src/libsystemd-network/radv-internal.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright (C) 2017 Intel Corporation. All rights reserved.
   8
   9   systemd is free software; you can redistribute it and/or modify it
  10   under the terms of the GNU Lesser General Public License as published by
  11   the Free Software Foundation; either version 2.1 of the License, or
  12   (at your option) any later version.
  13
  14   systemd is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   Lesser General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21 ***/
  22
  23 #include "sd-radv.h"
  24
  25 #include "log.h"
  26 #include "list.h"
  27 #include "sparse-endian.h"
  28
  29 assert_cc(SD_RADV_DEFAULT_MIN_TIMEOUT_USEC <= SD_RADV_DEFAULT_MAX_TIMEOUT_USEC)
  30
  31 #define SD_RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC (16*USEC_PER_SEC)
  32 #define SD_RADV_MAX_INITIAL_RTR_ADVERTISEMENTS  3
  33 #define SD_RADV_MAX_FINAL_RTR_ADVERTISEMENTS    3
  34 #define SD_RADV_MIN_DELAY_BETWEEN_RAS           3
  35 #define SD_RADV_MAX_RA_DELAY_TIME_USEC          (500*USEC_PER_MSEC)
  36
  37 #define SD_RADV_OPT_RDNSS                       25
  38 #define SD_RADV_OPT_DNSSL                       31
  39
  40 enum RAdvState {
  41         SD_RADV_STATE_IDLE                      = 0,
  42         SD_RADV_STATE_ADVERTISING               = 1,
  43 };
  44 typedef enum RAdvState RAdvState;
  45
  46 struct sd_radv_opt_dns {
  47         uint8_t type;
  48         uint8_t length;
  49         uint16_t reserved;
  50         be32_t lifetime;
  51 } _packed_;
  52
  53 struct sd_radv {
  54         unsigned n_ref;
  55         RAdvState state;
  56
  57         int ifindex;
  58
  59         sd_event *event;
  60         int event_priority;
  61
  62         struct ether_addr mac_addr;
  63         uint8_t hop_limit;
  64         uint8_t flags;
  65         uint32_t mtu;
  66         uint16_t lifetime;
  67
  68         int fd;
  69         unsigned ra_sent;
  70         sd_event_source *recv_event_source;
  71         sd_event_source *timeout_event_source;
  72
  73         unsigned n_prefixes;
  74         LIST_HEAD(sd_radv_prefix, prefixes);
  75
  76         size_t n_rdnss;
  77         struct sd_radv_opt_dns *rdnss;
  78         struct sd_radv_opt_dns *dnssl;
  79 };
  80
  81 struct sd_radv_prefix {
  82         unsigned n_ref;
  83
  84         struct {
  85                 uint8_t type;
  86                 uint8_t length;
  87                 uint8_t prefixlen;
  88                 uint8_t flags;
  89                 be32_t valid_lifetime;
  90                 be32_t preferred_lifetime;
  91                 uint32_t reserved;
  92                 struct in6_addr in6_addr;
  93         } _packed_ opt;
  94
  95         LIST_FIELDS(struct sd_radv_prefix, prefix);
  96 };
  97
  98 #define log_radv_full(level, error, fmt, ...) log_internal(level, error, __FILE__, __LINE__, __func__, "RADV: " fmt, ##__VA_ARGS__)
  99 #define log_radv_errno(error, fmt, ...) log_radv_full(LOG_DEBUG, error, fmt, ##__VA_ARGS__)
 100 #define log_radv_warning_errno(error, fmt, ...) log_radv_full(LOG_WARNING, error, fmt, ##__VA_ARGS__)
 101 #define log_radv(fmt, ...) log_radv_errno(0, fmt, ##__VA_ARGS__)