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 /*
  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    /* Connected, in-cluster messages */
  72 #define DIR_MSG_H_SIZE            32    /* Directly addressed messages */
  73 #define LONG_H_SIZE               40    /* Named messages */
  74 #define MCAST_H_SIZE              44    /* Multicast messages */
  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
  82 struct tipc_msg {
  83         __be32 hdr[15];
  84 };
  85
  86
  87 static inline u32 msg_word(struct tipc_msg *m, u32 pos)
  88 {
  89         return ntohl(m->hdr[pos]);
  90 }
  91
  92 static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
  93 {
  94         m->hdr[w] = htonl(val);
  95 }
  96
  97 static 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
 102 static 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
 111 static 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
 123 static inline u32 msg_version(struct tipc_msg *m)
 124 {
 125         return msg_bits(m, 0, 29, 7);
 126 }
 127
 128 static inline void msg_set_version(struct tipc_msg *m)
 129 {
 130         msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
 131 }
 132
 133 static inline u32 msg_user(struct tipc_msg *m)
 134 {
 135         return msg_bits(m, 0, 25, 0xf);
 136 }
 137
 138 static inline u32 msg_isdata(struct tipc_msg *m)
 139 {
 140         return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
 141 }
 142
 143 static inline void msg_set_user(struct tipc_msg *m, u32 n)
 144 {
 145         msg_set_bits(m, 0, 25, 0xf, n);
 146 }
 147
 148 static inline u32 msg_importance(struct tipc_msg *m)
 149 {
 150         return msg_bits(m, 0, 25, 0xf);
 151 }
 152
 153 static inline void msg_set_importance(struct tipc_msg *m, u32 i)
 154 {
 155         msg_set_user(m, i);
 156 }
 157
 158 static inline u32 msg_hdr_sz(struct tipc_msg *m)
 159 {
 160         return msg_bits(m, 0, 21, 0xf) << 2;
 161 }
 162
 163 static 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
 168 static inline u32 msg_size(struct tipc_msg *m)
 169 {
 170         return msg_bits(m, 0, 0, 0x1ffff);
 171 }
 172
 173 static inline u32 msg_data_sz(struct tipc_msg *m)
 174 {
 175         return msg_size(m) - msg_hdr_sz(m);
 176 }
 177
 178 static inline int msg_non_seq(struct tipc_msg *m)
 179 {
 180         return msg_bits(m, 0, 20, 1);
 181 }
 182
 183 static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
 184 {
 185         msg_set_bits(m, 0, 20, 1, n);
 186 }
 187
 188 static inline int msg_dest_droppable(struct tipc_msg *m)
 189 {
 190         return msg_bits(m, 0, 19, 1);
 191 }
 192
 193 static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
 194 {
 195         msg_set_bits(m, 0, 19, 1, d);
 196 }
 197
 198 static inline int msg_src_droppable(struct tipc_msg *m)
 199 {
 200         return msg_bits(m, 0, 18, 1);
 201 }
 202
 203 static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
 204 {
 205         msg_set_bits(m, 0, 18, 1, d);
 206 }
 207
 208 static 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
 218 static inline u32 msg_type(struct tipc_msg *m)
 219 {
 220         return msg_bits(m, 1, 29, 0x7);
 221 }
 222
 223 static inline void msg_set_type(struct tipc_msg *m, u32 n)
 224 {
 225         msg_set_bits(m, 1, 29, 0x7, n);
 226 }
 227
 228 static inline u32 msg_named(struct tipc_msg *m)
 229 {
 230         return msg_type(m) == TIPC_NAMED_MSG;
 231 }
 232
 233 static inline u32 msg_mcast(struct tipc_msg *m)
 234 {
 235         return msg_type(m) == TIPC_MCAST_MSG;
 236 }
 237
 238 static inline u32 msg_connected(struct tipc_msg *m)
 239 {
 240         return msg_type(m) == TIPC_CONN_MSG;
 241 }
 242
 243 static inline u32 msg_errcode(struct tipc_msg *m)
 244 {
 245         return msg_bits(m, 1, 25, 0xf);
 246 }
 247
 248 static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
 249 {
 250         msg_set_bits(m, 1, 25, 0xf, err);
 251 }
 252
 253 static inline u32 msg_reroute_cnt(struct tipc_msg *m)
 254 {
 255         return msg_bits(m, 1, 21, 0xf);
 256 }
 257
 258 static 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
 263 static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
 264 {
 265         msg_set_bits(m, 1, 21, 0xf, 0);
 266 }
 267
 268 static inline u32 msg_lookup_scope(struct tipc_msg *m)
 269 {
 270         return msg_bits(m, 1, 19, 0x3);
 271 }
 272
 273 static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
 274 {
 275         msg_set_bits(m, 1, 19, 0x3, n);
 276 }
 277
 278 static inline u32 msg_bcast_ack(struct tipc_msg *m)
 279 {
 280         return msg_bits(m, 1, 0, 0xffff);
 281 }
 282
 283 static 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
 293 static inline u32 msg_ack(struct tipc_msg *m)
 294 {
 295         return msg_bits(m, 2, 16, 0xffff);
 296 }
 297
 298 static inline void msg_set_ack(struct tipc_msg *m, u32 n)
 299 {
 300         msg_set_bits(m, 2, 16, 0xffff, n);
 301 }
 302
 303 static inline u32 msg_seqno(struct tipc_msg *m)
 304 {
 305         return msg_bits(m, 2, 0, 0xffff);
 306 }
 307
 308 static 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  * TIPC may utilize the "link ack #" and "link seq #" fields of a short
 315  * message header to hold the destination node for the message, since the
 316  * normal "dest node" field isn't present.  This cache is only referenced
 317  * when required, so populating the cache of a longer message header is
 318  * harmless (as long as the header has the two link sequence fields present).
 319  *
 320  * Note: Host byte order is OK here, since the info never goes off-card.
 321  */
 322
 323 static inline u32 msg_destnode_cache(struct tipc_msg *m)
 324 {
 325         return m->hdr[2];
 326 }
 327
 328 static inline void msg_set_destnode_cache(struct tipc_msg *m, u32 dnode)
 329 {
 330         m->hdr[2] = dnode;
 331 }
 332
 333 /*
 334  * Words 3-10
 335  */
 336
 337
 338 static inline u32 msg_prevnode(struct tipc_msg *m)
 339 {
 340         return msg_word(m, 3);
 341 }
 342
 343 static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
 344 {
 345         msg_set_word(m, 3, a);
 346 }
 347
 348 static inline u32 msg_origport(struct tipc_msg *m)
 349 {
 350         return msg_word(m, 4);
 351 }
 352
 353 static inline void msg_set_origport(struct tipc_msg *m, u32 p)
 354 {
 355         msg_set_word(m, 4, p);
 356 }
 357
 358 static inline u32 msg_destport(struct tipc_msg *m)
 359 {
 360         return msg_word(m, 5);
 361 }
 362
 363 static inline void msg_set_destport(struct tipc_msg *m, u32 p)
 364 {
 365         msg_set_word(m, 5, p);
 366 }
 367
 368 static inline u32 msg_mc_netid(struct tipc_msg *m)
 369 {
 370         return msg_word(m, 5);
 371 }
 372
 373 static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
 374 {
 375         msg_set_word(m, 5, p);
 376 }
 377
 378 static inline int msg_short(struct tipc_msg *m)
 379 {
 380         return msg_hdr_sz(m) == 24;
 381 }
 382
 383 static inline u32 msg_orignode(struct tipc_msg *m)
 384 {
 385         if (likely(msg_short(m)))
 386                 return msg_prevnode(m);
 387         return msg_word(m, 6);
 388 }
 389
 390 static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
 391 {
 392         msg_set_word(m, 6, a);
 393 }
 394
 395 static inline u32 msg_destnode(struct tipc_msg *m)
 396 {
 397         return msg_word(m, 7);
 398 }
 399
 400 static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
 401 {
 402         msg_set_word(m, 7, a);
 403 }
 404
 405 static inline int msg_is_dest(struct tipc_msg *m, u32 d)
 406 {
 407         return msg_short(m) || (msg_destnode(m) == d);
 408 }
 409
 410 static inline u32 msg_nametype(struct tipc_msg *m)
 411 {
 412         return msg_word(m, 8);
 413 }
 414
 415 static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
 416 {
 417         msg_set_word(m, 8, n);
 418 }
 419
 420 static inline u32 msg_nameinst(struct tipc_msg *m)
 421 {
 422         return msg_word(m, 9);
 423 }
 424
 425 static inline u32 msg_namelower(struct tipc_msg *m)
 426 {
 427         return msg_nameinst(m);
 428 }
 429
 430 static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
 431 {
 432         msg_set_word(m, 9, n);
 433 }
 434
 435 static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
 436 {
 437         msg_set_namelower(m, n);
 438 }
 439
 440 static inline u32 msg_nameupper(struct tipc_msg *m)
 441 {
 442         return msg_word(m, 10);
 443 }
 444
 445 static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
 446 {
 447         msg_set_word(m, 10, n);
 448 }
 449
 450 static inline unchar *msg_data(struct tipc_msg *m)
 451 {
 452         return ((unchar *)m) + msg_hdr_sz(m);
 453 }
 454
 455 static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
 456 {
 457         return (struct tipc_msg *)msg_data(m);
 458 }
 459
 460
 461 /*
 462  * Constants and routines used to read and write TIPC internal message headers
 463  */
 464
 465 /*
 466  * Internal message users
 467  */
 468
 469 #define  BCAST_PROTOCOL       5
 470 #define  MSG_BUNDLER          6
 471 #define  LINK_PROTOCOL        7
 472 #define  CONN_MANAGER         8
 473 #define  ROUTE_DISTRIBUTOR    9         /* obsoleted */
 474 #define  CHANGEOVER_PROTOCOL  10
 475 #define  NAME_DISTRIBUTOR     11
 476 #define  MSG_FRAGMENTER       12
 477 #define  LINK_CONFIG          13
 478
 479 /*
 480  *  Connection management protocol message types
 481  */
 482
 483 #define CONN_PROBE        0
 484 #define CONN_PROBE_REPLY  1
 485 #define CONN_ACK          2
 486
 487 /*
 488  * Name distributor message types
 489  */
 490
 491 #define PUBLICATION       0
 492 #define WITHDRAWAL        1
 493
 494 /*
 495  * Segmentation message types
 496  */
 497
 498 #define FIRST_FRAGMENT          0
 499 #define FRAGMENT                1
 500 #define LAST_FRAGMENT           2
 501
 502 /*
 503  * Link management protocol message types
 504  */
 505
 506 #define STATE_MSG               0
 507 #define RESET_MSG               1
 508 #define ACTIVATE_MSG            2
 509
 510 /*
 511  * Changeover tunnel message types
 512  */
 513 #define DUPLICATE_MSG           0
 514 #define ORIGINAL_MSG            1
 515
 516 /*
 517  * Config protocol message types
 518  */
 519
 520 #define DSC_REQ_MSG             0
 521 #define DSC_RESP_MSG            1
 522
 523
 524 /*
 525  * Word 1
 526  */
 527
 528 static inline u32 msg_seq_gap(struct tipc_msg *m)
 529 {
 530         return msg_bits(m, 1, 16, 0x1fff);
 531 }
 532
 533 static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
 534 {
 535         msg_set_bits(m, 1, 16, 0x1fff, n);
 536 }
 537
 538
 539 /*
 540  * Word 2
 541  */
 542
 543 static inline u32 msg_dest_domain(struct tipc_msg *m)
 544 {
 545         return msg_word(m, 2);
 546 }
 547
 548 static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
 549 {
 550         msg_set_word(m, 2, n);
 551 }
 552
 553 static inline u32 msg_bcgap_after(struct tipc_msg *m)
 554 {
 555         return msg_bits(m, 2, 16, 0xffff);
 556 }
 557
 558 static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
 559 {
 560         msg_set_bits(m, 2, 16, 0xffff, n);
 561 }
 562
 563 static inline u32 msg_bcgap_to(struct tipc_msg *m)
 564 {
 565         return msg_bits(m, 2, 0, 0xffff);
 566 }
 567
 568 static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
 569 {
 570         msg_set_bits(m, 2, 0, 0xffff, n);
 571 }
 572
 573
 574 /*
 575  * Word 4
 576  */
 577
 578 static inline u32 msg_last_bcast(struct tipc_msg *m)
 579 {
 580         return msg_bits(m, 4, 16, 0xffff);
 581 }
 582
 583 static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
 584 {
 585         msg_set_bits(m, 4, 16, 0xffff, n);
 586 }
 587
 588
 589 static inline u32 msg_fragm_no(struct tipc_msg *m)
 590 {
 591         return msg_bits(m, 4, 16, 0xffff);
 592 }
 593
 594 static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
 595 {
 596         msg_set_bits(m, 4, 16, 0xffff, n);
 597 }
 598
 599
 600 static inline u32 msg_next_sent(struct tipc_msg *m)
 601 {
 602         return msg_bits(m, 4, 0, 0xffff);
 603 }
 604
 605 static inline void msg_set_next_sent(struct tipc_msg *m, u32 n)
 606 {
 607         msg_set_bits(m, 4, 0, 0xffff, n);
 608 }
 609
 610
 611 static inline u32 msg_long_msgno(struct tipc_msg *m)
 612 {
 613         return msg_bits(m, 4, 0, 0xffff);
 614 }
 615
 616 static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
 617 {
 618         msg_set_bits(m, 4, 0, 0xffff, n);
 619 }
 620
 621 static inline u32 msg_bc_netid(struct tipc_msg *m)
 622 {
 623         return msg_word(m, 4);
 624 }
 625
 626 static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
 627 {
 628         msg_set_word(m, 4, id);
 629 }
 630
 631 static inline u32 msg_link_selector(struct tipc_msg *m)
 632 {
 633         return msg_bits(m, 4, 0, 1);
 634 }
 635
 636 static inline void msg_set_link_selector(struct tipc_msg *m, u32 n)
 637 {
 638         msg_set_bits(m, 4, 0, 1, (n & 1));
 639 }
 640
 641 /*
 642  * Word 5
 643  */
 644
 645 static inline u32 msg_session(struct tipc_msg *m)
 646 {
 647         return msg_bits(m, 5, 16, 0xffff);
 648 }
 649
 650 static inline void msg_set_session(struct tipc_msg *m, u32 n)
 651 {
 652         msg_set_bits(m, 5, 16, 0xffff, n);
 653 }
 654
 655 static inline u32 msg_probe(struct tipc_msg *m)
 656 {
 657         return msg_bits(m, 5, 0, 1);
 658 }
 659
 660 static inline void msg_set_probe(struct tipc_msg *m, u32 val)
 661 {
 662         msg_set_bits(m, 5, 0, 1, (val & 1));
 663 }
 664
 665 static inline char msg_net_plane(struct tipc_msg *m)
 666 {
 667         return msg_bits(m, 5, 1, 7) + 'A';
 668 }
 669
 670 static inline void msg_set_net_plane(struct tipc_msg *m, char n)
 671 {
 672         msg_set_bits(m, 5, 1, 7, (n - 'A'));
 673 }
 674
 675 static inline u32 msg_linkprio(struct tipc_msg *m)
 676 {
 677         return msg_bits(m, 5, 4, 0x1f);
 678 }
 679
 680 static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
 681 {
 682         msg_set_bits(m, 5, 4, 0x1f, n);
 683 }
 684
 685 static inline u32 msg_bearer_id(struct tipc_msg *m)
 686 {
 687         return msg_bits(m, 5, 9, 0x7);
 688 }
 689
 690 static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
 691 {
 692         msg_set_bits(m, 5, 9, 0x7, n);
 693 }
 694
 695 static inline u32 msg_redundant_link(struct tipc_msg *m)
 696 {
 697         return msg_bits(m, 5, 12, 0x1);
 698 }
 699
 700 static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
 701 {
 702         msg_set_bits(m, 5, 12, 0x1, r);
 703 }
 704
 705
 706 /*
 707  * Word 9
 708  */
 709
 710 static inline u32 msg_msgcnt(struct tipc_msg *m)
 711 {
 712         return msg_bits(m, 9, 16, 0xffff);
 713 }
 714
 715 static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n)
 716 {
 717         msg_set_bits(m, 9, 16, 0xffff, n);
 718 }
 719
 720 static inline u32 msg_bcast_tag(struct tipc_msg *m)
 721 {
 722         return msg_bits(m, 9, 16, 0xffff);
 723 }
 724
 725 static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n)
 726 {
 727         msg_set_bits(m, 9, 16, 0xffff, n);
 728 }
 729
 730 static inline u32 msg_max_pkt(struct tipc_msg *m)
 731 {
 732         return msg_bits(m, 9, 16, 0xffff) * 4;
 733 }
 734
 735 static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
 736 {
 737         msg_set_bits(m, 9, 16, 0xffff, (n / 4));
 738 }
 739
 740 static inline u32 msg_link_tolerance(struct tipc_msg *m)
 741 {
 742         return msg_bits(m, 9, 0, 0xffff);
 743 }
 744
 745 static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
 746 {
 747         msg_set_bits(m, 9, 0, 0xffff, n);
 748 }
 749
 750 u32 tipc_msg_tot_importance(struct tipc_msg *m);
 751 void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type,
 752                             u32 hsize, u32 destnode);
 753 int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect,
 754                    u32 num_sect, unsigned int total_len,
 755                             int max_size, int usrmem, struct sk_buff **buf);
 756
 757 static inline void msg_set_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
 758 {
 759         memcpy(&((int *)m)[5], a, sizeof(*a));
 760 }
 761
 762 static inline void msg_get_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
 763 {
 764         memcpy(a, &((int *)m)[5], sizeof(*a));
 765 }
 766
 767 #endif