From 5bfc0b0c7dcb0c8da45661f69d306305efbdc8e7 Mon Sep 17 00:00:00 2001
From: "Casper V. Kristensen" <casper@vkristensen.dk>
Date: Thu, 9 May 2024 17:24:46 +0200
Subject: [PATCH] sigma: samba smb

---
 hosts/sigma/default.nix |  1 +
 hosts/sigma/deluge.nix  |  1 -
 hosts/sigma/network.nix |  6 ++++
 hosts/sigma/samba.nix   | 61 +++++++++++++++++++++++++++++++++++++++++
 4 files changed, 68 insertions(+), 1 deletion(-)
 create mode 100644 hosts/sigma/samba.nix

diff --git a/hosts/sigma/default.nix b/hosts/sigma/default.nix
index 158921f..eafee13 100644
--- a/hosts/sigma/default.nix
+++ b/hosts/sigma/default.nix
@@ -13,6 +13,7 @@
     ./mail.nix
     ./memos.nix
     ./network.nix
+    ./samba.nix
     ./sonarr.nix
   ];
 
diff --git a/hosts/sigma/deluge.nix b/hosts/sigma/deluge.nix
index c766f21..8680afb 100644
--- a/hosts/sigma/deluge.nix
+++ b/hosts/sigma/deluge.nix
@@ -57,7 +57,6 @@
   # Add caspervk user to the 'torrent' group to allow viewing downloads
   users.groups.torrent.members = ["caspervk"];
 
-
   environment.persistence."/nix/persist" = {
     directories = [
       # Deluge data directory. This is *NOT* where the downloads are saved
diff --git a/hosts/sigma/network.nix b/hosts/sigma/network.nix
index c200e7c..5222141 100644
--- a/hosts/sigma/network.nix
+++ b/hosts/sigma/network.nix
@@ -136,10 +136,16 @@
     allowedUDPPortRanges = lib.mkForce [];
     interfaces = {
       "enp5s0" = {
+        allowedUDPPorts = [
+          139 # Samba
+          445 # Samba
+        ];
         allowedTCPPorts = [
+          139 # Samba
           22 # SSH
           25 # Mail SMTP
           443 # Caddy
+          445 # Samba
           465 # Mail ESMTP
           80 # Caddy
           993 # Mail IMAPS
diff --git a/hosts/sigma/samba.nix b/hosts/sigma/samba.nix
new file mode 100644
index 0000000..ab61ca9
--- /dev/null
+++ b/hosts/sigma/samba.nix
@@ -0,0 +1,61 @@
+{
+  config,
+  secrets,
+  ...
+}: {
+  # Samba provides file and print services for various Microsoft Windows
+  # clients.
+  # https://wiki.nixos.org/wiki/Samba
+  #
+  # The setup can be tested by:
+  # > smbclient -L \\\\192.168.0.10
+  # > smbclient \\\\192.168.0.21\\downloads -U caspervk
+  #
+  # Running .exe's and installing programs through a network drive doesn't
+  # always work on Windows. The following tricks Windows by "mounting" the
+  # network drive to a local drive letter (or something like that, who knows).
+  # In cmd as administrator:
+  # > net use \\192.168.0.10\downloads
+  # > SUBST M: \\192.168.0.10\downloads
+  # > dir M:
+  # > M:\Programs\install.exe
+  services.samba = {
+    enable = true;
+    # Disable discovery: don't reply to NetBIOS over IP name service requests
+    # or participate in the browsing protocols which make up the Windows
+    # “Network Neighborhood” view.
+    enableNmbd = false;
+    # Disable Samba’s winbindd, which provides a number of services to the Name
+    # Service Switch capability found in most modern C libraries, to arbitrary
+    # applications via PAM and ntlm_auth and to Samba itself.
+    enableWinbindd = false;
+    # https://www.samba.org/samba/docs/current/man-html/smb.conf.5.html
+    extraConfig = ''
+      # Only allow local access. This should also be enforced by the firewall.
+      hosts deny ALL
+      hosts allow = 192.168.0.0/16 127.0.0.1 localhost
+      # Use user and group information from TDB database.
+      # The age-encrypted database is created by setting in the config
+      # > passdb backend = passdb backend = tdbsam:/tmp/samba-password-database
+      # and running
+      # > sudo pdbedit --create --user=caspervk
+      passdb backend = tdbsam:${config.age.secrets.samba-password-database.path}
+      # Allow Windows clients to run .exe's
+      acl allow execute always = True
+    '';
+    shares = {
+      downloads = {
+        path = "/srv/torrents/downloads";
+        # Use the 'torrent' group for access for all users connecting
+        "force group" = "torrent";
+      };
+    };
+  };
+
+  age.secrets.samba-password-database = {
+    file = "${secrets}/secrets/samba-password-database.age";
+    mode = "400";
+    owner = "root";
+    group = "root";
+  };
+}