From e1ae986cf66c396f6d5970735abd2042c99ead1f Mon Sep 17 00:00:00 2001
From: Daniel Barlow <dan@telent.net>
Date: Tue, 23 Jul 2024 09:30:25 +0100
Subject: [PATCH] convert l2tp example to use gateway profile

---
 examples/l2tp.nix | 151 +++++++++++++++++++++++++++-------------------
 1 file changed, 88 insertions(+), 63 deletions(-)

diff --git a/examples/l2tp.nix b/examples/l2tp.nix
index 0b45b2e..f7b66ca 100644
--- a/examples/l2tp.nix
+++ b/examples/l2tp.nix
@@ -30,6 +30,11 @@
   inherit (pkgs.pseudofile) dir symlink;
   inherit (pkgs) serviceFns;
   svc = config.system.service;
+  wirelessConfig = {
+    country_code = "GB";
+    inherit (rsecrets) wpa_passphrase;
+    wmm_enabled = 1;
+  };
 in rec {
   boot = {
     tftp = {
@@ -41,13 +46,14 @@ in rec {
   imports = [
     ../modules/wwan
     ../modules/network
-    ../modules/vlan
+    # ../modules/vlan
     ../modules/ssh
     ../modules/usb.nix
-    ../modules/watchdog
-    ../modules/mount
+    # ../modules/watchdog
+    # ../modules/mount
     ../modules/ppp
     ../modules/round-robin
+    ../modules/profiles/gateway.nix
   ];
   hostname = "thing";
 
@@ -58,59 +64,81 @@ in rec {
     authType = "chap";
   };
 
-  services.wan =
-    let
-      pppoe = svc.pppoe.build {
-        interface = config.hardware.networkInterfaces.wan;
-        debug = true;
-        username = rsecrets.l2tp.name;
-        password = rsecrets.l2tp.password;
+  profile.gateway = {
+    lan = {
+      interfaces =  with config.hardware.networkInterfaces;
+        [
+          # EDIT: these are the interfaces exposed by the gl.inet gl-ar750:
+          # if your device has more or differently named lan interfaces,
+          # specify them here
+          wlan wlan5
+          lan
+        ];
+      inherit (rsecrets.lan) prefix;
+      address = {
+        family = "inet"; address ="${rsecrets.lan.prefix}.1"; prefixLength = 24;
       };
-
-      l2tp =
-        let
-          check-address = oneshot rec {
-            name = "check-lns-address";
-            up = "grep -Fx ${lns.address} $(output_path ${services.lns-address} addresses)";
-            dependencies = [ services.lns-address ];
-          };
-          route = svc.network.route.build {
-            via = "$(output ${services.dhcpc} router)";
-            target = lns.address;
-            dependencies = [services.dhcpc check-address];
-          };
-        in svc.l2tp.build {
-          lns = lns.address;
-          ppp-options = [
-            "debug" "+ipv6" "noauth"
-            "name" rsecrets.l2tp.name
-            "password" rsecrets.l2tp.password
-          ];
-          dependencies = [config.services.lns-address route check-address];
+      dhcp = {
+        start = 10;
+        end = 240;
+        hosts = { } // lib.optionalAttrs (builtins.pathExists ./static-leases.nix) (import ./static-leases.nix);
+        localDomain = "lan";
+      };
+    };
+    wan = {
+      interface = let
+        pppoe = svc.pppoe.build {
+          interface = config.hardware.networkInterfaces.wan;
+          debug = true;
+          username = rsecrets.l2tp.name;
+          password = rsecrets.l2tp.password;
         };
-    in svc.round-robin.build {
-      name = "wan";
-      services = [ l2tp pppoe ];
+
+        l2tp =
+          let
+            check-address = oneshot rec {
+              name = "check-lns-address";
+              up = "grep -Fx ${lns.address} $(output_path ${services.lns-address} addresses)";
+              dependencies = [ services.lns-address ];
+            };
+            route = svc.network.route.build {
+              via = "$(output ${services.bootstrap-dhcpc} router)";
+              target = lns.address;
+              dependencies = [services.bootstrap-dhcpc check-address];
+            };
+          in svc.l2tp.build {
+            lns = lns.address;
+            ppp-options = [
+              "debug" "+ipv6" "noauth"
+              "name" rsecrets.l2tp.name
+              "password" rsecrets.l2tp.password
+            ];
+            dependencies = [config.services.lns-address route check-address];
+          };
+      in svc.round-robin.build {
+        name = "wan";
+        services = [ l2tp pppoe ];
+      };
+      dhcp6.enable = true;
     };
 
-  services.sshd = svc.ssh.build { };
-
-  services.resolvconf = oneshot rec {
-    dependencies = [ services.wan ];
-    name = "resolvconf";
-    up = ''
-      . ${serviceFns}
-       ( in_outputs ${name}
-        for i in ns1 ns2 ; do
-          ns=$(output ${services.wan} $i)
-          echo "nameserver $ns" >> resolv.conf
-        done
-       )
-    '';
-  };
-  filesystem = dir {
-    etc = dir {
-      "resolv.conf" = symlink "${services.resolvconf}/.outputs/resolv.conf";
+    wireless.networks = {
+      "${rsecrets.ssid}" = {
+        interface = config.hardware.networkInterfaces.wlan;
+        hw_mode = "g";
+        channel = "6";
+        ieee80211n = 1;
+      } // wirelessConfig;
+      "${rsecrets.ssid}5" = rec {
+        interface = config.hardware.networkInterfaces.wlan5;
+        hw_mode = "a";
+        channel = 36;
+        ht_capab = "[HT40+]";
+        vht_oper_chwidth = 1;
+        vht_oper_centr_freq_seg0_idx = channel + 6;
+        ieee80211n = 1;
+        ieee80211ac = 1;
+      } // wirelessConfig;
     };
   };
 
@@ -119,6 +147,8 @@ in rec {
     dependencies = [ config.services.hostname ];
   };
 
+  services.sshd = svc.ssh.build { };
+
   services.lns-address = let
     ns = "$(output_word ${services.bootstrap-dhcpc} dns 1)";
     route-to-bootstrap-nameserver = svc.network.route.build {
@@ -137,18 +167,13 @@ in rec {
     '';
   };
 
-  services.defaultroute4 = svc.network.route.build {
-    via = "$(output ${services.wan} peer-address)";
-    target = "default";
-    dependencies = [services.wan];
-  };
+  # services.ntp = svc.ntp.build {
+  #   pools = { "pool.ntp.org" = ["iburst"]; };
+  #   makestep = { threshold = 1.0; limit = 3; };
+  #   dependencies = with config.services; [ defaultroute4 defaultroute6 ];
+  # };
 
-#  defaultProfile.packages = [ pkgs.go-l2tp ];
-
-  users.root = {
-    passwd = lib.mkForce secrets.root.passwd;
-    openssh.authorizedKeys.keys = secrets.root.keys;
-  };
+  users.root = rsecrets.root;
 
   programs.busybox.options = {
     FEATURE_FANCY_TAIL = "y";