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1 | /* |
2 | * net/tipc/addr.c: TIPC address utility routines |
3 | * |
4 | * Copyright (c) 2000-2006, Ericsson AB |
5 | * Copyright (c) 2004-2005, 2010-2011, Wind River Systems |
6 | * All rights reserved. |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. |
13 | * 2. Redistributions in binary form must reproduce the above copyright |
14 | * notice, this list of conditions and the following disclaimer in the |
15 | * documentation and/or other materials provided with the distribution. |
16 | * 3. Neither the names of the copyright holders nor the names of its |
17 | * contributors may be used to endorse or promote products derived from |
18 | * this software without specific prior written permission. |
19 | * |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free |
22 | * Software Foundation. |
23 | * |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ |
36 | |
37 | #include "core.h" |
38 | #include "addr.h" |
39 | |
40 | /** |
41 | * tipc_addr_domain_valid - validates a network domain address |
42 | * |
43 | * Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>, |
44 | * where Z, C, and N are non-zero. |
45 | * |
46 | * Returns 1 if domain address is valid, otherwise 0 |
47 | */ |
48 | |
49 | int tipc_addr_domain_valid(u32 addr) |
50 | { |
51 | u32 n = tipc_node(addr); |
52 | u32 c = tipc_cluster(addr); |
53 | u32 z = tipc_zone(addr); |
54 | |
55 | if (n && (!z || !c)) |
56 | return 0; |
57 | if (c && !z) |
58 | return 0; |
59 | return 1; |
60 | } |
61 | |
62 | /** |
63 | * tipc_addr_node_valid - validates a proposed network address for this node |
64 | * |
65 | * Accepts <Z.C.N>, where Z, C, and N are non-zero. |
66 | * |
67 | * Returns 1 if address can be used, otherwise 0 |
68 | */ |
69 | |
70 | int tipc_addr_node_valid(u32 addr) |
71 | { |
72 | return tipc_addr_domain_valid(addr) && tipc_node(addr); |
73 | } |
74 | |
75 | int tipc_in_scope(u32 domain, u32 addr) |
76 | { |
77 | if (!domain || (domain == addr)) |
78 | return 1; |
79 | if (domain == tipc_cluster_mask(addr)) /* domain <Z.C.0> */ |
80 | return 1; |
81 | if (domain == tipc_zone_mask(addr)) /* domain <Z.0.0> */ |
82 | return 1; |
83 | return 0; |
84 | } |
85 | |
86 | /** |
87 | * tipc_addr_scope - convert message lookup domain to a 2-bit scope value |
88 | */ |
89 | |
90 | int tipc_addr_scope(u32 domain) |
91 | { |
92 | if (likely(!domain)) |
93 | return TIPC_ZONE_SCOPE; |
94 | if (tipc_node(domain)) |
95 | return TIPC_NODE_SCOPE; |
96 | if (tipc_cluster(domain)) |
97 | return TIPC_CLUSTER_SCOPE; |
98 | return TIPC_ZONE_SCOPE; |
99 | } |
100 | |
101 | char *tipc_addr_string_fill(char *string, u32 addr) |
102 | { |
103 | snprintf(string, 16, "<%u.%u.%u>", |
104 | tipc_zone(addr), tipc_cluster(addr), tipc_node(addr)); |
105 | return string; |
106 | } |
107 |
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