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1 | /* |
2 | * include/net/tipc/tipc_bearer.h: Include file for privileged access to TIPC bearers | |
3 | * | |
4 | * Copyright (c) 2003-2005, Ericsson Research Canada | |
5 | * Copyright (c) 2005, Wind River Systems | |
6 | * Copyright (c) 2005-2006, Ericsson AB | |
7 | * All rights reserved. | |
8 | * | |
9ea1fd3c | 9 | * Redistribution and use in source and binary forms, with or without |
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10 | * modification, are permitted provided that the following conditions are met: |
11 | * | |
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12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the names of the copyright holders nor the names of its | |
18 | * contributors may be used to endorse or promote products derived from | |
19 | * this software without specific prior written permission. | |
b97bf3fd | 20 | * |
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21 | * Alternatively, this software may be distributed under the terms of the |
22 | * GNU General Public License ("GPL") version 2 as published by the Free | |
23 | * Software Foundation. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
26 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
29 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
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35 | * POSSIBILITY OF SUCH DAMAGE. |
36 | */ | |
37 | ||
38 | #ifndef _NET_TIPC_BEARER_H_ | |
39 | #define _NET_TIPC_BEARER_H_ | |
40 | ||
41 | #ifdef __KERNEL__ | |
42 | ||
ea714ccd | 43 | #include <linux/tipc_config.h> |
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44 | #include <linux/skbuff.h> |
45 | #include <linux/spinlock.h> | |
46 | ||
ea714ccd PL |
47 | /* |
48 | * Identifiers of supported TIPC media types | |
49 | */ | |
50 | ||
51 | #define TIPC_MEDIA_TYPE_ETH 1 | |
52 | ||
53 | struct tipc_media_addr { | |
54 | __u32 type; | |
55 | union { | |
56 | __u8 eth_addr[6]; /* Ethernet bearer */ | |
57 | #if 0 | |
58 | /* Prototypes for other possible bearer types */ | |
59 | ||
60 | struct { | |
61 | __u16 sin_family; | |
62 | __u16 sin_port; | |
63 | struct { | |
64 | __u32 s_addr; | |
65 | } sin_addr; | |
66 | char pad[4]; | |
67 | } addr_in; /* IP-based bearer */ | |
68 | __u16 sock_descr; /* generic socket bearer */ | |
69 | #endif | |
70 | } dev_addr; | |
71 | }; | |
72 | ||
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73 | /** |
74 | * struct tipc_bearer - TIPC bearer info available to privileged users | |
75 | * @usr_handle: pointer to additional user-defined information about bearer | |
76 | * @mtu: max packet size bearer can support | |
77 | * @blocked: non-zero if bearer is blocked | |
78 | * @lock: spinlock for controlling access to bearer | |
79 | * @addr: media-specific address associated with bearer | |
80 | * @name: bearer name (format = media:interface) | |
81 | * | |
82 | * Note: TIPC initializes "name" and "lock" fields; user is responsible for | |
83 | * initialization all other fields when a bearer is enabled. | |
84 | */ | |
85 | ||
86 | struct tipc_bearer { | |
87 | void *usr_handle; | |
88 | u32 mtu; | |
89 | int blocked; | |
90 | spinlock_t lock; | |
91 | struct tipc_media_addr addr; | |
92 | char name[TIPC_MAX_BEARER_NAME]; | |
93 | }; | |
94 | ||
95 | ||
96 | int tipc_register_media(u32 media_type, | |
97 | char *media_name, | |
98 | int (*enable)(struct tipc_bearer *), | |
99 | void (*disable)(struct tipc_bearer *), | |
100 | int (*send_msg)(struct sk_buff *, | |
101 | struct tipc_bearer *, | |
102 | struct tipc_media_addr *), | |
103 | char *(*addr2str)(struct tipc_media_addr *a, | |
104 | char *str_buf, | |
105 | int str_size), | |
106 | struct tipc_media_addr *bcast_addr, | |
107 | const u32 bearer_priority, | |
108 | const u32 link_tolerance, /* [ms] */ | |
109 | const u32 send_window_limit); | |
110 | ||
111 | void tipc_recv_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr); | |
112 | ||
113 | int tipc_block_bearer(const char *name); | |
114 | void tipc_continue(struct tipc_bearer *tb_ptr); | |
115 | ||
116 | int tipc_enable_bearer(const char *bearer_name, u32 bcast_scope, u32 priority); | |
117 | int tipc_disable_bearer(const char *name); | |
118 | ||
119 | ||
120 | #endif | |
121 | ||
122 | #endif |