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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
49int 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
70int tipc_addr_node_valid(u32 addr)
71{
72 return tipc_addr_domain_valid(addr) && tipc_node(addr);
73}
74
75int 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
90int 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
101char *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}
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 <linux/kernel.h>
38#include "addr.h"
39#include "core.h"
40
41/**
42 * in_own_cluster - test for cluster inclusion; <0.0.0> always matches
43 */
44int in_own_cluster(struct net *net, u32 addr)
45{
46 return in_own_cluster_exact(net, addr) || !addr;
47}
48
49int 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 */
59int 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 */
72u32 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}
82
83/**
84 * tipc_addr_domain_valid - validates a network domain address
85 *
86 * Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>,
87 * where Z, C, and N are non-zero.
88 *
89 * Returns 1 if domain address is valid, otherwise 0
90 */
91int tipc_addr_domain_valid(u32 addr)
92{
93 u32 n = tipc_node(addr);
94 u32 c = tipc_cluster(addr);
95 u32 z = tipc_zone(addr);
96
97 if (n && (!z || !c))
98 return 0;
99 if (c && !z)
100 return 0;
101 return 1;
102}
103
104/**
105 * tipc_addr_node_valid - validates a proposed network address for this node
106 *
107 * Accepts <Z.C.N>, where Z, C, and N are non-zero.
108 *
109 * Returns 1 if address can be used, otherwise 0
110 */
111int tipc_addr_node_valid(u32 addr)
112{
113 return tipc_addr_domain_valid(addr) && tipc_node(addr);
114}
115
116int tipc_in_scope(u32 domain, u32 addr)
117{
118 if (!domain || (domain == addr))
119 return 1;
120 if (domain == tipc_cluster_mask(addr)) /* domain <Z.C.0> */
121 return 1;
122 if (domain == tipc_zone_mask(addr)) /* domain <Z.0.0> */
123 return 1;
124 return 0;
125}
126
127/**
128 * tipc_addr_scope - convert message lookup domain to a 2-bit scope value
129 */
130int 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
141char *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}