From 2f0f17f1fd3fb9fe052155cb81f333a8404b00cb Mon Sep 17 00:00:00 2001
From: Luke Granger-Brown <hg@lukegb.com>
Date: Thu, 4 Apr 2024 22:51:55 +0000
Subject: [PATCH] rexxar: add some shuffles

---
 ops/nixos/rexxar/bgp.nix     |  17 +++--
 ops/nixos/rexxar/default.nix | 127 +++++++++++++++++++++++++++++++++--
 2 files changed, 132 insertions(+), 12 deletions(-)

diff --git a/ops/nixos/rexxar/bgp.nix b/ops/nixos/rexxar/bgp.nix
index fa5177427e..77dadb6f31 100644
--- a/ops/nixos/rexxar/bgp.nix
+++ b/ops/nixos/rexxar/bgp.nix
@@ -16,8 +16,11 @@
       local = {
         routerID = "195.74.55.21";
       };
-      export.v4 = [ ];
-      export.v6 = [ ];
+      export.v4 = [ "92.118.28.0/22" ];
+      export.v6 = [ "2a09:a442:1000::/48" "2a09:a442::/48" ];
+
+      internal.export.v4 = [ "92.118.30.251/32" ];
+      internal.export.v6 = [ "2a09:a442:1000::/48" "2a09:a442::/48" ];
 
       peering = let
         base = [{
@@ -29,13 +32,15 @@
         }];
         link.velox2 = base ++ [{
           local.v4 = "195.74.55.23";
-          local.v6 = "2a03:ee40:8080:9:1::2";
+          local.v6 = "2a03:ee40:8080:9:2::2";
         }];
         link.linx = base ++ [{
           local.v4 = "195.66.224.58";
           local.v6 = "2001:7f8:4::3:22a7:1";
-          remote.pref_src.v4 = "195.74.55.21";
-          remote.pref_src.v6 = "2a03:ee40:8080:9:1::2";
+          #remote.pref_src.v4 = "195.74.55.21";
+          #remote.pref_src.v6 = "2a03:ee40:8080:9:1::2";
+          remote.pref_src.v4 = "92.118.30.251";
+          remote.pref_src.v6 = "2a09:a442:1000::";
         }];
         peer.velox.remote = {
           asn = 3170;
@@ -52,7 +57,7 @@
         }]);
         veloxserv2 = lib.mkMerge (link.velox2 ++ [peer.velox {
           remote.routers = [{
-            enabled = false;
+            enabled = true;
             v4 = "195.74.55.22";
             v6 = "2a03:ee40:8080:9:2::1";
           }];
diff --git a/ops/nixos/rexxar/default.nix b/ops/nixos/rexxar/default.nix
index 66b289198a..b637568d6f 100644
--- a/ops/nixos/rexxar/default.nix
+++ b/ops/nixos/rexxar/default.nix
@@ -77,15 +77,103 @@
     domain = "as205479.net";
     hostId = "b46c2ae9";
     useNetworkd = true;
-  };
-  systemd.network = {
-    networks."10-enp9s0f0" = {
-      matchConfig.Name = "enp9s0f0";
-      networkConfig.VLAN = [ "vl-velox1" "vl-linx" ];
+    firewall = {
+      allowedUDPPorts = [
+        51821 51822 51823
+      ];
     };
+  };
+  systemd.network = let
+    wireguard = { name, listenPort, privateKey, publicKey, endpoint ? null }: {
+      netdevConfig = {
+        Name = name;
+        Kind = "wireguard";
+        Description = "WireGuard tunnel ${name}";
+      };
+      wireguardConfig = {
+        ListenPort = listenPort;
+        PrivateKeyFile = privateKey;
+      };
+      wireguardPeers = [{
+        wireguardPeerConfig = lib.mkMerge [{
+          PublicKey = publicKey;
+          AllowedIPs = [
+            "0.0.0.0/0"
+            "::/0"
+          ];
+        } (lib.mkIf (endpoint != null) {
+          Endpoint = endpoint;
+        })];
+      }];
+    };
+    swannWireguard = args: wireguard (args // {
+      privateKey = config.my.vault.secrets.wg-swann-private.path;
+      publicKey = "XyfovUP6GUwIg15t5UWxicfxooeto/U/7nLs7Zu8HH4=";
+    });
+    cofractalWireguard = args: wireguard (args // {
+      privateKey = config.my.vault.secrets.wg-cofractal-ams01-private.path;
+      publicKey = "qKi6mWIhV2n16LGH16Iug5W+Bx4Fx7eprxCgA/1Ra1g=";
+    });
+  in {
+    netdevs."40-wg-swann-ee" = swannWireguard {
+      name = "wg-swann-ee";
+      listenPort = 51821;
+    };
+    netdevs."40-wg-swann-gnet" = swannWireguard {
+      name = "wg-swann-gnet";
+      listenPort = 51822;
+      endpoint = "185.250.189.20:51822";
+    };
+    netdevs."40-wg-cofractal" = cofractalWireguard {
+      name = "wg-cofractal";
+      listenPort = 51823;
+      endpoint = "[2a09:a446:1337:ffff::10]:51823";
+    };
+
+    networks."40-wg-swann-ee" = {
+      matchConfig.Name = "wg-swann-ee";
+      address = [
+        "92.118.30.3/31"
+        "2a09:a442::2:2/64"
+      ];
+    };
+    networks."40-wg-swann-gnet" = {
+      matchConfig.Name = "wg-swann-gnet";
+      address = [
+        "92.118.30.5/31"
+        "2a09:a442::3:2/64"
+      ];
+    };
+    networks."40-wg-cofractal" = {
+      matchConfig.Name = "wg-cofractal";
+      address = [
+        "169.254.200.0/31"
+      ];
+    };
+
+    networks."10-usb0" = {
+      matchConfig.Name = "usb0";
+      address = [
+        "169.254.0.1/24"
+        # IPMI 169.254.0.17
+      ];
+    };
+    networks."10-enp193s0f0np0" = {
+      matchConfig.Name = "enp193s0f0np0";
+      # Telia
+      address = [
+        "62.115.150.105/31"
+        "2001:2035:0:1f7e::2/126"
+      ];
+    };
+    networks."10-enp193s0f1np1" = {
+      matchConfig.Name = "enp193s0f1np1";
+      networkConfig.VLAN = [ "vl-velox1" ];
+    };
+    # enp9s0f0 - previously velox copper cable 1, now enp193s0f1np1 via 10G
     networks."10-enp9s0f1" = {
       matchConfig.Name = "enp9s0f1";
-      networkConfig.VLAN = [ "vl-velox2" ];
+      networkConfig.VLAN = [ "vl-velox2" "vl-linx" ];
     };
     netdevs."20-vl-velox1" = {
       netdevConfig = {
@@ -173,6 +261,19 @@
         IPv6SendRA = false;
       };
     };
+    networks."60-lo" = {
+      matchConfig.Name = "lo";
+      addresses = [{
+        addressConfig.Address = "127.0.0.1/8";
+        addressConfig.Scope = "host";
+      } {
+        addressConfig.Address = "::1/128";
+      } {
+        addressConfig.Address = "92.118.30.251/32";
+      } {
+        addressConfig.Address = "2a09:a442:1000::/128";
+      }];
+    };
   };
   my.ip.tailscale = "100.97.110.48";
   my.ip.tailscale6 = "fd7a:115c:a1e0::3a01:6e30";
@@ -227,5 +328,19 @@
 
   boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
 
+  my.vault.secrets = let 
+    wireguardSecret = key: {
+      group = "systemd-network";
+      template = ''
+        {{- with secret "kv/apps/wireguard/rexxar" -}}
+        {{- .Data.data.${key} -}}
+        {{- end -}}
+      '';
+    };
+  in {
+    wg-swann-private = wireguardSecret "privateKeyToSwann";
+    wg-cofractal-ams01-private = wireguardSecret "privateKeyToCofractalAms01";
+  };
+
   system.stateVersion = "24.05";
 }