Implement VER command

Fixes #22

nut-client/examples/async.rs

@@ -25,6 +25,11 @@ async fn main() -> nut_client::Result<()> {
 
     let mut conn = Connection::new(&config).await?;
 
+    // Get server information
+    println!("NUT server:");
+    println!("\tVersion: {}", conn.get_server_version().await?);
+    println!("\tNetwork Version: {}", conn.get_network_version().await?);
+
     // Print a list of all UPS devices
     println!("Connected UPS devices:");
     for (name, description) in conn.list_ups().await? {

nut-client/examples/blocking.rs

@@ -24,6 +24,11 @@ fn main() -> nut_client::Result<()> {
 
     let mut conn = Connection::new(&config)?;
 
+    // Get server information
+    println!("NUT server:");
+    println!("\tVersion: {}", conn.get_server_version()?);
+    println!("\tNetwork Version: {}", conn.get_network_version()?);
+
     // Print a list of all UPS devices
     println!("Connected UPS devices:");
     for (name, description) in conn.list_ups()? {

nut-client/src/cmd.rs

@@ -15,6 +15,8 @@ pub enum Command<'a> {
     StartTLS,
     /// Queries the network version.
     NetworkVersion,
+    /// Queries the server version
+    Version,
 }
 
 impl<'a> Command<'a> {
@@ -27,6 +29,7 @@ impl<'a> Command<'a> {
             Self::List(_) => "LIST",
             Self::StartTLS => "STARTTLS",
             Self::NetworkVersion => "NETVER",
+            Self::Version => "VER",
         }
     }
 
@@ -480,6 +483,14 @@ implement_simple_commands! {
             { |row: String| Ok(row) },
         )
     }
+
+    /// Queries the server NUT version.
+    pub fn get_server_version() -> String {
+        (
+            { Command::Version },
+            { |row: String| Ok(row) },
+        )
+    }
 }
 
 implement_action_commands! {