release/src-rt-6.x.4708/include/proto/bcmarp.h

   1 /*
   2  * Copyright (C) 2012, Broadcom Corporation
   3  * All Rights Reserved.
   4  *
   5  * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Broadcom Corporation;
   6  * the contents of this file may not be disclosed to third parties, copied
   7  * or duplicated in any form, in whole or in part, without the prior
   8  * written permission of Broadcom Corporation.
   9  *
  10  * Fundamental constants relating to ARP Protocol
  11  *
  12  * $Id: bcmarp.h 332293 2012-05-09 20:49:03Z $
  13  */
  14
  15 #ifndef _bcmarp_h_
  16 #define _bcmarp_h_
  17
  18 #ifndef _TYPEDEFS_H_
  19 #include <typedefs.h>
  20 #endif
  21 #include <proto/bcmip.h>
  22
  23 /* This marks the start of a packed structure section. */
  24 #include <packed_section_start.h>
  25
  26
  27 #define ARP_OPC_OFFSET          6               /* option code offset */
  28 #define ARP_SRC_ETH_OFFSET      8               /* src h/w address offset */
  29 #define ARP_SRC_IP_OFFSET       14              /* src IP address offset */
  30 #define ARP_TGT_ETH_OFFSET      18              /* target h/w address offset */
  31 #define ARP_TGT_IP_OFFSET       24              /* target IP address offset */
  32
  33 #define ARP_OPC_REQUEST         1               /* ARP request */
  34 #define ARP_OPC_REPLY           2               /* ARP reply */
  35
  36 #define ARP_DATA_LEN            28              /* ARP data length */
  37
  38 BWL_PRE_PACKED_STRUCT struct bcmarp {
  39         uint16  htype;                          /* Header type (1 = ethernet) */
  40         uint16  ptype;                          /* Protocol type (0x800 = IP) */
  41         uint8   hlen;                           /* Hardware address length (Eth = 6) */
  42         uint8   plen;                           /* Protocol address length (IP = 4) */
  43         uint16  oper;                           /* ARP_OPC_... */
  44         uint8   src_eth[ETHER_ADDR_LEN];        /* Source hardware address */
  45         uint8   src_ip[IPV4_ADDR_LEN];          /* Source protocol address (not aligned) */
  46         uint8   dst_eth[ETHER_ADDR_LEN];        /* Destination hardware address */
  47         uint8   dst_ip[IPV4_ADDR_LEN];          /* Destination protocol address */
  48 } BWL_POST_PACKED_STRUCT;
  49
  50 /* Ethernet header + Arp message */
  51 BWL_PRE_PACKED_STRUCT struct bcmetharp {
  52         struct ether_header     eh;
  53         struct bcmarp   arp;
  54 } BWL_POST_PACKED_STRUCT;
  55
  56 /* IPv6 Neighbor Advertisement */
  57 #define NEIGHBOR_ADVERTISE_SRC_IPV6_OFFSET      8               /* src IPv6 address offset */
  58 #define NEIGHBOR_ADVERTISE_TYPE_OFFSET          40              /* type offset */
  59 #define NEIGHBOR_ADVERTISE_CHECKSUM_OFFSET      42              /* check sum offset */
  60 #define NEIGHBOR_ADVERTISE_FLAGS_OFFSET         44              /* R,S and O flags offset */
  61 #define NEIGHBOR_ADVERTISE_TGT_IPV6_OFFSET      48              /* target IPv6 address offset */
  62 #define NEIGHBOR_ADVERTISE_OPTION_OFFSET        64              /* options offset */
  63 #define NEIGHBOR_ADVERTISE_TYPE         136
  64 #define NEIGHBOR_SOLICITATION_TYPE      135
  65
  66 #define OPT_TYPE_SRC_LINK_ADDR          1
  67 #define OPT_TYPE_TGT_LINK_ADDR          2
  68
  69 #define NEIGHBOR_ADVERTISE_DATA_LEN     72      /* neighbor advertisement data length */
  70 #define NEIGHBOR_ADVERTISE_FLAGS_VALUE  0x60    /* R=0, S=1 and O=1 */
  71
  72 /* This marks the end of a packed structure section. */
  73 #include <packed_section_end.h>
  74
  75 #endif  /* !defined(_bcmarp_h_) */