1 /*
2 * net/tipc/addr.h: Include file for TIPC address utility routines
3 *
4 * Copyright (c) 2000-2006, Ericsson AB
5 * Copyright (c) 2004-2005, 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 #ifndef _TIPC_ADDR_H
38 #define _TIPC_ADDR_H
39
40 static inline u32 own_node(void)
41 {
42 return tipc_node(tipc_own_addr);
43 }
44
45 static inline u32 own_cluster(void)
46 {
47 return tipc_cluster(tipc_own_addr);
48 }
49
50 static inline u32 own_zone(void)
51 {
52 return tipc_zone(tipc_own_addr);
53 }
54
55 static inline int in_own_cluster(u32 addr)
56 {
57 return !((addr ^ tipc_own_addr) >> 12);
58 }
59
60 static inline int is_slave(u32 addr)
61 {
62 return addr & 0x800;
63 }
64
65 static inline int may_route(u32 addr)
66 {
67 return(addr ^ tipc_own_addr) >> 11;
68 }
69
70 static inline int in_scope(u32 domain, u32 addr)
71 {
72 if (!domain || (domain == addr))
73 return 1;
74 if (domain == (addr & 0xfffff000u)) /* domain <Z.C.0> */
75 return 1;
76 if (domain == (addr & 0xff000000u)) /* domain <Z.0.0> */
77 return 1;
78 return 0;
79 }
80
81 /**
82 * addr_scope - convert message lookup domain to equivalent 2-bit scope value
83 */
84
85 static inline int addr_scope(u32 domain)
86 {
87 if (likely(!domain))
88 return TIPC_ZONE_SCOPE;
89 if (tipc_node(domain))
90 return TIPC_NODE_SCOPE;
91 if (tipc_cluster(domain))
92 return TIPC_CLUSTER_SCOPE;
93 return TIPC_ZONE_SCOPE;
94 }
95
96 /**
97 * addr_domain - convert 2-bit scope value to equivalent message lookup domain
98 *
99 * Needed when address of a named message must be looked up a second time
100 * after a network hop.
101 */
102
103 static inline int addr_domain(int sc)
104 {
105 if (likely(sc == TIPC_NODE_SCOPE))
106 return tipc_own_addr;
107 if (sc == TIPC_CLUSTER_SCOPE)
108 return tipc_addr(tipc_zone(tipc_own_addr),
109 tipc_cluster(tipc_own_addr), 0);
110 return tipc_addr(tipc_zone(tipc_own_addr), 0, 0);
111 }
112
113 static inline char *addr_string_fill(char *string, u32 addr)
114 {
115 snprintf(string, 16, "<%u.%u.%u>",
116 tipc_zone(addr), tipc_cluster(addr), tipc_node(addr));
117 return string;
118 }
119
120 int tipc_addr_domain_valid(u32);
121 int tipc_addr_node_valid(u32 addr);
122
123 #endif
124
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