Show guidelines on UI on how to setup network hook

virtweb_backend/src/nat/nat_hook.rs

@@ -0,0 +1,29 @@
+use crate::app_config::AppConfig;
+use crate::constants;
+use std::path::Path;
+
+/// Check out whether NAT hook has been installed or not
+pub fn is_installed() -> anyhow::Result<bool> {
+    let hook_file = Path::new(constants::NAT_HOOK_PATH);
+
+    if !hook_file.exists() {
+        return Ok(false);
+    }
+
+    let exe = std::env::current_exe()?;
+    let hook_content = std::fs::read_to_string(hook_file)?;
+
+    Ok(hook_content.contains(exe.to_string_lossy().as_ref()))
+}
+
+/// Get nat hook expected content
+pub fn hook_content() -> anyhow::Result<String> {
+    let exe = std::env::current_exe()?;
+
+    Ok(format!(
+        "#!/bin/bash\n\
+    {} --storage {} --network-name \"$1\" --operation \"$2\" --sub-operation \"$3\"",
+        exe.to_string_lossy(),
+        AppConfig::get().storage
+    ))
+}