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_routed(struct tipc_msg *m)
 425 {
 426         if (likely(msg_short(m)))
 427                 return 0;
 428         return (msg_destnode(m) ^ msg_orignode(m)) >> 11;
 429 }
 430
 431 static inline u32 msg_nametype(struct tipc_msg *m)
 432 {
 433         return msg_word(m, 8);
 434 }
 435
 436 static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
 437 {
 438         msg_set_word(m, 8, n);
 439 }
 440
 441 static inline u32 msg_nameinst(struct tipc_msg *m)
 442 {
 443         return msg_word(m, 9);
 444 }
 445
 446 static inline u32 msg_namelower(struct tipc_msg *m)
 447 {
 448         return msg_nameinst(m);
 449 }
 450
 451 static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
 452 {
 453         msg_set_word(m, 9, n);
 454 }
 455
 456 static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
 457 {
 458         msg_set_namelower(m, n);
 459 }
 460
 461 static inline u32 msg_nameupper(struct tipc_msg *m)
 462 {
 463         return msg_word(m, 10);
 464 }
 465
 466 static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
 467 {
 468         msg_set_word(m, 10, n);
 469 }
 470
 471 static inline unchar *msg_data(struct tipc_msg *m)
 472 {
 473         return ((unchar *)m) + msg_hdr_sz(m);
 474 }
 475
 476 static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
 477 {
 478         return (struct tipc_msg *)msg_data(m);
 479 }
 480
 481
 482 /*
 483                 TIPC internal message header format, version 2
 484
 485        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
 486       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 487    w0:|vers |msg usr|hdr sz |n|resrv|            packet size          |
 488       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 489    w1:|m typ|      sequence gap       |       broadcast ack no        |
 490       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 491    w2:| link level ack no/bc_gap_from |     seq no / bcast_gap_to     |
 492       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 493    w3:|                       previous node                           |
 494       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 495    w4:|  next sent broadcast/fragm no | next sent pkt/ fragm msg no   |
 496       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 497    w5:|          session no           |rsv=0|r|berid|link prio|netpl|p|
 498       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 499    w6:|                      originating node                         |
 500       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 501    w7:|                      destination node                         |
 502       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 503    w8:|                   transport sequence number                   |
 504       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 505    w9:|   msg count / bcast tag       |       link tolerance          |
 506       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 507       \                                                               \
 508       /                     User Specific Data                        /
 509       \                                                               \
 510       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 511
 512       NB: CONN_MANAGER use data message format. LINK_CONFIG has own format.
 513 */
 514
 515 /*
 516  * Internal users
 517  */
 518
 519 #define  BCAST_PROTOCOL       5
 520 #define  MSG_BUNDLER          6
 521 #define  LINK_PROTOCOL        7
 522 #define  CONN_MANAGER         8
 523 #define  ROUTE_DISTRIBUTOR    9         /* obsoleted */
 524 #define  CHANGEOVER_PROTOCOL  10
 525 #define  NAME_DISTRIBUTOR     11
 526 #define  MSG_FRAGMENTER       12
 527 #define  LINK_CONFIG          13
 528 #define  DSC_H_SIZE           40
 529
 530 /*
 531  *  Connection management protocol messages
 532  */
 533
 534 #define CONN_PROBE        0
 535 #define CONN_PROBE_REPLY  1
 536 #define CONN_ACK          2
 537
 538 /*
 539  * Name distributor messages
 540  */
 541
 542 #define PUBLICATION       0
 543 #define WITHDRAWAL        1
 544
 545
 546 /*
 547  * Word 1
 548  */
 549
 550 static inline u32 msg_seq_gap(struct tipc_msg *m)
 551 {
 552         return msg_bits(m, 1, 16, 0x1fff);
 553 }
 554
 555 static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
 556 {
 557         msg_set_bits(m, 1, 16, 0x1fff, n);
 558 }
 559
 560
 561 /*
 562  * Word 2
 563  */
 564
 565 static inline u32 msg_dest_domain(struct tipc_msg *m)
 566 {
 567         return msg_word(m, 2);
 568 }
 569
 570 static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
 571 {
 572         msg_set_word(m, 2, n);
 573 }
 574
 575 static inline u32 msg_bcgap_after(struct tipc_msg *m)
 576 {
 577         return msg_bits(m, 2, 16, 0xffff);
 578 }
 579
 580 static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
 581 {
 582         msg_set_bits(m, 2, 16, 0xffff, n);
 583 }
 584
 585 static inline u32 msg_bcgap_to(struct tipc_msg *m)
 586 {
 587         return msg_bits(m, 2, 0, 0xffff);
 588 }
 589
 590 static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
 591 {
 592         msg_set_bits(m, 2, 0, 0xffff, n);
 593 }
 594
 595
 596 /*
 597  * Word 4
 598  */
 599
 600 static inline u32 msg_last_bcast(struct tipc_msg *m)
 601 {
 602         return msg_bits(m, 4, 16, 0xffff);
 603 }
 604
 605 static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
 606 {
 607         msg_set_bits(m, 4, 16, 0xffff, n);
 608 }
 609
 610
 611 static inline u32 msg_fragm_no(struct tipc_msg *m)
 612 {
 613         return msg_bits(m, 4, 16, 0xffff);
 614 }
 615
 616 static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
 617 {
 618         msg_set_bits(m, 4, 16, 0xffff, n);
 619 }
 620
 621
 622 static inline u32 msg_next_sent(struct tipc_msg *m)
 623 {
 624         return msg_bits(m, 4, 0, 0xffff);
 625 }
 626
 627 static inline void msg_set_next_sent(struct tipc_msg *m, u32 n)
 628 {
 629         msg_set_bits(m, 4, 0, 0xffff, n);
 630 }
 631
 632
 633 static inline u32 msg_long_msgno(struct tipc_msg *m)
 634 {
 635         return msg_bits(m, 4, 0, 0xffff);
 636 }
 637
 638 static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
 639 {
 640         msg_set_bits(m, 4, 0, 0xffff, n);
 641 }
 642
 643 static inline u32 msg_bc_netid(struct tipc_msg *m)
 644 {
 645         return msg_word(m, 4);
 646 }
 647
 648 static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
 649 {
 650         msg_set_word(m, 4, id);
 651 }
 652
 653 static inline u32 msg_link_selector(struct tipc_msg *m)
 654 {
 655         return msg_bits(m, 4, 0, 1);
 656 }
 657
 658 static inline void msg_set_link_selector(struct tipc_msg *m, u32 n)
 659 {
 660         msg_set_bits(m, 4, 0, 1, (n & 1));
 661 }
 662
 663 /*
 664  * Word 5
 665  */
 666
 667 static inline u32 msg_session(struct tipc_msg *m)
 668 {
 669         return msg_bits(m, 5, 16, 0xffff);
 670 }
 671
 672 static inline void msg_set_session(struct tipc_msg *m, u32 n)
 673 {
 674         msg_set_bits(m, 5, 16, 0xffff, n);
 675 }
 676
 677 static inline u32 msg_probe(struct tipc_msg *m)
 678 {
 679         return msg_bits(m, 5, 0, 1);
 680 }
 681
 682 static inline void msg_set_probe(struct tipc_msg *m, u32 val)
 683 {
 684         msg_set_bits(m, 5, 0, 1, (val & 1));
 685 }
 686
 687 static inline char msg_net_plane(struct tipc_msg *m)
 688 {
 689         return msg_bits(m, 5, 1, 7) + 'A';
 690 }
 691
 692 static inline void msg_set_net_plane(struct tipc_msg *m, char n)
 693 {
 694         msg_set_bits(m, 5, 1, 7, (n - 'A'));
 695 }
 696
 697 static inline u32 msg_linkprio(struct tipc_msg *m)
 698 {
 699         return msg_bits(m, 5, 4, 0x1f);
 700 }
 701
 702 static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
 703 {
 704         msg_set_bits(m, 5, 4, 0x1f, n);
 705 }
 706
 707 static inline u32 msg_bearer_id(struct tipc_msg *m)
 708 {
 709         return msg_bits(m, 5, 9, 0x7);
 710 }
 711
 712 static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
 713 {
 714         msg_set_bits(m, 5, 9, 0x7, n);
 715 }
 716
 717 static inline u32 msg_redundant_link(struct tipc_msg *m)
 718 {
 719         return msg_bits(m, 5, 12, 0x1);
 720 }
 721
 722 static inline void msg_set_redundant_link(struct tipc_msg *m)
 723 {
 724         msg_set_bits(m, 5, 12, 0x1, 1);
 725 }
 726
 727 static inline void msg_clear_redundant_link(struct tipc_msg *m)
 728 {
 729         msg_set_bits(m, 5, 12, 0x1, 0);
 730 }
 731
 732
 733 /*
 734  * Word 9
 735  */
 736
 737 static inline u32 msg_msgcnt(struct tipc_msg *m)
 738 {
 739         return msg_bits(m, 9, 16, 0xffff);
 740 }
 741
 742 static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n)
 743 {
 744         msg_set_bits(m, 9, 16, 0xffff, n);
 745 }
 746
 747 static inline u32 msg_bcast_tag(struct tipc_msg *m)
 748 {
 749         return msg_bits(m, 9, 16, 0xffff);
 750 }
 751
 752 static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n)
 753 {
 754         msg_set_bits(m, 9, 16, 0xffff, n);
 755 }
 756
 757 static inline u32 msg_max_pkt(struct tipc_msg *m)
 758 {
 759         return msg_bits(m, 9, 16, 0xffff) * 4;
 760 }
 761
 762 static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
 763 {
 764         msg_set_bits(m, 9, 16, 0xffff, (n / 4));
 765 }
 766
 767 static inline u32 msg_link_tolerance(struct tipc_msg *m)
 768 {
 769         return msg_bits(m, 9, 0, 0xffff);
 770 }
 771
 772 static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
 773 {
 774         msg_set_bits(m, 9, 0, 0xffff, n);
 775 }
 776
 777 /*
 778  * Routing table message data
 779  */
 780
 781
 782 static inline u32 msg_remote_node(struct tipc_msg *m)
 783 {
 784         return msg_word(m, msg_hdr_sz(m)/4);
 785 }
 786
 787 static inline void msg_set_remote_node(struct tipc_msg *m, u32 a)
 788 {
 789         msg_set_word(m, msg_hdr_sz(m)/4, a);
 790 }
 791
 792 /*
 793  * Segmentation message types
 794  */
 795
 796 #define FIRST_FRAGMENT     0
 797 #define FRAGMENT           1
 798 #define LAST_FRAGMENT      2
 799
 800 /*
 801  * Link management protocol message types
 802  */
 803
 804 #define STATE_MSG       0
 805 #define RESET_MSG       1
 806 #define ACTIVATE_MSG    2
 807
 808 /*
 809  * Changeover tunnel message types
 810  */
 811 #define DUPLICATE_MSG    0
 812 #define ORIGINAL_MSG     1
 813
 814 /*
 815  * Routing table message types
 816  */
 817 #define EXT_ROUTING_TABLE    0
 818 #define LOCAL_ROUTING_TABLE  1          /* obsoleted */
 819 #define SLAVE_ROUTING_TABLE  2
 820 #define ROUTE_ADDITION       3
 821 #define ROUTE_REMOVAL        4
 822
 823 /*
 824  * Config protocol message types
 825  */
 826
 827 #define DSC_REQ_MSG          0
 828 #define DSC_RESP_MSG         1
 829
 830 u32 tipc_msg_tot_importance(struct tipc_msg *m);
 831 void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type,
 832                             u32 hsize, u32 destnode);
 833 int tipc_msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect);
 834 int tipc_msg_build(struct tipc_msg *hdr,
 835                             struct iovec const *msg_sect, u32 num_sect,
 836                             int max_size, int usrmem, struct sk_buff **buf);
 837
 838 static inline void msg_set_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
 839 {
 840         memcpy(&((int *)m)[5], a, sizeof(*a));
 841 }
 842
 843 static inline void msg_get_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
 844 {
 845         memcpy(a, &((int *)m)[5], sizeof(*a));
 846 }
 847
 848 #endif