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1/*
2 * net/tipc/msg.h: Include file for TIPC message header routines
3 *
4 * Copyright (c) 2000-2007, Ericsson AB
5 * Copyright (c) 2005-2008, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#ifndef _TIPC_MSG_H
38#define _TIPC_MSG_H
39
40#include "bearer.h"
41
42#define TIPC_VERSION 2
43
44/*
45 * TIPC user data message header format, version 2:
46 *
47 *
48 * 1 0 9 8 7 6 5 4|3 2 1 0 9 8 7 6|5 4 3 2 1 0 9 8|7 6 5 4 3 2 1 0
49 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
50 * w0:|vers | user |hdr sz |n|d|s|-| message size |
51 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
52 * w1:|mstyp| error |rer cnt|lsc|opt p| broadcast ack no |
53 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
54 * w2:| link level ack no | broadcast/link level seq no |
55 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
56 * w3:| previous node |
57 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
58 * w4:| originating port |
59 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
60 * w5:| destination port |
61 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
62 * w6:| originating node |
63 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
64 * w7:| destination node |
65 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
66 * w8:| name type / transport sequence number |
67 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
68 * w9:| name instance/multicast lower bound |
69 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
70 * wA:| multicast upper bound |
71 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
72 * / /
73 * \ options \
74 * / /
75 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
76 *
77 */
78
79#define TIPC_CONN_MSG 0
80#define TIPC_MCAST_MSG 1
81#define TIPC_NAMED_MSG 2
82#define TIPC_DIRECT_MSG 3
83
84
85#define SHORT_H_SIZE 24 /* Connected, in-cluster messages */
86#define DIR_MSG_H_SIZE 32 /* Directly addressed messages */
87#define LONG_H_SIZE 40 /* Named messages */
88#define MCAST_H_SIZE 44 /* Multicast messages */
89#define INT_H_SIZE 40 /* Internal messages */
90#define MIN_H_SIZE 24 /* Smallest legal TIPC header size */
91#define MAX_H_SIZE 60 /* Largest possible TIPC header size */
92
93#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
94
95
96struct tipc_msg {
97 __be32 hdr[15];
98};
99
100
101static inline u32 msg_word(struct tipc_msg *m, u32 pos)
102{
103 return ntohl(m->hdr[pos]);
104}
105
106static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
107{
108 m->hdr[w] = htonl(val);
109}
110
111static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
112{
113 return (msg_word(m, w) >> pos) & mask;
114}
115
116static inline void msg_set_bits(struct tipc_msg *m, u32 w,
117 u32 pos, u32 mask, u32 val)
118{
119 val = (val & mask) << pos;
120 mask = mask << pos;
121 m->hdr[w] &= ~htonl(mask);
122 m->hdr[w] |= htonl(val);
123}
124
125static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
126{
127 u32 temp = msg->hdr[a];
128
129 msg->hdr[a] = msg->hdr[b];
130 msg->hdr[b] = temp;
131}
132
133/*
134 * Word 0
135 */
136
137static inline u32 msg_version(struct tipc_msg *m)
138{
139 return msg_bits(m, 0, 29, 7);
140}
141
142static inline void msg_set_version(struct tipc_msg *m)
143{
144 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
145}
146
147static inline u32 msg_user(struct tipc_msg *m)
148{
149 return msg_bits(m, 0, 25, 0xf);
150}
151
152static inline u32 msg_isdata(struct tipc_msg *m)
153{
154 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
155}
156
157static inline void msg_set_user(struct tipc_msg *m, u32 n)
158{
159 msg_set_bits(m, 0, 25, 0xf, n);
160}
161
162static inline u32 msg_importance(struct tipc_msg *m)
163{
164 return msg_bits(m, 0, 25, 0xf);
165}
166
167static inline void msg_set_importance(struct tipc_msg *m, u32 i)
168{
169 msg_set_user(m, i);
170}
171
172static inline u32 msg_hdr_sz(struct tipc_msg *m)
173{
174 return msg_bits(m, 0, 21, 0xf) << 2;
175}
176
177static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
178{
179 msg_set_bits(m, 0, 21, 0xf, n>>2);
180}
181
182static inline u32 msg_size(struct tipc_msg *m)
183{
184 return msg_bits(m, 0, 0, 0x1ffff);
185}
186
187static inline u32 msg_data_sz(struct tipc_msg *m)
188{
189 return msg_size(m) - msg_hdr_sz(m);
190}
191
192static inline int msg_non_seq(struct tipc_msg *m)
193{
194 return msg_bits(m, 0, 20, 1);
195}
196
197static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
198{
199 msg_set_bits(m, 0, 20, 1, n);
200}
201
202static inline int msg_dest_droppable(struct tipc_msg *m)
203{
204 return msg_bits(m, 0, 19, 1);
205}
206
207static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
208{
209 msg_set_bits(m, 0, 19, 1, d);
210}
211
212static inline int msg_src_droppable(struct tipc_msg *m)
213{
214 return msg_bits(m, 0, 18, 1);
215}
216
217static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
218{
219 msg_set_bits(m, 0, 18, 1, d);
220}
221
222static inline void msg_set_size(struct tipc_msg *m, u32 sz)
223{
224 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
225}
226
227
228/*
229 * Word 1
230 */
231
232static inline u32 msg_type(struct tipc_msg *m)
233{
234 return msg_bits(m, 1, 29, 0x7);
235}
236
237static inline void msg_set_type(struct tipc_msg *m, u32 n)
238{
239 msg_set_bits(m, 1, 29, 0x7, n);
240}
241
242static inline u32 msg_named(struct tipc_msg *m)
243{
244 return msg_type(m) == TIPC_NAMED_MSG;
245}
246
247static inline u32 msg_mcast(struct tipc_msg *m)
248{
249 return msg_type(m) == TIPC_MCAST_MSG;
250}
251
252static inline u32 msg_connected(struct tipc_msg *m)
253{
254 return msg_type(m) == TIPC_CONN_MSG;
255}
256
257static inline u32 msg_errcode(struct tipc_msg *m)
258{
259 return msg_bits(m, 1, 25, 0xf);
260}
261
262static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
263{
264 msg_set_bits(m, 1, 25, 0xf, err);
265}
266
267static inline u32 msg_reroute_cnt(struct tipc_msg *m)
268{
269 return msg_bits(m, 1, 21, 0xf);
270}
271
272static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
273{
274 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
275}
276
277static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
278{
279 msg_set_bits(m, 1, 21, 0xf, 0);
280}
281
282static inline u32 msg_lookup_scope(struct tipc_msg *m)
283{
284 return msg_bits(m, 1, 19, 0x3);
285}
286
287static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
288{
289 msg_set_bits(m, 1, 19, 0x3, n);
290}
291
292static inline u32 msg_bcast_ack(struct tipc_msg *m)
293{
294 return msg_bits(m, 1, 0, 0xffff);
295}
296
297static inline void msg_set_bcast_ack(struct tipc_msg *m, u32 n)
298{
299 msg_set_bits(m, 1, 0, 0xffff, n);
300}
301
302
303/*
304 * Word 2
305 */
306
307static inline u32 msg_ack(struct tipc_msg *m)
308{
309 return msg_bits(m, 2, 16, 0xffff);
310}
311
312static inline void msg_set_ack(struct tipc_msg *m, u32 n)
313{
314 msg_set_bits(m, 2, 16, 0xffff, n);
315}
316
317static inline u32 msg_seqno(struct tipc_msg *m)
318{
319 return msg_bits(m, 2, 0, 0xffff);
320}
321
322static inline void msg_set_seqno(struct tipc_msg *m, u32 n)
323{
324 msg_set_bits(m, 2, 0, 0xffff, n);
325}
326
327/*
328 * TIPC may utilize the "link ack #" and "link seq #" fields of a short
329 * message header to hold the destination node for the message, since the
330 * normal "dest node" field isn't present. This cache is only referenced
331 * when required, so populating the cache of a longer message header is
332 * harmless (as long as the header has the two link sequence fields present).
333 *
334 * Note: Host byte order is OK here, since the info never goes off-card.
335 */
336
337static inline u32 msg_destnode_cache(struct tipc_msg *m)
338{
339 return m->hdr[2];
340}
341
342static inline void msg_set_destnode_cache(struct tipc_msg *m, u32 dnode)
343{
344 m->hdr[2] = dnode;
345}
346
347/*
348 * Words 3-10
349 */
350
351
352static inline u32 msg_prevnode(struct tipc_msg *m)
353{
354 return msg_word(m, 3);
355}
356
357static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
358{
359 msg_set_word(m, 3, a);
360}
361
362static inline u32 msg_origport(struct tipc_msg *m)
363{
364 return msg_word(m, 4);
365}
366
367static inline void msg_set_origport(struct tipc_msg *m, u32 p)
368{
369 msg_set_word(m, 4, p);
370}
371
372static inline u32 msg_destport(struct tipc_msg *m)
373{
374 return msg_word(m, 5);
375}
376
377static inline void msg_set_destport(struct tipc_msg *m, u32 p)
378{
379 msg_set_word(m, 5, p);
380}
381
382static inline u32 msg_mc_netid(struct tipc_msg *m)
383{
384 return msg_word(m, 5);
385}
386
387static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
388{
389 msg_set_word(m, 5, p);
390}
391
392static inline int msg_short(struct tipc_msg *m)
393{
394 return msg_hdr_sz(m) == 24;
395}
396
397static inline u32 msg_orignode(struct tipc_msg *m)
398{
399 if (likely(msg_short(m)))
400 return msg_prevnode(m);
401 return msg_word(m, 6);
402}
403
404static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
405{
406 msg_set_word(m, 6, a);
407}
408
409static inline u32 msg_destnode(struct tipc_msg *m)
410{
411 return msg_word(m, 7);
412}
413
414static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
415{
416 msg_set_word(m, 7, a);
417}
418
419static inline int msg_is_dest(struct tipc_msg *m, u32 d)
420{
421 return msg_short(m) || (msg_destnode(m) == d);
422}
423
424static inline u32 msg_routed(struct tipc_msg *m)
425{
426 if (likely(msg_short(m)))
427 return 0;
428 return (msg_destnode(m) ^ msg_orignode(m)) >> 11;
429}
430
431static inline u32 msg_nametype(struct tipc_msg *m)
432{
433 return msg_word(m, 8);
434}
435
436static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
437{
438 msg_set_word(m, 8, n);
439}
440
441static inline u32 msg_transp_seqno(struct tipc_msg *m)
442{
443 return msg_word(m, 8);
444}
445
446static inline void msg_set_timestamp(struct tipc_msg *m, u32 n)
447{
448 msg_set_word(m, 8, n);
449}
450
451static inline u32 msg_timestamp(struct tipc_msg *m)
452{
453 return msg_word(m, 8);
454}
455
456static inline void msg_set_transp_seqno(struct tipc_msg *m, u32 n)
457{
458 msg_set_word(m, 8, n);
459}
460
461static inline u32 msg_nameinst(struct tipc_msg *m)
462{
463 return msg_word(m, 9);
464}
465
466static inline u32 msg_namelower(struct tipc_msg *m)
467{
468 return msg_nameinst(m);
469}
470
471static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
472{
473 msg_set_word(m, 9, n);
474}
475
476static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
477{
478 msg_set_namelower(m, n);
479}
480
481static inline u32 msg_nameupper(struct tipc_msg *m)
482{
483 return msg_word(m, 10);
484}
485
486static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
487{
488 msg_set_word(m, 10, n);
489}
490
491static inline unchar *msg_data(struct tipc_msg *m)
492{
493 return ((unchar *)m) + msg_hdr_sz(m);
494}
495
496static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
497{
498 return (struct tipc_msg *)msg_data(m);
499}
500
501
502/*
503 TIPC internal message header format, version 2
504
505 1 0 9 8 7 6 5 4|3 2 1 0 9 8 7 6|5 4 3 2 1 0 9 8|7 6 5 4 3 2 1 0
506 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
507 w0:|vers |msg usr|hdr sz |n|resrv| packet size |
508 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
509 w1:|m typ| sequence gap | broadcast ack no |
510 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
511 w2:| link level ack no/bc_gap_from | seq no / bcast_gap_to |
512 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
513 w3:| previous node |
514 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
515 w4:| next sent broadcast/fragm no | next sent pkt/ fragm msg no |
516 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
517 w5:| session no |rsv=0|r|berid|link prio|netpl|p|
518 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
519 w6:| originating node |
520 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
521 w7:| destination node |
522 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
523 w8:| transport sequence number |
524 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
525 w9:| msg count / bcast tag | link tolerance |
526 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
527 \ \
528 / User Specific Data /
529 \ \
530 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
531
532 NB: CONN_MANAGER use data message format. LINK_CONFIG has own format.
533*/
534
535/*
536 * Internal users
537 */
538
539#define BCAST_PROTOCOL 5
540#define MSG_BUNDLER 6
541#define LINK_PROTOCOL 7
542#define CONN_MANAGER 8
543#define ROUTE_DISTRIBUTOR 9 /* obsoleted */
544#define CHANGEOVER_PROTOCOL 10
545#define NAME_DISTRIBUTOR 11
546#define MSG_FRAGMENTER 12
547#define LINK_CONFIG 13
548#define DSC_H_SIZE 40
549
550/*
551 * Connection management protocol messages
552 */
553
554#define CONN_PROBE 0
555#define CONN_PROBE_REPLY 1
556#define CONN_ACK 2
557
558/*
559 * Name distributor messages
560 */
561
562#define PUBLICATION 0
563#define WITHDRAWAL 1
564
565
566/*
567 * Word 1
568 */
569
570static inline u32 msg_seq_gap(struct tipc_msg *m)
571{
572 return msg_bits(m, 1, 16, 0x1fff);
573}
574
575static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
576{
577 msg_set_bits(m, 1, 16, 0x1fff, n);
578}
579
580static inline u32 msg_req_links(struct tipc_msg *m)
581{
582 return msg_bits(m, 1, 16, 0xfff);
583}
584
585static inline void msg_set_req_links(struct tipc_msg *m, u32 n)
586{
587 msg_set_bits(m, 1, 16, 0xfff, n);
588}
589
590
591/*
592 * Word 2
593 */
594
595static inline u32 msg_dest_domain(struct tipc_msg *m)
596{
597 return msg_word(m, 2);
598}
599
600static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
601{
602 msg_set_word(m, 2, n);
603}
604
605static inline u32 msg_bcgap_after(struct tipc_msg *m)
606{
607 return msg_bits(m, 2, 16, 0xffff);
608}
609
610static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
611{
612 msg_set_bits(m, 2, 16, 0xffff, n);
613}
614
615static inline u32 msg_bcgap_to(struct tipc_msg *m)
616{
617 return msg_bits(m, 2, 0, 0xffff);
618}
619
620static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
621{
622 msg_set_bits(m, 2, 0, 0xffff, n);
623}
624
625
626/*
627 * Word 4
628 */
629
630static inline u32 msg_last_bcast(struct tipc_msg *m)
631{
632 return msg_bits(m, 4, 16, 0xffff);
633}
634
635static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
636{
637 msg_set_bits(m, 4, 16, 0xffff, n);
638}
639
640
641static inline u32 msg_fragm_no(struct tipc_msg *m)
642{
643 return msg_bits(m, 4, 16, 0xffff);
644}
645
646static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
647{
648 msg_set_bits(m, 4, 16, 0xffff, n);
649}
650
651
652static inline u32 msg_next_sent(struct tipc_msg *m)
653{
654 return msg_bits(m, 4, 0, 0xffff);
655}
656
657static inline void msg_set_next_sent(struct tipc_msg *m, u32 n)
658{
659 msg_set_bits(m, 4, 0, 0xffff, n);
660}
661
662
663static inline u32 msg_long_msgno(struct tipc_msg *m)
664{
665 return msg_bits(m, 4, 0, 0xffff);
666}
667
668static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
669{
670 msg_set_bits(m, 4, 0, 0xffff, n);
671}
672
673static inline u32 msg_bc_netid(struct tipc_msg *m)
674{
675 return msg_word(m, 4);
676}
677
678static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
679{
680 msg_set_word(m, 4, id);
681}
682
683static inline u32 msg_link_selector(struct tipc_msg *m)
684{
685 return msg_bits(m, 4, 0, 1);
686}
687
688static inline void msg_set_link_selector(struct tipc_msg *m, u32 n)
689{
690 msg_set_bits(m, 4, 0, 1, (n & 1));
691}
692
693/*
694 * Word 5
695 */
696
697static inline u32 msg_session(struct tipc_msg *m)
698{
699 return msg_bits(m, 5, 16, 0xffff);
700}
701
702static inline void msg_set_session(struct tipc_msg *m, u32 n)
703{
704 msg_set_bits(m, 5, 16, 0xffff, n);
705}
706
707static inline u32 msg_probe(struct tipc_msg *m)
708{
709 return msg_bits(m, 5, 0, 1);
710}
711
712static inline void msg_set_probe(struct tipc_msg *m, u32 val)
713{
714 msg_set_bits(m, 5, 0, 1, (val & 1));
715}
716
717static inline char msg_net_plane(struct tipc_msg *m)
718{
719 return msg_bits(m, 5, 1, 7) + 'A';
720}
721
722static inline void msg_set_net_plane(struct tipc_msg *m, char n)
723{
724 msg_set_bits(m, 5, 1, 7, (n - 'A'));
725}
726
727static inline u32 msg_linkprio(struct tipc_msg *m)
728{
729 return msg_bits(m, 5, 4, 0x1f);
730}
731
732static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
733{
734 msg_set_bits(m, 5, 4, 0x1f, n);
735}
736
737static inline u32 msg_bearer_id(struct tipc_msg *m)
738{
739 return msg_bits(m, 5, 9, 0x7);
740}
741
742static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
743{
744 msg_set_bits(m, 5, 9, 0x7, n);
745}
746
747static inline u32 msg_redundant_link(struct tipc_msg *m)
748{
749 return msg_bits(m, 5, 12, 0x1);
750}
751
752static inline void msg_set_redundant_link(struct tipc_msg *m)
753{
754 msg_set_bits(m, 5, 12, 0x1, 1);
755}
756
757static inline void msg_clear_redundant_link(struct tipc_msg *m)
758{
759 msg_set_bits(m, 5, 12, 0x1, 0);
760}
761
762
763/*
764 * Word 9
765 */
766
767static inline u32 msg_msgcnt(struct tipc_msg *m)
768{
769 return msg_bits(m, 9, 16, 0xffff);
770}
771
772static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n)
773{
774 msg_set_bits(m, 9, 16, 0xffff, n);
775}
776
777static inline u32 msg_bcast_tag(struct tipc_msg *m)
778{
779 return msg_bits(m, 9, 16, 0xffff);
780}
781
782static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n)
783{
784 msg_set_bits(m, 9, 16, 0xffff, n);
785}
786
787static inline u32 msg_max_pkt(struct tipc_msg *m)
788{
789 return msg_bits(m, 9, 16, 0xffff) * 4;
790}
791
792static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
793{
794 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
795}
796
797static inline u32 msg_link_tolerance(struct tipc_msg *m)
798{
799 return msg_bits(m, 9, 0, 0xffff);
800}
801
802static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
803{
804 msg_set_bits(m, 9, 0, 0xffff, n);
805}
806
807/*
808 * Routing table message data
809 */
810
811
812static inline u32 msg_remote_node(struct tipc_msg *m)
813{
814 return msg_word(m, msg_hdr_sz(m)/4);
815}
816
817static inline void msg_set_remote_node(struct tipc_msg *m, u32 a)
818{
819 msg_set_word(m, msg_hdr_sz(m)/4, a);
820}
821
822/*
823 * Segmentation message types
824 */
825
826#define FIRST_FRAGMENT 0
827#define FRAGMENT 1
828#define LAST_FRAGMENT 2
829
830/*
831 * Link management protocol message types
832 */
833
834#define STATE_MSG 0
835#define RESET_MSG 1
836#define ACTIVATE_MSG 2
837
838/*
839 * Changeover tunnel message types
840 */
841#define DUPLICATE_MSG 0
842#define ORIGINAL_MSG 1
843
844/*
845 * Routing table message types
846 */
847#define EXT_ROUTING_TABLE 0
848#define LOCAL_ROUTING_TABLE 1 /* obsoleted */
849#define SLAVE_ROUTING_TABLE 2
850#define ROUTE_ADDITION 3
851#define ROUTE_REMOVAL 4
852
853/*
854 * Config protocol message types
855 */
856
857#define DSC_REQ_MSG 0
858#define DSC_RESP_MSG 1
859
860u32 tipc_msg_tot_importance(struct tipc_msg *m);
861void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type,
862 u32 hsize, u32 destnode);
863int tipc_msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect);
864int tipc_msg_build(struct tipc_msg *hdr,
865 struct iovec const *msg_sect, u32 num_sect,
866 int max_size, int usrmem, struct sk_buff **buf);
867
868static inline void msg_set_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
869{
870 memcpy(&((int *)m)[5], a, sizeof(*a));
871}
872
873static inline void msg_get_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
874{
875 memcpy(a, &((int *)m)[5], sizeof(*a));
876}
877
878#endif