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+/*
+ * net/tipc/bearer.h: Include file for TIPC bearer code
+ *
+ * Copyright (c) 1996-2006, 2013-2014, Ericsson AB
+ * Copyright (c) 2005, 2010-2011, 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_BEARER_H
+#define _TIPC_BEARER_H
+
+#include "netlink.h"
+#include <net/genetlink.h>
+
+#define MAX_BEARERS 2
+#define MAX_MEDIA 3
+#define MAX_NODES 4096
+#define WSIZE 32
+
+/* Identifiers associated with TIPC message header media address info
+ * - address info field is 32 bytes long
+ * - the field's actual content and length is defined per media
+ * - remaining unused bytes in the field are set to zero
+ */
+#define TIPC_MEDIA_INFO_SIZE 32
+#define TIPC_MEDIA_TYPE_OFFSET 3
+#define TIPC_MEDIA_ADDR_OFFSET 4
+
+/*
+ * Identifiers of supported TIPC media types
+ */
+#define TIPC_MEDIA_TYPE_ETH 1
+#define TIPC_MEDIA_TYPE_IB 2
+#define TIPC_MEDIA_TYPE_UDP 3
+
+/**
+ * struct tipc_node_map - set of node identifiers
+ * @count: # of nodes in set
+ * @map: bitmap of node identifiers that are in the set
+ */
+struct tipc_node_map {
+ u32 count;
+ u32 map[MAX_NODES / WSIZE];
+};
+
+/**
+ * struct tipc_media_addr - destination address used by TIPC bearers
+ * @value: address info (format defined by media)
+ * @media_id: TIPC media type identifier
+ * @broadcast: non-zero if address is a broadcast address
+ */
+struct tipc_media_addr {
+ u8 value[TIPC_MEDIA_INFO_SIZE];
+ u8 media_id;
+ u8 broadcast;
+};
+
+struct tipc_bearer;
+
+/**
+ * struct tipc_media - Media specific info exposed to generic bearer layer
+ * @send_msg: routine which handles buffer transmission
+ * @enable_media: routine which enables a media
+ * @disable_media: routine which disables a media
+ * @addr2str: convert media address format to string
+ * @addr2msg: convert from media addr format to discovery msg addr format
+ * @msg2addr: convert from discovery msg addr format to media addr format
+ * @raw2addr: convert from raw addr format to media addr format
+ * @priority: default link (and bearer) priority
+ * @tolerance: default time (in ms) before declaring link failure
+ * @window: default window (in packets) before declaring link congestion
+ * @type_id: TIPC media identifier
+ * @hwaddr_len: TIPC media address len
+ * @name: media name
+ */
+struct tipc_media {
+ int (*send_msg)(struct net *net, struct sk_buff *buf,
+ struct tipc_bearer *b_ptr,
+ struct tipc_media_addr *dest);
+ int (*enable_media)(struct net *net, struct tipc_bearer *b_ptr,
+ struct nlattr *attr[]);
+ void (*disable_media)(struct tipc_bearer *b_ptr);
+ int (*addr2str)(struct tipc_media_addr *addr,
+ char *strbuf,
+ int bufsz);
+ int (*addr2msg)(char *msg, struct tipc_media_addr *addr);
+ int (*msg2addr)(struct tipc_bearer *b,
+ struct tipc_media_addr *addr,
+ char *msg);
+ int (*raw2addr)(struct tipc_bearer *b,
+ struct tipc_media_addr *addr,
+ char *raw);
+ u32 priority;
+ u32 tolerance;
+ u32 window;
+ u32 type_id;
+ u32 hwaddr_len;
+ char name[TIPC_MAX_MEDIA_NAME];
+};
+
+/**
+ * struct tipc_bearer - Generic TIPC bearer structure
+ * @media_ptr: pointer to additional media-specific information about bearer
+ * @mtu: max packet size bearer can support
+ * @addr: media-specific address associated with bearer
+ * @name: bearer name (format = media:interface)
+ * @media: ptr to media structure associated with bearer
+ * @bcast_addr: media address used in broadcasting
+ * @rcu: rcu struct for tipc_bearer
+ * @priority: default link priority for bearer
+ * @window: default window size for bearer
+ * @tolerance: default link tolerance for bearer
+ * @domain: network domain to which links can be established
+ * @identity: array index of this bearer within TIPC bearer array
+ * @link_req: ptr to (optional) structure making periodic link setup requests
+ * @net_plane: network plane ('A' through 'H') currently associated with bearer
+ * @nodes: indicates which nodes in cluster can be reached through bearer
+ *
+ * Note: media-specific code is responsible for initialization of the fields
+ * indicated below when a bearer is enabled; TIPC's generic bearer code takes
+ * care of initializing all other fields.
+ */
+struct tipc_bearer {
+ void __rcu *media_ptr; /* initalized by media */
+ u32 mtu; /* initalized by media */
+ struct tipc_media_addr addr; /* initalized by media */
+ char name[TIPC_MAX_BEARER_NAME];
+ struct tipc_media *media;
+ struct tipc_media_addr bcast_addr;
+ struct rcu_head rcu;
+ u32 priority;
+ u32 window;
+ u32 tolerance;
+ u32 domain;
+ u32 identity;
+ struct tipc_link_req *link_req;
+ char net_plane;
+ struct tipc_node_map nodes;
+};
+
+struct tipc_bearer_names {
+ char media_name[TIPC_MAX_MEDIA_NAME];
+ char if_name[TIPC_MAX_IF_NAME];
+};
+
+/*
+ * TIPC routines available to supported media types
+ */
+
+void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr);
+
+/*
+ * Routines made available to TIPC by supported media types
+ */
+extern struct tipc_media eth_media_info;
+
+#ifdef CONFIG_TIPC_MEDIA_IB
+extern struct tipc_media ib_media_info;
+#endif
+#ifdef CONFIG_TIPC_MEDIA_UDP
+extern struct tipc_media udp_media_info;
+#endif
+
+int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info);
+int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info);
+int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb);
+int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info);
+int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info);
+
+int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb);
+int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info);
+int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info);
+
+int tipc_media_set_priority(const char *name, u32 new_value);
+int tipc_media_set_window(const char *name, u32 new_value);
+void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a);
+int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
+ struct nlattr *attrs[]);
+void tipc_disable_l2_media(struct tipc_bearer *b);
+int tipc_l2_send_msg(struct net *net, struct sk_buff *buf,
+ struct tipc_bearer *b, struct tipc_media_addr *dest);
+
+void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest);
+void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest);
+struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name);
+struct tipc_media *tipc_media_find(const char *name);
+int tipc_bearer_setup(void);
+void tipc_bearer_cleanup(void);
+void tipc_bearer_stop(struct net *net);
+void tipc_bearer_send(struct net *net, u32 bearer_id, struct sk_buff *buf,
+ struct tipc_media_addr *dest);
+
+#endif /* _TIPC_BEARER_H */