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3e6c8cd566
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
223 lines
6.4 KiB
C
223 lines
6.4 KiB
C
/*
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* include/net/tipc/tipc_msg.h: Include file for privileged access to TIPC message headers
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*
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* Copyright (c) 2003-2006, Ericsson AB
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* Copyright (c) 2005, 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 _NET_TIPC_MSG_H_
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#define _NET_TIPC_MSG_H_
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#ifdef __KERNEL__
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struct tipc_msg {
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__be32 hdr[15];
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};
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/*
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TIPC user data message header format, version 2:
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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
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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w0:|vers | user |hdr sz |n|d|s|-| message size |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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w1:|mstyp| error |rer cnt|lsc|opt p| broadcast ack no |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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w2:| link level ack no | broadcast/link level seq no |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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w3:| previous node |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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w4:| originating port |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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w5:| destination port |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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w6:| originating node |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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w7:| destination node |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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w8:| name type / transport sequence number |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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w9:| name instance/multicast lower bound |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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wA:| multicast upper bound |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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/ /
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\ options \
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/ /
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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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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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 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 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 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 int msg_short(struct tipc_msg *m)
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{
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return (msg_hdr_sz(m) == 24);
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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 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 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 u32 msg_direct(struct tipc_msg *m)
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{
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return (msg_type(m) == TIPC_DIRECT_MSG);
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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 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 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 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 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 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 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 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 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 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 char *msg_options(struct tipc_msg *m, u32 *len)
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{
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u32 pos = msg_bits(m, 1, 16, 0x7);
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if (!pos)
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return 0;
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pos = (pos * 4) + 28;
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*len = msg_hdr_sz(m) - pos;
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return (char *)&m->hdr[pos/4];
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}
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#endif
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#endif
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