include/uapi/linux/ioam6_iptunnel.h

   1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
   2 /*
   3  *  IPv6 IOAM Lightweight Tunnel API
   4  *
   5  *  Author:
   6  *  Justin Iurman <justin.iurman@uliege.be>
   7  */
   8
   9 #ifndef _UAPI_LINUX_IOAM6_IPTUNNEL_H
  10 #define _UAPI_LINUX_IOAM6_IPTUNNEL_H
  11
  12 /* Encap modes:
  13  *  - inline: direct insertion
  14  *  - encap: ip6ip6 encapsulation
  15  *  - auto: inline for local packets, encap for in-transit packets
  16  */
  17 enum {
  18         __IOAM6_IPTUNNEL_MODE_MIN,
  19
  20         IOAM6_IPTUNNEL_MODE_INLINE,
  21         IOAM6_IPTUNNEL_MODE_ENCAP,
  22         IOAM6_IPTUNNEL_MODE_AUTO,
  23
  24         __IOAM6_IPTUNNEL_MODE_MAX,
  25 };
  26
  27 #define IOAM6_IPTUNNEL_MODE_MIN (__IOAM6_IPTUNNEL_MODE_MIN + 1)
  28 #define IOAM6_IPTUNNEL_MODE_MAX (__IOAM6_IPTUNNEL_MODE_MAX - 1)
  29
  30 enum {
  31         IOAM6_IPTUNNEL_UNSPEC,
  32
  33         /* Encap mode */
  34         IOAM6_IPTUNNEL_MODE,            /* u8 */
  35
  36         /* Tunnel dst address.
  37          * For encap,auto modes.
  38          */
  39         IOAM6_IPTUNNEL_DST,             /* struct in6_addr */
  40
  41         /* IOAM Trace Header */
  42         IOAM6_IPTUNNEL_TRACE,           /* struct ioam6_trace_hdr */
  43
  44         /* Insertion frequency:
  45          * "k over n" packets (0 < k <= n)
  46          * [0.0001% ... 100%]
  47          */
  48 #define IOAM6_IPTUNNEL_FREQ_MIN 1
  49 #define IOAM6_IPTUNNEL_FREQ_MAX 1000000
  50         IOAM6_IPTUNNEL_FREQ_K,          /* u32 */
  51         IOAM6_IPTUNNEL_FREQ_N,          /* u32 */
  52
  53         /* Tunnel src address.
  54          * For encap,auto modes.
  55          * Optional (automatic if not provided).
  56          */
  57         IOAM6_IPTUNNEL_SRC,             /* struct in6_addr */
  58
  59         __IOAM6_IPTUNNEL_MAX,
  60 };
  61
  62 #define IOAM6_IPTUNNEL_MAX (__IOAM6_IPTUNNEL_MAX - 1)
  63
  64 #endif /* _UAPI_LINUX_IOAM6_IPTUNNEL_H */