ipv6.h

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

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FreeBSD/Linux Kernel Cross Reference sys/compat/linuxkpi/common/include/net/ipv6.h

FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/include/net/ipv6.h