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1 /*
2  * Copyright (C) 2008 The Android Open Source Project
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *  * Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  *  * Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in
12  *    the documentation and/or other materials provided with the
13  *    distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 #ifndef _NETINET_IN6_H
29 #define _NETINET_IN6_H
30 
31 #include <linux/in6.h>
32 
33 #define IN6_IS_ADDR_UNSPECIFIED(a)	\
34 	((*(const uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) &&	\
35 	 (*(const uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) &&	\
36 	 (*(const uint32_t *)(const void *)(&(a)->s6_addr[8]) == 0) &&	\
37 	 (*(const uint32_t *)(const void *)(&(a)->s6_addr[12]) == 0))
38 
39 #define IN6_IS_ADDR_LOOPBACK(a)		\
40 	((*(const uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) &&	\
41 	 (*(const uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) &&	\
42 	 (*(const uint32_t *)(const void *)(&(a)->s6_addr[8]) == 0) &&	\
43 	 (*(const uint32_t *)(const void *)(&(a)->s6_addr[12]) == ntohl(1)))
44 
45 #define IN6_IS_ADDR_V4COMPAT(a)		\
46 	((*(const uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) &&	\
47 	 (*(const uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) &&	\
48 	 (*(const uint32_t *)(const void *)(&(a)->s6_addr[8]) == 0) &&	\
49 	 (*(const uint32_t *)(const void *)(&(a)->s6_addr[12]) != 0) &&	\
50 	 (*(const uint32_t *)(const void *)(&(a)->s6_addr[12]) != ntohl(1)))
51 
52 #define IN6_IS_ADDR_V4MAPPED(a)		      \
53 	((*(const uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) &&	\
54 	 (*(const uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) &&	\
55 	 (*(const uint32_t *)(const void *)(&(a)->s6_addr[8]) == ntohl(0x0000ffff)))
56 
57 #define IN6_IS_ADDR_LINKLOCAL(a)	\
58 	(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
59 
60 #define IN6_IS_ADDR_SITELOCAL(a)	\
61 	(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
62 
63 /* RFC 4193. */
64 #define IN6_IS_ADDR_ULA(a)	\
65 	(((a)->s6_addr[0] & 0xfe) == 0xfc)
66 
67 #define IN6_IS_ADDR_MULTICAST(a)	\
68 	(((__const uint8_t *) (a))[0] == 0xff)
69 
70 
71 #define IPV6_ADDR_SCOPE_NODELOCAL       0x01
72 #define IPV6_ADDR_SCOPE_INTFACELOCAL    0x01
73 #define IPV6_ADDR_SCOPE_LINKLOCAL       0x02
74 #define IPV6_ADDR_SCOPE_SITELOCAL       0x05
75 #define IPV6_ADDR_SCOPE_ORGLOCAL        0x08
76 #define IPV6_ADDR_SCOPE_GLOBAL          0x0e
77 
78 #define IPV6_ADDR_MC_SCOPE(a)	\
79 	((a)->s6_addr[1] & 0x0f)
80 
81 #define IN6_IS_ADDR_MC_NODELOCAL(a)     \
82         (IN6_IS_ADDR_MULTICAST(a) &&  \
83          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
84 #define IN6_IS_ADDR_MC_LINKLOCAL(a)	\
85 	(IN6_IS_ADDR_MULTICAST(a) &&  \
86 	 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
87 #define IN6_IS_ADDR_MC_SITELOCAL(a)     \
88 	(IN6_IS_ADDR_MULTICAST(a) &&  \
89 	 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
90 #define IN6_IS_ADDR_MC_ORGLOCAL(a)     \
91 	(IN6_IS_ADDR_MULTICAST(a) &&  \
92 	 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
93 #define IN6_IS_ADDR_MC_GLOBAL(a)       \
94         (IN6_IS_ADDR_MULTICAST(a) &&  \
95          (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
96 
97 #define IN6_ARE_ADDR_EQUAL(a, b)			\
98     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
99 
100 #define INET6_ADDRSTRLEN 46
101 
102 #define IPV6_JOIN_GROUP IPV6_ADD_MEMBERSHIP
103 #define IPV6_LEAVE_GROUP IPV6_DROP_MEMBERSHIP
104 
105 #define IN6ADDR_ANY_INIT {{{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}}
106 
107 #define ipv6mr_interface ipv6mr_ifindex
108 
109 
110 #endif /* _NETINET_IN6_H */
111