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 #ifndef _LINUXKPI_NET_IPV6_H_
30 #define _LINUXKPI_NET_IPV6_H_
31
32 #include <sys/types.h>
33 #include <netinet/in.h>
34 #include <linux/types.h>
35 #include <linux/bitops.h>
36
37 #define IPV6_DEFAULT_HOPLIMIT 64
38
39 #define NEXTHDR_HOP IPPROTO_HOPOPTS
40 #define NEXTHDR_ROUTING IPPROTO_ROUTING
41 #define NEXTHDR_NONE IPPROTO_NONE
42 #define NEXTHDR_DEST IPPROTO_DSTOPTS
43
44 #define ipv6_addr_loopback(addr) IN6_IS_ADDR_LOOPBACK(addr)
45 #define ipv6_addr_any(addr) IN6_IS_ADDR_UNSPECIFIED(addr)
46
47 #define ipv6_addr_copy(dst, src) \
48 memcpy((dst), (src), sizeof(struct in6_addr))
49
50 static inline void
ipv6_ib_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)51 ipv6_ib_mc_map(const struct in6_addr *addr, const unsigned char *broadcast,
52 char *buf)
53 {
54 unsigned char scope;
55
56 scope = broadcast[5] & 0xF;
57 buf[0] = 0;
58 buf[1] = 0xff;
59 buf[2] = 0xff;
60 buf[3] = 0xff;
61 buf[4] = 0xff;
62 buf[5] = 0x10 | scope;
63 buf[6] = 0x60;
64 buf[7] = 0x1b;
65 buf[8] = broadcast[8];
66 buf[9] = broadcast[9];
67 memcpy(&buf[10], &addr->s6_addr[6], 10);
68 }
69
__ipv6_addr_set_half(__be32 * addr,__be32 wh,__be32 wl)70 static inline void __ipv6_addr_set_half(__be32 *addr, __be32 wh, __be32 wl)
71 {
72 #if BITS_PER_LONG == 64
73 #if defined(__BIG_ENDIAN)
74 if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) {
75 *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl));
76 return;
77 }
78 #elif defined(__LITTLE_ENDIAN)
79 if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) {
80 *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh));
81 return;
82 }
83 #endif
84 #endif
85 addr[0] = wh;
86 addr[1] = wl;
87 }
88
ipv6_addr_set(struct in6_addr * addr,__be32 w1,__be32 w2,__be32 w3,__be32 w4)89 static inline void ipv6_addr_set(struct in6_addr *addr,
90 __be32 w1, __be32 w2,
91 __be32 w3, __be32 w4)
92 {
93 __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2);
94 __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4);
95 }
96
ipv6_addr_set_v4mapped(const __be32 addr,struct in6_addr * v4mapped)97 static inline void ipv6_addr_set_v4mapped(const __be32 addr,
98 struct in6_addr *v4mapped)
99 {
100 ipv6_addr_set(v4mapped,
101 0, 0,
102 htonl(0x0000FFFF),
103 addr);
104 }
105
ipv6_addr_v4mapped(const struct in6_addr * a)106 static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
107 {
108 return ((a->s6_addr32[0] | a->s6_addr32[1] |
109 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
110 }
111
ipv6_addr_cmp(const struct in6_addr * a1,const struct in6_addr * a2)112 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
113 {
114 return memcmp(a1, a2, sizeof(struct in6_addr));
115 }
116
117 #endif /* _LINUXKPI_NET_IPV6_H_ */
118