From 37b2ba86639113d82f64424ca5e4d0b60c51237e Mon Sep 17 00:00:00 2001
From: "Gustavo \"Guz\" L. de Mello" <contact.guz013@gmail.com>
Date: Sun, 28 Jan 2024 21:32:46 -0300
Subject: [PATCH] feat: network homelab module

---
 hosts/homex/configuration.nix       |  8 ++++-
 hosts/homex/network.nix             | 14 --------
 modules/nixos/homelab/default.nix   |  8 +++--
 modules/nixos/homelab/network.nix   | 56 +++++++++++++++++++++++++++++
 modules/nixos/homelab/tailscale.nix |  3 ++
 5 files changed, 71 insertions(+), 18 deletions(-)
 create mode 100644 modules/nixos/homelab/network.nix

diff --git a/hosts/homex/configuration.nix b/hosts/homex/configuration.nix
index 6c38bef..e5ca509 100644
--- a/hosts/homex/configuration.nix
+++ b/hosts/homex/configuration.nix
@@ -10,7 +10,6 @@
     ../../modules/nixos/config/host.nix
     ../../modules/nixos/homelab
     ./hardware-configuration.nix
-    ./network.nix
     ./secrets.nix
     ./users
   ];
@@ -18,11 +17,18 @@
   homelab = {
     enable = true;
     flakeDir = "/home/guz/.nix#homex";
+    name = "homex";
 
     domain = "guz.local";
+
     ip = "100.66.139.89";
     localIp = "192.168.1.10";
 
+    network = {
+      enable = true;
+      interface = "eno1";
+    };
+
     tailscale = {
       enable = true;
       mode = "both";
diff --git a/hosts/homex/network.nix b/hosts/homex/network.nix
index 57b1e0e..61221d5 100644
--- a/hosts/homex/network.nix
+++ b/hosts/homex/network.nix
@@ -4,20 +4,6 @@
   imports = [ ];
   config = {
     host.networking.hostName = "homex";
-    networking = {
-      dhcpcd.enable = true;
-      interfaces.eno1.ipv4.addresses = [{
-        address = "192.168.1.10";
-        prefixLength = 28;
-      }];
-      defaultGateway = "192.168.1.1";
-      nameservers = [ "100.100.100.100" "1.1.1.1" "8.8.8.8" ];
-    };
-
-    boot.kernel.sysctl."net.ipv4.ip_forward" = 1;
-    boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = 1;
-
-    services.openssh.enable = true;
   };
 }
 
diff --git a/modules/nixos/homelab/default.nix b/modules/nixos/homelab/default.nix
index e35326b..19adc6e 100644
--- a/modules/nixos/homelab/default.nix
+++ b/modules/nixos/homelab/default.nix
@@ -26,6 +26,7 @@ in
     ./adguard.nix
     ./caddy.nix
     ./forgejo.nix
+    ./network.nix
     ./tailscale.nix
   ];
   options.homelab = with lib; with lib.types; {
@@ -42,12 +43,13 @@ in
       type = either str path;
       default = "homelab.local";
     };
-    ip = mkOption {
-      type = str;
-    };
     localIp = mkOption {
       type = str;
     };
+    ip = mkOption {
+      type = str;
+      default = cfg.localIp;
+    };
     handleDomains = mkOption {
       type = bool;
       default = true;
diff --git a/modules/nixos/homelab/network.nix b/modules/nixos/homelab/network.nix
new file mode 100644
index 0000000..0948a7c
--- /dev/null
+++ b/modules/nixos/homelab/network.nix
@@ -0,0 +1,56 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.homelab.network;
+in
+{
+  imports = [ ];
+  options.homelab.network = with lib; with lib.types; {
+    enable = mkOption {
+      type = bool;
+      default = true;
+    };
+    interface = mkOption {
+      type = str;
+    };
+    localIp = mkOption {
+      type = str;
+      default = config.homelab.localIp;
+    };
+    defaultGateway = mkOption {
+      type = str;
+      default = "192.168.1.1";
+    };
+    nameservers = mkOption {
+      type = listOf str;
+      default = [ "1.1.1.1" "8.8.8.8" ];
+    };
+    portForwarding = mkOption {
+      type = bool;
+      default = false;
+    };
+    openssh = mkOption {
+      type = bool;
+      default = true;
+    };
+    settings = { };
+  };
+  config = lib.mkIf cfg.enable {
+    networking = {
+      dhcpcd.enable = true;
+      interfaces."${cfg.interface}".ipv4.addresses = [{
+        address = cfg.localIp;
+        prefixLength = 28;
+      }];
+      defaultGateway = cfg.defaultGateway;
+      nameservers = [
+        (if config.homelab.tailscale.enable then "100.100.100.100" else null)
+      ] ++ cfg.nameservers;
+    };
+
+    boot.kernel.sysctl."net.ipv4.ip_forward" = if cfg.portForwarding then 1 else 0;
+    boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = if cfg.portForwarding then 1 else 0;
+
+    services.openssh.enable = cfg.openssh;
+  };
+}
diff --git a/modules/nixos/homelab/tailscale.nix b/modules/nixos/homelab/tailscale.nix
index b03ff08..9bf1b53 100644
--- a/modules/nixos/homelab/tailscale.nix
+++ b/modules/nixos/homelab/tailscale.nix
@@ -28,6 +28,9 @@ in
       enable = true;
       useRoutingFeatures = cfg.mode;
     };
+
+    homelab.network = lib.mkIf cfg.exitNode { portForwarding = lib.mkDefault true; };
+
   };
 }