1 /*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
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
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
13 * 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 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD$
30 */
31 #ifndef _LINUX_NET_IPV6_H_
32 #define _LINUX_NET_IPV6_H_
33
34 #include <sys/types.h>
35 #include <netinet/in.h>
36 #include <linux/types.h>
37
38 #define IPV6_DEFAULT_HOPLIMIT 64
39
40 #define ipv6_addr_loopback(addr) IN6_IS_ADDR_LOOPBACK(addr)
41 #define ipv6_addr_any(addr) IN6_IS_ADDR_UNSPECIFIED(addr)
42
43 #define ipv6_addr_copy(dst, src) \
44 memcpy((dst), (src), sizeof(struct in6_addr))
45
46 static inline void
ipv6_ib_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)47 ipv6_ib_mc_map(const struct in6_addr *addr, const unsigned char *broadcast,
48 char *buf)
49 {
50 unsigned char scope;
51
52 scope = broadcast[5] & 0xF;
53 buf[0] = 0;
54 buf[1] = 0xff;
55 buf[2] = 0xff;
56 buf[3] = 0xff;
57 buf[4] = 0xff;
58 buf[5] = 0x10 | scope;
59 buf[6] = 0x60;
60 buf[7] = 0x1b;
61 buf[8] = broadcast[8];
62 buf[9] = broadcast[9];
63 memcpy(&buf[10], &addr->s6_addr[6], 10);
64 }
65
__ipv6_addr_set_half(__be32 * addr,__be32 wh,__be32 wl)66 static inline void __ipv6_addr_set_half(__be32 *addr, __be32 wh, __be32 wl)
67 {
68 #if BITS_PER_LONG == 64
69 #if defined(__BIG_ENDIAN)
70 if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) {
71 *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl));
72 return;
73 }
74 #elif defined(__LITTLE_ENDIAN)
75 if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) {
76 *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh));
77 return;
78 }
79 #endif
80 #endif
81 addr[0] = wh;
82 addr[1] = wl;
83 }
84
ipv6_addr_set(struct in6_addr * addr,__be32 w1,__be32 w2,__be32 w3,__be32 w4)85 static inline void ipv6_addr_set(struct in6_addr *addr,
86 __be32 w1, __be32 w2,
87 __be32 w3, __be32 w4)
88 {
89 __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2);
90 __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4);
91 }
92
ipv6_addr_set_v4mapped(const __be32 addr,struct in6_addr * v4mapped)93 static inline void ipv6_addr_set_v4mapped(const __be32 addr,
94 struct in6_addr *v4mapped)
95 {
96 ipv6_addr_set(v4mapped,
97 0, 0,
98 htonl(0x0000FFFF),
99 addr);
100 }
101
ipv6_addr_v4mapped(const struct in6_addr * a)102 static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
103 {
104 return ((a->s6_addr32[0] | a->s6_addr32[1] |
105 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
106 }
107
ipv6_addr_cmp(const struct in6_addr * a1,const struct in6_addr * a2)108 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
109 {
110 return memcmp(a1, a2, sizeof(struct in6_addr));
111 }
112
113
114 #endif /* _LINUX_NET_IPV6_H_ */
115