include/uapi/linux/ipv6.h

   1 #ifndef _UAPI_IPV6_H
   2 #define _UAPI_IPV6_H
   3
   4 #include <linux/types.h>
   5 #include <linux/in6.h>
   6 #include <asm/byteorder.h>
   7
   8 /* The latest drafts declared increase in minimal mtu up to 1280. */
   9
  10 #define IPV6_MIN_MTU    1280
  11
  12 /*
  13  *      Advanced API
  14  *      source interface/address selection, source routing, etc...
  15  *      *under construction*
  16  */
  17
  18
  19 struct in6_pktinfo {
  20         struct in6_addr ipi6_addr;
  21         int             ipi6_ifindex;
  22 };
  23
  24 struct ip6_mtuinfo {
  25         struct sockaddr_in6     ip6m_addr;
  26         __u32                   ip6m_mtu;
  27 };
  28
  29 struct in6_ifreq {
  30         struct in6_addr ifr6_addr;
  31         __u32           ifr6_prefixlen;
  32         int             ifr6_ifindex;
  33 };
  34
  35 #define IPV6_SRCRT_STRICT       0x01    /* Deprecated; will be removed */
  36 #define IPV6_SRCRT_TYPE_0       0       /* Deprecated; will be removed */
  37 #define IPV6_SRCRT_TYPE_2       2       /* IPv6 type 2 Routing Header   */
  38
  39 /*
  40  *      routing header
  41  */
  42 struct ipv6_rt_hdr {
  43         __u8            nexthdr;
  44         __u8            hdrlen;
  45         __u8            type;
  46         __u8            segments_left;
  47
  48         /*
  49          *      type specific data
  50          *      variable length field
  51          */
  52 };
  53
  54
  55 struct ipv6_opt_hdr {
  56         __u8            nexthdr;
  57         __u8            hdrlen;
  58         /*
  59          * TLV encoded option data follows.
  60          */
  61 } __attribute__((packed));      /* required for some archs */
  62
  63 #define ipv6_destopt_hdr ipv6_opt_hdr
  64 #define ipv6_hopopt_hdr  ipv6_opt_hdr
  65
  66 /* Router Alert option values (RFC2711) */
  67 #define IPV6_OPT_ROUTERALERT_MLD        0x0000  /* MLD(RFC2710) */
  68
  69 /*
  70  *      routing header type 0 (used in cmsghdr struct)
  71  */
  72
  73 struct rt0_hdr {
  74         struct ipv6_rt_hdr      rt_hdr;
  75         __u32                   reserved;
  76         struct in6_addr         addr[0];
  77
  78 #define rt0_type                rt_hdr.type
  79 };
  80
  81 /*
  82  *      routing header type 2
  83  */
  84
  85 struct rt2_hdr {
  86         struct ipv6_rt_hdr      rt_hdr;
  87         __u32                   reserved;
  88         struct in6_addr         addr;
  89
  90 #define rt2_type                rt_hdr.type
  91 };
  92
  93 /*
  94  *      home address option in destination options header
  95  */
  96
  97 struct ipv6_destopt_hao {
  98         __u8                    type;
  99         __u8                    length;
 100         struct in6_addr         addr;
 101 } __attribute__((packed));
 102
 103 /*
 104  *      IPv6 fixed header
 105  *
 106  *      BEWARE, it is incorrect. The first 4 bits of flow_lbl
 107  *      are glued to priority now, forming "class".
 108  */
 109
 110 struct ipv6hdr {
 111 #if defined(__LITTLE_ENDIAN_BITFIELD)
 112         __u8                    priority:4,
 113                                 version:4;
 114 #elif defined(__BIG_ENDIAN_BITFIELD)
 115         __u8                    version:4,
 116                                 priority:4;
 117 #else
 118 #error  "Please fix <asm/byteorder.h>"
 119 #endif
 120         __u8                    flow_lbl[3];
 121
 122         __be16                  payload_len;
 123         __u8                    nexthdr;
 124         __u8                    hop_limit;
 125
 126         struct  in6_addr        saddr;
 127         struct  in6_addr        daddr;
 128 };
 129
 130
 131 /* index values for the variables in ipv6_devconf */
 132 enum {
 133         DEVCONF_FORWARDING = 0,
 134         DEVCONF_HOPLIMIT,
 135         DEVCONF_MTU6,
 136         DEVCONF_ACCEPT_RA,
 137         DEVCONF_ACCEPT_REDIRECTS,
 138         DEVCONF_AUTOCONF,
 139         DEVCONF_DAD_TRANSMITS,
 140         DEVCONF_RTR_SOLICITS,
 141         DEVCONF_RTR_SOLICIT_INTERVAL,
 142         DEVCONF_RTR_SOLICIT_DELAY,
 143         DEVCONF_USE_TEMPADDR,
 144         DEVCONF_TEMP_VALID_LFT,
 145         DEVCONF_TEMP_PREFERED_LFT,
 146         DEVCONF_REGEN_MAX_RETRY,
 147         DEVCONF_MAX_DESYNC_FACTOR,
 148         DEVCONF_MAX_ADDRESSES,
 149         DEVCONF_FORCE_MLD_VERSION,
 150         DEVCONF_ACCEPT_RA_DEFRTR,
 151         DEVCONF_ACCEPT_RA_PINFO,
 152         DEVCONF_ACCEPT_RA_RTR_PREF,
 153         DEVCONF_RTR_PROBE_INTERVAL,
 154         DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
 155         DEVCONF_PROXY_NDP,
 156         DEVCONF_OPTIMISTIC_DAD,
 157         DEVCONF_ACCEPT_SOURCE_ROUTE,
 158         DEVCONF_MC_FORWARDING,
 159         DEVCONF_DISABLE_IPV6,
 160         DEVCONF_ACCEPT_DAD,
 161         DEVCONF_FORCE_TLLAO,
 162         DEVCONF_NDISC_NOTIFY,
 163         DEVCONF_MAX
 164 };
 165
 166
 167 #endif /* _UAPI_IPV6_H */