/*
* 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 <net/tipc/tipc_msg.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)
{
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)
{
msg_set_bits(m, 4, 0, 1, (n & 1));
}
/*
* 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 & 1));
}
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)
{
msg_set_bits(m, 5, 12, 0x1, 1);
}
static inline void msg_clear_redundant_link(struct tipc_msg *m)
{
msg_set_bits(m, 5, 12, 0x1, 0);
}
/*
* 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);
}
/*
* Routing table message data
*/
static inline u32 msg_remote_node(struct tipc_msg *m)
{
return msg_word(m, msg_hdr_sz(m)/4);
}
static inline void msg_set_remote_node(struct tipc_msg *m, u32 a)
{
msg_set_word(m, msg_hdr_sz(m)/4, a);
}
static inline int msg_dataoctet(struct tipc_msg *m, u32 pos)
{
return(msg_data(m)[pos + 4] != 0);
}
static inline void msg_set_dataoctet(struct tipc_msg *m, u32 pos)
{
msg_data(m)[pos + 4] = 1;
}
/*
* 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
/*
* Routing table message types
*/
#define EXT_ROUTING_TABLE 0
#define LOCAL_ROUTING_TABLE 1
#define SLAVE_ROUTING_TABLE 2
#define ROUTE_ADDITION 3
#define ROUTE_REMOVAL 4
/*
* Config protocol message types
*/
#define DSC_REQ_MSG 0
#define DSC_RESP_MSG 1
static inline u32 msg_tot_importance(struct tipc_msg *m)
{
if (likely(msg_isdata(m))) {
if (likely(msg_orignode(m) == tipc_own_addr))
return msg_importance(m);
return msg_importance(m) + 4;
}
if ((msg_user(m) == MSG_FRAGMENTER) &&
(msg_type(m) == FIRST_FRAGMENT))
return msg_importance(msg_get_wrapped(m));
return msg_importance(m);
}
static inline void msg_init(struct tipc_msg *m, u32 user, u32 type,
u32 err, u32 hsize, u32 destnode)
{
memset(m, 0, hsize);
msg_set_version(m);
msg_set_user(m, user);
msg_set_hdr_sz(m, hsize);
msg_set_size(m, hsize);
msg_set_prevnode(m, tipc_own_addr);
msg_set_type(m, type);
msg_set_errcode(m, err);
if (!msg_short(m)) {
msg_set_orignode(m, tipc_own_addr);
msg_set_destnode(m, destnode);
}
}
/**
* msg_calc_data_size - determine total data size for message
*/
static inline int msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect)
{
int dsz = 0;
int i;
for (i = 0; i < num_sect; i++)
dsz += msg_sect[i].iov_len;
return dsz;
}
/**
* msg_build - create message using specified header and data
*
* Note: Caller must not hold any locks in case copy_from_user() is interrupted!
*
* Returns message data size or errno
*/
static inline int msg_build(struct tipc_msg *hdr,
struct iovec const *msg_sect, u32 num_sect,
int max_size, int usrmem, struct sk_buff** buf)
{
int dsz, sz, hsz, pos, res, cnt;
dsz = msg_calc_data_size(msg_sect, num_sect);
if (unlikely(dsz > TIPC_MAX_USER_MSG_SIZE)) {
*buf = NULL;
return -EINVAL;
}
pos = hsz = msg_hdr_sz(hdr);
sz = hsz + dsz;
msg_set_size(hdr, sz);
if (unlikely(sz > max_size)) {
*buf = NULL;
return dsz;
}
*buf = buf_acquire(sz);
if (!(*buf))
return -ENOMEM;
memcpy((*buf)->data, (unchar *)hdr, hsz);
for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) {
if (likely(usrmem))
res = !copy_from_user((*buf)->data + pos,
msg_sect[cnt].iov_base,
msg_sect[cnt].iov_len);
else
memcpy((*buf)->data + pos, msg_sect[cnt].iov_base,
msg_sect[cnt].iov_len);
pos += msg_sect[cnt].iov_len;
}
if (likely(res))
return dsz;
buf_discard(*buf);
*buf = NULL;
return -EFAULT;
}
struct tipc_media_addr;
extern void msg_set_media_addr(struct tipc_msg *m,
struct tipc_media_addr *a);
extern void msg_get_media_addr(struct tipc_msg *m,
struct tipc_media_addr *a);
#endif
