From bf297cd5d7daeefd60027f20d0490fd9e472e6d3 Mon Sep 17 00:00:00 2001
From: Astro <astro@spaceboyz.net>
Date: Thu, 25 Feb 2021 02:28:43 +0100
Subject: [PATCH] nix: add subnet

---
 nix/subnet.nix | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 nix/subnet.nix

diff --git a/nix/subnet.nix b/nix/subnet.nix
new file mode 100644
index 000000000..4a4ea60
--- /dev/null
+++ b/nix/subnet.nix
@@ -0,0 +1,20 @@
+{ pkgs ? import <nixpkgs> {}
+}:
+
+{
+  # List of all IP addresses in a subnet
+  range = subnet:
+    import (
+      pkgs.runCommandLocal "subnet-${subnet}.nix" {
+        nativeBuildInputs = [ pkgs.nmap ];
+      } ''
+        (
+          echo "["
+          for i in $(nmap -sL ${pkgs.lib.optionalString (builtins.match ".*:.*" subnet != null) "-6"} ${subnet} -n -oG - | grep Status: | cut -d " " -f 2); do
+            echo \"$i\"
+          done
+          echo "]"
+        ) > $out
+      ''
+    );
+}