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/*
* include/net/tipc/tipc_bearer.h: Include file for privileged access to TIPC bearers
*
* 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_BEARER_H_
#define _NET_TIPC_BEARER_H_
#ifdef __KERNEL__
#include <linux/tipc_config.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
/*
* Identifiers of supported TIPC media types
*/
#define TIPC_MEDIA_TYPE_ETH 1
/*
* Destination address structure used by TIPC bearers when sending messages
*
* IMPORTANT: The fields of this structure MUST be stored using the specified
* byte order indicated below, as the structure is exchanged between nodes
* as part of a link setup process.
*/
struct tipc_media_addr {
__be32 type; /* bearer type (network byte order) */
union {
__u8 eth_addr[6]; /* 48 bit Ethernet addr (byte array) */
#if 0
/* Prototypes for other possible bearer types */
struct {
__u16 sin_family;
__u16 sin_port;
struct {
__u32 s_addr;
} sin_addr;
char pad[4];
} addr_in; /* IP-based bearer */
__u16 sock_descr; /* generic socket bearer */
#endif
} dev_addr;
};
/**
* struct tipc_bearer - TIPC bearer info available to privileged users
* @usr_handle: pointer to additional user-defined information about bearer
* @mtu: max packet size bearer can support
* @blocked: non-zero if bearer is blocked
* @lock: spinlock for controlling access to bearer
* @addr: media-specific address associated with bearer
* @name: bearer name (format = media:interface)
*
* Note: TIPC initializes "name" and "lock" fields; user is responsible for
* initialization all other fields when a bearer is enabled.
*/
struct tipc_bearer {
void *usr_handle;
u32 mtu;
int blocked;
spinlock_t lock;
struct tipc_media_addr addr;
char name[TIPC_MAX_BEARER_NAME];
};
/*
* TIPC routines available to supported media types
*/
int tipc_register_media(u32 media_type,
char *media_name,
int (*enable)(struct tipc_bearer *),
void (*disable)(struct tipc_bearer *),
int (*send_msg)(struct sk_buff *,
struct tipc_bearer *,
struct tipc_media_addr *),
char *(*addr2str)(struct tipc_media_addr *a,
char *str_buf,
int str_size),
struct tipc_media_addr *bcast_addr,
const u32 bearer_priority,
const u32 link_tolerance, /* [ms] */
const u32 send_window_limit);
void tipc_recv_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr);
int tipc_block_bearer(const char *name);
void tipc_continue(struct tipc_bearer *tb_ptr);
int tipc_enable_bearer(const char *bearer_name, u32 bcast_scope, u32 priority);
int tipc_disable_bearer(const char *name);
/*
* Routines made available to TIPC by supported media types
*/
int tipc_eth_media_start(void);
void tipc_eth_media_stop(void);
#endif
#endif
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