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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, 2010-2011, 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/*
43 * Constants and routines used to read and write TIPC payload message headers
44 *
45 * Note: Some items are also used with TIPC internal message headers
46 */
47
48#define TIPC_VERSION 2
49
50/*
51 * Payload message users are defined in TIPC's public API:
52 * - TIPC_LOW_IMPORTANCE
53 * - TIPC_MEDIUM_IMPORTANCE
54 * - TIPC_HIGH_IMPORTANCE
55 * - TIPC_CRITICAL_IMPORTANCE
56 */
57
58/*
59 * Payload message types
60 */
61
62#define TIPC_CONN_MSG 0
63#define TIPC_MCAST_MSG 1
64#define TIPC_NAMED_MSG 2
65#define TIPC_DIRECT_MSG 3
66
67/*
68 * Message header sizes
69 */
70
71#define SHORT_H_SIZE 24 /* In-cluster basic payload message */
72#define BASIC_H_SIZE 32 /* Basic payload message */
73#define NAMED_H_SIZE 40 /* Named payload message */
74#define MCAST_H_SIZE 44 /* Multicast payload message */
75#define INT_H_SIZE 40 /* Internal messages */
76#define MIN_H_SIZE 24 /* Smallest legal TIPC header size */
77#define MAX_H_SIZE 60 /* Largest possible TIPC header size */
78
79#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
80
81
82struct tipc_msg {
83 __be32 hdr[15];
84};
85
86
87static inline u32 msg_word(struct tipc_msg *m, u32 pos)
88{
89 return ntohl(m->hdr[pos]);
90}
91
92static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
93{
94 m->hdr[w] = htonl(val);
95}
96
97static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
98{
99 return (msg_word(m, w) >> pos) & mask;
100}
101
102static inline void msg_set_bits(struct tipc_msg *m, u32 w,
103 u32 pos, u32 mask, u32 val)
104{
105 val = (val & mask) << pos;
106 mask = mask << pos;
107 m->hdr[w] &= ~htonl(mask);
108 m->hdr[w] |= htonl(val);
109}
110
111static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
112{
113 u32 temp = msg->hdr[a];
114
115 msg->hdr[a] = msg->hdr[b];
116 msg->hdr[b] = temp;
117}
118
119/*
120 * Word 0
121 */
122
123static inline u32 msg_version(struct tipc_msg *m)
124{
125 return msg_bits(m, 0, 29, 7);
126}
127
128static inline void msg_set_version(struct tipc_msg *m)
129{
130 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
131}
132
133static inline u32 msg_user(struct tipc_msg *m)
134{
135 return msg_bits(m, 0, 25, 0xf);
136}
137
138static inline u32 msg_isdata(struct tipc_msg *m)
139{
140 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
141}
142
143static inline void msg_set_user(struct tipc_msg *m, u32 n)
144{
145 msg_set_bits(m, 0, 25, 0xf, n);
146}
147
148static inline u32 msg_importance(struct tipc_msg *m)
149{
150 return msg_bits(m, 0, 25, 0xf);
151}
152
153static inline void msg_set_importance(struct tipc_msg *m, u32 i)
154{
155 msg_set_user(m, i);
156}
157
158static inline u32 msg_hdr_sz(struct tipc_msg *m)
159{
160 return msg_bits(m, 0, 21, 0xf) << 2;
161}
162
163static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
164{
165 msg_set_bits(m, 0, 21, 0xf, n>>2);
166}
167
168static inline u32 msg_size(struct tipc_msg *m)
169{
170 return msg_bits(m, 0, 0, 0x1ffff);
171}
172
173static inline u32 msg_data_sz(struct tipc_msg *m)
174{
175 return msg_size(m) - msg_hdr_sz(m);
176}
177
178static inline int msg_non_seq(struct tipc_msg *m)
179{
180 return msg_bits(m, 0, 20, 1);
181}
182
183static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
184{
185 msg_set_bits(m, 0, 20, 1, n);
186}
187
188static inline int msg_dest_droppable(struct tipc_msg *m)
189{
190 return msg_bits(m, 0, 19, 1);
191}
192
193static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
194{
195 msg_set_bits(m, 0, 19, 1, d);
196}
197
198static inline int msg_src_droppable(struct tipc_msg *m)
199{
200 return msg_bits(m, 0, 18, 1);
201}
202
203static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
204{
205 msg_set_bits(m, 0, 18, 1, d);
206}
207
208static inline void msg_set_size(struct tipc_msg *m, u32 sz)
209{
210 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
211}
212
213
214/*
215 * Word 1
216 */
217
218static inline u32 msg_type(struct tipc_msg *m)
219{
220 return msg_bits(m, 1, 29, 0x7);
221}
222
223static inline void msg_set_type(struct tipc_msg *m, u32 n)
224{
225 msg_set_bits(m, 1, 29, 0x7, n);
226}
227
228static inline u32 msg_named(struct tipc_msg *m)
229{
230 return msg_type(m) == TIPC_NAMED_MSG;
231}
232
233static inline u32 msg_mcast(struct tipc_msg *m)
234{
235 return msg_type(m) == TIPC_MCAST_MSG;
236}
237
238static inline u32 msg_connected(struct tipc_msg *m)
239{
240 return msg_type(m) == TIPC_CONN_MSG;
241}
242
243static inline u32 msg_errcode(struct tipc_msg *m)
244{
245 return msg_bits(m, 1, 25, 0xf);
246}
247
248static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
249{
250 msg_set_bits(m, 1, 25, 0xf, err);
251}
252
253static inline u32 msg_reroute_cnt(struct tipc_msg *m)
254{
255 return msg_bits(m, 1, 21, 0xf);
256}
257
258static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
259{
260 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
261}
262
263static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
264{
265 msg_set_bits(m, 1, 21, 0xf, 0);
266}
267
268static inline u32 msg_lookup_scope(struct tipc_msg *m)
269{
270 return msg_bits(m, 1, 19, 0x3);
271}
272
273static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
274{
275 msg_set_bits(m, 1, 19, 0x3, n);
276}
277
278static inline u32 msg_bcast_ack(struct tipc_msg *m)
279{
280 return msg_bits(m, 1, 0, 0xffff);
281}
282
283static inline void msg_set_bcast_ack(struct tipc_msg *m, u32 n)
284{
285 msg_set_bits(m, 1, 0, 0xffff, n);
286}
287
288
289/*
290 * Word 2
291 */
292
293static inline u32 msg_ack(struct tipc_msg *m)
294{
295 return msg_bits(m, 2, 16, 0xffff);
296}
297
298static inline void msg_set_ack(struct tipc_msg *m, u32 n)
299{
300 msg_set_bits(m, 2, 16, 0xffff, n);
301}
302
303static inline u32 msg_seqno(struct tipc_msg *m)
304{
305 return msg_bits(m, 2, 0, 0xffff);
306}
307
308static inline void msg_set_seqno(struct tipc_msg *m, u32 n)
309{
310 msg_set_bits(m, 2, 0, 0xffff, n);
311}
312
313/*
314 * Words 3-10
315 */
316
317
318static inline u32 msg_prevnode(struct tipc_msg *m)
319{
320 return msg_word(m, 3);
321}
322
323static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
324{
325 msg_set_word(m, 3, a);
326}
327
328static inline u32 msg_origport(struct tipc_msg *m)
329{
330 return msg_word(m, 4);
331}
332
333static inline void msg_set_origport(struct tipc_msg *m, u32 p)
334{
335 msg_set_word(m, 4, p);
336}
337
338static inline u32 msg_destport(struct tipc_msg *m)
339{
340 return msg_word(m, 5);
341}
342
343static inline void msg_set_destport(struct tipc_msg *m, u32 p)
344{
345 msg_set_word(m, 5, p);
346}
347
348static inline u32 msg_mc_netid(struct tipc_msg *m)
349{
350 return msg_word(m, 5);
351}
352
353static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
354{
355 msg_set_word(m, 5, p);
356}
357
358static inline int msg_short(struct tipc_msg *m)
359{
360 return msg_hdr_sz(m) == SHORT_H_SIZE;
361}
362
363static inline u32 msg_orignode(struct tipc_msg *m)
364{
365 if (likely(msg_short(m)))
366 return msg_prevnode(m);
367 return msg_word(m, 6);
368}
369
370static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
371{
372 msg_set_word(m, 6, a);
373}
374
375static inline u32 msg_destnode(struct tipc_msg *m)
376{
377 return msg_word(m, 7);
378}
379
380static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
381{
382 msg_set_word(m, 7, a);
383}
384
385static inline int msg_is_dest(struct tipc_msg *m, u32 d)
386{
387 return msg_short(m) || (msg_destnode(m) == d);
388}
389
390static inline u32 msg_nametype(struct tipc_msg *m)
391{
392 return msg_word(m, 8);
393}
394
395static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
396{
397 msg_set_word(m, 8, n);
398}
399
400static inline u32 msg_nameinst(struct tipc_msg *m)
401{
402 return msg_word(m, 9);
403}
404
405static inline u32 msg_namelower(struct tipc_msg *m)
406{
407 return msg_nameinst(m);
408}
409
410static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
411{
412 msg_set_word(m, 9, n);
413}
414
415static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
416{
417 msg_set_namelower(m, n);
418}
419
420static inline u32 msg_nameupper(struct tipc_msg *m)
421{
422 return msg_word(m, 10);
423}
424
425static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
426{
427 msg_set_word(m, 10, n);
428}
429
430static inline unchar *msg_data(struct tipc_msg *m)
431{
432 return ((unchar *)m) + msg_hdr_sz(m);
433}
434
435static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
436{
437 return (struct tipc_msg *)msg_data(m);
438}
439
440
441/*
442 * Constants and routines used to read and write TIPC internal message headers
443 */
444
445/*
446 * Internal message users
447 */
448
449#define BCAST_PROTOCOL 5
450#define MSG_BUNDLER 6
451#define LINK_PROTOCOL 7
452#define CONN_MANAGER 8
453#define ROUTE_DISTRIBUTOR 9 /* obsoleted */
454#define CHANGEOVER_PROTOCOL 10
455#define NAME_DISTRIBUTOR 11
456#define MSG_FRAGMENTER 12
457#define LINK_CONFIG 13
458
459/*
460 * Connection management protocol message types
461 */
462
463#define CONN_PROBE 0
464#define CONN_PROBE_REPLY 1
465#define CONN_ACK 2
466
467/*
468 * Name distributor message types
469 */
470
471#define PUBLICATION 0
472#define WITHDRAWAL 1
473
474/*
475 * Segmentation message types
476 */
477
478#define FIRST_FRAGMENT 0
479#define FRAGMENT 1
480#define LAST_FRAGMENT 2
481
482/*
483 * Link management protocol message types
484 */
485
486#define STATE_MSG 0
487#define RESET_MSG 1
488#define ACTIVATE_MSG 2
489
490/*
491 * Changeover tunnel message types
492 */
493#define DUPLICATE_MSG 0
494#define ORIGINAL_MSG 1
495
496/*
497 * Config protocol message types
498 */
499
500#define DSC_REQ_MSG 0
501#define DSC_RESP_MSG 1
502
503
504/*
505 * Word 1
506 */
507
508static inline u32 msg_seq_gap(struct tipc_msg *m)
509{
510 return msg_bits(m, 1, 16, 0x1fff);
511}
512
513static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
514{
515 msg_set_bits(m, 1, 16, 0x1fff, n);
516}
517
518
519/*
520 * Word 2
521 */
522
523static inline u32 msg_dest_domain(struct tipc_msg *m)
524{
525 return msg_word(m, 2);
526}
527
528static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
529{
530 msg_set_word(m, 2, n);
531}
532
533static inline u32 msg_bcgap_after(struct tipc_msg *m)
534{
535 return msg_bits(m, 2, 16, 0xffff);
536}
537
538static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
539{
540 msg_set_bits(m, 2, 16, 0xffff, n);
541}
542
543static inline u32 msg_bcgap_to(struct tipc_msg *m)
544{
545 return msg_bits(m, 2, 0, 0xffff);
546}
547
548static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
549{
550 msg_set_bits(m, 2, 0, 0xffff, n);
551}
552
553
554/*
555 * Word 4
556 */
557
558static inline u32 msg_last_bcast(struct tipc_msg *m)
559{
560 return msg_bits(m, 4, 16, 0xffff);
561}
562
563static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
564{
565 msg_set_bits(m, 4, 16, 0xffff, n);
566}
567
568
569static inline u32 msg_fragm_no(struct tipc_msg *m)
570{
571 return msg_bits(m, 4, 16, 0xffff);
572}
573
574static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
575{
576 msg_set_bits(m, 4, 16, 0xffff, n);
577}
578
579
580static inline u32 msg_next_sent(struct tipc_msg *m)
581{
582 return msg_bits(m, 4, 0, 0xffff);
583}
584
585static inline void msg_set_next_sent(struct tipc_msg *m, u32 n)
586{
587 msg_set_bits(m, 4, 0, 0xffff, n);
588}
589
590
591static inline u32 msg_long_msgno(struct tipc_msg *m)
592{
593 return msg_bits(m, 4, 0, 0xffff);
594}
595
596static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
597{
598 msg_set_bits(m, 4, 0, 0xffff, n);
599}
600
601static inline u32 msg_bc_netid(struct tipc_msg *m)
602{
603 return msg_word(m, 4);
604}
605
606static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
607{
608 msg_set_word(m, 4, id);
609}
610
611static inline u32 msg_link_selector(struct tipc_msg *m)
612{
613 return msg_bits(m, 4, 0, 1);
614}
615
616static inline void msg_set_link_selector(struct tipc_msg *m, u32 n)
617{
618 msg_set_bits(m, 4, 0, 1, n);
619}
620
621/*
622 * Word 5
623 */
624
625static inline u32 msg_session(struct tipc_msg *m)
626{
627 return msg_bits(m, 5, 16, 0xffff);
628}
629
630static inline void msg_set_session(struct tipc_msg *m, u32 n)
631{
632 msg_set_bits(m, 5, 16, 0xffff, n);
633}
634
635static inline u32 msg_probe(struct tipc_msg *m)
636{
637 return msg_bits(m, 5, 0, 1);
638}
639
640static inline void msg_set_probe(struct tipc_msg *m, u32 val)
641{
642 msg_set_bits(m, 5, 0, 1, val);
643}
644
645static inline char msg_net_plane(struct tipc_msg *m)
646{
647 return msg_bits(m, 5, 1, 7) + 'A';
648}
649
650static inline void msg_set_net_plane(struct tipc_msg *m, char n)
651{
652 msg_set_bits(m, 5, 1, 7, (n - 'A'));
653}
654
655static inline u32 msg_linkprio(struct tipc_msg *m)
656{
657 return msg_bits(m, 5, 4, 0x1f);
658}
659
660static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
661{
662 msg_set_bits(m, 5, 4, 0x1f, n);
663}
664
665static inline u32 msg_bearer_id(struct tipc_msg *m)
666{
667 return msg_bits(m, 5, 9, 0x7);
668}
669
670static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
671{
672 msg_set_bits(m, 5, 9, 0x7, n);
673}
674
675static inline u32 msg_redundant_link(struct tipc_msg *m)
676{
677 return msg_bits(m, 5, 12, 0x1);
678}
679
680static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
681{
682 msg_set_bits(m, 5, 12, 0x1, r);
683}
684
685
686/*
687 * Word 9
688 */
689
690static inline u32 msg_msgcnt(struct tipc_msg *m)
691{
692 return msg_bits(m, 9, 16, 0xffff);
693}
694
695static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n)
696{
697 msg_set_bits(m, 9, 16, 0xffff, n);
698}
699
700static inline u32 msg_bcast_tag(struct tipc_msg *m)
701{
702 return msg_bits(m, 9, 16, 0xffff);
703}
704
705static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n)
706{
707 msg_set_bits(m, 9, 16, 0xffff, n);
708}
709
710static inline u32 msg_max_pkt(struct tipc_msg *m)
711{
712 return msg_bits(m, 9, 16, 0xffff) * 4;
713}
714
715static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
716{
717 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
718}
719
720static inline u32 msg_link_tolerance(struct tipc_msg *m)
721{
722 return msg_bits(m, 9, 0, 0xffff);
723}
724
725static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
726{
727 msg_set_bits(m, 9, 0, 0xffff, n);
728}
729
730u32 tipc_msg_tot_importance(struct tipc_msg *m);
731void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type,
732 u32 hsize, u32 destnode);
733int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect,
734 u32 num_sect, unsigned int total_len,
735 int max_size, int usrmem, struct sk_buff **buf);
736
737static inline void msg_set_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
738{
739 memcpy(&((int *)m)[5], a, sizeof(*a));
740}
741
742static inline void msg_get_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
743{
744 memcpy(a, &((int *)m)[5], sizeof(*a));
745}
746
747#endif
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, 2010-2011, 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/*
43 * Constants and routines used to read and write TIPC payload message headers
44 *
45 * Note: Some items are also used with TIPC internal message headers
46 */
47#define TIPC_VERSION 2
48
49/*
50 * Payload message users are defined in TIPC's public API:
51 * - TIPC_LOW_IMPORTANCE
52 * - TIPC_MEDIUM_IMPORTANCE
53 * - TIPC_HIGH_IMPORTANCE
54 * - TIPC_CRITICAL_IMPORTANCE
55 */
56
57/*
58 * Payload message types
59 */
60#define TIPC_CONN_MSG 0
61#define TIPC_MCAST_MSG 1
62#define TIPC_NAMED_MSG 2
63#define TIPC_DIRECT_MSG 3
64
65/*
66 * Message header sizes
67 */
68#define SHORT_H_SIZE 24 /* In-cluster basic payload message */
69#define BASIC_H_SIZE 32 /* Basic payload message */
70#define NAMED_H_SIZE 40 /* Named payload message */
71#define MCAST_H_SIZE 44 /* Multicast payload message */
72#define INT_H_SIZE 40 /* Internal messages */
73#define MIN_H_SIZE 24 /* Smallest legal TIPC header size */
74#define MAX_H_SIZE 60 /* Largest possible TIPC header size */
75
76#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
77
78#define TIPC_MEDIA_ADDR_OFFSET 5
79
80
81struct tipc_msg {
82 __be32 hdr[15];
83};
84
85
86static inline u32 msg_word(struct tipc_msg *m, u32 pos)
87{
88 return ntohl(m->hdr[pos]);
89}
90
91static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
92{
93 m->hdr[w] = htonl(val);
94}
95
96static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
97{
98 return (msg_word(m, w) >> pos) & mask;
99}
100
101static inline void msg_set_bits(struct tipc_msg *m, u32 w,
102 u32 pos, u32 mask, u32 val)
103{
104 val = (val & mask) << pos;
105 mask = mask << pos;
106 m->hdr[w] &= ~htonl(mask);
107 m->hdr[w] |= htonl(val);
108}
109
110static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
111{
112 u32 temp = msg->hdr[a];
113
114 msg->hdr[a] = msg->hdr[b];
115 msg->hdr[b] = temp;
116}
117
118/*
119 * Word 0
120 */
121static inline u32 msg_version(struct tipc_msg *m)
122{
123 return msg_bits(m, 0, 29, 7);
124}
125
126static inline void msg_set_version(struct tipc_msg *m)
127{
128 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
129}
130
131static inline u32 msg_user(struct tipc_msg *m)
132{
133 return msg_bits(m, 0, 25, 0xf);
134}
135
136static inline u32 msg_isdata(struct tipc_msg *m)
137{
138 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
139}
140
141static inline void msg_set_user(struct tipc_msg *m, u32 n)
142{
143 msg_set_bits(m, 0, 25, 0xf, n);
144}
145
146static inline u32 msg_importance(struct tipc_msg *m)
147{
148 return msg_bits(m, 0, 25, 0xf);
149}
150
151static inline void msg_set_importance(struct tipc_msg *m, u32 i)
152{
153 msg_set_user(m, i);
154}
155
156static inline u32 msg_hdr_sz(struct tipc_msg *m)
157{
158 return msg_bits(m, 0, 21, 0xf) << 2;
159}
160
161static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
162{
163 msg_set_bits(m, 0, 21, 0xf, n>>2);
164}
165
166static inline u32 msg_size(struct tipc_msg *m)
167{
168 return msg_bits(m, 0, 0, 0x1ffff);
169}
170
171static inline u32 msg_data_sz(struct tipc_msg *m)
172{
173 return msg_size(m) - msg_hdr_sz(m);
174}
175
176static inline int msg_non_seq(struct tipc_msg *m)
177{
178 return msg_bits(m, 0, 20, 1);
179}
180
181static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
182{
183 msg_set_bits(m, 0, 20, 1, n);
184}
185
186static inline int msg_dest_droppable(struct tipc_msg *m)
187{
188 return msg_bits(m, 0, 19, 1);
189}
190
191static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
192{
193 msg_set_bits(m, 0, 19, 1, d);
194}
195
196static inline int msg_src_droppable(struct tipc_msg *m)
197{
198 return msg_bits(m, 0, 18, 1);
199}
200
201static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
202{
203 msg_set_bits(m, 0, 18, 1, d);
204}
205
206static inline void msg_set_size(struct tipc_msg *m, u32 sz)
207{
208 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
209}
210
211
212/*
213 * Word 1
214 */
215static inline u32 msg_type(struct tipc_msg *m)
216{
217 return msg_bits(m, 1, 29, 0x7);
218}
219
220static inline void msg_set_type(struct tipc_msg *m, u32 n)
221{
222 msg_set_bits(m, 1, 29, 0x7, n);
223}
224
225static inline u32 msg_named(struct tipc_msg *m)
226{
227 return msg_type(m) == TIPC_NAMED_MSG;
228}
229
230static inline u32 msg_mcast(struct tipc_msg *m)
231{
232 return msg_type(m) == TIPC_MCAST_MSG;
233}
234
235static inline u32 msg_connected(struct tipc_msg *m)
236{
237 return msg_type(m) == TIPC_CONN_MSG;
238}
239
240static inline u32 msg_errcode(struct tipc_msg *m)
241{
242 return msg_bits(m, 1, 25, 0xf);
243}
244
245static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
246{
247 msg_set_bits(m, 1, 25, 0xf, err);
248}
249
250static inline u32 msg_reroute_cnt(struct tipc_msg *m)
251{
252 return msg_bits(m, 1, 21, 0xf);
253}
254
255static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
256{
257 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
258}
259
260static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
261{
262 msg_set_bits(m, 1, 21, 0xf, 0);
263}
264
265static inline u32 msg_lookup_scope(struct tipc_msg *m)
266{
267 return msg_bits(m, 1, 19, 0x3);
268}
269
270static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
271{
272 msg_set_bits(m, 1, 19, 0x3, n);
273}
274
275static inline u32 msg_bcast_ack(struct tipc_msg *m)
276{
277 return msg_bits(m, 1, 0, 0xffff);
278}
279
280static inline void msg_set_bcast_ack(struct tipc_msg *m, u32 n)
281{
282 msg_set_bits(m, 1, 0, 0xffff, n);
283}
284
285
286/*
287 * Word 2
288 */
289static inline u32 msg_ack(struct tipc_msg *m)
290{
291 return msg_bits(m, 2, 16, 0xffff);
292}
293
294static inline void msg_set_ack(struct tipc_msg *m, u32 n)
295{
296 msg_set_bits(m, 2, 16, 0xffff, n);
297}
298
299static inline u32 msg_seqno(struct tipc_msg *m)
300{
301 return msg_bits(m, 2, 0, 0xffff);
302}
303
304static inline void msg_set_seqno(struct tipc_msg *m, u32 n)
305{
306 msg_set_bits(m, 2, 0, 0xffff, n);
307}
308
309/*
310 * Words 3-10
311 */
312static inline u32 msg_prevnode(struct tipc_msg *m)
313{
314 return msg_word(m, 3);
315}
316
317static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
318{
319 msg_set_word(m, 3, a);
320}
321
322static inline u32 msg_origport(struct tipc_msg *m)
323{
324 return msg_word(m, 4);
325}
326
327static inline void msg_set_origport(struct tipc_msg *m, u32 p)
328{
329 msg_set_word(m, 4, p);
330}
331
332static inline u32 msg_destport(struct tipc_msg *m)
333{
334 return msg_word(m, 5);
335}
336
337static inline void msg_set_destport(struct tipc_msg *m, u32 p)
338{
339 msg_set_word(m, 5, p);
340}
341
342static inline u32 msg_mc_netid(struct tipc_msg *m)
343{
344 return msg_word(m, 5);
345}
346
347static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
348{
349 msg_set_word(m, 5, p);
350}
351
352static inline int msg_short(struct tipc_msg *m)
353{
354 return msg_hdr_sz(m) == SHORT_H_SIZE;
355}
356
357static inline u32 msg_orignode(struct tipc_msg *m)
358{
359 if (likely(msg_short(m)))
360 return msg_prevnode(m);
361 return msg_word(m, 6);
362}
363
364static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
365{
366 msg_set_word(m, 6, a);
367}
368
369static inline u32 msg_destnode(struct tipc_msg *m)
370{
371 return msg_word(m, 7);
372}
373
374static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
375{
376 msg_set_word(m, 7, a);
377}
378
379static inline u32 msg_nametype(struct tipc_msg *m)
380{
381 return msg_word(m, 8);
382}
383
384static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
385{
386 msg_set_word(m, 8, n);
387}
388
389static inline u32 msg_nameinst(struct tipc_msg *m)
390{
391 return msg_word(m, 9);
392}
393
394static inline u32 msg_namelower(struct tipc_msg *m)
395{
396 return msg_nameinst(m);
397}
398
399static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
400{
401 msg_set_word(m, 9, n);
402}
403
404static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
405{
406 msg_set_namelower(m, n);
407}
408
409static inline u32 msg_nameupper(struct tipc_msg *m)
410{
411 return msg_word(m, 10);
412}
413
414static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
415{
416 msg_set_word(m, 10, n);
417}
418
419static inline unchar *msg_data(struct tipc_msg *m)
420{
421 return ((unchar *)m) + msg_hdr_sz(m);
422}
423
424static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
425{
426 return (struct tipc_msg *)msg_data(m);
427}
428
429/*
430 * Constants and routines used to read and write TIPC internal message headers
431 */
432
433/*
434 * Internal message users
435 */
436#define BCAST_PROTOCOL 5
437#define MSG_BUNDLER 6
438#define LINK_PROTOCOL 7
439#define CONN_MANAGER 8
440#define ROUTE_DISTRIBUTOR 9 /* obsoleted */
441#define CHANGEOVER_PROTOCOL 10
442#define NAME_DISTRIBUTOR 11
443#define MSG_FRAGMENTER 12
444#define LINK_CONFIG 13
445
446/*
447 * Connection management protocol message types
448 */
449#define CONN_PROBE 0
450#define CONN_PROBE_REPLY 1
451#define CONN_ACK 2
452
453/*
454 * Name distributor message types
455 */
456#define PUBLICATION 0
457#define WITHDRAWAL 1
458
459/*
460 * Segmentation message types
461 */
462#define FIRST_FRAGMENT 0
463#define FRAGMENT 1
464#define LAST_FRAGMENT 2
465
466/*
467 * Link management protocol message types
468 */
469#define STATE_MSG 0
470#define RESET_MSG 1
471#define ACTIVATE_MSG 2
472
473/*
474 * Changeover tunnel message types
475 */
476#define DUPLICATE_MSG 0
477#define ORIGINAL_MSG 1
478
479/*
480 * Config protocol message types
481 */
482#define DSC_REQ_MSG 0
483#define DSC_RESP_MSG 1
484
485
486/*
487 * Word 1
488 */
489static inline u32 msg_seq_gap(struct tipc_msg *m)
490{
491 return msg_bits(m, 1, 16, 0x1fff);
492}
493
494static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
495{
496 msg_set_bits(m, 1, 16, 0x1fff, n);
497}
498
499static inline u32 msg_node_sig(struct tipc_msg *m)
500{
501 return msg_bits(m, 1, 0, 0xffff);
502}
503
504static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
505{
506 msg_set_bits(m, 1, 0, 0xffff, n);
507}
508
509
510/*
511 * Word 2
512 */
513static inline u32 msg_dest_domain(struct tipc_msg *m)
514{
515 return msg_word(m, 2);
516}
517
518static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
519{
520 msg_set_word(m, 2, n);
521}
522
523static inline u32 msg_bcgap_after(struct tipc_msg *m)
524{
525 return msg_bits(m, 2, 16, 0xffff);
526}
527
528static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
529{
530 msg_set_bits(m, 2, 16, 0xffff, n);
531}
532
533static inline u32 msg_bcgap_to(struct tipc_msg *m)
534{
535 return msg_bits(m, 2, 0, 0xffff);
536}
537
538static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
539{
540 msg_set_bits(m, 2, 0, 0xffff, n);
541}
542
543
544/*
545 * Word 4
546 */
547static inline u32 msg_last_bcast(struct tipc_msg *m)
548{
549 return msg_bits(m, 4, 16, 0xffff);
550}
551
552static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
553{
554 msg_set_bits(m, 4, 16, 0xffff, n);
555}
556
557static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
558{
559 msg_set_bits(m, 4, 16, 0xffff, n);
560}
561
562
563static inline u32 msg_next_sent(struct tipc_msg *m)
564{
565 return msg_bits(m, 4, 0, 0xffff);
566}
567
568static inline void msg_set_next_sent(struct tipc_msg *m, u32 n)
569{
570 msg_set_bits(m, 4, 0, 0xffff, n);
571}
572
573static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
574{
575 msg_set_bits(m, 4, 0, 0xffff, n);
576}
577
578static inline u32 msg_bc_netid(struct tipc_msg *m)
579{
580 return msg_word(m, 4);
581}
582
583static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
584{
585 msg_set_word(m, 4, id);
586}
587
588static inline u32 msg_link_selector(struct tipc_msg *m)
589{
590 return msg_bits(m, 4, 0, 1);
591}
592
593static inline void msg_set_link_selector(struct tipc_msg *m, u32 n)
594{
595 msg_set_bits(m, 4, 0, 1, n);
596}
597
598/*
599 * Word 5
600 */
601static inline u32 msg_session(struct tipc_msg *m)
602{
603 return msg_bits(m, 5, 16, 0xffff);
604}
605
606static inline void msg_set_session(struct tipc_msg *m, u32 n)
607{
608 msg_set_bits(m, 5, 16, 0xffff, n);
609}
610
611static inline u32 msg_probe(struct tipc_msg *m)
612{
613 return msg_bits(m, 5, 0, 1);
614}
615
616static inline void msg_set_probe(struct tipc_msg *m, u32 val)
617{
618 msg_set_bits(m, 5, 0, 1, val);
619}
620
621static inline char msg_net_plane(struct tipc_msg *m)
622{
623 return msg_bits(m, 5, 1, 7) + 'A';
624}
625
626static inline void msg_set_net_plane(struct tipc_msg *m, char n)
627{
628 msg_set_bits(m, 5, 1, 7, (n - 'A'));
629}
630
631static inline u32 msg_linkprio(struct tipc_msg *m)
632{
633 return msg_bits(m, 5, 4, 0x1f);
634}
635
636static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
637{
638 msg_set_bits(m, 5, 4, 0x1f, n);
639}
640
641static inline u32 msg_bearer_id(struct tipc_msg *m)
642{
643 return msg_bits(m, 5, 9, 0x7);
644}
645
646static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
647{
648 msg_set_bits(m, 5, 9, 0x7, n);
649}
650
651static inline u32 msg_redundant_link(struct tipc_msg *m)
652{
653 return msg_bits(m, 5, 12, 0x1);
654}
655
656static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
657{
658 msg_set_bits(m, 5, 12, 0x1, r);
659}
660
661static inline char *msg_media_addr(struct tipc_msg *m)
662{
663 return (char *)&m->hdr[TIPC_MEDIA_ADDR_OFFSET];
664}
665
666/*
667 * Word 9
668 */
669static inline u32 msg_msgcnt(struct tipc_msg *m)
670{
671 return msg_bits(m, 9, 16, 0xffff);
672}
673
674static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n)
675{
676 msg_set_bits(m, 9, 16, 0xffff, n);
677}
678
679static inline u32 msg_bcast_tag(struct tipc_msg *m)
680{
681 return msg_bits(m, 9, 16, 0xffff);
682}
683
684static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n)
685{
686 msg_set_bits(m, 9, 16, 0xffff, n);
687}
688
689static inline u32 msg_max_pkt(struct tipc_msg *m)
690{
691 return msg_bits(m, 9, 16, 0xffff) * 4;
692}
693
694static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
695{
696 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
697}
698
699static inline u32 msg_link_tolerance(struct tipc_msg *m)
700{
701 return msg_bits(m, 9, 0, 0xffff);
702}
703
704static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
705{
706 msg_set_bits(m, 9, 0, 0xffff, n);
707}
708
709u32 tipc_msg_tot_importance(struct tipc_msg *m);
710void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, u32 hsize,
711 u32 destnode);
712int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect,
713 unsigned int len, int max_size, struct sk_buff **buf);
714#endif