include/uapi/linux/ipv6.h

   1 #ifndef _UAPI_IPV6_H
   2 #define _UAPI_IPV6_H
   3
   4 #include <linux/libc-compat.h>
   5 #include <linux/types.h>
   6 #include <linux/in6.h>
   7 #include <asm/byteorder.h>
   8
   9 /* The latest drafts declared increase in minimal mtu up to 1280. */
  10
  11 #define IPV6_MIN_MTU    1280
  12
  13 /*
  14  *      Advanced API
  15  *      source interface/address selection, source routing, etc...
  16  *      *under construction*
  17  */
  18
  19 #if __UAPI_DEF_IN6_PKTINFO
  20 struct in6_pktinfo {
  21         struct in6_addr ipi6_addr;
  22         int             ipi6_ifindex;
  23 };
  24 #endif
  25
  26 #if __UAPI_DEF_IP6_MTUINFO
  27 struct ip6_mtuinfo {
  28         struct sockaddr_in6     ip6m_addr;
  29         __u32                   ip6m_mtu;
  30 };
  31 #endif
  32
  33 struct in6_ifreq {
  34         struct in6_addr ifr6_addr;
  35         __u32           ifr6_prefixlen;
  36         int             ifr6_ifindex;
  37 };
  38
  39 #define IPV6_SRCRT_STRICT       0x01    /* Deprecated; will be removed */
  40 #define IPV6_SRCRT_TYPE_0       0       /* Deprecated; will be removed */
  41 #define IPV6_SRCRT_TYPE_2       2       /* IPv6 type 2 Routing Header   */
  42 #define IPV6_SRCRT_TYPE_4       4       /* Segment Routing with IPv6 */
  43
  44 /*
  45  *      routing header
  46  */
  47 struct ipv6_rt_hdr {
  48         __u8            nexthdr;
  49         __u8            hdrlen;
  50         __u8            type;
  51         __u8            segments_left;
  52
  53         /*
  54          *      type specific data
  55          *      variable length field
  56          */
  57 };
  58
  59
  60 struct ipv6_opt_hdr {
  61         __u8            nexthdr;
  62         __u8            hdrlen;
  63         /*
  64          * TLV encoded option data follows.
  65          */
  66 } __attribute__((packed));      /* required for some archs */
  67
  68 #define ipv6_destopt_hdr ipv6_opt_hdr
  69 #define ipv6_hopopt_hdr  ipv6_opt_hdr
  70
  71 /* Router Alert option values (RFC2711) */
  72 #define IPV6_OPT_ROUTERALERT_MLD        0x0000  /* MLD(RFC2710) */
  73
  74 /*
  75  *      routing header type 0 (used in cmsghdr struct)
  76  */
  77
  78 struct rt0_hdr {
  79         struct ipv6_rt_hdr      rt_hdr;
  80         __u32                   reserved;
  81         struct in6_addr         addr[0];
  82
  83 #define rt0_type                rt_hdr.type
  84 };
  85
  86 /*
  87  *      routing header type 2
  88  */
  89
  90 struct rt2_hdr {
  91         struct ipv6_rt_hdr      rt_hdr;
  92         __u32                   reserved;
  93         struct in6_addr         addr;
  94
  95 #define rt2_type                rt_hdr.type
  96 };
  97
  98 /*
  99  *      home address option in destination options header
 100  */
 101
 102 struct ipv6_destopt_hao {
 103         __u8                    type;
 104         __u8                    length;
 105         struct in6_addr         addr;
 106 } __attribute__((packed));
 107
 108 /*
 109  *      IPv6 fixed header
 110  *
 111  *      BEWARE, it is incorrect. The first 4 bits of flow_lbl
 112  *      are glued to priority now, forming "class".
 113  */
 114
 115 struct ipv6hdr {
 116 #if defined(__LITTLE_ENDIAN_BITFIELD)
 117         __u8                    priority:4,
 118                                 version:4;
 119 #elif defined(__BIG_ENDIAN_BITFIELD)
 120         __u8                    version:4,
 121                                 priority:4;
 122 #else
 123 #error  "Please fix <asm/byteorder.h>"
 124 #endif
 125         __u8                    flow_lbl[3];
 126
 127         __be16                  payload_len;
 128         __u8                    nexthdr;
 129         __u8                    hop_limit;
 130
 131         struct  in6_addr        saddr;
 132         struct  in6_addr        daddr;
 133 };
 134
 135
 136 /* index values for the variables in ipv6_devconf */
 137 enum {
 138         DEVCONF_FORWARDING = 0,
 139         DEVCONF_HOPLIMIT,
 140         DEVCONF_MTU6,
 141         DEVCONF_ACCEPT_RA,
 142         DEVCONF_ACCEPT_REDIRECTS,
 143         DEVCONF_AUTOCONF,
 144         DEVCONF_DAD_TRANSMITS,
 145         DEVCONF_RTR_SOLICITS,
 146         DEVCONF_RTR_SOLICIT_INTERVAL,
 147         DEVCONF_RTR_SOLICIT_DELAY,
 148         DEVCONF_USE_TEMPADDR,
 149         DEVCONF_TEMP_VALID_LFT,
 150         DEVCONF_TEMP_PREFERED_LFT,
 151         DEVCONF_REGEN_MAX_RETRY,
 152         DEVCONF_MAX_DESYNC_FACTOR,
 153         DEVCONF_MAX_ADDRESSES,
 154         DEVCONF_FORCE_MLD_VERSION,
 155         DEVCONF_ACCEPT_RA_DEFRTR,
 156         DEVCONF_ACCEPT_RA_PINFO,
 157         DEVCONF_ACCEPT_RA_RTR_PREF,
 158         DEVCONF_RTR_PROBE_INTERVAL,
 159         DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
 160         DEVCONF_PROXY_NDP,
 161         DEVCONF_OPTIMISTIC_DAD,
 162         DEVCONF_ACCEPT_SOURCE_ROUTE,
 163         DEVCONF_MC_FORWARDING,
 164         DEVCONF_DISABLE_IPV6,
 165         DEVCONF_ACCEPT_DAD,
 166         DEVCONF_FORCE_TLLAO,
 167         DEVCONF_NDISC_NOTIFY,
 168         DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL,
 169         DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL,
 170         DEVCONF_SUPPRESS_FRAG_NDISC,
 171         DEVCONF_ACCEPT_RA_FROM_LOCAL,
 172         DEVCONF_USE_OPTIMISTIC,
 173         DEVCONF_ACCEPT_RA_MTU,
 174         DEVCONF_STABLE_SECRET,
 175         DEVCONF_USE_OIF_ADDRS_ONLY,
 176         DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT,
 177         DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN,
 178         DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
 179         DEVCONF_DROP_UNSOLICITED_NA,
 180         DEVCONF_KEEP_ADDR_ON_DOWN,
 181         DEVCONF_RTR_SOLICIT_MAX_INTERVAL,
 182         DEVCONF_SEG6_ENABLED,
 183         DEVCONF_SEG6_REQUIRE_HMAC,
 184         DEVCONF_ENHANCED_DAD,
 185         DEVCONF_ADDR_GEN_MODE,
 186         DEVCONF_DISABLE_POLICY,
 187         DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN,
 188         DEVCONF_MAX
 189 };
 190
 191
 192 #endif /* _UAPI_IPV6_H */