Nushell: Update VPN commands

- Check status when (dis-)connecting with active Wireguard interface
- Add Post VPN Connect and Pre VPN Disconnect Tasks

1 files changed, 42 insertions, 19 deletions

diff --git a/.config/nushell/vpn.nu b/.config/nushell/vpn.nu
index 63ab2e0..cb72845 100644
--- a/.config/nushell/vpn.nu
+++ b/.config/nushell/vpn.nu
@@ -1,16 +1,24 @@
-# Connect to one of the Mullvad VPN Servers via Wireguard and optionally filter by name
+use post-vpn-connect.nu
+use pre-vpn-disconnect.nu
+
+# Connect to one of the Mullvad VPN Servers via Wireguard and optionally filter by name.
 export def connect [
   --filter: string # Filter by VPN server config name, e.g. 'de' to filter German servers
 ] {
     try {
-      let current_status = (status)
-      if ($current_status | is-not-empty) {
-        let connected_server_name = ($current_status | get name | get 0)
-        print $"You are already connected to ($connected_server_name)."
+      let active_interface = (active-interface)
+      if ($active_interface | is-not-empty) {
+        print $"You are already connected to ($active_interface)."
         return
       }
+
       let servers = (sudo ls /etc/wireguard/ | lines | str replace '.conf' '') | where { |name| $name =~ ($filter | default '') }
-      sudo wg-quick up ($servers | select (random int 0..($servers | length)) | get 0)
+      sudo wg-quick up ($servers | select (random int 0..(($servers | length) - 1)) | get 0)
+
+      print "Executing Post-VPN Connect Tasks..."
+      post-vpn-connect 
+      print "Finished Post-VPN Connect Tasks..."
+
     } catch {
       |err|
       print $"Failed to connect to VPN...\n\nError: ($err.msg)"
@@ -18,34 +26,49 @@ export def connect [
 }
 
 # Check if you are connected to a Mullvad VPN server.
-# Return: 
-# If connected: table<name: string, ip: string>
-# If not: nothing
-export def status [] {
+export def test-connection [] {
   try {
     let response = (http get https://am.i.mullvad.net/connected --max-time 5sec)
-    let result = ($response | parse "You are connected to Mullvad (server {name}). Your IP address is {ip}")
-    if ($result | is-not-empty) {
-      return $result
-    }
+    return $response
   } catch {
     |err|
     print $"Failed to get response from status...\n\nError: ($err.msg)"
   }
 }
 
-# Disconnect the active VPN server connection
+# Check if a Wireguard interface is up and running.
+#  If yes: string (name of interface)
+#  If not: nothing
+export def active-interface [] {
+  try {
+    let wg_show_output = (sudo wg show | lines)
+    if ($wg_show_output | is-not-empty) {
+      $wg_show_output | get 0 | parse "interface: {interface}" | get 0 | return $in.interface
+    }
+  } catch {
+    |err|
+    print $"Failed to check active Wireguard interface...\n\nError: ($err.msg)"
+  }
+}
+
+# Disconnect the active VPN server connection.
 export def disconnect [] {
   try {
-    let current_status = (status)
-    if ($current_status | is-empty) {
+    let active_interface = (active-interface)
+    if ($active_interface | is-empty) {
       print "You are not connected to any Mullvad VPN server."
       return
     }
-    let current_server_name = ($current_status | get name | get 0)
-    sudo wg-quick down $current_server_name
+
+    print "Executing Pre-VPN Disconnect Tasks..."
+    pre-vpn-disconnect
+    print "Finished Pre-VPN Disconnect Tasks..."
+
+    sudo wg-quick down $active_interface
   } catch {
     |err| 
     print $"Failed to disconnect active VPN connection...\n\n Error: ($err.msg)"
   }
 }
+
+