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1 | /* |
2 | * net/tipc/addr.h: Include file for TIPC address utility routines | |
3 | * | |
4 | * Copyright (c) 2003-2005, Ericsson Research Canada | |
5 | * Copyright (c) 2004-2005, 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 _TIPC_ADDR_H | |
39 | #define _TIPC_ADDR_H | |
40 | ||
41 | static inline u32 own_node(void) | |
42 | { | |
43 | return tipc_node(tipc_own_addr); | |
44 | } | |
45 | ||
46 | static inline u32 own_cluster(void) | |
47 | { | |
48 | return tipc_cluster(tipc_own_addr); | |
49 | } | |
50 | ||
51 | static inline u32 own_zone(void) | |
52 | { | |
53 | return tipc_zone(tipc_own_addr); | |
54 | } | |
55 | ||
56 | static inline int in_own_cluster(u32 addr) | |
57 | { | |
58 | return !((addr ^ tipc_own_addr) >> 12); | |
59 | } | |
60 | ||
61 | static inline int in_own_zone(u32 addr) | |
62 | { | |
63 | return !((addr ^ tipc_own_addr) >> 24); | |
64 | } | |
65 | ||
66 | static inline int is_slave(u32 addr) | |
67 | { | |
68 | return addr & 0x800; | |
69 | } | |
70 | ||
71 | static inline int may_route(u32 addr) | |
72 | { | |
73 | return(addr ^ tipc_own_addr) >> 11; | |
74 | } | |
75 | ||
76 | static inline int in_scope(u32 domain, u32 addr) | |
77 | { | |
78 | if (!domain || (domain == addr)) | |
79 | return 1; | |
80 | if (domain == (addr & 0xfffff000u)) /* domain <Z.C.0> */ | |
81 | return 1; | |
82 | if (domain == (addr & 0xff000000u)) /* domain <Z.0.0> */ | |
83 | return 1; | |
84 | return 0; | |
85 | } | |
86 | ||
87 | /** | |
88 | * addr_scope - convert message lookup domain to equivalent 2-bit scope value | |
89 | */ | |
90 | ||
91 | static inline int addr_scope(u32 domain) | |
92 | { | |
93 | if (likely(!domain)) | |
94 | return TIPC_ZONE_SCOPE; | |
95 | if (tipc_node(domain)) | |
96 | return TIPC_NODE_SCOPE; | |
97 | if (tipc_cluster(domain)) | |
98 | return TIPC_CLUSTER_SCOPE; | |
99 | return TIPC_ZONE_SCOPE; | |
100 | } | |
101 | ||
102 | /** | |
103 | * addr_domain - convert 2-bit scope value to equivalent message lookup domain | |
104 | * | |
105 | * Needed when address of a named message must be looked up a second time | |
106 | * after a network hop. | |
107 | */ | |
108 | ||
109 | static inline int addr_domain(int sc) | |
110 | { | |
111 | if (likely(sc == TIPC_NODE_SCOPE)) | |
112 | return tipc_own_addr; | |
113 | if (sc == TIPC_CLUSTER_SCOPE) | |
114 | return tipc_addr(tipc_zone(tipc_own_addr), | |
115 | tipc_cluster(tipc_own_addr), 0); | |
116 | return tipc_addr(tipc_zone(tipc_own_addr), 0, 0); | |
117 | } | |
118 | ||
119 | static inline char *addr_string_fill(char *string, u32 addr) | |
120 | { | |
121 | snprintf(string, 16, "<%u.%u.%u>", | |
122 | tipc_zone(addr), tipc_cluster(addr), tipc_node(addr)); | |
123 | return string; | |
124 | } | |
125 | ||
126 | int addr_domain_valid(u32); | |
127 | int addr_node_valid(u32 addr); | |
128 | ||
129 | #endif |