include/uapi/linux/ipv6.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef _UAPI_IPV6_H
   3 #define _UAPI_IPV6_H
   4
   5 #include <linux/libc-compat.h>
   6 #include <linux/types.h>
   7 #include <linux/stddef.h>
   8 #include <linux/in6.h>
   9 #include <asm/byteorder.h>
  10
  11 /* The latest drafts declared increase in minimal mtu up to 1280. */
  12
  13 #define IPV6_MIN_MTU    1280
  14
  15 /*
  16  *      Advanced API
  17  *      source interface/address selection, source routing, etc...
  18  *      *under construction*
  19  */
  20
  21 #if __UAPI_DEF_IN6_PKTINFO
  22 struct in6_pktinfo {
  23         struct in6_addr ipi6_addr;
  24         int             ipi6_ifindex;
  25 };
  26 #endif
  27
  28 #if __UAPI_DEF_IP6_MTUINFO
  29 struct ip6_mtuinfo {
  30         struct sockaddr_in6     ip6m_addr;
  31         __u32                   ip6m_mtu;
  32 };
  33 #endif
  34
  35 struct in6_ifreq {
  36         struct in6_addr ifr6_addr;
  37         __u32           ifr6_prefixlen;
  38         int             ifr6_ifindex;
  39 };
  40
  41 #define IPV6_SRCRT_STRICT       0x01    /* Deprecated; will be removed */
  42 #define IPV6_SRCRT_TYPE_0       0       /* Deprecated; will be removed */
  43 #define IPV6_SRCRT_TYPE_2       2       /* IPv6 type 2 Routing Header   */
  44 #define IPV6_SRCRT_TYPE_3       3       /* RPL Segment Routing with IPv6 */
  45 #define IPV6_SRCRT_TYPE_4       4       /* Segment Routing with IPv6 */
  46
  47 /*
  48  *      routing header
  49  */
  50 struct ipv6_rt_hdr {
  51         __u8            nexthdr;
  52         __u8            hdrlen;
  53         __u8            type;
  54         __u8            segments_left;
  55
  56         /*
  57          *      type specific data
  58          *      variable length field
  59          */
  60 };
  61
  62
  63 struct ipv6_opt_hdr {
  64         __u8            nexthdr;
  65         __u8            hdrlen;
  66         /*
  67          * TLV encoded option data follows.
  68          */
  69 } __attribute__((packed));      /* required for some archs */
  70
  71 #define ipv6_destopt_hdr ipv6_opt_hdr
  72 #define ipv6_hopopt_hdr  ipv6_opt_hdr
  73
  74 /* Router Alert option values (RFC2711) */
  75 #define IPV6_OPT_ROUTERALERT_MLD        0x0000  /* MLD(RFC2710) */
  76
  77 /*
  78  *      routing header type 0 (used in cmsghdr struct)
  79  */
  80
  81 struct rt0_hdr {
  82         struct ipv6_rt_hdr      rt_hdr;
  83         __u32                   reserved;
  84         struct in6_addr         addr[];
  85
  86 #define rt0_type                rt_hdr.type
  87 };
  88
  89 /*
  90  *      routing header type 2
  91  */
  92
  93 struct rt2_hdr {
  94         struct ipv6_rt_hdr      rt_hdr;
  95         __u32                   reserved;
  96         struct in6_addr         addr;
  97
  98 #define rt2_type                rt_hdr.type
  99 };
 100
 101 /*
 102  *      home address option in destination options header
 103  */
 104
 105 struct ipv6_destopt_hao {
 106         __u8                    type;
 107         __u8                    length;
 108         struct in6_addr         addr;
 109 } __attribute__((packed));
 110
 111 /*
 112  *      IPv6 fixed header
 113  *
 114  *      BEWARE, it is incorrect. The first 4 bits of flow_lbl
 115  *      are glued to priority now, forming "class".
 116  */
 117
 118 struct ipv6hdr {
 119 #if defined(__LITTLE_ENDIAN_BITFIELD)
 120         __u8                    priority:4,
 121                                 version:4;
 122 #elif defined(__BIG_ENDIAN_BITFIELD)
 123         __u8                    version:4,
 124                                 priority:4;
 125 #else
 126 #error  "Please fix <asm/byteorder.h>"
 127 #endif
 128         __u8                    flow_lbl[3];
 129
 130         __be16                  payload_len;
 131         __u8                    nexthdr;
 132         __u8                    hop_limit;
 133
 134         __struct_group(/* no tag */, addrs, /* no attrs */,
 135                 struct  in6_addr        saddr;
 136                 struct  in6_addr        daddr;
 137         );
 138 };
 139
 140
 141 /* index values for the variables in ipv6_devconf */
 142 enum {
 143         DEVCONF_FORWARDING = 0,
 144         DEVCONF_HOPLIMIT,
 145         DEVCONF_MTU6,
 146         DEVCONF_ACCEPT_RA,
 147         DEVCONF_ACCEPT_REDIRECTS,
 148         DEVCONF_AUTOCONF,
 149         DEVCONF_DAD_TRANSMITS,
 150         DEVCONF_RTR_SOLICITS,
 151         DEVCONF_RTR_SOLICIT_INTERVAL,
 152         DEVCONF_RTR_SOLICIT_DELAY,
 153         DEVCONF_USE_TEMPADDR,
 154         DEVCONF_TEMP_VALID_LFT,
 155         DEVCONF_TEMP_PREFERED_LFT,
 156         DEVCONF_REGEN_MAX_RETRY,
 157         DEVCONF_MAX_DESYNC_FACTOR,
 158         DEVCONF_MAX_ADDRESSES,
 159         DEVCONF_FORCE_MLD_VERSION,
 160         DEVCONF_ACCEPT_RA_DEFRTR,
 161         DEVCONF_ACCEPT_RA_PINFO,
 162         DEVCONF_ACCEPT_RA_RTR_PREF,
 163         DEVCONF_RTR_PROBE_INTERVAL,
 164         DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
 165         DEVCONF_PROXY_NDP,
 166         DEVCONF_OPTIMISTIC_DAD,
 167         DEVCONF_ACCEPT_SOURCE_ROUTE,
 168         DEVCONF_MC_FORWARDING,
 169         DEVCONF_DISABLE_IPV6,
 170         DEVCONF_ACCEPT_DAD,
 171         DEVCONF_FORCE_TLLAO,
 172         DEVCONF_NDISC_NOTIFY,
 173         DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL,
 174         DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL,
 175         DEVCONF_SUPPRESS_FRAG_NDISC,
 176         DEVCONF_ACCEPT_RA_FROM_LOCAL,
 177         DEVCONF_USE_OPTIMISTIC,
 178         DEVCONF_ACCEPT_RA_MTU,
 179         DEVCONF_STABLE_SECRET,
 180         DEVCONF_USE_OIF_ADDRS_ONLY,
 181         DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT,
 182         DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN,
 183         DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
 184         DEVCONF_DROP_UNSOLICITED_NA,
 185         DEVCONF_KEEP_ADDR_ON_DOWN,
 186         DEVCONF_RTR_SOLICIT_MAX_INTERVAL,
 187         DEVCONF_SEG6_ENABLED,
 188         DEVCONF_SEG6_REQUIRE_HMAC,
 189         DEVCONF_ENHANCED_DAD,
 190         DEVCONF_ADDR_GEN_MODE,
 191         DEVCONF_DISABLE_POLICY,
 192         DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN,
 193         DEVCONF_NDISC_TCLASS,
 194         DEVCONF_RPL_SEG_ENABLED,
 195         DEVCONF_RA_DEFRTR_METRIC,
 196         DEVCONF_IOAM6_ENABLED,
 197         DEVCONF_IOAM6_ID,
 198         DEVCONF_IOAM6_ID_WIDE,
 199         DEVCONF_NDISC_EVICT_NOCARRIER,
 200         DEVCONF_ACCEPT_UNTRACKED_NA,
 201         DEVCONF_ACCEPT_RA_MIN_LFT,
 202         DEVCONF_MAX
 203 };
 204
 205
 206 #endif /* _UAPI_IPV6_H */