1 files changed, 82 insertions, 10 deletions
diff --git a/os/kay/modules/router.nix b/os/kay/modules/router.nix
index 0d01465..7cd3763 100644
--- a/os/kay/modules/router.nix
+++ b/os/kay/modules/router.nix
@@ -1,12 +1,20 @@
-{ ... }: let
+{ lib, pkgs, ... }: let
   wanInterface = "ppp0";
+  wanMTU = 1492;
+
+  gponInterface = "enp3s0";
+  gponHost = "192.168.38.1";
+  gponPrefix = 24;
 
   lanInterface = "enp8s0f3u1";
-  subnet = "10.0.0.0";
+  subnet = "192.168.43.0";
   prefix = 24;
-  host = "10.0.0.1";
-  leaseRangeStart = "10.0.0.100";
-  leaseRangeEnd = "10.0.0.254";
+  host = "192.168.43.1";
+  leaseRangeStart = "192.168.43.100";
+  leaseRangeEnd = "192.168.43.254";
+
+  wapMac = "40:86:cb:d7:40:49";
+  wapIp = "192.168.43.2";
 in {
   imports = [
     ./wireguard.nix
@@ -19,11 +27,20 @@ in {
       externalInterface = wanInterface;
       internalInterfaces = [ lanInterface ];
     };
-    interfaces."${lanInterface}" = {
-      ipv4.addresses = [{ 
-        address = host;
-        prefixLength  = prefix;
+    interfaces = {
+      ${lanInterface}.ipv4.addresses = [{
+          address = host;
+          prefixLength  = prefix;
+      }];
+      ${gponInterface}.ipv4.addresses = [{
+          address = gponHost;
+          prefixLength  = gponPrefix;
       }];
+      # TODO: fix it upstream
+      # https://github.com/NixOS/nixpkgs/blob/e8c38b73aeb218e27163376a2d617e61a2ad9b59/nixos/modules/services/networking/dhcpcd.nix#L13
+      # without this dhcpcd will not run, and if we set it to wanInterface,
+      # when pppd(ppp0 iface) exit it'll take out wan vlan iface as well
+      ${wanInterface}.useDHCP = true;
     };
     firewall = {
       allowedUDPPorts = [ 53 67 ];
@@ -39,9 +56,64 @@ in {
       '';
     };
   };
-
   services.dnsmasq.settings = {
     dhcp-range = [ "${leaseRangeStart},${leaseRangeEnd}" ];
+    dhcp-host = "${wapMac},${wapIp}";
     interface = [ lanInterface ];
   };
+
+  boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = 2;
+  networking.dhcpcd = {
+    allowInterfaces = [ wanInterface ];
+    IPv6rs = false;
+    wait = "ipv6";
+    extraConfig = ''
+      ipv6only
+      interface ${wanInterface}
+        ipv6rs
+        ia_pd 1 ${lanInterface}/0
+    '';
+  };
+
+  # we start the services using pppd script
+  systemd.services = {
+    dhcpcd = {
+      before = lib.mkForce [];
+      wants = lib.mkForce [];
+      wantedBy = lib.mkForce [];
+    };
+    radvd = {
+      after = lib.mkForce [];
+      requires = lib.mkForce[];
+      wantedBy = lib.mkForce [];
+    };
+  };
+  services = {
+    pppd.script."ipv6" = {
+      runtimeInputs = [ pkgs.systemd pkgs.gnugrep pkgs.iproute2 ];
+      text = ''
+        systemctl restart dhcpcd.service
+        systemctl restart radvd.service
+      '';
+    };
+    radvd = {
+      enable = lib.mkForce true;
+      config = ''
+        interface ${lanInterface} {
+          AdvSendAdvert on;
+          AdvDefaultPreference high;
+          AdvLinkMTU ${toString wanMTU};
+
+          MinRtrAdvInterval 3;
+          MaxRtrAdvInterval 6;
+          AdvDefaultLifetime 60;
+
+          prefix ::/64 {
+            AdvPreferredLifetime 30;
+            AdvValidLifetime 60;
+          };
+        };
+      '';
+    };
+  };
 }