net/tipc/msg.h

   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 #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
  96 struct tipc_msg {
  97         __be32 hdr[15];
  98 };
  99
 100
 101 static inline u32 msg_word(struct tipc_msg *m, u32 pos)
 102 {
 103         return ntohl(m->hdr[pos]);
 104 }
 105
 106 static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
 107 {
 108         m->hdr[w] = htonl(val);
 109 }
 110
 111 static 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
 116 static 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
 125 static 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
 137 static inline u32 msg_version(struct tipc_msg *m)
 138 {
 139         return msg_bits(m, 0, 29, 7);
 140 }
 141
 142 static inline void msg_set_version(struct tipc_msg *m)
 143 {
 144         msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
 145 }
 146
 147 static inline u32 msg_user(struct tipc_msg *m)
 148 {
 149         return msg_bits(m, 0, 25, 0xf);
 150 }
 151
 152 static inline u32 msg_isdata(struct tipc_msg *m)
 153 {
 154         return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
 155 }
 156
 157 static inline void msg_set_user(struct tipc_msg *m, u32 n)
 158 {
 159         msg_set_bits(m, 0, 25, 0xf, n);
 160 }
 161
 162 static inline u32 msg_importance(struct tipc_msg *m)
 163 {
 164         return msg_bits(m, 0, 25, 0xf);
 165 }
 166
 167 static inline void msg_set_importance(struct tipc_msg *m, u32 i)
 168 {
 169         msg_set_user(m, i);
 170 }
 171
 172 static inline u32 msg_hdr_sz(struct tipc_msg *m)
 173 {
 174         return msg_bits(m, 0, 21, 0xf) << 2;
 175 }
 176
 177 static 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
 182 static inline u32 msg_size(struct tipc_msg *m)
 183 {
 184         return msg_bits(m, 0, 0, 0x1ffff);
 185 }
 186
 187 static inline u32 msg_data_sz(struct tipc_msg *m)
 188 {
 189         return msg_size(m) - msg_hdr_sz(m);
 190 }
 191
 192 static inline int msg_non_seq(struct tipc_msg *m)
 193 {
 194         return msg_bits(m, 0, 20, 1);
 195 }
 196
 197 static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
 198 {
 199         msg_set_bits(m, 0, 20, 1, n);
 200 }
 201
 202 static inline int msg_dest_droppable(struct tipc_msg *m)
 203 {
 204         return msg_bits(m, 0, 19, 1);
 205 }
 206
 207 static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
 208 {
 209         msg_set_bits(m, 0, 19, 1, d);
 210 }
 211
 212 static inline int msg_src_droppable(struct tipc_msg *m)
 213 {
 214         return msg_bits(m, 0, 18, 1);
 215 }
 216
 217 static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
 218 {
 219         msg_set_bits(m, 0, 18, 1, d);
 220 }
 221
 222 static 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
 232 static inline u32 msg_type(struct tipc_msg *m)
 233 {
 234         return msg_bits(m, 1, 29, 0x7);
 235 }
 236
 237 static inline void msg_set_type(struct tipc_msg *m, u32 n)
 238 {
 239         msg_set_bits(m, 1, 29, 0x7, n);
 240 }
 241
 242 static inline u32 msg_named(struct tipc_msg *m)
 243 {
 244         return msg_type(m) == TIPC_NAMED_MSG;
 245 }
 246
 247 static inline u32 msg_mcast(struct tipc_msg *m)
 248 {
 249         return msg_type(m) == TIPC_MCAST_MSG;
 250 }
 251
 252 static inline u32 msg_connected(struct tipc_msg *m)
 253 {
 254         return msg_type(m) == TIPC_CONN_MSG;
 255 }
 256
 257 static inline u32 msg_errcode(struct tipc_msg *m)
 258 {
 259         return msg_bits(m, 1, 25, 0xf);
 260 }
 261
 262 static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
 263 {
 264         msg_set_bits(m, 1, 25, 0xf, err);
 265 }
 266
 267 static inline u32 msg_reroute_cnt(struct tipc_msg *m)
 268 {
 269         return msg_bits(m, 1, 21, 0xf);
 270 }
 271
 272 static 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
 277 static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
 278 {
 279         msg_set_bits(m, 1, 21, 0xf, 0);
 280 }
 281
 282 static inline u32 msg_lookup_scope(struct tipc_msg *m)
 283 {
 284         return msg_bits(m, 1, 19, 0x3);
 285 }
 286
 287 static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
 288 {
 289         msg_set_bits(m, 1, 19, 0x3, n);
 290 }
 291
 292 static inline u32 msg_bcast_ack(struct tipc_msg *m)
 293 {
 294         return msg_bits(m, 1, 0, 0xffff);
 295 }
 296
 297 static 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
 307 static inline u32 msg_ack(struct tipc_msg *m)
 308 {
 309         return msg_bits(m, 2, 16, 0xffff);
 310 }
 311
 312 static inline void msg_set_ack(struct tipc_msg *m, u32 n)
 313 {
 314         msg_set_bits(m, 2, 16, 0xffff, n);
 315 }
 316
 317 static inline u32 msg_seqno(struct tipc_msg *m)
 318 {
 319         return msg_bits(m, 2, 0, 0xffff);
 320 }
 321
 322 static 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
 337 static inline u32 msg_destnode_cache(struct tipc_msg *m)
 338 {
 339         return m->hdr[2];
 340 }
 341
 342 static 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
 352 static inline u32 msg_prevnode(struct tipc_msg *m)
 353 {
 354         return msg_word(m, 3);
 355 }
 356
 357 static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
 358 {
 359         msg_set_word(m, 3, a);
 360 }
 361
 362 static inline u32 msg_origport(struct tipc_msg *m)
 363 {
 364         return msg_word(m, 4);
 365 }
 366
 367 static inline void msg_set_origport(struct tipc_msg *m, u32 p)
 368 {
 369         msg_set_word(m, 4, p);
 370 }
 371
 372 static inline u32 msg_destport(struct tipc_msg *m)
 373 {
 374         return msg_word(m, 5);
 375 }
 376
 377 static inline void msg_set_destport(struct tipc_msg *m, u32 p)
 378 {
 379         msg_set_word(m, 5, p);
 380 }
 381
 382 static inline u32 msg_mc_netid(struct tipc_msg *m)
 383 {
 384         return msg_word(m, 5);
 385 }
 386
 387 static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
 388 {
 389         msg_set_word(m, 5, p);
 390 }
 391
 392 static inline int msg_short(struct tipc_msg *m)
 393 {
 394         return msg_hdr_sz(m) == 24;
 395 }
 396
 397 static 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
 404 static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
 405 {
 406         msg_set_word(m, 6, a);
 407 }
 408
 409 static inline u32 msg_destnode(struct tipc_msg *m)
 410 {
 411         return msg_word(m, 7);
 412 }
 413
 414 static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
 415 {
 416         msg_set_word(m, 7, a);
 417 }
 418
 419 static inline int msg_is_dest(struct tipc_msg *m, u32 d)
 420 {
 421         return msg_short(m) || (msg_destnode(m) == d);
 422 }
 423
 424 static inline u32 msg_nametype(struct tipc_msg *m)
 425 {
 426         return msg_word(m, 8);
 427 }
 428
 429 static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
 430 {
 431         msg_set_word(m, 8, n);
 432 }
 433
 434 static inline u32 msg_nameinst(struct tipc_msg *m)
 435 {
 436         return msg_word(m, 9);
 437 }
 438
 439 static inline u32 msg_namelower(struct tipc_msg *m)
 440 {
 441         return msg_nameinst(m);
 442 }
 443
 444 static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
 445 {
 446         msg_set_word(m, 9, n);
 447 }
 448
 449 static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
 450 {
 451         msg_set_namelower(m, n);
 452 }
 453
 454 static inline u32 msg_nameupper(struct tipc_msg *m)
 455 {
 456         return msg_word(m, 10);
 457 }
 458
 459 static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
 460 {
 461         msg_set_word(m, 10, n);
 462 }
 463
 464 static inline unchar *msg_data(struct tipc_msg *m)
 465 {
 466         return ((unchar *)m) + msg_hdr_sz(m);
 467 }
 468
 469 static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
 470 {
 471         return (struct tipc_msg *)msg_data(m);
 472 }
 473
 474
 475 /*
 476                 TIPC internal message header format, version 2
 477
 478        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
 479       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 480    w0:|vers |msg usr|hdr sz |n|resrv|            packet size          |
 481       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 482    w1:|m typ|      sequence gap       |       broadcast ack no        |
 483       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 484    w2:| link level ack no/bc_gap_from |     seq no / bcast_gap_to     |
 485       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 486    w3:|                       previous node                           |
 487       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 488    w4:|  next sent broadcast/fragm no | next sent pkt/ fragm msg no   |
 489       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 490    w5:|          session no           |rsv=0|r|berid|link prio|netpl|p|
 491       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 492    w6:|                      originating node                         |
 493       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 494    w7:|                      destination node                         |
 495       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 496    w8:|                   transport sequence number                   |
 497       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 498    w9:|   msg count / bcast tag       |       link tolerance          |
 499       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 500       \                                                               \
 501       /                     User Specific Data                        /
 502       \                                                               \
 503       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 504
 505       NB: CONN_MANAGER use data message format. LINK_CONFIG has own format.
 506 */
 507
 508 /*
 509  * Internal users
 510  */
 511
 512 #define  BCAST_PROTOCOL       5
 513 #define  MSG_BUNDLER          6
 514 #define  LINK_PROTOCOL        7
 515 #define  CONN_MANAGER         8
 516 #define  ROUTE_DISTRIBUTOR    9         /* obsoleted */
 517 #define  CHANGEOVER_PROTOCOL  10
 518 #define  NAME_DISTRIBUTOR     11
 519 #define  MSG_FRAGMENTER       12
 520 #define  LINK_CONFIG          13
 521
 522 /*
 523  *  Connection management protocol messages
 524  */
 525
 526 #define CONN_PROBE        0
 527 #define CONN_PROBE_REPLY  1
 528 #define CONN_ACK          2
 529
 530 /*
 531  * Name distributor messages
 532  */
 533
 534 #define PUBLICATION       0
 535 #define WITHDRAWAL        1
 536
 537
 538 /*
 539  * Word 1
 540  */
 541
 542 static inline u32 msg_seq_gap(struct tipc_msg *m)
 543 {
 544         return msg_bits(m, 1, 16, 0x1fff);
 545 }
 546
 547 static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
 548 {
 549         msg_set_bits(m, 1, 16, 0x1fff, n);
 550 }
 551
 552
 553 /*
 554  * Word 2
 555  */
 556
 557 static inline u32 msg_dest_domain(struct tipc_msg *m)
 558 {
 559         return msg_word(m, 2);
 560 }
 561
 562 static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
 563 {
 564         msg_set_word(m, 2, n);
 565 }
 566
 567 static inline u32 msg_bcgap_after(struct tipc_msg *m)
 568 {
 569         return msg_bits(m, 2, 16, 0xffff);
 570 }
 571
 572 static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
 573 {
 574         msg_set_bits(m, 2, 16, 0xffff, n);
 575 }
 576
 577 static inline u32 msg_bcgap_to(struct tipc_msg *m)
 578 {
 579         return msg_bits(m, 2, 0, 0xffff);
 580 }
 581
 582 static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
 583 {
 584         msg_set_bits(m, 2, 0, 0xffff, n);
 585 }
 586
 587
 588 /*
 589  * Word 4
 590  */
 591
 592 static inline u32 msg_last_bcast(struct tipc_msg *m)
 593 {
 594         return msg_bits(m, 4, 16, 0xffff);
 595 }
 596
 597 static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
 598 {
 599         msg_set_bits(m, 4, 16, 0xffff, n);
 600 }
 601
 602
 603 static inline u32 msg_fragm_no(struct tipc_msg *m)
 604 {
 605         return msg_bits(m, 4, 16, 0xffff);
 606 }
 607
 608 static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
 609 {
 610         msg_set_bits(m, 4, 16, 0xffff, n);
 611 }
 612
 613
 614 static inline u32 msg_next_sent(struct tipc_msg *m)
 615 {
 616         return msg_bits(m, 4, 0, 0xffff);
 617 }
 618
 619 static inline void msg_set_next_sent(struct tipc_msg *m, u32 n)
 620 {
 621         msg_set_bits(m, 4, 0, 0xffff, n);
 622 }
 623
 624
 625 static inline u32 msg_long_msgno(struct tipc_msg *m)
 626 {
 627         return msg_bits(m, 4, 0, 0xffff);
 628 }
 629
 630 static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
 631 {
 632         msg_set_bits(m, 4, 0, 0xffff, n);
 633 }
 634
 635 static inline u32 msg_bc_netid(struct tipc_msg *m)
 636 {
 637         return msg_word(m, 4);
 638 }
 639
 640 static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
 641 {
 642         msg_set_word(m, 4, id);
 643 }
 644
 645 static inline u32 msg_link_selector(struct tipc_msg *m)
 646 {
 647         return msg_bits(m, 4, 0, 1);
 648 }
 649
 650 static inline void msg_set_link_selector(struct tipc_msg *m, u32 n)
 651 {
 652         msg_set_bits(m, 4, 0, 1, (n & 1));
 653 }
 654
 655 /*
 656  * Word 5
 657  */
 658
 659 static inline u32 msg_session(struct tipc_msg *m)
 660 {
 661         return msg_bits(m, 5, 16, 0xffff);
 662 }
 663
 664 static inline void msg_set_session(struct tipc_msg *m, u32 n)
 665 {
 666         msg_set_bits(m, 5, 16, 0xffff, n);
 667 }
 668
 669 static inline u32 msg_probe(struct tipc_msg *m)
 670 {
 671         return msg_bits(m, 5, 0, 1);
 672 }
 673
 674 static inline void msg_set_probe(struct tipc_msg *m, u32 val)
 675 {
 676         msg_set_bits(m, 5, 0, 1, (val & 1));
 677 }
 678
 679 static inline char msg_net_plane(struct tipc_msg *m)
 680 {
 681         return msg_bits(m, 5, 1, 7) + 'A';
 682 }
 683
 684 static inline void msg_set_net_plane(struct tipc_msg *m, char n)
 685 {
 686         msg_set_bits(m, 5, 1, 7, (n - 'A'));
 687 }
 688
 689 static inline u32 msg_linkprio(struct tipc_msg *m)
 690 {
 691         return msg_bits(m, 5, 4, 0x1f);
 692 }
 693
 694 static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
 695 {
 696         msg_set_bits(m, 5, 4, 0x1f, n);
 697 }
 698
 699 static inline u32 msg_bearer_id(struct tipc_msg *m)
 700 {
 701         return msg_bits(m, 5, 9, 0x7);
 702 }
 703
 704 static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
 705 {
 706         msg_set_bits(m, 5, 9, 0x7, n);
 707 }
 708
 709 static inline u32 msg_redundant_link(struct tipc_msg *m)
 710 {
 711         return msg_bits(m, 5, 12, 0x1);
 712 }
 713
 714 static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
 715 {
 716         msg_set_bits(m, 5, 12, 0x1, r);
 717 }
 718
 719
 720 /*
 721  * Word 9
 722  */
 723
 724 static inline u32 msg_msgcnt(struct tipc_msg *m)
 725 {
 726         return msg_bits(m, 9, 16, 0xffff);
 727 }
 728
 729 static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n)
 730 {
 731         msg_set_bits(m, 9, 16, 0xffff, n);
 732 }
 733
 734 static inline u32 msg_bcast_tag(struct tipc_msg *m)
 735 {
 736         return msg_bits(m, 9, 16, 0xffff);
 737 }
 738
 739 static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n)
 740 {
 741         msg_set_bits(m, 9, 16, 0xffff, n);
 742 }
 743
 744 static inline u32 msg_max_pkt(struct tipc_msg *m)
 745 {
 746         return msg_bits(m, 9, 16, 0xffff) * 4;
 747 }
 748
 749 static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
 750 {
 751         msg_set_bits(m, 9, 16, 0xffff, (n / 4));
 752 }
 753
 754 static inline u32 msg_link_tolerance(struct tipc_msg *m)
 755 {
 756         return msg_bits(m, 9, 0, 0xffff);
 757 }
 758
 759 static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
 760 {
 761         msg_set_bits(m, 9, 0, 0xffff, n);
 762 }
 763
 764 /*
 765  * Segmentation message types
 766  */
 767
 768 #define FIRST_FRAGMENT     0
 769 #define FRAGMENT           1
 770 #define LAST_FRAGMENT      2
 771
 772 /*
 773  * Link management protocol message types
 774  */
 775
 776 #define STATE_MSG       0
 777 #define RESET_MSG       1
 778 #define ACTIVATE_MSG    2
 779
 780 /*
 781  * Changeover tunnel message types
 782  */
 783 #define DUPLICATE_MSG    0
 784 #define ORIGINAL_MSG     1
 785
 786 /*
 787  * Routing table message types
 788  */
 789 #define EXT_ROUTING_TABLE    0
 790 #define LOCAL_ROUTING_TABLE  1          /* obsoleted */
 791 #define SLAVE_ROUTING_TABLE  2
 792 #define ROUTE_ADDITION       3
 793 #define ROUTE_REMOVAL        4
 794
 795 /*
 796  * Config protocol message types
 797  */
 798
 799 #define DSC_REQ_MSG          0
 800 #define DSC_RESP_MSG         1
 801
 802 u32 tipc_msg_tot_importance(struct tipc_msg *m);
 803 void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type,
 804                             u32 hsize, u32 destnode);
 805 int tipc_msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect);
 806 int tipc_msg_build(struct tipc_msg *hdr,
 807                             struct iovec const *msg_sect, u32 num_sect,
 808                             int max_size, int usrmem, struct sk_buff **buf);
 809
 810 static inline void msg_set_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
 811 {
 812         memcpy(&((int *)m)[5], a, sizeof(*a));
 813 }
 814
 815 static inline void msg_get_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
 816 {
 817         memcpy(a, &((int *)m)[5], sizeof(*a));
 818 }
 819
 820 #endif