add service fir dhcp v4 client

This commit is contained in:
Daniel Barlow 2023-08-28 15:10:53 +01:00
parent 31f0213b6f
commit 00c8ea66ea
3 changed files with 65 additions and 7 deletions

View file

@ -20,6 +20,14 @@ in {
description = "network interface address";
type = liminix.lib.types.serviceDefn;
};
dhcp = {
client = mkOption {
# this needs to move to its own service as it has
# busybox config
description = "DHCP v4 client";
type = liminix.lib.types.serviceDefn;
};
};
};
};
config = {
@ -49,6 +57,12 @@ in {
type = types.ints.between 0 128;
};
};
dhcp.client = liminix.callService ./dhcpc.nix {
interface = mkOption {
type = liminix.lib.types.service;
};
};
};
};
}

46
modules/network/dhcpc.nix Normal file
View file

@ -0,0 +1,46 @@
{
liminix
, writeAshScript
, serviceFns
, lib
} :
{ interface }:
let
inherit (liminix.services) longrun;
name = "${interface.name}.dhcpc";
script = writeAshScript "dhcp-notify" { } ''
. ${serviceFns}
exec 2>&1
action=$1
set_address() {
ip address replace $ip/$mask dev $interface
(in_outputs ${name}
for i in lease mask ip router siaddr dns serverid subnet opt53 interface ; do
printenv $i > $i
done)
}
case $action in
deconfig)
ip address flush $interface
ip link set up dev $interface
;;
bound)
# this doesn't actually replace, it adds a new address.
set_address
echo >/proc/self/fd/10
;;
renew)
set_address
;;
nak)
echo "received NAK on $interface"
;;
esac
'';
in longrun {
inherit name;
run = "/bin/udhcpc -f -i $(output ${interface} ifname) -x hostname:$(cat /proc/sys/kernel/hostname) -s ${script}";
notification-fd = 10;
dependencies = [ interface ];
}

View file

@ -1,23 +1,21 @@
{ config, pkgs, ... } :
let
inherit (pkgs.liminix.networking) interface address udhcpc odhcpc route;
inherit (pkgs.liminix.networking) interface address route;
inherit (pkgs.liminix.services) oneshot longrun bundle target;
inherit (pkgs) writeText;
svc = config.system.service;
in rec {
imports = [
./modules/tftpboot.nix
./modules/wlan.nix
./modules/network
./modules/ntp
];
services.loopback = config.hardware.networkInterfaces.lo;
services.dhcpv4 =
let iface = interface { type = "hardware"; device = "eth1"; };
in udhcpc iface {};
services.dhcpv6 =
let iface = interface { type = "hardware"; device = "eth1"; };
in odhcpc iface { uid = "e7"; };
let iface = svc.network.link.build { ifname = "eth1"; };
in svc.network.dhcp.client.build { interface = iface; };
services.defaultroute4 = route {
name = "defautlrote";