src/libsystemd-network/ndisc-router.h

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