src/libsystemd-network/ndisc-router.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright (C) 2014 Intel Corporation. All rights reserved.
   8 ***/
   9
  10 #include "sd-ndisc.h"
  11
  12 #include "time-util.h"
  13
  14 struct sd_ndisc_router {
  15         unsigned n_ref;
  16
  17         triple_timestamp timestamp;
  18         struct in6_addr address;
  19
  20         /* The raw packet size. The data is appended to the object, accessible via NDIS_ROUTER_RAW() */
  21         size_t raw_size;
  22
  23         /* The current read index for the iterative option interface */
  24         size_t rindex;
  25
  26         uint64_t flags;
  27         unsigned preference;
  28         uint16_t lifetime;
  29
  30         uint8_t hop_limit;
  31         uint32_t mtu;
  32 };
  33
  34 static inline void* NDISC_ROUTER_RAW(const sd_ndisc_router *rt) {
  35         return (uint8_t*) rt + ALIGN(sizeof(sd_ndisc_router));
  36 }
  37
  38 static inline void *NDISC_ROUTER_OPTION_DATA(const sd_ndisc_router *rt) {
  39         return ((uint8_t*) NDISC_ROUTER_RAW(rt)) + rt->rindex;
  40 }
  41
  42 static inline uint8_t NDISC_ROUTER_OPTION_TYPE(const sd_ndisc_router *rt) {
  43         return ((uint8_t*) NDISC_ROUTER_OPTION_DATA(rt))[0];
  44 }
  45 static inline size_t NDISC_ROUTER_OPTION_LENGTH(const sd_ndisc_router *rt) {
  46         return ((uint8_t*) NDISC_ROUTER_OPTION_DATA(rt))[1] * 8;
  47 }
  48
  49 sd_ndisc_router *ndisc_router_new(size_t raw_size);
  50 int ndisc_router_parse(sd_ndisc_router *rt);