networking: dhcp: switch to kea

1 files changed, 39 insertions, 15 deletions

diff --git a/config/networking/services/dhcp.nix b/config/networking/services/dhcp.nix
index 15dce43..360eb66 100644
--- a/config/networking/services/dhcp.nix
+++ b/config/networking/services/dhcp.nix
@@ -1,21 +1,45 @@
 { config, ... }:
 
-let
-  makeSubnet = network: ''
-    subnet ${network.subnet}.0 netmask 255.255.255.0 {
-      option broadcast-address ${network.subnet}.255;
-      option routers ${network.machines.self.address};
-      interface ${network.interface};
-      range ${network.subnet}.10 ${network.subnet}.99;
-    }
-  '';
+let nets = config.personal.networking.networks;
 in {
-  services.dhcpd4 = with config.personal.networking.networks; {
+  services.kea.dhcp4 = {
     enable = true;
-    interfaces = [ wan.interface iot.interface ];
-    extraConfig = ''
-      option domain-name-servers ${lan.subnet}.1, 9.9.9.9;
-      option subnet-mask 255.255.255.0;
-    '' + makeSubnet wan + makeSubnet iot;
+    settings = let subnets = with nets; [ wan iot ];
+    in {
+      interfaces-config.interfaces =
+        builtins.map (network: network.interface) subnets;
+      lease-database = {
+        name = "/var/lib/kea/dhcp4.leases";
+        persist = true;
+        type = "memfile";
+      };
+      valid-lifetime = 600;
+      max-valid-lifetime = 7200;
+      option-data = [
+        {
+          name = "domain-name-servers";
+          data = "${nets.lan.subnet}.1, 9.9.9.9";
+        }
+        {
+          name = "subnet-mask";
+          data = "255.255.255.0";
+        }
+      ];
+      subnet4 = builtins.map (network: {
+        subnet = "${network.subnet}.0/24";
+        option-data = [
+          {
+            name = "broadcast-address";
+            data = "${network.subnet}.255";
+          }
+          {
+            name = "routers";
+            data = network.machines.self.address;
+          }
+        ];
+        inherit (network) interface;
+        pools = [{ pool = "${network.subnet}.10 - ${network.subnet}.99"; }];
+      }) subnets;
+    };
   };
 }