1 files changed, 132 insertions, 2 deletions

diff --git a/hosts/vidhar/dsl.nix b/hosts/vidhar/dsl.nix
index 0f92a079..8cbfc1e7 100644
--- a/hosts/vidhar/dsl.nix
+++ b/hosts/vidhar/dsl.nix
@@ -67,9 +67,9 @@ in {
       };
     };
 
-    systemd.network.networks."dsl" = {
+    systemd.network.networks.${pppInterface} = {
       matchConfig = {
-        Name = "dsl";
+        Name = pppInterface;
       };
       dns = [ "::1" "127.0.0.1" ];
       domains = [ "~." ];
@@ -78,5 +78,135 @@ in {
         DNSSEC = true;
       };
     };
+
+    services.corerad = {
+      enable = true;
+      settings = {
+        interfaces = [
+          { name = pppInterface;
+            monitor = true;
+            verbose = true;
+          }
+          { name = "lan";
+            advertise = true;
+            verbose = true;
+            prefix = [{ prefix = "::/64"; }];
+            route = [{ prefix = "::/0"; }];
+            rdnss = [{ servers = ["::"]; }];
+            dnssl = [{ domain_names = ["yggdrasil"]; }];
+          }
+        ];
+      };
+    };
+    services.ndppd = {
+      enable = true;
+      proxies = {
+        ${pppInterface} = {
+          router = true;
+          rules.lan = {
+            method = "iface";
+            interface = "lan";
+            network = "::/0";
+          };
+        };
+      };
+    };
+    boot.kernel.sysctl = {
+      "net.ipv6.conf.all.forwarding" = true;
+      "net.ipv6.conf.default.forwarding" = true;
+      "net.ipv4.conf.all.forwarding" = true;
+      "net.ipv4.conf.default.forwarding" = true;
+
+      "net.core.rmem_max" = "4194304";
+      "net.core.wmem_max" = "4194304";
+    };
+    systemd.services."pppd-telekom" = {
+      bindsTo = [ "sys-subsystem-net-devices-${pppInterface}.device" ];
+      after = [ "sys-subsystem-net-devices-${pppInterface}.device" ];
+    };
+    systemd.services."dhcpcd-telekom" = {
+      wantedBy = [ "multi-user.target" "network-online.target" "pppd-telekom.service" ];
+      bindsTo = [ "pppd-telekom.service" "sys-subsystem-net-devices-${pppInterface}.device" ];
+      after = [ "pppd-telekom.service" "sys-subsystem-net-devices-${pppInterface}.device" ];
+      wants = [ "network.target" ];
+      before = [ "network-online.target" ];
+
+      path = with pkgs; [ dhcpcd nettools openresolv ];
+      unitConfig.ConditionCapability = "CAP_NET_ADMIN";
+
+      stopIfChanged = false;
+
+      preStart = ''
+        i=0
+
+        while [[ -z "$(${pkgs.iproute2}/bin/ip -6 addr show dev ${pppInterface} scope link)" ]]; do
+          ${pkgs.coreutils}/bin/sleep 0.1
+          i=$((i + 1))
+          if [[ "$i" -ge 10 ]]; then
+            exit 1
+          fi
+        done
+      '';
+
+      serviceConfig = let
+        dhcpcdConf = pkgs.writeText "dhcpcd.conf" ''
+          duid
+          vendorclassid
+          ipv6only
+
+          nooption domain_name_servers, domain_name, domain_search
+          option classless_static_routes
+          option interface_mtu
+
+          option host_name
+          option rapid_commit
+          require dhcp_server_identifier
+          slaac private
+
+          nohook resolv.conf
+          ipv6ra_autoconf
+          iaid 1195061668
+          ipv6rs                 # enable routing solicitation for WAN adapter
+          ia_pd 1 lan/0/64/0     # request a PD and assign it to the LAN
+
+          reboot 0
+
+          waitip 6
+        '';
+      in {
+        Type = "forking";
+        PIDFile = "/run/dhcpcd/pid";
+        RuntimeDirectory = "dhcpcd";
+        ExecStart = "@${pkgs.dhcpcd}/sbin/dhcpcd dhcpcd -q --config ${dhcpcdConf} ${pppInterface}";
+        ExecReload = "${pkgs.dhcpcd}/sbin/dhcpcd --rebind ${pppInterface}";
+        Restart = "always";
+        RestartSec = "5";
+      };
+    };
+    systemd.services.ndppd = {
+      wantedBy = [ "dhcpcd-telekom.service" ];
+      bindsTo = [ "dhcpcd-telekom.service" ];
+      after = [ "dhcpcd-telekom.service" ];
+
+      serviceConfig = {
+        Restart = "always";
+        RestartSec = "5";
+      };
+    };
+    systemd.services.corerad = {
+      wantedBy = [ "dhcpcd-telekom.service" ];
+      bindsTo = [ "dhcpcd-telekom.service" ];
+      after = [ "dhcpcd-telekom.service" ];
+
+      serviceConfig = {
+        Restart = lib.mkForce "always";
+        RestartSec = "5";
+      };
+    };
+    users.users.dhcpcd = {
+      isSystemUser = true;
+      group = "dhcpcd";
+    };
+    users.groups.dhcpcd = {};
   };
 }