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