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 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 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 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 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 } 105 106 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 } 111 112 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