/* * include/net/tipc/tipc_msg.h: Include file for privileged access to TIPC message headers *  * Copyright (c) 2003-2006, Ericsson AB * Copyright (c) 2005, Wind River Systems * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 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. * * 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 * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _NET_TIPC_MSG_H_#define _NET_TIPC_MSG_H_ #ifdef __KERNEL__ struct tipc_msg {	__be32 hdr[15];};  /*		TIPC user data message header format, version 2:         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       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w0:|vers | user  |hdr sz |n|d|s|-|          message size           |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w1:|mstyp| error |rer cnt|lsc|opt p|      broadcast ack no         |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w2:|        link level ack no      |   broadcast/link level seq no |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w3:|                       previous node                           |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w4:|                      originating port                         |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w5:|                      destination port                         |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+       w6:|                      originating node                         |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w7:|                      destination node                         |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w8:|            name type / transport sequence number              |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w9:|              name instance/multicast lower bound              |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+       wA:|                    multicast upper bound                      |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+          /                                                               /      \                           options                             \      /                                                               /      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ #define TIPC_CONN_MSG	0#define TIPC_MCAST_MSG	1#define TIPC_NAMED_MSG	2#define TIPC_DIRECT_MSG	3  static inline u32 msg_word(struct tipc_msg *m, u32 pos){	return ntohl(m->hdr[pos]);} static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask){	return (msg_word(m, w) >> pos) & mask;} static inline u32 msg_importance(struct tipc_msg *m){	return msg_bits(m, 0, 25, 0xf);} static inline u32 msg_hdr_sz(struct tipc_msg *m){	return msg_bits(m, 0, 21, 0xf) << 2;} static inline int msg_short(struct tipc_msg *m){	return (msg_hdr_sz(m) == 24);} 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));} static inline unchar *msg_data(struct tipc_msg *m){	return ((unchar *)m) + msg_hdr_sz(m);} static inline u32 msg_type(struct tipc_msg *m){	return msg_bits(m, 1, 29, 0x7);} static inline u32 msg_direct(struct tipc_msg *m){	return (msg_type(m) == TIPC_DIRECT_MSG);} 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);} static inline u32 msg_prevnode(struct tipc_msg *m){	return msg_word(m, 3);} static inline u32 msg_origport(struct tipc_msg *m){	return msg_word(m, 4);} static inline u32 msg_destport(struct tipc_msg *m){	return msg_word(m, 5);} static inline u32 msg_mc_netid(struct tipc_msg *m){	return msg_word(m, 5);} static inline u32 msg_orignode(struct tipc_msg *m){	if (likely(msg_short(m)))		return msg_prevnode(m);	return msg_word(m, 6);} static inline u32 msg_destnode(struct tipc_msg *m){	return msg_word(m, 7);} static inline u32 msg_nametype(struct tipc_msg *m){	return msg_word(m, 8);} 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);} static inline u32 msg_nameupper(struct tipc_msg *m){	return msg_word(m, 10);} static inline char *msg_options(struct tipc_msg *m, u32 *len){	u32 pos = msg_bits(m, 1, 16, 0x7); 	if (!pos)		return 0;	pos = (pos * 4) + 28;	*len = msg_hdr_sz(m) - pos;	return (char *)&m->hdr[pos/4];} #endif #endif