Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/msg.h: Include file for TIPC message header routines | |
c4307285 | 3 | * |
cf2157f8 | 4 | * Copyright (c) 2000-2007, 2014-2015 Ericsson AB |
741de3e9 | 5 | * Copyright (c) 2005-2008, 2010-2011, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
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. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
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 | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
37 | #ifndef _TIPC_MSG_H | |
38 | #define _TIPC_MSG_H | |
39 | ||
1da46568 | 40 | #include <linux/tipc.h> |
b97bf3fd | 41 | |
cc4c4353 AS |
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 | */ | |
b97bf3fd | 47 | #define TIPC_VERSION 2 |
c637c103 | 48 | struct plist; |
06d82c91 | 49 | |
d265fef6 | 50 | /* |
cc4c4353 AS |
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 | */ | |
e3eea1eb JPM |
57 | #define TIPC_SYSTEM_IMPORTANCE 4 |
58 | ||
cc4c4353 AS |
59 | |
60 | /* | |
61 | * Payload message types | |
d265fef6 | 62 | */ |
d265fef6 AS |
63 | #define TIPC_CONN_MSG 0 |
64 | #define TIPC_MCAST_MSG 1 | |
65 | #define TIPC_NAMED_MSG 2 | |
66 | #define TIPC_DIRECT_MSG 3 | |
67 | ||
e3eea1eb JPM |
68 | /* |
69 | * Internal message users | |
70 | */ | |
71 | #define BCAST_PROTOCOL 5 | |
72 | #define MSG_BUNDLER 6 | |
73 | #define LINK_PROTOCOL 7 | |
74 | #define CONN_MANAGER 8 | |
dff29b1a | 75 | #define TUNNEL_PROTOCOL 10 |
e3eea1eb JPM |
76 | #define NAME_DISTRIBUTOR 11 |
77 | #define MSG_FRAGMENTER 12 | |
78 | #define LINK_CONFIG 13 | |
79 | #define SOCK_WAKEUP 14 /* pseudo user */ | |
80 | ||
cc4c4353 AS |
81 | /* |
82 | * Message header sizes | |
83 | */ | |
741d9eb7 AS |
84 | #define SHORT_H_SIZE 24 /* In-cluster basic payload message */ |
85 | #define BASIC_H_SIZE 32 /* Basic payload message */ | |
86 | #define NAMED_H_SIZE 40 /* Named payload message */ | |
87 | #define MCAST_H_SIZE 44 /* Multicast payload message */ | |
06d82c91 AS |
88 | #define INT_H_SIZE 40 /* Internal messages */ |
89 | #define MIN_H_SIZE 24 /* Smallest legal TIPC header size */ | |
90 | #define MAX_H_SIZE 60 /* Largest possible TIPC header size */ | |
91 | ||
b97bf3fd | 92 | #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE) |
b97bf3fd | 93 | |
91e2eb56 | 94 | #define TIPC_MEDIA_INFO_OFFSET 5 |
3d749a6a | 95 | |
859fc7c0 YX |
96 | /** |
97 | * TIPC message buffer code | |
98 | * | |
99 | * TIPC message buffer headroom reserves space for the worst-case | |
100 | * link-level device header (in case the message is sent off-node). | |
101 | * | |
102 | * Note: Headroom should be a multiple of 4 to ensure the TIPC header fields | |
103 | * are word aligned for quicker access | |
104 | */ | |
d0f91938 | 105 | #define BUF_HEADROOM (LL_MAX_HEADER + 48) |
859fc7c0 YX |
106 | |
107 | struct tipc_skb_cb { | |
108 | void *handle; | |
109 | struct sk_buff *tail; | |
cf2157f8 | 110 | bool validated; |
859fc7c0 YX |
111 | bool wakeup_pending; |
112 | bool bundling; | |
113 | u16 chain_sz; | |
114 | u16 chain_imp; | |
115 | }; | |
116 | ||
117 | #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0])) | |
118 | ||
d265fef6 AS |
119 | struct tipc_msg { |
120 | __be32 hdr[15]; | |
121 | }; | |
c4307285 | 122 | |
859fc7c0 YX |
123 | static inline struct tipc_msg *buf_msg(struct sk_buff *skb) |
124 | { | |
125 | return (struct tipc_msg *)skb->data; | |
126 | } | |
127 | ||
d265fef6 AS |
128 | static inline u32 msg_word(struct tipc_msg *m, u32 pos) |
129 | { | |
130 | return ntohl(m->hdr[pos]); | |
131 | } | |
b97bf3fd PL |
132 | |
133 | static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val) | |
134 | { | |
135 | m->hdr[w] = htonl(val); | |
136 | } | |
137 | ||
d265fef6 AS |
138 | static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask) |
139 | { | |
140 | return (msg_word(m, w) >> pos) & mask; | |
141 | } | |
142 | ||
b97bf3fd PL |
143 | static inline void msg_set_bits(struct tipc_msg *m, u32 w, |
144 | u32 pos, u32 mask, u32 val) | |
145 | { | |
1f9eda7e | 146 | val = (val & mask) << pos; |
becf3da2 AV |
147 | mask = mask << pos; |
148 | m->hdr[w] &= ~htonl(mask); | |
149 | m->hdr[w] |= htonl(val); | |
b97bf3fd PL |
150 | } |
151 | ||
40aecb1b AS |
152 | static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b) |
153 | { | |
154 | u32 temp = msg->hdr[a]; | |
155 | ||
156 | msg->hdr[a] = msg->hdr[b]; | |
157 | msg->hdr[b] = temp; | |
158 | } | |
159 | ||
c4307285 | 160 | /* |
b97bf3fd PL |
161 | * Word 0 |
162 | */ | |
b97bf3fd PL |
163 | static inline u32 msg_version(struct tipc_msg *m) |
164 | { | |
165 | return msg_bits(m, 0, 29, 7); | |
166 | } | |
167 | ||
c4307285 | 168 | static inline void msg_set_version(struct tipc_msg *m) |
b97bf3fd | 169 | { |
37695420 | 170 | msg_set_bits(m, 0, 29, 7, TIPC_VERSION); |
b97bf3fd PL |
171 | } |
172 | ||
173 | static inline u32 msg_user(struct tipc_msg *m) | |
174 | { | |
175 | return msg_bits(m, 0, 25, 0xf); | |
176 | } | |
177 | ||
178 | static inline u32 msg_isdata(struct tipc_msg *m) | |
179 | { | |
a02cec21 | 180 | return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE; |
b97bf3fd PL |
181 | } |
182 | ||
c4307285 | 183 | static inline void msg_set_user(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
184 | { |
185 | msg_set_bits(m, 0, 25, 0xf, n); | |
186 | } | |
187 | ||
d265fef6 AS |
188 | static inline u32 msg_hdr_sz(struct tipc_msg *m) |
189 | { | |
190 | return msg_bits(m, 0, 21, 0xf) << 2; | |
191 | } | |
192 | ||
0e65967e | 193 | static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
194 | { |
195 | msg_set_bits(m, 0, 21, 0xf, n>>2); | |
196 | } | |
197 | ||
d265fef6 AS |
198 | static inline u32 msg_size(struct tipc_msg *m) |
199 | { | |
200 | return msg_bits(m, 0, 0, 0x1ffff); | |
201 | } | |
202 | ||
203 | static inline u32 msg_data_sz(struct tipc_msg *m) | |
204 | { | |
205 | return msg_size(m) - msg_hdr_sz(m); | |
206 | } | |
207 | ||
c4307285 | 208 | static inline int msg_non_seq(struct tipc_msg *m) |
b97bf3fd PL |
209 | { |
210 | return msg_bits(m, 0, 20, 1); | |
211 | } | |
212 | ||
40aecb1b | 213 | static inline void msg_set_non_seq(struct tipc_msg *m, u32 n) |
b97bf3fd | 214 | { |
40aecb1b | 215 | msg_set_bits(m, 0, 20, 1, n); |
b97bf3fd PL |
216 | } |
217 | ||
c4307285 | 218 | static inline int msg_dest_droppable(struct tipc_msg *m) |
b97bf3fd PL |
219 | { |
220 | return msg_bits(m, 0, 19, 1); | |
221 | } | |
222 | ||
c4307285 | 223 | static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
224 | { |
225 | msg_set_bits(m, 0, 19, 1, d); | |
226 | } | |
227 | ||
c4307285 | 228 | static inline int msg_src_droppable(struct tipc_msg *m) |
b97bf3fd PL |
229 | { |
230 | return msg_bits(m, 0, 18, 1); | |
231 | } | |
232 | ||
c4307285 | 233 | static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
234 | { |
235 | msg_set_bits(m, 0, 18, 1, d); | |
236 | } | |
237 | ||
238 | static inline void msg_set_size(struct tipc_msg *m, u32 sz) | |
239 | { | |
240 | m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz); | |
241 | } | |
242 | ||
3127a020 JPM |
243 | static inline unchar *msg_data(struct tipc_msg *m) |
244 | { | |
245 | return ((unchar *)m) + msg_hdr_sz(m); | |
246 | } | |
247 | ||
248 | static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m) | |
249 | { | |
250 | return (struct tipc_msg *)msg_data(m); | |
251 | } | |
b97bf3fd | 252 | |
c4307285 | 253 | /* |
b97bf3fd PL |
254 | * Word 1 |
255 | */ | |
d265fef6 AS |
256 | static inline u32 msg_type(struct tipc_msg *m) |
257 | { | |
258 | return msg_bits(m, 1, 29, 0x7); | |
259 | } | |
260 | ||
c4307285 | 261 | static inline void msg_set_type(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
262 | { |
263 | msg_set_bits(m, 1, 29, 0x7, n); | |
264 | } | |
265 | ||
d265fef6 AS |
266 | static inline u32 msg_named(struct tipc_msg *m) |
267 | { | |
268 | return msg_type(m) == TIPC_NAMED_MSG; | |
269 | } | |
270 | ||
271 | static inline u32 msg_mcast(struct tipc_msg *m) | |
272 | { | |
273 | return msg_type(m) == TIPC_MCAST_MSG; | |
274 | } | |
275 | ||
276 | static inline u32 msg_connected(struct tipc_msg *m) | |
277 | { | |
278 | return msg_type(m) == TIPC_CONN_MSG; | |
279 | } | |
280 | ||
281 | static inline u32 msg_errcode(struct tipc_msg *m) | |
282 | { | |
283 | return msg_bits(m, 1, 25, 0xf); | |
284 | } | |
285 | ||
c4307285 | 286 | static inline void msg_set_errcode(struct tipc_msg *m, u32 err) |
b97bf3fd PL |
287 | { |
288 | msg_set_bits(m, 1, 25, 0xf, err); | |
289 | } | |
290 | ||
c4307285 | 291 | static inline u32 msg_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
292 | { |
293 | return msg_bits(m, 1, 21, 0xf); | |
294 | } | |
295 | ||
c4307285 | 296 | static inline void msg_incr_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
297 | { |
298 | msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1); | |
299 | } | |
300 | ||
c4307285 | 301 | static inline void msg_reset_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
302 | { |
303 | msg_set_bits(m, 1, 21, 0xf, 0); | |
304 | } | |
305 | ||
306 | static inline u32 msg_lookup_scope(struct tipc_msg *m) | |
307 | { | |
308 | return msg_bits(m, 1, 19, 0x3); | |
309 | } | |
310 | ||
c4307285 | 311 | static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
312 | { |
313 | msg_set_bits(m, 1, 19, 0x3, n); | |
314 | } | |
315 | ||
e4bf4f76 | 316 | static inline u16 msg_bcast_ack(struct tipc_msg *m) |
b97bf3fd PL |
317 | { |
318 | return msg_bits(m, 1, 0, 0xffff); | |
319 | } | |
320 | ||
e4bf4f76 | 321 | static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
322 | { |
323 | msg_set_bits(m, 1, 0, 0xffff, n); | |
324 | } | |
325 | ||
326 | ||
c4307285 | 327 | /* |
b97bf3fd PL |
328 | * Word 2 |
329 | */ | |
e4bf4f76 | 330 | static inline u16 msg_ack(struct tipc_msg *m) |
b97bf3fd PL |
331 | { |
332 | return msg_bits(m, 2, 16, 0xffff); | |
333 | } | |
334 | ||
e4bf4f76 | 335 | static inline void msg_set_ack(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
336 | { |
337 | msg_set_bits(m, 2, 16, 0xffff, n); | |
338 | } | |
339 | ||
e4bf4f76 | 340 | static inline u16 msg_seqno(struct tipc_msg *m) |
b97bf3fd PL |
341 | { |
342 | return msg_bits(m, 2, 0, 0xffff); | |
343 | } | |
344 | ||
e4bf4f76 | 345 | static inline void msg_set_seqno(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
346 | { |
347 | msg_set_bits(m, 2, 0, 0xffff, n); | |
348 | } | |
349 | ||
c4307285 | 350 | /* |
b97bf3fd PL |
351 | * Words 3-10 |
352 | */ | |
e3eea1eb JPM |
353 | static inline u32 msg_importance(struct tipc_msg *m) |
354 | { | |
f21e897e JPM |
355 | int usr = msg_user(m); |
356 | ||
357 | if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m))) | |
358 | return usr; | |
359 | if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)) | |
e3eea1eb | 360 | return msg_bits(m, 5, 13, 0x7); |
e3eea1eb JPM |
361 | return TIPC_SYSTEM_IMPORTANCE; |
362 | } | |
363 | ||
364 | static inline void msg_set_importance(struct tipc_msg *m, u32 i) | |
365 | { | |
f21e897e JPM |
366 | int usr = msg_user(m); |
367 | ||
368 | if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))) | |
e3eea1eb | 369 | msg_set_bits(m, 5, 13, 0x7, i); |
f21e897e | 370 | else if (i < TIPC_SYSTEM_IMPORTANCE) |
e3eea1eb JPM |
371 | msg_set_user(m, i); |
372 | else | |
373 | pr_warn("Trying to set illegal importance in message\n"); | |
374 | } | |
375 | ||
d265fef6 AS |
376 | static inline u32 msg_prevnode(struct tipc_msg *m) |
377 | { | |
378 | return msg_word(m, 3); | |
379 | } | |
380 | ||
c4307285 | 381 | static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
382 | { |
383 | msg_set_word(m, 3, a); | |
384 | } | |
385 | ||
d265fef6 AS |
386 | static inline u32 msg_origport(struct tipc_msg *m) |
387 | { | |
3127a020 JPM |
388 | if (msg_user(m) == MSG_FRAGMENTER) |
389 | m = msg_get_wrapped(m); | |
d265fef6 AS |
390 | return msg_word(m, 4); |
391 | } | |
392 | ||
c4307285 | 393 | static inline void msg_set_origport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
394 | { |
395 | msg_set_word(m, 4, p); | |
396 | } | |
397 | ||
d265fef6 AS |
398 | static inline u32 msg_destport(struct tipc_msg *m) |
399 | { | |
400 | return msg_word(m, 5); | |
401 | } | |
402 | ||
c4307285 | 403 | static inline void msg_set_destport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
404 | { |
405 | msg_set_word(m, 5, p); | |
406 | } | |
407 | ||
d265fef6 AS |
408 | static inline u32 msg_mc_netid(struct tipc_msg *m) |
409 | { | |
410 | return msg_word(m, 5); | |
411 | } | |
412 | ||
c4307285 | 413 | static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
414 | { |
415 | msg_set_word(m, 5, p); | |
416 | } | |
417 | ||
d265fef6 AS |
418 | static inline int msg_short(struct tipc_msg *m) |
419 | { | |
741d9eb7 | 420 | return msg_hdr_sz(m) == SHORT_H_SIZE; |
d265fef6 AS |
421 | } |
422 | ||
423 | static inline u32 msg_orignode(struct tipc_msg *m) | |
424 | { | |
425 | if (likely(msg_short(m))) | |
426 | return msg_prevnode(m); | |
427 | return msg_word(m, 6); | |
428 | } | |
429 | ||
c4307285 | 430 | static inline void msg_set_orignode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
431 | { |
432 | msg_set_word(m, 6, a); | |
433 | } | |
434 | ||
d265fef6 AS |
435 | static inline u32 msg_destnode(struct tipc_msg *m) |
436 | { | |
437 | return msg_word(m, 7); | |
438 | } | |
439 | ||
c4307285 | 440 | static inline void msg_set_destnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
441 | { |
442 | msg_set_word(m, 7, a); | |
443 | } | |
444 | ||
d265fef6 AS |
445 | static inline u32 msg_nametype(struct tipc_msg *m) |
446 | { | |
447 | return msg_word(m, 8); | |
448 | } | |
449 | ||
c4307285 | 450 | static inline void msg_set_nametype(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
451 | { |
452 | msg_set_word(m, 8, n); | |
453 | } | |
454 | ||
d265fef6 AS |
455 | static inline u32 msg_nameinst(struct tipc_msg *m) |
456 | { | |
457 | return msg_word(m, 9); | |
458 | } | |
459 | ||
460 | static inline u32 msg_namelower(struct tipc_msg *m) | |
461 | { | |
462 | return msg_nameinst(m); | |
463 | } | |
464 | ||
c4307285 | 465 | static inline void msg_set_namelower(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
466 | { |
467 | msg_set_word(m, 9, n); | |
468 | } | |
469 | ||
c4307285 | 470 | static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
471 | { |
472 | msg_set_namelower(m, n); | |
473 | } | |
474 | ||
d265fef6 AS |
475 | static inline u32 msg_nameupper(struct tipc_msg *m) |
476 | { | |
477 | return msg_word(m, 10); | |
478 | } | |
479 | ||
c4307285 | 480 | static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
481 | { |
482 | msg_set_word(m, 10, n); | |
483 | } | |
484 | ||
b97bf3fd | 485 | /* |
cc4c4353 AS |
486 | * Constants and routines used to read and write TIPC internal message headers |
487 | */ | |
b97bf3fd | 488 | |
c4307285 | 489 | /* |
cc4c4353 | 490 | * Connection management protocol message types |
b97bf3fd | 491 | */ |
b97bf3fd PL |
492 | #define CONN_PROBE 0 |
493 | #define CONN_PROBE_REPLY 1 | |
494 | #define CONN_ACK 2 | |
495 | ||
c4307285 | 496 | /* |
cc4c4353 | 497 | * Name distributor message types |
b97bf3fd | 498 | */ |
b97bf3fd PL |
499 | #define PUBLICATION 0 |
500 | #define WITHDRAWAL 1 | |
501 | ||
92138d1f AS |
502 | /* |
503 | * Segmentation message types | |
504 | */ | |
92138d1f AS |
505 | #define FIRST_FRAGMENT 0 |
506 | #define FRAGMENT 1 | |
507 | #define LAST_FRAGMENT 2 | |
508 | ||
509 | /* | |
510 | * Link management protocol message types | |
511 | */ | |
92138d1f AS |
512 | #define STATE_MSG 0 |
513 | #define RESET_MSG 1 | |
514 | #define ACTIVATE_MSG 2 | |
515 | ||
516 | /* | |
517 | * Changeover tunnel message types | |
518 | */ | |
dff29b1a JPM |
519 | #define SYNCH_MSG 0 |
520 | #define FAILOVER_MSG 1 | |
92138d1f AS |
521 | |
522 | /* | |
523 | * Config protocol message types | |
524 | */ | |
92138d1f AS |
525 | #define DSC_REQ_MSG 0 |
526 | #define DSC_RESP_MSG 1 | |
527 | ||
c4307285 | 528 | /* |
b97bf3fd PL |
529 | * Word 1 |
530 | */ | |
b97bf3fd PL |
531 | static inline u32 msg_seq_gap(struct tipc_msg *m) |
532 | { | |
bd784533 | 533 | return msg_bits(m, 1, 16, 0x1fff); |
b97bf3fd PL |
534 | } |
535 | ||
536 | static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) | |
537 | { | |
bd784533 | 538 | msg_set_bits(m, 1, 16, 0x1fff, n); |
b97bf3fd PL |
539 | } |
540 | ||
fc0eea69 AS |
541 | static inline u32 msg_node_sig(struct tipc_msg *m) |
542 | { | |
543 | return msg_bits(m, 1, 0, 0xffff); | |
544 | } | |
545 | ||
546 | static inline void msg_set_node_sig(struct tipc_msg *m, u32 n) | |
547 | { | |
548 | msg_set_bits(m, 1, 0, 0xffff, n); | |
549 | } | |
550 | ||
7764d6e8 JPM |
551 | static inline u32 msg_node_capabilities(struct tipc_msg *m) |
552 | { | |
553 | return msg_bits(m, 1, 15, 0x1fff); | |
554 | } | |
555 | ||
556 | static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n) | |
557 | { | |
558 | msg_set_bits(m, 1, 15, 0x1fff, n); | |
559 | } | |
560 | ||
8b4ed863 JPM |
561 | static inline bool msg_dup(struct tipc_msg *m) |
562 | { | |
dff29b1a | 563 | if (likely(msg_user(m) != TUNNEL_PROTOCOL)) |
8b4ed863 | 564 | return false; |
dff29b1a | 565 | if (msg_type(m) != SYNCH_MSG) |
8b4ed863 JPM |
566 | return false; |
567 | return true; | |
568 | } | |
b97bf3fd | 569 | |
c4307285 | 570 | /* |
b97bf3fd PL |
571 | * Word 2 |
572 | */ | |
b97bf3fd PL |
573 | static inline u32 msg_dest_domain(struct tipc_msg *m) |
574 | { | |
575 | return msg_word(m, 2); | |
576 | } | |
577 | ||
c4307285 | 578 | static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
579 | { |
580 | msg_set_word(m, 2, n); | |
581 | } | |
582 | ||
583 | static inline u32 msg_bcgap_after(struct tipc_msg *m) | |
584 | { | |
585 | return msg_bits(m, 2, 16, 0xffff); | |
586 | } | |
587 | ||
588 | static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) | |
589 | { | |
590 | msg_set_bits(m, 2, 16, 0xffff, n); | |
591 | } | |
592 | ||
593 | static inline u32 msg_bcgap_to(struct tipc_msg *m) | |
594 | { | |
595 | return msg_bits(m, 2, 0, 0xffff); | |
596 | } | |
597 | ||
c4307285 | 598 | static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
599 | { |
600 | msg_set_bits(m, 2, 0, 0xffff, n); | |
601 | } | |
602 | ||
603 | ||
c4307285 | 604 | /* |
b97bf3fd PL |
605 | * Word 4 |
606 | */ | |
b97bf3fd PL |
607 | static inline u32 msg_last_bcast(struct tipc_msg *m) |
608 | { | |
609 | return msg_bits(m, 4, 16, 0xffff); | |
610 | } | |
611 | ||
612 | static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) | |
613 | { | |
614 | msg_set_bits(m, 4, 16, 0xffff, n); | |
615 | } | |
616 | ||
b97bf3fd PL |
617 | static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) |
618 | { | |
619 | msg_set_bits(m, 4, 16, 0xffff, n); | |
620 | } | |
621 | ||
622 | ||
623 | static inline u32 msg_next_sent(struct tipc_msg *m) | |
624 | { | |
625 | return msg_bits(m, 4, 0, 0xffff); | |
626 | } | |
627 | ||
628 | static inline void msg_set_next_sent(struct tipc_msg *m, u32 n) | |
629 | { | |
630 | msg_set_bits(m, 4, 0, 0xffff, n); | |
631 | } | |
632 | ||
b97bf3fd PL |
633 | static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n) |
634 | { | |
635 | msg_set_bits(m, 4, 0, 0xffff, n); | |
636 | } | |
637 | ||
638 | static inline u32 msg_bc_netid(struct tipc_msg *m) | |
639 | { | |
640 | return msg_word(m, 4); | |
641 | } | |
642 | ||
643 | static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) | |
644 | { | |
645 | msg_set_word(m, 4, id); | |
646 | } | |
647 | ||
648 | static inline u32 msg_link_selector(struct tipc_msg *m) | |
649 | { | |
650 | return msg_bits(m, 4, 0, 1); | |
651 | } | |
652 | ||
653 | static inline void msg_set_link_selector(struct tipc_msg *m, u32 n) | |
654 | { | |
7eb878ed | 655 | msg_set_bits(m, 4, 0, 1, n); |
b97bf3fd PL |
656 | } |
657 | ||
c4307285 | 658 | /* |
b97bf3fd PL |
659 | * Word 5 |
660 | */ | |
b97bf3fd PL |
661 | static inline u32 msg_session(struct tipc_msg *m) |
662 | { | |
663 | return msg_bits(m, 5, 16, 0xffff); | |
664 | } | |
665 | ||
666 | static inline void msg_set_session(struct tipc_msg *m, u32 n) | |
667 | { | |
668 | msg_set_bits(m, 5, 16, 0xffff, n); | |
669 | } | |
670 | ||
671 | static inline u32 msg_probe(struct tipc_msg *m) | |
672 | { | |
673 | return msg_bits(m, 5, 0, 1); | |
674 | } | |
675 | ||
676 | static inline void msg_set_probe(struct tipc_msg *m, u32 val) | |
677 | { | |
7eb878ed | 678 | msg_set_bits(m, 5, 0, 1, val); |
b97bf3fd PL |
679 | } |
680 | ||
681 | static inline char msg_net_plane(struct tipc_msg *m) | |
682 | { | |
683 | return msg_bits(m, 5, 1, 7) + 'A'; | |
684 | } | |
685 | ||
686 | static inline void msg_set_net_plane(struct tipc_msg *m, char n) | |
687 | { | |
688 | msg_set_bits(m, 5, 1, 7, (n - 'A')); | |
689 | } | |
690 | ||
691 | static inline u32 msg_linkprio(struct tipc_msg *m) | |
692 | { | |
693 | return msg_bits(m, 5, 4, 0x1f); | |
694 | } | |
695 | ||
696 | static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) | |
697 | { | |
698 | msg_set_bits(m, 5, 4, 0x1f, n); | |
699 | } | |
700 | ||
701 | static inline u32 msg_bearer_id(struct tipc_msg *m) | |
702 | { | |
703 | return msg_bits(m, 5, 9, 0x7); | |
704 | } | |
705 | ||
706 | static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) | |
707 | { | |
708 | msg_set_bits(m, 5, 9, 0x7, n); | |
709 | } | |
710 | ||
711 | static inline u32 msg_redundant_link(struct tipc_msg *m) | |
712 | { | |
713 | return msg_bits(m, 5, 12, 0x1); | |
714 | } | |
715 | ||
77f167fc | 716 | static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r) |
b97bf3fd | 717 | { |
77f167fc | 718 | msg_set_bits(m, 5, 12, 0x1, r); |
b97bf3fd PL |
719 | } |
720 | ||
3d749a6a AS |
721 | static inline char *msg_media_addr(struct tipc_msg *m) |
722 | { | |
91e2eb56 | 723 | return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET]; |
3d749a6a | 724 | } |
b97bf3fd | 725 | |
c4307285 | 726 | /* |
b97bf3fd PL |
727 | * Word 9 |
728 | */ | |
b97bf3fd PL |
729 | static inline u32 msg_msgcnt(struct tipc_msg *m) |
730 | { | |
731 | return msg_bits(m, 9, 16, 0xffff); | |
732 | } | |
733 | ||
734 | static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n) | |
735 | { | |
736 | msg_set_bits(m, 9, 16, 0xffff, n); | |
737 | } | |
738 | ||
739 | static inline u32 msg_bcast_tag(struct tipc_msg *m) | |
740 | { | |
741 | return msg_bits(m, 9, 16, 0xffff); | |
742 | } | |
743 | ||
744 | static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n) | |
745 | { | |
746 | msg_set_bits(m, 9, 16, 0xffff, n); | |
747 | } | |
748 | ||
c4307285 | 749 | static inline u32 msg_max_pkt(struct tipc_msg *m) |
b97bf3fd | 750 | { |
a02cec21 | 751 | return msg_bits(m, 9, 16, 0xffff) * 4; |
b97bf3fd PL |
752 | } |
753 | ||
c4307285 | 754 | static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
755 | { |
756 | msg_set_bits(m, 9, 16, 0xffff, (n / 4)); | |
757 | } | |
758 | ||
759 | static inline u32 msg_link_tolerance(struct tipc_msg *m) | |
760 | { | |
761 | return msg_bits(m, 9, 0, 0xffff); | |
762 | } | |
763 | ||
764 | static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) | |
765 | { | |
766 | msg_set_bits(m, 9, 0, 0xffff, n); | |
767 | } | |
768 | ||
859fc7c0 | 769 | struct sk_buff *tipc_buf_acquire(u32 size); |
cf2157f8 | 770 | bool tipc_msg_validate(struct sk_buff *skb); |
c5898636 | 771 | bool tipc_msg_reverse(u32 own_addr, struct sk_buff *buf, u32 *dnode, |
34747539 | 772 | int err); |
c5898636 | 773 | void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type, |
34747539 | 774 | u32 hsize, u32 destnode); |
e3a77561 JPM |
775 | struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz, |
776 | uint data_sz, u32 dnode, u32 onode, | |
777 | u32 dport, u32 oport, int errcode); | |
37e22164 | 778 | int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf); |
05dcc5aa JPM |
779 | bool tipc_msg_bundle(struct sk_buff *bskb, struct sk_buff *skb, u32 mtu); |
780 | ||
781 | bool tipc_msg_make_bundle(struct sk_buff **skb, u32 mtu, u32 dnode); | |
c637c103 | 782 | bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos); |
c5898636 | 783 | int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, |
34747539 | 784 | int offset, int dsz, int mtu, struct sk_buff_head *list); |
e3a77561 JPM |
785 | bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, u32 *dnode, |
786 | int *err); | |
a6ca1094 | 787 | struct sk_buff *tipc_msg_reassemble(struct sk_buff_head *list); |
078bec82 | 788 | |
e4bf4f76 JPM |
789 | static inline u16 buf_seqno(struct sk_buff *skb) |
790 | { | |
791 | return msg_seqno(buf_msg(skb)); | |
792 | } | |
793 | ||
cb1b7280 JPM |
794 | /* tipc_skb_peek(): peek and reserve first buffer in list |
795 | * @list: list to be peeked in | |
796 | * Returns pointer to first buffer in list, if any | |
797 | */ | |
798 | static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list, | |
799 | spinlock_t *lock) | |
800 | { | |
801 | struct sk_buff *skb; | |
802 | ||
803 | spin_lock_bh(lock); | |
804 | skb = skb_peek(list); | |
805 | if (skb) | |
806 | skb_get(skb); | |
807 | spin_unlock_bh(lock); | |
808 | return skb; | |
809 | } | |
810 | ||
c637c103 JPM |
811 | /* tipc_skb_peek_port(): find a destination port, ignoring all destinations |
812 | * up to and including 'filter'. | |
813 | * Note: ignoring previously tried destinations minimizes the risk of | |
814 | * contention on the socket lock | |
815 | * @list: list to be peeked in | |
816 | * @filter: last destination to be ignored from search | |
817 | * Returns a destination port number, of applicable. | |
818 | */ | |
819 | static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter) | |
820 | { | |
821 | struct sk_buff *skb; | |
822 | u32 dport = 0; | |
823 | bool ignore = true; | |
824 | ||
825 | spin_lock_bh(&list->lock); | |
826 | skb_queue_walk(list, skb) { | |
827 | dport = msg_destport(buf_msg(skb)); | |
828 | if (!filter || skb_queue_is_last(list, skb)) | |
829 | break; | |
830 | if (dport == filter) | |
831 | ignore = false; | |
832 | else if (!ignore) | |
833 | break; | |
834 | } | |
835 | spin_unlock_bh(&list->lock); | |
836 | return dport; | |
837 | } | |
838 | ||
839 | /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list | |
840 | * @list: list to be unlinked from | |
841 | * @dport: selection criteria for buffer to unlink | |
842 | */ | |
843 | static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list, | |
844 | u32 dport) | |
845 | { | |
846 | struct sk_buff *_skb, *tmp, *skb = NULL; | |
847 | ||
848 | spin_lock_bh(&list->lock); | |
849 | skb_queue_walk_safe(list, _skb, tmp) { | |
850 | if (msg_destport(buf_msg(_skb)) == dport) { | |
851 | __skb_unlink(_skb, list); | |
852 | skb = _skb; | |
853 | break; | |
854 | } | |
855 | } | |
856 | spin_unlock_bh(&list->lock); | |
857 | return skb; | |
858 | } | |
859 | ||
860 | /* tipc_skb_queue_tail(): add buffer to tail of list; | |
861 | * @list: list to be appended to | |
862 | * @skb: buffer to append. Always appended | |
863 | * @dport: the destination port of the buffer | |
864 | * returns true if dport differs from previous destination | |
865 | */ | |
866 | static inline bool tipc_skb_queue_tail(struct sk_buff_head *list, | |
867 | struct sk_buff *skb, u32 dport) | |
868 | { | |
869 | struct sk_buff *_skb = NULL; | |
870 | bool rv = false; | |
871 | ||
872 | spin_lock_bh(&list->lock); | |
873 | _skb = skb_peek_tail(list); | |
874 | if (!_skb || (msg_destport(buf_msg(_skb)) != dport) || | |
875 | (skb_queue_len(list) > 32)) | |
876 | rv = true; | |
877 | __skb_queue_tail(list, skb); | |
878 | spin_unlock_bh(&list->lock); | |
879 | return rv; | |
880 | } | |
881 | ||
b97bf3fd | 882 | #endif |