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
  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  * Words 3-10
 315  */
 316
 317
 318 static inline u32 msg_prevnode(struct tipc_msg *m)
 319 {
 320         return msg_word(m, 3);
 321 }
 322
 323 static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
 324 {
 325         msg_set_word(m, 3, a);
 326 }
 327
 328 static inline u32 msg_origport(struct tipc_msg *m)
 329 {
 330         return msg_word(m, 4);
 331 }
 332
 333 static inline void msg_set_origport(struct tipc_msg *m, u32 p)
 334 {
 335         msg_set_word(m, 4, p);
 336 }
 337
 338 static inline u32 msg_destport(struct tipc_msg *m)
 339 {
 340         return msg_word(m, 5);
 341 }
 342
 343 static inline void msg_set_destport(struct tipc_msg *m, u32 p)
 344 {
 345         msg_set_word(m, 5, p);
 346 }
 347
 348 static inline u32 msg_mc_netid(struct tipc_msg *m)
 349 {
 350         return msg_word(m, 5);
 351 }
 352
 353 static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
 354 {
 355         msg_set_word(m, 5, p);
 356 }
 357
 358 static inline int msg_short(struct tipc_msg *m)
 359 {
 360         return msg_hdr_sz(m) == SHORT_H_SIZE;
 361 }
 362
 363 static inline u32 msg_orignode(struct tipc_msg *m)
 364 {
 365         if (likely(msg_short(m)))
 366                 return msg_prevnode(m);
 367         return msg_word(m, 6);
 368 }
 369
 370 static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
 371 {
 372         msg_set_word(m, 6, a);
 373 }
 374
 375 static inline u32 msg_destnode(struct tipc_msg *m)
 376 {
 377         return msg_word(m, 7);
 378 }
 379
 380 static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
 381 {
 382         msg_set_word(m, 7, a);
 383 }
 384
 385 static inline int msg_is_dest(struct tipc_msg *m, u32 d)
 386 {
 387         return msg_short(m) || (msg_destnode(m) == d);
 388 }
 389
 390 static inline u32 msg_nametype(struct tipc_msg *m)
 391 {
 392         return msg_word(m, 8);
 393 }
 394
 395 static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
 396 {
 397         msg_set_word(m, 8, n);
 398 }
 399
 400 static inline u32 msg_nameinst(struct tipc_msg *m)
 401 {
 402         return msg_word(m, 9);
 403 }
 404
 405 static inline u32 msg_namelower(struct tipc_msg *m)
 406 {
 407         return msg_nameinst(m);
 408 }
 409
 410 static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
 411 {
 412         msg_set_word(m, 9, n);
 413 }
 414
 415 static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
 416 {
 417         msg_set_namelower(m, n);
 418 }
 419
 420 static inline u32 msg_nameupper(struct tipc_msg *m)
 421 {
 422         return msg_word(m, 10);
 423 }
 424
 425 static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
 426 {
 427         msg_set_word(m, 10, n);
 428 }
 429
 430 static inline unchar *msg_data(struct tipc_msg *m)
 431 {
 432         return ((unchar *)m) + msg_hdr_sz(m);
 433 }
 434
 435 static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
 436 {
 437         return (struct tipc_msg *)msg_data(m);
 438 }
 439
 440
 441 /*
 442  * Constants and routines used to read and write TIPC internal message headers
 443  */
 444
 445 /*
 446  * Internal message users
 447  */
 448
 449 #define  BCAST_PROTOCOL       5
 450 #define  MSG_BUNDLER          6
 451 #define  LINK_PROTOCOL        7
 452 #define  CONN_MANAGER         8
 453 #define  ROUTE_DISTRIBUTOR    9         /* obsoleted */
 454 #define  CHANGEOVER_PROTOCOL  10
 455 #define  NAME_DISTRIBUTOR     11
 456 #define  MSG_FRAGMENTER       12
 457 #define  LINK_CONFIG          13
 458
 459 /*
 460  *  Connection management protocol message types
 461  */
 462
 463 #define CONN_PROBE        0
 464 #define CONN_PROBE_REPLY  1
 465 #define CONN_ACK          2
 466
 467 /*
 468  * Name distributor message types
 469  */
 470
 471 #define PUBLICATION       0
 472 #define WITHDRAWAL        1
 473
 474 /*
 475  * Segmentation message types
 476  */
 477
 478 #define FIRST_FRAGMENT          0
 479 #define FRAGMENT                1
 480 #define LAST_FRAGMENT           2
 481
 482 /*
 483  * Link management protocol message types
 484  */
 485
 486 #define STATE_MSG               0
 487 #define RESET_MSG               1
 488 #define ACTIVATE_MSG            2
 489
 490 /*
 491  * Changeover tunnel message types
 492  */
 493 #define DUPLICATE_MSG           0
 494 #define ORIGINAL_MSG            1
 495
 496 /*
 497  * Config protocol message types
 498  */
 499
 500 #define DSC_REQ_MSG             0
 501 #define DSC_RESP_MSG            1
 502
 503
 504 /*
 505  * Word 1
 506  */
 507
 508 static inline u32 msg_seq_gap(struct tipc_msg *m)
 509 {
 510         return msg_bits(m, 1, 16, 0x1fff);
 511 }
 512
 513 static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
 514 {
 515         msg_set_bits(m, 1, 16, 0x1fff, n);
 516 }
 517
 518
 519 /*
 520  * Word 2
 521  */
 522
 523 static inline u32 msg_dest_domain(struct tipc_msg *m)
 524 {
 525         return msg_word(m, 2);
 526 }
 527
 528 static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
 529 {
 530         msg_set_word(m, 2, n);
 531 }
 532
 533 static inline u32 msg_bcgap_after(struct tipc_msg *m)
 534 {
 535         return msg_bits(m, 2, 16, 0xffff);
 536 }
 537
 538 static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
 539 {
 540         msg_set_bits(m, 2, 16, 0xffff, n);
 541 }
 542
 543 static inline u32 msg_bcgap_to(struct tipc_msg *m)
 544 {
 545         return msg_bits(m, 2, 0, 0xffff);
 546 }
 547
 548 static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
 549 {
 550         msg_set_bits(m, 2, 0, 0xffff, n);
 551 }
 552
 553
 554 /*
 555  * Word 4
 556  */
 557
 558 static inline u32 msg_last_bcast(struct tipc_msg *m)
 559 {
 560         return msg_bits(m, 4, 16, 0xffff);
 561 }
 562
 563 static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
 564 {
 565         msg_set_bits(m, 4, 16, 0xffff, n);
 566 }
 567
 568
 569 static inline u32 msg_fragm_no(struct tipc_msg *m)
 570 {
 571         return msg_bits(m, 4, 16, 0xffff);
 572 }
 573
 574 static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
 575 {
 576         msg_set_bits(m, 4, 16, 0xffff, n);
 577 }
 578
 579
 580 static inline u32 msg_next_sent(struct tipc_msg *m)
 581 {
 582         return msg_bits(m, 4, 0, 0xffff);
 583 }
 584
 585 static inline void msg_set_next_sent(struct tipc_msg *m, u32 n)
 586 {
 587         msg_set_bits(m, 4, 0, 0xffff, n);
 588 }
 589
 590
 591 static inline u32 msg_long_msgno(struct tipc_msg *m)
 592 {
 593         return msg_bits(m, 4, 0, 0xffff);
 594 }
 595
 596 static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
 597 {
 598         msg_set_bits(m, 4, 0, 0xffff, n);
 599 }
 600
 601 static inline u32 msg_bc_netid(struct tipc_msg *m)
 602 {
 603         return msg_word(m, 4);
 604 }
 605
 606 static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
 607 {
 608         msg_set_word(m, 4, id);
 609 }
 610
 611 static inline u32 msg_link_selector(struct tipc_msg *m)
 612 {
 613         return msg_bits(m, 4, 0, 1);
 614 }
 615
 616 static inline void msg_set_link_selector(struct tipc_msg *m, u32 n)
 617 {
 618         msg_set_bits(m, 4, 0, 1, n);
 619 }
 620
 621 /*
 622  * Word 5
 623  */
 624
 625 static inline u32 msg_session(struct tipc_msg *m)
 626 {
 627         return msg_bits(m, 5, 16, 0xffff);
 628 }
 629
 630 static inline void msg_set_session(struct tipc_msg *m, u32 n)
 631 {
 632         msg_set_bits(m, 5, 16, 0xffff, n);
 633 }
 634
 635 static inline u32 msg_probe(struct tipc_msg *m)
 636 {
 637         return msg_bits(m, 5, 0, 1);
 638 }
 639
 640 static inline void msg_set_probe(struct tipc_msg *m, u32 val)
 641 {
 642         msg_set_bits(m, 5, 0, 1, val);
 643 }
 644
 645 static inline char msg_net_plane(struct tipc_msg *m)
 646 {
 647         return msg_bits(m, 5, 1, 7) + 'A';
 648 }
 649
 650 static inline void msg_set_net_plane(struct tipc_msg *m, char n)
 651 {
 652         msg_set_bits(m, 5, 1, 7, (n - 'A'));
 653 }
 654
 655 static inline u32 msg_linkprio(struct tipc_msg *m)
 656 {
 657         return msg_bits(m, 5, 4, 0x1f);
 658 }
 659
 660 static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
 661 {
 662         msg_set_bits(m, 5, 4, 0x1f, n);
 663 }
 664
 665 static inline u32 msg_bearer_id(struct tipc_msg *m)
 666 {
 667         return msg_bits(m, 5, 9, 0x7);
 668 }
 669
 670 static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
 671 {
 672         msg_set_bits(m, 5, 9, 0x7, n);
 673 }
 674
 675 static inline u32 msg_redundant_link(struct tipc_msg *m)
 676 {
 677         return msg_bits(m, 5, 12, 0x1);
 678 }
 679
 680 static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
 681 {
 682         msg_set_bits(m, 5, 12, 0x1, r);
 683 }
 684
 685
 686 /*
 687  * Word 9
 688  */
 689
 690 static inline u32 msg_msgcnt(struct tipc_msg *m)
 691 {
 692         return msg_bits(m, 9, 16, 0xffff);
 693 }
 694
 695 static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n)
 696 {
 697         msg_set_bits(m, 9, 16, 0xffff, n);
 698 }
 699
 700 static inline u32 msg_bcast_tag(struct tipc_msg *m)
 701 {
 702         return msg_bits(m, 9, 16, 0xffff);
 703 }
 704
 705 static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n)
 706 {
 707         msg_set_bits(m, 9, 16, 0xffff, n);
 708 }
 709
 710 static inline u32 msg_max_pkt(struct tipc_msg *m)
 711 {
 712         return msg_bits(m, 9, 16, 0xffff) * 4;
 713 }
 714
 715 static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
 716 {
 717         msg_set_bits(m, 9, 16, 0xffff, (n / 4));
 718 }
 719
 720 static inline u32 msg_link_tolerance(struct tipc_msg *m)
 721 {
 722         return msg_bits(m, 9, 0, 0xffff);
 723 }
 724
 725 static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
 726 {
 727         msg_set_bits(m, 9, 0, 0xffff, n);
 728 }
 729
 730 u32 tipc_msg_tot_importance(struct tipc_msg *m);
 731 void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type,
 732                             u32 hsize, u32 destnode);
 733 int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect,
 734                    u32 num_sect, unsigned int total_len,
 735                             int max_size, int usrmem, struct sk_buff **buf);
 736
 737 static inline void msg_set_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
 738 {
 739         memcpy(&((int *)m)[5], a, sizeof(*a));
 740 }
 741
 742 static inline void msg_get_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
 743 {
 744         memcpy(a, &((int *)m)[5], sizeof(*a));
 745 }
 746
 747 #endif