Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/addr.c: TIPC address utility routines | |
c4307285 | 3 | * |
593a5f22 | 4 | * Copyright (c) 2000-2006, Ericsson AB |
f831c963 | 5 | * Copyright (c) 2004-2005, 2010-2011, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
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. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
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 | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
1da46568 | 37 | #include <linux/kernel.h> |
8f92df6a | 38 | #include "addr.h" |
34747539 YX |
39 | #include "core.h" |
40 | ||
41 | /** | |
42 | * in_own_cluster - test for cluster inclusion; <0.0.0> always matches | |
43 | */ | |
44 | int in_own_cluster(struct net *net, u32 addr) | |
45 | { | |
46 | return in_own_cluster_exact(net, addr) || !addr; | |
47 | } | |
48 | ||
49 | int in_own_cluster_exact(struct net *net, u32 addr) | |
50 | { | |
51 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
52 | ||
53 | return !((addr ^ tn->own_addr) >> 12); | |
54 | } | |
55 | ||
56 | /** | |
57 | * in_own_node - test for node inclusion; <0.0.0> always matches | |
58 | */ | |
59 | int in_own_node(struct net *net, u32 addr) | |
60 | { | |
61 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
62 | ||
63 | return (addr == tn->own_addr) || !addr; | |
64 | } | |
65 | ||
66 | /** | |
67 | * addr_domain - convert 2-bit scope value to equivalent message lookup domain | |
68 | * | |
69 | * Needed when address of a named message must be looked up a second time | |
70 | * after a network hop. | |
71 | */ | |
72 | u32 addr_domain(struct net *net, u32 sc) | |
73 | { | |
74 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
75 | ||
76 | if (likely(sc == TIPC_NODE_SCOPE)) | |
77 | return tn->own_addr; | |
78 | if (sc == TIPC_CLUSTER_SCOPE) | |
79 | return tipc_cluster_mask(tn->own_addr); | |
80 | return tipc_zone_mask(tn->own_addr); | |
81 | } | |
b97bf3fd | 82 | |
b97bf3fd | 83 | /** |
4323add6 | 84 | * tipc_addr_domain_valid - validates a network domain address |
c4307285 YH |
85 | * |
86 | * Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>, | |
f831c963 | 87 | * where Z, C, and N are non-zero. |
c4307285 | 88 | * |
b97bf3fd PL |
89 | * Returns 1 if domain address is valid, otherwise 0 |
90 | */ | |
4323add6 | 91 | int tipc_addr_domain_valid(u32 addr) |
b97bf3fd PL |
92 | { |
93 | u32 n = tipc_node(addr); | |
94 | u32 c = tipc_cluster(addr); | |
95 | u32 z = tipc_zone(addr); | |
b97bf3fd PL |
96 | |
97 | if (n && (!z || !c)) | |
98 | return 0; | |
99 | if (c && !z) | |
100 | return 0; | |
101 | return 1; | |
102 | } | |
103 | ||
104 | /** | |
4323add6 | 105 | * tipc_addr_node_valid - validates a proposed network address for this node |
c4307285 | 106 | * |
f831c963 | 107 | * Accepts <Z.C.N>, where Z, C, and N are non-zero. |
c4307285 | 108 | * |
b97bf3fd PL |
109 | * Returns 1 if address can be used, otherwise 0 |
110 | */ | |
4323add6 | 111 | int tipc_addr_node_valid(u32 addr) |
b97bf3fd | 112 | { |
a02cec21 | 113 | return tipc_addr_domain_valid(addr) && tipc_node(addr); |
b97bf3fd PL |
114 | } |
115 | ||
80e0c330 AS |
116 | int tipc_in_scope(u32 domain, u32 addr) |
117 | { | |
118 | if (!domain || (domain == addr)) | |
119 | return 1; | |
a3796f89 | 120 | if (domain == tipc_cluster_mask(addr)) /* domain <Z.C.0> */ |
80e0c330 | 121 | return 1; |
a3796f89 | 122 | if (domain == tipc_zone_mask(addr)) /* domain <Z.0.0> */ |
80e0c330 AS |
123 | return 1; |
124 | return 0; | |
125 | } | |
126 | ||
127 | /** | |
128 | * tipc_addr_scope - convert message lookup domain to a 2-bit scope value | |
129 | */ | |
80e0c330 AS |
130 | int tipc_addr_scope(u32 domain) |
131 | { | |
132 | if (likely(!domain)) | |
133 | return TIPC_ZONE_SCOPE; | |
134 | if (tipc_node(domain)) | |
135 | return TIPC_NODE_SCOPE; | |
136 | if (tipc_cluster(domain)) | |
137 | return TIPC_CLUSTER_SCOPE; | |
138 | return TIPC_ZONE_SCOPE; | |
139 | } | |
140 | ||
141 | char *tipc_addr_string_fill(char *string, u32 addr) | |
142 | { | |
143 | snprintf(string, 16, "<%u.%u.%u>", | |
144 | tipc_zone(addr), tipc_cluster(addr), tipc_node(addr)); | |
145 | return string; | |
146 | } |