1 | /* |
2 | * net/tipc/addr.h: Include file for TIPC address utility routines |
3 | * |
4 | * Copyright (c) 2000-2006, 2018, Ericsson AB |
5 | * Copyright (c) 2004-2005, Wind River Systems |
6 | * Copyright (c) 2020-2021, Red Hat Inc |
7 | * All rights reserved. |
8 | * |
9 | * Redistribution and use in source and binary forms, with or without |
10 | * modification, are permitted provided that the following conditions are met: |
11 | * |
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. |
20 | * |
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 |
35 | * POSSIBILITY OF SUCH DAMAGE. |
36 | */ |
37 | |
38 | #ifndef _TIPC_ADDR_H |
39 | #define _TIPC_ADDR_H |
40 | |
41 | #include <linux/types.h> |
42 | #include <linux/tipc.h> |
43 | #include <net/net_namespace.h> |
44 | #include <net/netns/generic.h> |
45 | #include "core.h" |
46 | |
47 | /* Struct tipc_uaddr: internal version of struct sockaddr_tipc. |
48 | * Must be kept aligned both regarding field positions and size. |
49 | */ |
50 | struct tipc_uaddr { |
51 | unsigned short family; |
52 | unsigned char addrtype; |
53 | signed char scope; |
54 | union { |
55 | struct { |
56 | struct tipc_service_addr sa; |
57 | u32 lookup_node; |
58 | }; |
59 | struct tipc_service_range sr; |
60 | struct tipc_socket_addr sk; |
61 | }; |
62 | }; |
63 | |
64 | static inline void tipc_uaddr(struct tipc_uaddr *ua, u32 atype, u32 scope, |
65 | u32 type, u32 lower, u32 upper) |
66 | { |
67 | ua->family = AF_TIPC; |
68 | ua->addrtype = atype; |
69 | ua->scope = scope; |
70 | ua->sr.type = type; |
71 | ua->sr.lower = lower; |
72 | ua->sr.upper = upper; |
73 | } |
74 | |
75 | static inline bool tipc_uaddr_valid(struct tipc_uaddr *ua, int len) |
76 | { |
77 | u32 atype; |
78 | |
79 | if (len < sizeof(struct sockaddr_tipc)) |
80 | return false; |
81 | atype = ua->addrtype; |
82 | if (ua->family != AF_TIPC) |
83 | return false; |
84 | if (atype == TIPC_SERVICE_ADDR || atype == TIPC_SOCKET_ADDR) |
85 | return true; |
86 | if (atype == TIPC_SERVICE_RANGE) |
87 | return ua->sr.upper >= ua->sr.lower; |
88 | return false; |
89 | } |
90 | |
91 | static inline u32 tipc_own_addr(struct net *net) |
92 | { |
93 | return tipc_net(net)->node_addr; |
94 | } |
95 | |
96 | static inline u8 *tipc_own_id(struct net *net) |
97 | { |
98 | struct tipc_net *tn = tipc_net(net); |
99 | |
100 | if (!strlen(tn->node_id_string)) |
101 | return NULL; |
102 | return tn->node_id; |
103 | } |
104 | |
105 | static inline char *tipc_own_id_string(struct net *net) |
106 | { |
107 | return tipc_net(net)->node_id_string; |
108 | } |
109 | |
110 | static inline u32 tipc_cluster_mask(u32 addr) |
111 | { |
112 | return addr & TIPC_ZONE_CLUSTER_MASK; |
113 | } |
114 | |
115 | static inline int tipc_node2scope(u32 node) |
116 | { |
117 | return node ? TIPC_NODE_SCOPE : TIPC_CLUSTER_SCOPE; |
118 | } |
119 | |
120 | static inline int tipc_scope2node(struct net *net, int sc) |
121 | { |
122 | return sc != TIPC_NODE_SCOPE ? 0 : tipc_own_addr(net); |
123 | } |
124 | |
125 | static inline int in_own_node(struct net *net, u32 addr) |
126 | { |
127 | return addr == tipc_own_addr(net) || !addr; |
128 | } |
129 | |
130 | bool tipc_in_scope(bool legacy_format, u32 domain, u32 addr); |
131 | void tipc_set_node_id(struct net *net, u8 *id); |
132 | void tipc_set_node_addr(struct net *net, u32 addr); |
133 | char *tipc_nodeid2string(char *str, u8 *id); |
134 | |
135 | #endif |
136 | |