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net/tipc/msg.h
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/* * net/tipc/msg.h: Include file for TIPC message header routines |
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* |
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* Copyright (c) 2000-2007, Ericsson AB |
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* Copyright (c) 2005-2008, 2010-2011, Wind River Systems |
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* All rights reserved. * |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: * |
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* 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the names of the copyright holders nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. |
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* |
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* Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. */ #ifndef _TIPC_MSG_H #define _TIPC_MSG_H |
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#include "bearer.h" |
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/* * Constants and routines used to read and write TIPC payload message headers * * Note: Some items are also used with TIPC internal message headers */ |
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#define TIPC_VERSION 2 |
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/* |
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* Payload message users are defined in TIPC's public API: * - TIPC_LOW_IMPORTANCE * - TIPC_MEDIUM_IMPORTANCE * - TIPC_HIGH_IMPORTANCE * - TIPC_CRITICAL_IMPORTANCE */ /* * Payload message types |
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*/ #define TIPC_CONN_MSG 0 #define TIPC_MCAST_MSG 1 #define TIPC_NAMED_MSG 2 #define TIPC_DIRECT_MSG 3 |
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/* * Message header sizes */ |
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#define SHORT_H_SIZE 24 /* In-cluster basic payload message */ #define BASIC_H_SIZE 32 /* Basic payload message */ #define NAMED_H_SIZE 40 /* Named payload message */ #define MCAST_H_SIZE 44 /* Multicast payload message */ |
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#define INT_H_SIZE 40 /* Internal messages */ #define MIN_H_SIZE 24 /* Smallest legal TIPC header size */ #define MAX_H_SIZE 60 /* Largest possible TIPC header size */ |
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#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE) |
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#define TIPC_MEDIA_ADDR_OFFSET 5 |
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struct tipc_msg { __be32 hdr[15]; }; |
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static inline u32 msg_word(struct tipc_msg *m, u32 pos) { return ntohl(m->hdr[pos]); } |
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static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val) { m->hdr[w] = htonl(val); } |
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static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask) { return (msg_word(m, w) >> pos) & mask; } |
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static inline void msg_set_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask, u32 val) { |
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val = (val & mask) << pos; |
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mask = mask << pos; m->hdr[w] &= ~htonl(mask); m->hdr[w] |= htonl(val); |
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} |
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static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b) { u32 temp = msg->hdr[a]; msg->hdr[a] = msg->hdr[b]; msg->hdr[b] = temp; } |
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/* |
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* Word 0 */ static inline u32 msg_version(struct tipc_msg *m) { return msg_bits(m, 0, 29, 7); } |
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static inline void msg_set_version(struct tipc_msg *m) |
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{ |
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msg_set_bits(m, 0, 29, 7, TIPC_VERSION); |
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} static inline u32 msg_user(struct tipc_msg *m) { return msg_bits(m, 0, 25, 0xf); } static inline u32 msg_isdata(struct tipc_msg *m) { |
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return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE; |
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} |
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static inline void msg_set_user(struct tipc_msg *m, u32 n) |
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{ msg_set_bits(m, 0, 25, 0xf, n); } |
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static inline u32 msg_importance(struct tipc_msg *m) { return msg_bits(m, 0, 25, 0xf); } |
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static inline void msg_set_importance(struct tipc_msg *m, u32 i) |
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{ msg_set_user(m, i); } |
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static inline u32 msg_hdr_sz(struct tipc_msg *m) { return msg_bits(m, 0, 21, 0xf) << 2; } |
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static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n) |
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{ msg_set_bits(m, 0, 21, 0xf, n>>2); } |
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static inline u32 msg_size(struct tipc_msg *m) { return msg_bits(m, 0, 0, 0x1ffff); } static inline u32 msg_data_sz(struct tipc_msg *m) { return msg_size(m) - msg_hdr_sz(m); } |
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static inline int msg_non_seq(struct tipc_msg *m) |
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{ return msg_bits(m, 0, 20, 1); } |
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static inline void msg_set_non_seq(struct tipc_msg *m, u32 n) |
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{ |
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msg_set_bits(m, 0, 20, 1, n); |
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} |
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static inline int msg_dest_droppable(struct tipc_msg *m) |
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{ return msg_bits(m, 0, 19, 1); } |
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static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) |
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{ msg_set_bits(m, 0, 19, 1, d); } |
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static inline int msg_src_droppable(struct tipc_msg *m) |
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{ return msg_bits(m, 0, 18, 1); } |
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static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) |
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{ msg_set_bits(m, 0, 18, 1, d); } static inline void msg_set_size(struct tipc_msg *m, u32 sz) { m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz); } |
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/* |
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* Word 1 */ |
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static inline u32 msg_type(struct tipc_msg *m) { return msg_bits(m, 1, 29, 0x7); } |
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static inline void msg_set_type(struct tipc_msg *m, u32 n) |
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{ msg_set_bits(m, 1, 29, 0x7, n); } |
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static inline u32 msg_named(struct tipc_msg *m) { return msg_type(m) == TIPC_NAMED_MSG; } static inline u32 msg_mcast(struct tipc_msg *m) { return msg_type(m) == TIPC_MCAST_MSG; } static inline u32 msg_connected(struct tipc_msg *m) { return msg_type(m) == TIPC_CONN_MSG; } static inline u32 msg_errcode(struct tipc_msg *m) { return msg_bits(m, 1, 25, 0xf); } |
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static inline void msg_set_errcode(struct tipc_msg *m, u32 err) |
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{ msg_set_bits(m, 1, 25, 0xf, err); } |
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static inline u32 msg_reroute_cnt(struct tipc_msg *m) |
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{ return msg_bits(m, 1, 21, 0xf); } |
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static inline void msg_incr_reroute_cnt(struct tipc_msg *m) |
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{ msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1); } |
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static inline void msg_reset_reroute_cnt(struct tipc_msg *m) |
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{ msg_set_bits(m, 1, 21, 0xf, 0); } static inline u32 msg_lookup_scope(struct tipc_msg *m) { return msg_bits(m, 1, 19, 0x3); } |
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static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) |
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{ msg_set_bits(m, 1, 19, 0x3, n); } |
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static inline u32 msg_bcast_ack(struct tipc_msg *m) { return msg_bits(m, 1, 0, 0xffff); } |
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static inline void msg_set_bcast_ack(struct tipc_msg *m, u32 n) |
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{ msg_set_bits(m, 1, 0, 0xffff, n); } |
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/* |
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* Word 2 */ static inline u32 msg_ack(struct tipc_msg *m) { return msg_bits(m, 2, 16, 0xffff); } |
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static inline void msg_set_ack(struct tipc_msg *m, u32 n) |
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{ msg_set_bits(m, 2, 16, 0xffff, n); } static inline u32 msg_seqno(struct tipc_msg *m) { return msg_bits(m, 2, 0, 0xffff); } |
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static inline void msg_set_seqno(struct tipc_msg *m, u32 n) |
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{ msg_set_bits(m, 2, 0, 0xffff, n); } |
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/* |
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* Words 3-10 */ |
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static inline u32 msg_prevnode(struct tipc_msg *m) { return msg_word(m, 3); } |
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static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) |
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{ msg_set_word(m, 3, a); } |
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static inline u32 msg_origport(struct tipc_msg *m) { return msg_word(m, 4); } |
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static inline void msg_set_origport(struct tipc_msg *m, u32 p) |
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{ msg_set_word(m, 4, p); } |
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static inline u32 msg_destport(struct tipc_msg *m) { return msg_word(m, 5); } |
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static inline void msg_set_destport(struct tipc_msg *m, u32 p) |
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{ msg_set_word(m, 5, p); } |
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static inline u32 msg_mc_netid(struct tipc_msg *m) { return msg_word(m, 5); } |
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static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) |
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{ msg_set_word(m, 5, p); } |
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static inline int msg_short(struct tipc_msg *m) { |
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return msg_hdr_sz(m) == SHORT_H_SIZE; |
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} static inline u32 msg_orignode(struct tipc_msg *m) { if (likely(msg_short(m))) return msg_prevnode(m); return msg_word(m, 6); } |
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static inline void msg_set_orignode(struct tipc_msg *m, u32 a) |
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{ msg_set_word(m, 6, a); } |
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static inline u32 msg_destnode(struct tipc_msg *m) { return msg_word(m, 7); } |
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static inline void msg_set_destnode(struct tipc_msg *m, u32 a) |
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{ msg_set_word(m, 7, a); } |
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static inline int msg_is_dest(struct tipc_msg *m, u32 d) |
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{ |
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return msg_short(m) || (msg_destnode(m) == d); |
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} |
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static inline u32 msg_nametype(struct tipc_msg *m) { return msg_word(m, 8); } |
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static inline void msg_set_nametype(struct tipc_msg *m, u32 n) |
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{ msg_set_word(m, 8, n); } |
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static inline u32 msg_nameinst(struct tipc_msg *m) { return msg_word(m, 9); } static inline u32 msg_namelower(struct tipc_msg *m) { return msg_nameinst(m); } |
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static inline void msg_set_namelower(struct tipc_msg *m, u32 n) |
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{ msg_set_word(m, 9, n); } |
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static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) |
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{ msg_set_namelower(m, n); } |
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static inline u32 msg_nameupper(struct tipc_msg *m) { return msg_word(m, 10); } |
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static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) |
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{ msg_set_word(m, 10, n); } |
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static inline unchar *msg_data(struct tipc_msg *m) { return ((unchar *)m) + msg_hdr_sz(m); } |
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static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m) { return (struct tipc_msg *)msg_data(m); } |
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/* |
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* Constants and routines used to read and write TIPC internal message headers */ |
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/* |
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* Internal message users |
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*/ #define BCAST_PROTOCOL 5 #define MSG_BUNDLER 6 #define LINK_PROTOCOL 7 #define CONN_MANAGER 8 |
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#define ROUTE_DISTRIBUTOR 9 /* obsoleted */ |
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#define CHANGEOVER_PROTOCOL 10 #define NAME_DISTRIBUTOR 11 #define MSG_FRAGMENTER 12 #define LINK_CONFIG 13 |
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/* |
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* Connection management protocol message types |
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*/ #define CONN_PROBE 0 #define CONN_PROBE_REPLY 1 #define CONN_ACK 2 |
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/* |
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* Name distributor message types |
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*/ #define PUBLICATION 0 #define WITHDRAWAL 1 |
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/* * Segmentation message types */ #define FIRST_FRAGMENT 0 #define FRAGMENT 1 #define LAST_FRAGMENT 2 /* * Link management protocol message types */ #define STATE_MSG 0 #define RESET_MSG 1 #define ACTIVATE_MSG 2 /* * Changeover tunnel message types */ #define DUPLICATE_MSG 0 #define ORIGINAL_MSG 1 /* * Config protocol message types */ #define DSC_REQ_MSG 0 #define DSC_RESP_MSG 1 |
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/* |
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* Word 1 */ static inline u32 msg_seq_gap(struct tipc_msg *m) { |
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return msg_bits(m, 1, 16, 0x1fff); |
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} static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) { |
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msg_set_bits(m, 1, 16, 0x1fff, n); |
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} |
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/* |
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* Word 2 */ static inline u32 msg_dest_domain(struct tipc_msg *m) { return msg_word(m, 2); } |
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static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) |
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{ msg_set_word(m, 2, n); } static inline u32 msg_bcgap_after(struct tipc_msg *m) { return msg_bits(m, 2, 16, 0xffff); } static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) { msg_set_bits(m, 2, 16, 0xffff, n); } static inline u32 msg_bcgap_to(struct tipc_msg *m) { return msg_bits(m, 2, 0, 0xffff); } |
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static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) |
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{ msg_set_bits(m, 2, 0, 0xffff, n); } |
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/* |
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* Word 4 */ static inline u32 msg_last_bcast(struct tipc_msg *m) { return msg_bits(m, 4, 16, 0xffff); } static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) { msg_set_bits(m, 4, 16, 0xffff, n); } static inline u32 msg_fragm_no(struct tipc_msg *m) { return msg_bits(m, 4, 16, 0xffff); } static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) { msg_set_bits(m, 4, 16, 0xffff, n); } static inline u32 msg_next_sent(struct tipc_msg *m) { return msg_bits(m, 4, 0, 0xffff); } static inline void msg_set_next_sent(struct tipc_msg *m, u32 n) { msg_set_bits(m, 4, 0, 0xffff, n); } static inline u32 msg_long_msgno(struct tipc_msg *m) { return msg_bits(m, 4, 0, 0xffff); } static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n) { msg_set_bits(m, 4, 0, 0xffff, n); } static inline u32 msg_bc_netid(struct tipc_msg *m) { return msg_word(m, 4); } static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) { msg_set_word(m, 4, id); } static inline u32 msg_link_selector(struct tipc_msg *m) { return msg_bits(m, 4, 0, 1); } static inline void msg_set_link_selector(struct tipc_msg *m, u32 n) { |
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msg_set_bits(m, 4, 0, 1, n); |
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} |
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/* |
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* Word 5 */ static inline u32 msg_session(struct tipc_msg *m) { return msg_bits(m, 5, 16, 0xffff); } static inline void msg_set_session(struct tipc_msg *m, u32 n) { msg_set_bits(m, 5, 16, 0xffff, n); } static inline u32 msg_probe(struct tipc_msg *m) { return msg_bits(m, 5, 0, 1); } static inline void msg_set_probe(struct tipc_msg *m, u32 val) { |
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msg_set_bits(m, 5, 0, 1, val); |
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} static inline char msg_net_plane(struct tipc_msg *m) { return msg_bits(m, 5, 1, 7) + 'A'; } static inline void msg_set_net_plane(struct tipc_msg *m, char n) { msg_set_bits(m, 5, 1, 7, (n - 'A')); } static inline u32 msg_linkprio(struct tipc_msg *m) { return msg_bits(m, 5, 4, 0x1f); } static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) { msg_set_bits(m, 5, 4, 0x1f, n); } static inline u32 msg_bearer_id(struct tipc_msg *m) { return msg_bits(m, 5, 9, 0x7); } static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) { msg_set_bits(m, 5, 9, 0x7, n); } static inline u32 msg_redundant_link(struct tipc_msg *m) { return msg_bits(m, 5, 12, 0x1); } |
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static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r) |
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{ |
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msg_set_bits(m, 5, 12, 0x1, r); |
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} |
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static inline char *msg_media_addr(struct tipc_msg *m) { return (char *)&m->hdr[TIPC_MEDIA_ADDR_OFFSET]; } |
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/* |
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* Word 9 */ static inline u32 msg_msgcnt(struct tipc_msg *m) { return msg_bits(m, 9, 16, 0xffff); } static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n) { msg_set_bits(m, 9, 16, 0xffff, n); } static inline u32 msg_bcast_tag(struct tipc_msg *m) { return msg_bits(m, 9, 16, 0xffff); } static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n) { msg_set_bits(m, 9, 16, 0xffff, n); } |
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static inline u32 msg_max_pkt(struct tipc_msg *m) |
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{ |
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return msg_bits(m, 9, 16, 0xffff) * 4; |
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} |
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static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) |
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{ msg_set_bits(m, 9, 16, 0xffff, (n / 4)); } static inline u32 msg_link_tolerance(struct tipc_msg *m) { return msg_bits(m, 9, 0, 0xffff); } static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) { msg_set_bits(m, 9, 0, 0xffff, n); } |
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u32 tipc_msg_tot_importance(struct tipc_msg *m); void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, u32 hsize, u32 destnode); |
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int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect, u32 num_sect, unsigned int total_len, |
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int max_size, int usrmem, struct sk_buff **buf); |
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#endif |