src/network/networkd-radv.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright (C) 2017 Intel Corporation. All rights reserved.
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <netinet/icmp6.h>
  21 #include <arpa/inet.h>
  22
  23 #include "networkd-address.h"
  24 #include "networkd-radv.h"
  25 #include "sd-radv.h"
  26
  27 int radv_configure(Link *link) {
  28         int r;
  29         Prefix *p;
  30
  31         assert(link);
  32         assert(link->network);
  33
  34         r = sd_radv_new(&link->radv);
  35         if (r < 0)
  36                 return r;
  37
  38         r = sd_radv_attach_event(link->radv, NULL, 0);
  39         if (r < 0)
  40                 return r;
  41
  42         r = sd_radv_set_mac(link->radv, &link->mac);
  43         if (r < 0)
  44                 return r;
  45
  46         r = sd_radv_set_ifindex(link->radv, link->ifindex);
  47         if (r < 0)
  48                 return r;
  49
  50         r = sd_radv_set_managed_information(link->radv, link->network->router_managed);
  51         if (r < 0)
  52                 return r;
  53
  54         r = sd_radv_set_other_information(link->radv, link->network->router_other_information);
  55         if (r < 0)
  56                 return r;
  57
  58         /* a value of 0xffffffff represents infinity, 0x0 means this host is
  59            not a router */
  60         r = sd_radv_set_router_lifetime(link->radv,
  61                                         DIV_ROUND_UP(link->network->router_lifetime_usec, USEC_PER_SEC));
  62         if (r < 0)
  63                 return r;
  64
  65         if (link->network->router_lifetime_usec > 0) {
  66                 r = sd_radv_set_preference(link->radv,
  67                                            link->network->router_preference);
  68                 if (r < 0)
  69                         return r;
  70         }
  71
  72         LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
  73                 r = sd_radv_add_prefix(link->radv, p->radv_prefix);
  74                 if (r != -EEXIST && r < 0)
  75                         return r;
  76         }
  77
  78         if (link->network->router_dns) {
  79                 r = sd_radv_set_rdnss(link->radv,
  80                                       DIV_ROUND_UP(link->network->router_dns_lifetime_usec,
  81                                                    USEC_PER_SEC),
  82                                       link->network->router_dns,
  83                                       link->network->n_router_dns);
  84                 if (r < 0)
  85                         return r;
  86         }
  87
  88         return 0;
  89 }