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