nixpkgs/nixos/modules/services/networking/radvd.nix
Eelco Dolstra 29027fd1e1 Rewrite ‘with pkgs.lib’ -> ‘with lib’
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
2014-04-14 16:26:48 +02:00

78 lines
1.6 KiB
Nix

# 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 {
default = false;
description =
''
Whether to enable the Router Advertisement Daemon
(<command>radvd</command>), 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.
'';
};
services.radvd.config = mkOption {
example =
''
interface eth0 {
AdvSendAdvert on;
prefix 2001:db8:1234:5678::/64 { };
};
'';
description =
''
The contents of the radvd configuration file.
'';
};
};
###### implementation
config = mkIf cfg.enable {
environment.systemPackages = [ pkgs.radvd ];
jobs.radvd =
{ description = "IPv6 Router Advertisement Daemon";
startOn = "started network-interfaces";
preStart =
''
# !!! Radvd only works if IPv6 forwarding is enabled. But
# this should probably be done somewhere else (and not
# necessarily for all interfaces).
echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
'';
exec = "${pkgs.radvd}/sbin/radvd -m syslog -s -C ${confFile}";
daemonType = "fork";
};
};
}