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# Module for the IPv6 Router Advertisement Daemon.
{
config,
lib,
pkgs,
...
}:
with lib;
let
cfg = config.services.radvd;
confFile = pkgs.writeText "radvd.conf" cfg.config;
in
{
###### interface
options.services.radvd = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable the Router Advertisement Daemon
({command}`radvd`), which provides link-local
advertisements of IPv6 router addresses and prefixes using
the Neighbor Discovery Protocol (NDP). This enables
stateless address autoconfiguration in IPv6 clients on the
network.
'';
};
package = mkPackageOption pkgs "radvd" { };
debugLevel = mkOption {
type = types.ints.between 0 5;
default = 0;
example = 5;
description = ''
The debugging level is an integer in the range from 1 to 5,
from quiet to very verbose. A debugging level of 0 completely
turns off debugging.
'';
};
config = mkOption {
type = types.lines;
example = ''
interface eth0 {
AdvSendAdvert on;
prefix 2001:db8:1234:5678::/64 { };
};
'';
description = ''
The contents of the radvd configuration file.
'';
};
};
###### implementation
config = mkIf cfg.enable {
users.users.radvd = {
isSystemUser = true;
group = "radvd";
description = "Router Advertisement Daemon User";
};
users.groups.radvd = { };
systemd.services.radvd = {
description = "IPv6 Router Advertisement Daemon";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
serviceConfig = {
ExecStart = "@${cfg.package}/bin/radvd radvd -n -u radvd -d ${toString cfg.debugLevel} -C ${confFile}";
Restart = "always";
};
};
};
}
|
