LXR linux-old/include/linux/ipv6.h

   1#ifndef _IPV6_H
   2#define _IPV6_H
   3
   4#include <linux/in6.h>
   5#include <asm/byteorder.h>
   6
   7/* The latest drafts declared increase in minimal mtu up to 1280. */
   8
   9#define IPV6_MIN_MTU    1280
  10
  11/*
  12 *      Advanced API
  13 *      source interface/address selection, source routing, etc...
  14 *      *under construction*
  15 */
  16
  17
  18struct in6_pktinfo {
  19        struct in6_addr ipi6_addr;
  20        int             ipi6_ifindex;
  21};
  22
  23
  24struct in6_ifreq {
  25        struct in6_addr ifr6_addr;
  26        __u32           ifr6_prefixlen;
  27        int             ifr6_ifindex; 
  28};
  29
  30#define IPV6_SRCRT_STRICT       0x01    /* this hop must be a neighbor  */
  31#define IPV6_SRCRT_TYPE_0       0       /* IPv6 type 0 Routing Header   */
  32
  33/*
  34 *      routing header
  35 */
  36struct ipv6_rt_hdr {
  37        __u8            nexthdr;
  38        __u8            hdrlen;
  39        __u8            type;
  40        __u8            segments_left;
  41
  42        /*
  43         *      type specific data
  44         *      variable length field
  45         */
  46};
  47
  48
  49struct ipv6_opt_hdr {
  50        __u8            nexthdr;
  51        __u8            hdrlen;
  52        /* 
  53         * TLV encoded option data follows.
  54         */
  55};
  56
  57#define ipv6_destopt_hdr ipv6_opt_hdr
  58#define ipv6_hopopt_hdr  ipv6_opt_hdr
  59
  60#ifdef __KERNEL__
  61#define ipv6_optlen(p)  (((p)->hdrlen+1) << 3)
  62#endif
  63
  64/*
  65 *      routing header type 0 (used in cmsghdr struct)
  66 */
  67
  68struct rt0_hdr {
  69        struct ipv6_rt_hdr      rt_hdr;
  70        __u32                   bitmap;         /* strict/loose bit map */
  71        struct in6_addr         addr[0];
  72
  73#define rt0_type                rt_hdr.type
  74};
  75
  76/*
  77 *      IPv6 fixed header
  78 *
  79 *      BEWARE, it is incorrect. The first 4 bits of flow_lbl
  80 *      are glued to priority now, forming "class".
  81 */
  82
  83struct ipv6hdr {
  84#if defined(__LITTLE_ENDIAN_BITFIELD)
  85        __u8                    priority:4,
  86                                version:4;
  87#elif defined(__BIG_ENDIAN_BITFIELD)
  88        __u8                    version:4,
  89                                priority:4;
  90#else
  91#error  "Please fix <asm/byteorder.h>"
  92#endif
  93        __u8                    flow_lbl[3];
  94
  95        __u16                   payload_len;
  96        __u8                    nexthdr;
  97        __u8                    hop_limit;
  98
  99        struct  in6_addr        saddr;
 100        struct  in6_addr        daddr;
 101};
 102
 103/*
 104 * This structure contains configuration options per IPv6 link.
 105 */
 106struct ipv6_devconf {
 107        __s32           forwarding;
 108        __s32           hop_limit;
 109        __s32           mtu6;
 110        __s32           accept_ra;
 111        __s32           accept_redirects;
 112        __s32           autoconf;
 113        __s32           dad_transmits;
 114        __s32           rtr_solicits;
 115        __s32           rtr_solicit_interval;
 116        __s32           rtr_solicit_delay;
 117#ifdef CONFIG_IPV6_PRIVACY
 118        __s32           use_tempaddr;
 119        __s32           temp_valid_lft;
 120        __s32           temp_prefered_lft;
 121        __s32           regen_max_retry;
 122        __s32           max_desync_factor;
 123#endif
 124        void            *sysctl;
 125};
 126
 127/* index values for the variables in ipv6_devconf */
 128enum {
 129        DEVCONF_FORWARDING = 0,
 130        DEVCONF_HOPLIMIT,
 131        DEVCONF_MTU6,
 132        DEVCONF_ACCEPT_RA,
 133        DEVCONF_ACCEPT_REDIRECTS,
 134        DEVCONF_AUTOCONF,
 135        DEVCONF_DAD_TRANSMITS,
 136        DEVCONF_RTR_SOLICITS,
 137        DEVCONF_RTR_SOLICIT_INTERVAL,
 138        DEVCONF_RTR_SOLICIT_DELAY,
 139#ifdef CONFIG_IPV6_PRIVACY
 140        DEVCONF_USE_TEMPADDR,
 141        DEVCONF_TEMP_VALID_LFT,
 142        DEVCONF_TEMP_PREFERED_LFT,
 143        DEVCONF_REGEN_MAX_RETRY,
 144        DEVCONF_MAX_DESYNC_FACTOR,
 145#endif
 146        DEVCONF_MAX
 147};
 148
 149#ifdef __KERNEL__
 150
 151/* 
 152   This structure contains results of exthdrs parsing
 153   as offsets from skb->nh.
 154 */
 155
 156struct inet6_skb_parm
 157{
 158        int                     iif;
 159        __u16                   ra;
 160        __u16                   hop;
 161        __u16                   auth;
 162        __u16                   dst0;
 163        __u16                   srcrt;
 164        __u16                   dst1;
 165};
 166
 167#endif
 168
 169#endif
 170