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FreeBSD/Linux Kernel Cross Reference
sys/netinet/if_ether.h

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    1 /*-
    2  * Copyright (c) 1982, 1986, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      @(#)if_ether.h  8.3 (Berkeley) 5/2/95
   30  * $FreeBSD$
   31  */
   32 
   33 #ifndef _NETINET_IF_ETHER_H_
   34 #define _NETINET_IF_ETHER_H_
   35 
   36 #include <net/ethernet.h>
   37 #include <net/if_arp.h>
   38 
   39 /*
   40  * Macro to map an IP multicast address to an Ethernet multicast address.
   41  * The high-order 25 bits of the Ethernet address are statically assigned,
   42  * and the low-order 23 bits are taken from the low end of the IP address.
   43  */
   44 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
   45         /* struct in_addr *ipaddr; */ \
   46         /* u_char enaddr[ETHER_ADDR_LEN];          */ \
   47 { \
   48         (enaddr)[0] = 0x01; \
   49         (enaddr)[1] = 0x00; \
   50         (enaddr)[2] = 0x5e; \
   51         (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \
   52         (enaddr)[4] = ((u_char *)ipaddr)[2]; \
   53         (enaddr)[5] = ((u_char *)ipaddr)[3]; \
   54 }
   55 /*
   56  * Macro to map an IP6 multicast address to an Ethernet multicast address.
   57  * The high-order 16 bits of the Ethernet address are statically assigned,
   58  * and the low-order 32 bits are taken from the low end of the IP6 address.
   59  */
   60 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr)                       \
   61 /* struct       in6_addr *ip6addr; */                                   \
   62 /* u_char       enaddr[ETHER_ADDR_LEN]; */                              \
   63 {                                                                       \
   64         (enaddr)[0] = 0x33;                                             \
   65         (enaddr)[1] = 0x33;                                             \
   66         (enaddr)[2] = ((u_char *)ip6addr)[12];                          \
   67         (enaddr)[3] = ((u_char *)ip6addr)[13];                          \
   68         (enaddr)[4] = ((u_char *)ip6addr)[14];                          \
   69         (enaddr)[5] = ((u_char *)ip6addr)[15];                          \
   70 }
   71 
   72 /*
   73  * Ethernet Address Resolution Protocol.
   74  *
   75  * See RFC 826 for protocol description.  Structure below is adapted
   76  * to resolving internet addresses.  Field names used correspond to
   77  * RFC 826.
   78  */
   79 struct  ether_arp {
   80         struct  arphdr ea_hdr;  /* fixed-size header */
   81         u_char  arp_sha[ETHER_ADDR_LEN];        /* sender hardware address */
   82         u_char  arp_spa[4];     /* sender protocol address */
   83         u_char  arp_tha[ETHER_ADDR_LEN];        /* target hardware address */
   84         u_char  arp_tpa[4];     /* target protocol address */
   85 };
   86 #define arp_hrd ea_hdr.ar_hrd
   87 #define arp_pro ea_hdr.ar_pro
   88 #define arp_hln ea_hdr.ar_hln
   89 #define arp_pln ea_hdr.ar_pln
   90 #define arp_op  ea_hdr.ar_op
   91 
   92 struct sockaddr_inarp {
   93         u_char  sin_len;
   94         u_char  sin_family;
   95         u_short sin_port;
   96         struct  in_addr sin_addr;
   97         struct  in_addr sin_srcaddr;
   98         u_short sin_tos;
   99         u_short sin_other;
  100 #define SIN_PROXY 1
  101 };
  102 /*
  103  * IP and ethernet specific routing flags
  104  */
  105 #define RTF_USETRAILERS RTF_PROTO1      /* use trailers */
  106 #define RTF_ANNOUNCE    RTF_PROTO2      /* announce new arp entry */
  107 
  108 #ifdef  _KERNEL
  109 extern u_char   ether_ipmulticast_min[ETHER_ADDR_LEN];
  110 extern u_char   ether_ipmulticast_max[ETHER_ADDR_LEN];
  111 
  112 int     arpresolve(struct ifnet *ifp, struct rtentry *rt,
  113                 struct mbuf *m, struct sockaddr *dst, u_char *desten);
  114 int     arpresolve2(struct ifnet *ifp, struct rtentry *rt,
  115                 struct sockaddr *dst, u_char *desten);
  116 void    arp_ifinit(struct ifnet *, struct ifaddr *);
  117 void    arp_ifinit2(struct ifnet *, struct ifaddr *, u_char *);
  118 #endif
  119 
  120 #endif

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