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
30 #ifndef _LINUX_NET_IPV6_H_
31 #define _LINUX_NET_IPV6_H_
32
33 #include "opt_inet6.h"
34
35 #define ipv6_addr_loopback IN6_IS_ADDR_LOOPBACK
36 #define ipv6_addr_copy(dst, src) \
37 memcpy((dst), (src), sizeof(struct in6_addr))
38
39 #ifdef INET6
40 static inline void
ipv6_ib_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)41 ipv6_ib_mc_map(const struct in6_addr *addr, const unsigned char *broadcast,
42 char *buf)
43 {
44 unsigned char scope;
45
46 scope = broadcast[5] & 0xF;
47 buf[0] = 0;
48 buf[1] = 0xff;
49 buf[2] = 0xff;
50 buf[3] = 0xff;
51 buf[4] = 0xff;
52 buf[5] = 0x10 | scope;
53 buf[6] = 0x60;
54 buf[7] = 0x1b;
55 buf[8] = broadcast[8];
56 buf[9] = broadcast[9];
57 memcpy(&buf[10], &addr->s6_addr[6], 10);
58 }
59 #endif
60
__ipv6_addr_set_half(__be32 * addr,__be32 wh,__be32 wl)61 static inline void __ipv6_addr_set_half(__be32 *addr,
62 __be32 wh, __be32 wl)
63 {
64 #if BITS_PER_LONG == 64
65 #if defined(__BIG_ENDIAN)
66 if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) {
67 *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl));
68 return;
69 }
70 #elif defined(__LITTLE_ENDIAN)
71 if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) {
72 *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh));
73 return;
74 }
75 #endif
76 #endif
77 addr[0] = wh;
78 addr[1] = wl;
79 }
80
ipv6_addr_set(struct in6_addr * addr,__be32 w1,__be32 w2,__be32 w3,__be32 w4)81 static inline void ipv6_addr_set(struct in6_addr *addr,
82 __be32 w1, __be32 w2,
83 __be32 w3, __be32 w4)
84 {
85 __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2);
86 __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4);
87 }
88
ipv6_addr_set_v4mapped(const __be32 addr,struct in6_addr * v4mapped)89 static inline void ipv6_addr_set_v4mapped(const __be32 addr,
90 struct in6_addr *v4mapped)
91 {
92 ipv6_addr_set(v4mapped,
93 0, 0,
94 htonl(0x0000FFFF),
95 addr);
96 }
97
ipv6_addr_v4mapped(const struct in6_addr * a)98 static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
99 {
100 return ((a->s6_addr32[0] | a->s6_addr32[1] |
101 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
102 }
103
ipv6_addr_cmp(const struct in6_addr * a1,const struct in6_addr * a2)104 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
105 {
106 return memcmp(a1, a2, sizeof(struct in6_addr));
107 }
108
109
110 #endif /* _LINUX_NET_IPV6_H_ */
111