liminix/modules/hostapd/service.nix

59 lines
1.7 KiB
Nix

{
liminix
, svc
, hostapd
, output-template
, writeText
, lib
}:
{ interface, params} :
let
inherit (liminix.services) longrun;
inherit (lib) concatStringsSep mapAttrsToList unique ;
inherit (builtins) map filter attrValues length head typeOf;
# This is not a friendly interface to configuring a wireless AP: it
# just passes everything straight through to the hostapd config.
# When we've worked out what the sensible options are to expose,
# we'll add them as top-level attributes and rename params to
# extraParams
name = "${interface.name}.hostapd";
defaults = {
driver = "nl80211";
logger_syslog = "-1";
logger_syslog_level = 1;
ctrl_interface = "/run/${name}";
ctrl_interface_group = 0;
};
attrs = defaults // params ;
literal_or_output = o: ({
string = builtins.toJSON;
int = builtins.toJSON;
lambda = (o: "output(${builtins.toJSON (o "service")}, ${builtins.toJSON (o "path")})");
}.${builtins.typeOf o}) o;
conf =
(writeText "hostapd.conf.in"
((concatStringsSep
"\n"
(mapAttrsToList
(n : v : "${n}={{ ${literal_or_output v} }}")
attrs)) + "\n"));
service = longrun {
inherit name;
dependencies = [ interface ];
run = ''
mkdir -p /run/${name}
chmod 0700 /run/${name}
${output-template}/bin/output-template '{{' '}}' < ${conf} > /run/${name}/hostapd.conf
exec ${hostapd}/bin/hostapd -i $(output ${interface} ifname) -P /run/${name}/hostapd.pid -S /run/${name}/hostapd.conf
'';
};
watch = filter (f: typeOf f == "set") (attrValues attrs);
in svc.secrets.subscriber.build {
inherit watch;
inherit service;
action = "restart-all";
}