32-bit integer */
#define TIPC_TLV_STRING		3	/* char[128] (max) */
#define TIPC_TLV_LARGE_STRING	4	/* char[2048] (max) */
#define TIPC_TLV_ULTRA_STRING	5	/* char[32768] (max) */

#define TIPC_TLV_ERROR_STRING	16	/* char[128] containing "error code" */
#define TIPC_TLV_NET_ADDR   	17	/* 32-bit integer denoting <Z.C.N> */
#define TIPC_TLV_MEDIA_NAME	18	/* char[MAX_MEDIA_NAME] */
#define TIPC_TLV_BEARER_NAME	19	/* char[MAX_BEARER_NAME] */
#define TIPC_TLV_LINK_NAME	20	/* char[MAX_LINK_NAME] */
#define TIPC_TLV_NODE_INFO	21	/* struct tipc_node_info */
#define TIPC_TLV_LINK_INFO	22	/* struct tipc_link_info */
#define TIPC_TLV_BEARER_CONFIG  23	/* struct tipc_bearer_config */
#define TIPC_TLV_LINK_CONFIG    24	/* struct tipc_link_config */
#define TIPC_TLV_NAME_TBL_QUERY	25	/* struct tipc_name_table_query */
#define TIPC_TLV_PORT_REF   	26	/* 32-bit port reference */

struct tipc_node_info {
	__u32 addr;			/* network address of node */
	__u32 up;			/* 0=down, 1= up */
};

struct tipc_link_info {
	__u32 dest;			/* network address of peer node */
	__u32 up;			/* 0=down, 1=up */
	char str[TIPC_MAX_LINK_NAME];	/* link name */
};

struct tipc_bearer_config {
	__u32 priority;			/* Range [1,31]. Override per link  */
	__u32 detect_scope;     
	char name[TIPC_MAX_BEARER_NAME];
};

struct tipc_link_config {
	__u32 value;
	char name[TIPC_MAX_LINK_NAME];
};

#define TIPC_NTQ_ALLTYPES 0x80000000

struct tipc_name_table_query {
	__u32 depth;	/* 1:type, 2:+name info, 3:+port info, 4+:+debug info */
	__u32 type;	/* {t,l,u} info ignored if high bit of "depth" is set */
	__u32 lowbound; /* (i.e. displays all entries of name table) */
	__u32 upbound;
};

/*
 * The error string TLV is a null-terminated string describing the cause 
 * of the request failure.  To simplify error processing (and to save space)
 * the first character of the string can be a special error code character
 * (lying by the range 0x80 to 0xFF) which represents a pre-defined reason.
 */

#define TIPC_CFG_TLV_ERROR      "\x80"  /* request contains incorrect TLV(s) */
#define TIPC_CFG_NOT_NET_ADMIN  "\x81"	/* must be network administrator */
#define TIPC_CFG_NOT_ZONE_MSTR	"\x82"	/* must be zone master */
#define TIPC_CFG_NO_REMOTE	"\x83"	/* remote management not enabled */
#define TIPC_CFG_NOT_SUPPORTED  "\x84"	/* request is not supported by TIPC */
#define TIPC_CFG_INVALID_VALUE  "\x85"  /* request has invalid argument value */

#if 0
/* prototypes TLV structures for proposed commands */
struct tipc_link_create {
	__u32   domain;
	struct tipc_media_addr peer_addr;
	char bearer_name[MAX_BEARER_NAME];
};

struct tipc_route_info {
	__u32 dest;
	__u32 router;
};
#endif

/*
 * A TLV consists of a descriptor, followed by the TLV value.
 * TLV descriptor fields are stored in network byte order; 
 * TLV values must also be stored in network byte order (where applicable).
 * TLV descriptors must be aligned to addresses which are multiple of 4,
 * so up to 3 bytes of padding may exist at the end of the TLV value area.
 * There must not be any padding between the TLV descriptor and its value.
 */

struct tlv_desc {
	__u16 tlv_len;		/* TLV length (descriptor + value) */
	__u16 tlv_type;		/* TLV identifier */
};

#define TLV_ALIGNTO 4

#define TLV_ALIGN(datalen) (((datalen)+(TLV_ALIGNTO-1)) & ~(TLV_ALIGNTO-1))
#define TLV_LENGTH(datalen) (sizeof(struct tlv_desc) + (datalen))
#define TLV_SPACE(datalen) (TLV_ALIGN(TLV_LENGTH(datalen)))
#define TLV_DATA(tlv) ((void *)((char *)(tlv) + TLV_LENGTH(0)))

static inline int TLV_OK(const void *tlv, __u16 space)
{
	/*
	 * Would also like to check that "tlv" is a multiple of 4,
	 * but don't know how to do this in a portable way.
	 * - Tried doing (!(tlv & (TLV_ALIGNTO-1))), but GCC compiler
	 *   won't allow binary "&" with a pointer.
	 * - Tried casting "tlv" to integer type, but causes warning about size
	 *   mismatch when pointer is bigger than chosen type (int, long, ...).
	 */

	return (space >= TLV_SPACE(0)) &&
		(ntohs(((struct tlv_desc *)tlv)->tlv_len) <= space);
}

static inline int TLV_CHECK(const void *tlv, __u16 space, __u16 exp_type)
{
	return TLV_OK(tlv, space) && 
		(ntohs(((struct tlv_desc *)tlv)->tlv_type) == exp_type);
}

static inline int TLV_SET(void *tlv, __u16 type, void *data, __u16 len)
{
	struct tlv_desc *tlv_ptr;
	int tlv_len;

	tlv_len = TLV_LENGTH(len);
	tlv_ptr = (struct tlv_desc *)tlv;
	tlv_ptr->tlv_type = htons(type);
	tlv_ptr->tlv_len  = htons(tlv_len);
	if (len && data)
		memcpy(TLV_DATA(tlv_ptr), data, tlv_len);
	return TLV_SPACE(len);
}

/*
 * A TLV list descriptor simplifies processing of messages 
 * containing multiple TLVs.
 */

struct tlv_list_desc {
	struct tlv_desc *tlv_ptr;	/* ptr to current TLV */
	__u32 tlv_space;		/* # bytes from curr TLV to list end */
};

static inline void TLV_LIST_INIT(struct tlv_list_desc *list, 
				 void *data, __u32 space)
{
	list->tlv_ptr = (struct tlv_desc *)data;
	list->tlv_space = space;
}
	     
static inline int TLV_LIST_EMPTY(struct tlv_list_desc *list)
{ 
	return (list->tlv_space == 0);
}

static inline int TLV_LIST_CHECK(struct tlv_list_desc *list, __u16 exp_type)
{
	return TLV_CHECK(list->tlv_ptr, list->tlv_space, exp_type);
}

static inline void *TLV_LIST_DATA(struct tlv_list_desc *list)
{
	return TLV_DATA(list->tlv_ptr);
}

static inline void TLV_LIST_STEP(struct tlv_list_desc *list)
{
	__u16 tlv_space = TLV_ALIGN(ntohs(list->tlv_ptr->tlv_len));

        list->tlv_ptr = (struct tlv_desc *)((char *)list->tlv_ptr + tlv_space);
	list->tlv_space -= tlv_space;
}

/*
 * Configuration messages exchanged via NETLINK_GENERIC use the following
 * family id, name, version and command.
 */
#define TIPC_GENL_FAMILY	0x222
#define TIPC_GENL_NAME		"TIPC"
#define TIPC_GENL_VERSION	0x1
#define TIPC_GENL_CMD		0x1

/*
 * TIPC specific header used in NETLINK_GENERIC requests.
 */
struct tipc_genlmsghdr {
	__u32 dest;		/* Destination address */
	__u16 cmd;		/* Command */
	__u16 reserved;		/* Unused */
};

#define TIPC_GENL_HDRLEN	NLMSG_ALIGN(sizeof(struct tipc_genlmsghdr))

/*
 * Configuration messages exchanged via TIPC sockets use the TIPC configuration 
 * message header, which is defined below.  This structure is analogous 
 * to the Netlink message header, but fields are stored in network byte order 
 * and no padding is permitted between the header and the message data 
 * that follows.
 */

struct tipc_cfg_msg_hdr
{
	__u32 tcm_len;		/* Message length (including header) */
	__u16 tcm_type;		/* Command type */
	__u16 tcm_flags;	/* Additional flags */
	char  tcm_reserved[8];	/* Unused */
};

#define TCM_F_REQUEST	0x1	/* Flag: Request message */
#define TCM_F_MORE	0x2	/* Flag: Message to be continued */

#define TCM_ALIGN(datalen)  (((datalen)+3) & ~3)
#define TCM_LENGTH(datalen) (sizeof(struct tipc_cfg_msg_hdr) + datalen)
#define TCM_SPACE(datalen)  (TCM_ALIGN(TCM_LENGTH(datalen)))
#define TCM_DATA(tcm_hdr)   ((void *)((char *)(tcm_hdr) + TCM_LENGTH(0)))

static inline int TCM_SET(void *msg, __u16 cmd, __u16 flags,
			  void *data, __u16 data_len)
{
	struct tipc_cfg_msg_hdr *tcm_hdr;
	int msg_len;

	msg_len = TCM_LENGTH(data_len);
	tcm_hdr = (struct tipc_cfg_msg_hdr *)msg;
	tcm_hdr->tcm_len   = htonl(msg_len);
	tcm_hdr->tcm_type  = htons(cmd);
	tcm_hdr->tcm_flags = htons(flags);
	if (data_len && data)
		memcpy(TCM_DATA(msg), data, data_len);
	return TCM_SPACE(data_len);
}

#endif