liminix/modules/hostapd/service.nix

52 lines
1.4 KiB
Nix

{
liminix
, hostapd
, output-template
, writeText
, lib
}:
{ interface, params} :
let
inherit (liminix.services) longrun;
inherit (lib) concatStringsSep mapAttrsToList;
# 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 = "${interface.name}.hostapd";
defaults = {
driver = "nl80211";
logger_syslog = "-1";
logger_syslog_level = 1;
ctrl_interface = "/run/hostapd";
ctrl_interface_group = 0;
};
attrs = defaults // params ;
literal_or_output = o:
let typ = builtins.typeOf o;
in if typ == "string"
then builtins.toJSON o
else if typ == "int"
then builtins.toJSON o
else "output(${builtins.toJSON o.service}, ${builtins.toJSON o.path})";
format_value = n : v:
"${n}={{ ${literal_or_output v} }}";
conf =
(writeText "hostapd.conf.in"
((concatStringsSep
"\n"
(mapAttrsToList
format_value
attrs)) + "\n"));
in longrun {
inherit name;
dependencies = [ interface ];
run = ''
${output-template}/bin/output-template '{{' '}}' < ${conf} > /run/${name}.conf
exec ${hostapd}/bin/hostapd -i $(output ${interface} ifname) -P /run/${name}.pid -S /run/${name}.conf
'';
}