include/linux/if_ether.h

   1 /*
   2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   3  *              operating system.  INET is implemented using the  BSD Socket
   4  *              interface as the means of communication with the user level.
   5  *
   6  *              Global definitions for the Ethernet IEEE 802.3 interface.
   7  *
   8  * Version:     @(#)if_ether.h  1.0.1a  02/08/94
   9  *
  10  * Author:      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  11  *              Donald Becker, <becker@super.org>
  12  *              Alan Cox, <alan@redhat.com>
  13  *              Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
  14  *
  15  *              This program is free software; you can redistribute it and/or
  16  *              modify it under the terms of the GNU General Public License
  17  *              as published by the Free Software Foundation; either version
  18  *              2 of the License, or (at your option) any later version.
  19  */
  20
  21 #ifndef _LINUX_IF_ETHER_H
  22 #define _LINUX_IF_ETHER_H
  23
  24 #include <linux/types.h>
  25
  26 /*
  27  *      IEEE 802.3 Ethernet magic constants.  The frame sizes omit the preamble
  28  *      and FCS/CRC (frame check sequence).
  29  */
  30
  31 #define ETH_ALEN        6               /* Octets in one ethernet addr   */
  32 #define ETH_HLEN        14              /* Total octets in header.       */
  33 #define ETH_ZLEN        60              /* Min. octets in frame sans FCS */
  34 #define ETH_DATA_LEN    1500            /* Max. octets in payload        */
  35 #define ETH_FRAME_LEN   1514            /* Max. octets in frame sans FCS */
  36 #define ETH_FCS_LEN     4               /* Octets in the FCS             */
  37
  38 /*
  39  *      These are the defined Ethernet Protocol ID's.
  40  */
  41
  42 #define ETH_P_LOOP      0x0060          /* Ethernet Loopback packet     */
  43 #define ETH_P_PUP       0x0200          /* Xerox PUP packet             */
  44 #define ETH_P_PUPAT     0x0201          /* Xerox PUP Addr Trans packet  */
  45 #define ETH_P_IP        0x0800          /* Internet Protocol packet     */
  46 #define ETH_P_X25       0x0805          /* CCITT X.25                   */
  47 #define ETH_P_ARP       0x0806          /* Address Resolution packet    */
  48 #define ETH_P_BPQ       0x08FF          /* G8BPQ AX.25 Ethernet Packet  [ NOT AN OFFICIALLY REGISTERED ID ] */
  49 #define ETH_P_IEEEPUP   0x0a00          /* Xerox IEEE802.3 PUP packet */
  50 #define ETH_P_IEEEPUPAT 0x0a01          /* Xerox IEEE802.3 PUP Addr Trans packet */
  51 #define ETH_P_DEC       0x6000          /* DEC Assigned proto           */
  52 #define ETH_P_DNA_DL    0x6001          /* DEC DNA Dump/Load            */
  53 #define ETH_P_DNA_RC    0x6002          /* DEC DNA Remote Console       */
  54 #define ETH_P_DNA_RT    0x6003          /* DEC DNA Routing              */
  55 #define ETH_P_LAT       0x6004          /* DEC LAT                      */
  56 #define ETH_P_DIAG      0x6005          /* DEC Diagnostics              */
  57 #define ETH_P_CUST      0x6006          /* DEC Customer use             */
  58 #define ETH_P_SCA       0x6007          /* DEC Systems Comms Arch       */
  59 #define ETH_P_RARP      0x8035          /* Reverse Addr Res packet      */
  60 #define ETH_P_ATALK     0x809B          /* Appletalk DDP                */
  61 #define ETH_P_AARP      0x80F3          /* Appletalk AARP               */
  62 #define ETH_P_8021Q     0x8100          /* 802.1Q VLAN Extended Header  */
  63 #define ETH_P_IPX       0x8137          /* IPX over DIX                 */
  64 #define ETH_P_IPV6      0x86DD          /* IPv6 over bluebook           */
  65 #define ETH_P_PAUSE     0x8808          /* IEEE Pause frames. See 802.3 31B */
  66 #define ETH_P_SLOW      0x8809          /* Slow Protocol. See 802.3ad 43B */
  67 #define ETH_P_WCCP      0x883E          /* Web-cache coordination protocol
  68                                          * defined in draft-wilson-wrec-wccp-v2-00.txt */
  69 #define ETH_P_PPP_DISC  0x8863          /* PPPoE discovery messages     */
  70 #define ETH_P_PPP_SES   0x8864          /* PPPoE session messages       */
  71 #define ETH_P_MPLS_UC   0x8847          /* MPLS Unicast traffic         */
  72 #define ETH_P_MPLS_MC   0x8848          /* MPLS Multicast traffic       */
  73 #define ETH_P_ATMMPOA   0x884c          /* MultiProtocol Over ATM       */
  74 #define ETH_P_ATMFATE   0x8884          /* Frame-based ATM Transport
  75                                          * over Ethernet
  76                                          */
  77 #define ETH_P_AOE       0x88A2          /* ATA over Ethernet            */
  78 #define ETH_P_TIPC      0x88CA          /* TIPC                         */
  79
  80 /*
  81  *      Non DIX types. Won't clash for 1500 types.
  82  */
  83
  84 #define ETH_P_802_3     0x0001          /* Dummy type for 802.3 frames  */
  85 #define ETH_P_AX25      0x0002          /* Dummy protocol id for AX.25  */
  86 #define ETH_P_ALL       0x0003          /* Every packet (be careful!!!) */
  87 #define ETH_P_802_2     0x0004          /* 802.2 frames                 */
  88 #define ETH_P_SNAP      0x0005          /* Internal only                */
  89 #define ETH_P_DDCMP     0x0006          /* DEC DDCMP: Internal only     */
  90 #define ETH_P_WAN_PPP   0x0007          /* Dummy type for WAN PPP frames*/
  91 #define ETH_P_PPP_MP    0x0008          /* Dummy type for PPP MP frames */
  92 #define ETH_P_LOCALTALK 0x0009          /* Localtalk pseudo type        */
  93 #define ETH_P_CAN       0x000C          /* Controller Area Network      */
  94 #define ETH_P_PPPTALK   0x0010          /* Dummy type for Atalk over PPP*/
  95 #define ETH_P_TR_802_2  0x0011          /* 802.2 frames                 */
  96 #define ETH_P_MOBITEX   0x0015          /* Mobitex (kaz@cafe.net)       */
  97 #define ETH_P_CONTROL   0x0016          /* Card specific control frames */
  98 #define ETH_P_IRDA      0x0017          /* Linux-IrDA                   */
  99 #define ETH_P_ECONET    0x0018          /* Acorn Econet                 */
 100 #define ETH_P_HDLC      0x0019          /* HDLC frames                  */
 101 #define ETH_P_ARCNET    0x001A          /* 1A for ArcNet :-)            */
 102
 103 /*
 104  *      This is an Ethernet frame header.
 105  */
 106
 107 struct ethhdr {
 108         unsigned char   h_dest[ETH_ALEN];       /* destination eth addr */
 109         unsigned char   h_source[ETH_ALEN];     /* source ether addr    */
 110         __be16          h_proto;                /* packet type ID field */
 111 } __attribute__((packed));
 112
 113 #ifdef __KERNEL__
 114 #include <linux/skbuff.h>
 115
 116 static inline struct ethhdr *eth_hdr(const struct sk_buff *skb)
 117 {
 118         return (struct ethhdr *)skb_mac_header(skb);
 119 }
 120
 121 int eth_header_parse(const struct sk_buff *skb, unsigned char *haddr);
 122
 123 #ifdef CONFIG_SYSCTL
 124 extern struct ctl_table ether_table[];
 125 #endif
 126
 127 extern ssize_t sysfs_format_mac(char *buf, const unsigned char *addr, int len);
 128
 129 /*
 130  *      Display a 6 byte device address (MAC) in a readable format.
 131  */
 132 extern char *print_mac(char *buf, const unsigned char *addr);
 133 #define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
 134 #define MAC_BUF_SIZE    18
 135 #define DECLARE_MAC_BUF(var) char var[MAC_BUF_SIZE] __maybe_unused
 136
 137 #endif
 138
 139 #endif  /* _LINUX_IF_ETHER_H */