/* * net/tipc/msg.h: Include file for TIPC message header routines *  * Copyright (c) 2000-2006, 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 _TIPC_MSG_H#define _TIPC_MSG_H #include "core.h" #define TIPC_VERSION              2#define DATA_LOW                  TIPC_LOW_IMPORTANCE#define DATA_MEDIUM               TIPC_MEDIUM_IMPORTANCE#define DATA_HIGH                 TIPC_HIGH_IMPORTANCE#define DATA_CRITICAL             TIPC_CRITICAL_IMPORTANCE#define SHORT_H_SIZE              24	/* Connected,in cluster */#define DIR_MSG_H_SIZE            32	/* Directly addressed messages */#define CONN_MSG_H_SIZE           36	/* Routed connected msgs*/#define LONG_H_SIZE               40	/* Named Messages */#define MCAST_H_SIZE              44	/* Multicast messages */#define MAX_H_SIZE                60	/* Inclusive full options */#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)#define LINK_CONFIG               13  /*		TIPC user data message header format, version 2			- Fundamental definitions available to privileged TIPC users	  are located in tipc_msg.h.	- Remaining definitions available to TIPC internal users appear below. */  static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val){	m->hdr[w] = htonl(val);} static inline void msg_set_bits(struct tipc_msg *m, u32 w,				u32 pos, u32 mask, u32 val){	u32 word = msg_word(m,w) & ~(mask << pos);	msg_set_word(m, w, (word |= (val << pos)));} /*  * Word 0 */ static inline u32 msg_version(struct tipc_msg *m){	return msg_bits(m, 0, 29, 7);} static inline void msg_set_version(struct tipc_msg *m) {	msg_set_bits(m, 0, 29, 0xf, TIPC_VERSION);} 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){	return (msg_user(m) <= DATA_CRITICAL);} static inline void msg_set_user(struct tipc_msg *m, u32 n) {	msg_set_bits(m, 0, 25, 0xf, n);} static inline void msg_set_importance(struct tipc_msg *m, u32 i) {	msg_set_user(m, i);} static inline void msg_set_hdr_sz(struct tipc_msg *m,u32 n) {	msg_set_bits(m, 0, 21, 0xf, n>>2);} static inline int msg_non_seq(struct tipc_msg *m) {	return msg_bits(m, 0, 20, 1);} static inline void msg_set_non_seq(struct tipc_msg *m) {	msg_set_bits(m, 0, 20, 1, 1);} static inline int msg_dest_droppable(struct tipc_msg *m) {	return msg_bits(m, 0, 19, 1);} static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) {	msg_set_bits(m, 0, 19, 1, d);} static inline int msg_src_droppable(struct tipc_msg *m) {	return msg_bits(m, 0, 18, 1);} static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) {	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);}  /*  * Word 1 */ static inline void msg_set_type(struct tipc_msg *m, u32 n) {	msg_set_bits(m, 1, 29, 0x7, n);} static inline void msg_set_errcode(struct tipc_msg *m, u32 err) {	msg_set_bits(m, 1, 25, 0xf, err);} static inline u32 msg_reroute_cnt(struct tipc_msg *m) {	return msg_bits(m, 1, 21, 0xf);} static inline void msg_incr_reroute_cnt(struct tipc_msg *m) {	msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);} static inline void msg_reset_reroute_cnt(struct tipc_msg *m) {	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);} static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) {	msg_set_bits(m, 1, 19, 0x3, n);} static inline void msg_set_options(struct tipc_msg *m, const char *opt, u32 sz) {	u32 hsz = msg_hdr_sz(m);	char *to = (char *)&m->hdr[hsz/4]; 	if ((hsz < DIR_MSG_H_SIZE) || ((hsz + sz) > MAX_H_SIZE))		return;	msg_set_bits(m, 1, 16, 0x7, (hsz - 28)/4);	msg_set_hdr_sz(m, hsz + sz);	memcpy(to, opt, sz);} static inline u32 msg_bcast_ack(struct tipc_msg *m){	return msg_bits(m, 1, 0, 0xffff);} static inline void msg_set_bcast_ack(struct tipc_msg *m, u32 n) {	msg_set_bits(m, 1, 0, 0xffff, n);}  /*  * Word 2 */ static inline u32 msg_ack(struct tipc_msg *m){	return msg_bits(m, 2, 16, 0xffff);} static inline void msg_set_ack(struct tipc_msg *m, u32 n) {	msg_set_bits(m, 2, 16, 0xffff, n);} static inline u32 msg_seqno(struct tipc_msg *m){	return msg_bits(m, 2, 0, 0xffff);} static inline void msg_set_seqno(struct tipc_msg *m, u32 n) {	msg_set_bits(m, 2, 0, 0xffff, n);}  /*  * Words 3-10 */  static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) {	msg_set_word(m, 3, a);} static inline void msg_set_origport(struct tipc_msg *m, u32 p) {	msg_set_word(m, 4, p);} static inline void msg_set_destport(struct tipc_msg *m, u32 p) {	msg_set_word(m, 5, p);} static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) {	msg_set_word(m, 5, p);} static inline void msg_set_orignode(struct tipc_msg *m, u32 a) {	msg_set_word(m, 6, a);} static inline void msg_set_destnode(struct tipc_msg *m, u32 a) {	msg_set_word(m, 7, a);} static inline int msg_is_dest(struct tipc_msg *m, u32 d) {	return(msg_short(m) || (msg_destnode(m) == d));} static inline u32 msg_routed(struct tipc_msg *m){	if (likely(msg_short(m)))		return 0;	return(msg_destnode(m) ^ msg_orignode(m)) >> 11;} static inline void msg_set_nametype(struct tipc_msg *m, u32 n) {	msg_set_word(m, 8, n);} static inline u32 msg_transp_seqno(struct tipc_msg *m){	return msg_word(m, 8);} static inline void msg_set_timestamp(struct tipc_msg *m, u32 n){	msg_set_word(m, 8, n);} static inline u32 msg_timestamp(struct tipc_msg *m){	return msg_word(m, 8);} static inline void msg_set_transp_seqno(struct tipc_msg *m, u32 n){	msg_set_word(m, 8, n);} static inline void msg_set_namelower(struct tipc_msg *m, u32 n) {	msg_set_word(m, 9, n);} static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) {	msg_set_namelower(m, n);} static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) {	msg_set_word(m, 10, n);} static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m){	return (struct tipc_msg *)msg_data(m);} static inline void msg_expand(struct tipc_msg *m, u32 destnode) {	if (!msg_short(m))		return;	msg_set_hdr_sz(m, LONG_H_SIZE);	msg_set_orignode(m, msg_prevnode(m));	msg_set_destnode(m, destnode);	memset(&m->hdr[8], 0, 12);}   /*		TIPC internal 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 |msg usr|hdr sz |n|resrv|            packet size          |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w1:|m typ|rsv=0|   sequence gap    |       broadcast ack no        |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w2:| link level ack no/bc_gap_from |     seq no / bcast_gap_to     |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w3:|                       previous node                           |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w4:|  next sent broadcast/fragm no | next sent pkt/ fragm msg no   |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w5:|          session no           |rsv=0|r|berid|link prio|netpl|p|      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w6:|                      originating node                         |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w7:|                      destination node                         |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w8:|                   transport sequence number                   |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   w9:|   msg count / bcast tag       |       link tolerance          |      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+      \                                                               \      /                     User Specific Data                        /      \                                                               \      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+       NB: CONN_MANAGER use data message format. LINK_CONFIG has own format.*/    /*  * Internal users */ #define  BCAST_PROTOCOL       5#define  MSG_BUNDLER          6#define  LINK_PROTOCOL        7#define  CONN_MANAGER         8#define  ROUTE_DISTRIBUTOR    9#define  CHANGEOVER_PROTOCOL  10#define  NAME_DISTRIBUTOR     11#define  MSG_FRAGMENTER       12#define  LINK_CONFIG          13#define  INT_H_SIZE           40#define  DSC_H_SIZE           40 /*  *  Connection management protocol messages */ #define CONN_PROBE        0#define CONN_PROBE_REPLY  1#define CONN_ACK          2 /*  * Name distributor messages */ #define PUBLICATION       0#define WITHDRAWAL        1  /*  * Word 1 */ static inline u32 msg_seq_gap(struct tipc_msg *m){	return msg_bits(m, 1, 16, 0xff);} static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n){	msg_set_bits(m, 1, 16, 0xff, n);} static inline u32 msg_req_links(struct tipc_msg *m){	return msg_bits(m, 1, 16, 0xfff);} static inline void msg_set_req_links(struct tipc_msg *m, u32 n) {	msg_set_bits(m, 1, 16, 0xfff, n);}  /*  * Word 2 */ static inline u32 msg_dest_domain(struct tipc_msg *m){	return msg_word(m, 2);} static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) {	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);} static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) {	msg_set_bits(m, 2, 0, 0xffff, n);}  /*  * 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)

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