Rewrote the configuration options to make Diplonat modular: IGD and Firewall modules will only be enabled if correponding `DIPLONAT_*_ENABLE` is set. (Breaking changes!)

Also rearranged imports throughout the project, because I couldn't resist, sorry.

docker-compose.yml

@@ -5,10 +5,13 @@ services:
     image: darkgallium/amd64_diplonat:v2
     network_mode: host # required by UPNP/IGD
     environment:
-      DIPLONAT_PRIVATE_IP: 192.168.0.18
-      DIPLONAT_REFRESH_TIME: 60
-      DIPLONAT_EXPIRATION_TIME: 300
       DIPLONAT_CONSUL_NODE_NAME: lheureduthe
+      DIPLONAT_FIREWALL_ENABLE: true
+      DIPLONAT_FIREWALL_REFRESH_TIME: 60
+      DIPLONAT_IGD_ENABLE: true
+      DIPLONAT_IGD_PRIVATE_IP: 192.168.0.18
+      DIPLONAT_IGD_EXPIRATION_TIME: 300
+      DIPLONAT_IGD_REFRESH_TIME: 60
       RUST_LOG: debug
 
 

src/config/mod.rs

@@ -3,7 +3,7 @@ mod options;
 mod options_test;
 mod runtime;
 
-pub use options::{ConfigOpts, ConfigOptsAcme, ConfigOptsBase, ConfigOptsConsul};
+pub use options::{ConfigOpts, ConfigOptsConsul, ConfigOptsAcme, ConfigOptsFirewall, ConfigOptsIgd};
 pub use runtime::{RuntimeConfig, RuntimeConfigAcme, RuntimeConfigConsul, RuntimeConfigFirewall, RuntimeConfigIgd};
 
 pub const EXPIRATION_TIME: u16 = 300;

src/config/options.rs

@@ -8,21 +8,27 @@ use crate::config::RuntimeConfig;
 // This file parses the options that can be declared in the environment.
 // runtime.rs applies business logic and builds RuntimeConfig structs.
 
-/// Base configuration options
+// - Note for the future -
+// There is no *need* to have a 'DIPLONAT_XXX_*' prefix for all config options.
+// If some config options are shared by several modules, a ConfigOptsBase could
+// contain them, and parse the 'DIPLONAT_*' prefix directly.
+// Only in runtime.rs would these options find their proper location in each 
+// module's struct.
+
+
+/// Consul configuration options
 #[derive(Clone, Default, Deserialize)]
-pub struct ConfigOptsBase {
-	/// This node's private IP address [default: None]
-	pub private_ip: Option<String>,
-	/// Expiration time for IGD rules [default: 60]
-	pub expiration_time: Option<u16>,
-	/// Refresh time for IGD and Firewall rules [default: 300]
-	pub refresh_time: Option<u16>,
+pub struct ConfigOptsConsul {
+	/// Consul's node name [default: None]
+	pub node_name: Option<String>,
+	/// Consul's REST URL [default: "http://127.0.0.1:8500"]
+	pub url: Option<String>,
 }
 
 /// ACME configuration options
 #[derive(Clone, Default, Deserialize)]
 pub struct ConfigOptsAcme {
-	/// Whether ACME is enabled [default: false]
+	/// Whether the ACME module is enabled [default: false]
 	#[serde(default)]
 	pub enable: bool,
 
@@ -30,32 +36,52 @@ pub struct ConfigOptsAcme {
 	pub email: Option<String>,
 }
 
-/// Consul configuration options
+/// Firewall configuration options
 #[derive(Clone, Default, Deserialize)]
-pub struct ConfigOptsConsul {
-	/// Consul's node name [default: None]
-	pub node_name: Option<String>,
-	/// Consul's REST URL [default: "http://127.0.0.1:8500"]
-	pub url: Option<String>,
+pub struct ConfigOptsFirewall {
+	/// Whether the firewall module is enabled [default: false]
+	#[serde(default)]
+	pub enable: bool,
+
+	/// Refresh time for firewall rules [default: 300]
+	pub refresh_time: Option<u16>,
+}
+
+/// IGD configuration options
+#[derive(Clone, Default, Deserialize)]
+pub struct ConfigOptsIgd {
+	/// Whether the IGD module is enabled [default: false]
+	#[serde(default)]
+	pub enable: bool,
+
+	/// This node's private IP address [default: None]
+	pub private_ip: Option<String>,
+	/// Expiration time for IGD rules [default: 60]
+	pub expiration_time: Option<u16>,
+	/// Refresh time for IGD rules [default: 300]
+	pub refresh_time: Option<u16>,
 }
 
 /// Model of all potential configuration options
 pub struct ConfigOpts {
-	pub base: ConfigOptsBase,
-	pub acme: ConfigOptsAcme,
 	pub consul: ConfigOptsConsul,
+	pub acme: ConfigOptsAcme,
+	pub firewall: ConfigOptsFirewall,
+	pub igd: ConfigOptsIgd,
 }
 
 impl ConfigOpts {
 	pub fn from_env() -> Result<RuntimeConfig> {
-		let base: ConfigOptsBase = envy::prefixed("DIPLONAT_").from_env()?;
 		let consul: ConfigOptsConsul = envy::prefixed("DIPLONAT_CONSUL_").from_env()?;
 		let acme: ConfigOptsAcme = envy::prefixed("DIPLONAT_ACME_").from_env()?;
+		let firewall: ConfigOptsFirewall = envy::prefixed("DIPLONAT_FIREWALL_").from_env()?;
+		let igd: ConfigOptsIgd = envy::prefixed("DIPLONAT_IGD_").from_env()?;
 
 		RuntimeConfig::new(Self {
-			base: base,
-			consul: consul,
-			acme: acme,
+			consul,
+			acme,
+			firewall,
+			igd,
 		})
 	}
 
@@ -63,14 +89,16 @@ impl ConfigOpts {
 	#[allow(dead_code)]
 	pub fn from_iter<Iter: Clone>(iter: Iter) -> Result<RuntimeConfig>
 	where Iter: IntoIterator<Item = (String, String)> {
-		let base: ConfigOptsBase = envy::prefixed("DIPLONAT_").from_iter(iter.clone())?;
 		let consul: ConfigOptsConsul = envy::prefixed("DIPLONAT_CONSUL_").from_iter(iter.clone())?;
 		let acme: ConfigOptsAcme = envy::prefixed("DIPLONAT_ACME_").from_iter(iter.clone())?;
+		let firewall: ConfigOptsFirewall = envy::prefixed("DIPLONAT_FIREWALL_").from_iter(iter.clone())?;
+		let igd: ConfigOptsIgd = envy::prefixed("DIPLONAT_IGD_").from_iter(iter.clone())?;
 
 		RuntimeConfig::new(Self {
-			base: base,
-			consul: consul,
-			acme: acme,
+			consul,
+			acme,
+			firewall,
+			igd,
 		})
 	}
 }

src/config/options_test.rs

@@ -11,35 +11,44 @@ use crate::config::*;
 
 fn minimal_valid_options() -> HashMap<String, String> {
 	let mut opts = HashMap::new();
-	opts.insert("DIPLONAT_PRIVATE_IP".to_string(), "172.123.43.555".to_string());
     opts.insert("DIPLONAT_CONSUL_NODE_NAME".to_string(), "consul_node".to_string());
     opts
 }
 
 fn all_valid_options() -> HashMap<String, String> {
 	let mut opts = minimal_valid_options();
-	opts.insert("DIPLONAT_EXPIRATION_TIME".to_string(), "30".to_string());
-	opts.insert("DIPLONAT_REFRESH_TIME".to_string(), "10".to_string());
     opts.insert("DIPLONAT_CONSUL_URL".to_string(), "http://127.0.0.1:9999".to_string());
 	opts.insert("DIPLONAT_ACME_ENABLE".to_string(), "true".to_string());
 	opts.insert("DIPLONAT_ACME_EMAIL".to_string(), "bozo@bozo.net".to_string());
+	opts.insert("DIPLONAT_FIREWALL_ENABLE".to_string(), "true".to_string());
+	opts.insert("DIPLONAT_FIREWALL_REFRESH_TIME".to_string(), "20".to_string());
+	opts.insert("DIPLONAT_IGD_ENABLE".to_string(), "true".to_string());
+	opts.insert("DIPLONAT_IGD_PRIVATE_IP".to_string(), "172.123.43.555".to_string());
+	opts.insert("DIPLONAT_IGD_EXPIRATION_TIME".to_string(), "60".to_string());
+	opts.insert("DIPLONAT_IGD_REFRESH_TIME".to_string(), "10".to_string());
     opts
 }
 
+// #[test]
+// #[should_panic]
+// fn err_empty_env() {
+// 	 std::env::remove_var("DIPLONAT_CONSUL_NODE_NAME");
+// 	 ConfigOpts::from_env().unwrap();
+// }
+
 #[test]
 #[should_panic]
 fn err_empty_env() {
-	std::env::remove_var("DIPLONAT_PRIVATE_IP");
 	std::env::remove_var("DIPLONAT_CONSUL_NODE_NAME");
-	ConfigOpts::from_env().unwrap();
+	let opts: HashMap<String, String> = HashMap::new();
+	ConfigOpts::from_iter(opts).unwrap();
 }
 
 #[test]
-fn ok_from_iter_minimal_valid_options() {
+fn ok_minimal_valid_options() {
 	let opts = minimal_valid_options();
 	let rt_config = ConfigOpts::from_iter(opts.clone()).unwrap();
 
-	assert!(rt_config.acme.is_none());
 	assert_eq!(
 		&rt_config.consul.node_name, 
 		opts.get(&"DIPLONAT_CONSUL_NODE_NAME".to_string()).unwrap()
@@ -48,7 +57,10 @@ fn ok_from_iter_minimal_valid_options() {
 		rt_config.consul.url, 
 		CONSUL_URL.to_string()
 	);
-	assert_eq!(
+	assert!(rt_config.acme.is_none());
+	assert!(rt_config.firewall.is_none());
+	assert!(rt_config.igd.is_none());
+	/*assert_eq!(
 		rt_config.firewall.refresh_time,
 		Duration::from_secs(REFRESH_TIME.into())
 	);
@@ -63,36 +75,37 @@ fn ok_from_iter_minimal_valid_options() {
 	assert_eq!(
 		rt_config.igd.refresh_time,
 		Duration::from_secs(REFRESH_TIME.into())
-	);
+	);*/
 }
 
 #[test]
 #[should_panic]
-fn err_from_iter_invalid_refresh_time() {
+fn err_invalid_igd_options() {
 	let mut opts = minimal_valid_options();
-	opts.insert("DIPLONAT_EXPIRATION_TIME".to_string(), "60".to_string());
-	opts.insert("DIPLONAT_REFRESH_TIME".to_string(), "60".to_string());
+	opts.insert("DIPLONAT_IGD_ENABLE".to_string(), "true".to_string());
+	opts.insert("DIPLONAT_IGD_EXPIRATION_TIME".to_string(), "60".to_string());
+	opts.insert("DIPLONAT_IGD_REFRESH_TIME".to_string(), "60".to_string());
 	ConfigOpts::from_iter(opts).unwrap();
 }
 
 #[test]
-fn ok_from_iter_all_valid_options() {
+fn ok_all_valid_options() {
 	let opts = all_valid_options();
 	let rt_config = ConfigOpts::from_iter(opts.clone()).unwrap();
 
-	let expiration_time = Duration::from_secs(
-		opts.get(&"DIPLONAT_EXPIRATION_TIME".to_string()).unwrap()
+	let firewall_refresh_time = Duration::from_secs(
+		opts.get(&"DIPLONAT_FIREWALL_REFRESH_TIME".to_string()).unwrap()
 			.parse::<u64>().unwrap()
 			.into());
-	let refresh_time = Duration::from_secs(
-		opts.get(&"DIPLONAT_REFRESH_TIME".to_string()).unwrap()
+	let igd_expiration_time = Duration::from_secs(
+		opts.get(&"DIPLONAT_IGD_EXPIRATION_TIME".to_string()).unwrap()
+			.parse::<u64>().unwrap()
+			.into());
+	let igd_refresh_time = Duration::from_secs(
+		opts.get(&"DIPLONAT_IGD_REFRESH_TIME".to_string()).unwrap()
 			.parse::<u64>().unwrap()
 			.into());
 
-	assert!(rt_config.acme.is_some());
-	assert_eq!(
-		&rt_config.acme.unwrap().email,
-		opts.get(&"DIPLONAT_ACME_EMAIL".to_string()).unwrap());
 	assert_eq!(
 		&rt_config.consul.node_name, 
 		opts.get(&"DIPLONAT_CONSUL_NODE_NAME".to_string()).unwrap()
@@ -101,20 +114,32 @@ fn ok_from_iter_all_valid_options() {
 		&rt_config.consul.url, 
 		opts.get(&"DIPLONAT_CONSUL_URL".to_string()).unwrap()
 	);
+
+	assert!(rt_config.acme.is_some());
+	let acme = rt_config.acme.unwrap();
 	assert_eq!(
-		rt_config.firewall.refresh_time,
-		refresh_time
+		&acme.email,
+		opts.get(&"DIPLONAT_ACME_EMAIL".to_string()).unwrap());
+
+	assert!(rt_config.firewall.is_some());
+	let firewall = rt_config.firewall.unwrap();
+	assert_eq!(
+		firewall.refresh_time,
+		firewall_refresh_time
 	);
+
+	assert!(rt_config.igd.is_some());
+	let igd = rt_config.igd.unwrap();
 	assert_eq!(
-		&rt_config.igd.private_ip,
-		opts.get(&"DIPLONAT_PRIVATE_IP".to_string()).unwrap()
+		&igd.private_ip,
+		opts.get(&"DIPLONAT_IGD_PRIVATE_IP".to_string()).unwrap()
 	);
 	assert_eq!(
-		rt_config.igd.expiration_time,
-		expiration_time
+		igd.expiration_time,
+		igd_expiration_time
 	);
 	assert_eq!(
-		rt_config.igd.refresh_time,
-		refresh_time
+		igd.refresh_time,
+		igd_refresh_time
 	);
 }

src/config/runtime.rs

@@ -2,17 +2,14 @@ use std::time::Duration;
 
 use anyhow::{Result, anyhow};
 
-use crate::config::{ConfigOpts, ConfigOptsAcme, ConfigOptsBase, ConfigOptsConsul};
+use crate::config::{ConfigOpts, ConfigOptsConsul, ConfigOptsAcme, ConfigOptsFirewall, ConfigOptsIgd};
 
 // This code is inspired by the Trunk crate (https://github.com/thedodd/trunk)
 
 // In this file, we take ConfigOpts and transform them into ready-to-use RuntimeConfig.
 // We apply default values and business logic.
 
-#[derive(Debug)]
-pub struct RuntimeConfigAcme {
-	pub email: String,
-}
+// Consul config is mandatory, all the others are optional.
 
 #[derive(Debug)]
 pub struct RuntimeConfigConsul {
@@ -20,6 +17,11 @@ pub struct RuntimeConfigConsul {
 	pub url: String,
 }
 
+#[derive(Debug)]
+pub struct RuntimeConfigAcme {
+	pub email: String,
+}
+
 #[derive(Debug)]
 pub struct RuntimeConfigFirewall {
 	pub refresh_time: Duration,
@@ -34,18 +36,18 @@ pub struct RuntimeConfigIgd {
 
 #[derive(Debug)]
 pub struct RuntimeConfig {
-	pub acme: Option<RuntimeConfigAcme>,
 	pub consul: RuntimeConfigConsul,
-	pub firewall: RuntimeConfigFirewall,
-	pub igd: RuntimeConfigIgd,
+	pub acme: Option<RuntimeConfigAcme>,
+	pub firewall: Option<RuntimeConfigFirewall>,
+	pub igd: Option<RuntimeConfigIgd>,
 }
 
 impl RuntimeConfig {
 	pub fn new(opts: ConfigOpts) -> Result<Self> {
-		let acme = RuntimeConfigAcme::new(opts.acme.clone())?;
 		let consul = RuntimeConfigConsul::new(opts.consul.clone())?;
-		let firewall = RuntimeConfigFirewall::new(opts.base.clone())?;
-		let igd = RuntimeConfigIgd::new(opts.base.clone())?;
+		let acme = RuntimeConfigAcme::new(opts.acme.clone())?;
+		let firewall = RuntimeConfigFirewall::new(opts.firewall.clone())?;
+		let igd = RuntimeConfigIgd::new(opts.igd.clone())?;
 
 		Ok(Self {
 			acme,
@@ -56,6 +58,19 @@ impl RuntimeConfig {
 	}
 }
 
+impl RuntimeConfigConsul {
+	pub(super) fn new(opts: ConfigOptsConsul) -> Result<Self> {
+		let node_name = opts.node_name.expect(
+			"'DIPLONAT_CONSUL_NODE_NAME' is required");
+		let url = opts.url.unwrap_or(super::CONSUL_URL.to_string());
+
+		Ok(Self {
+			node_name,
+			url,
+		})
+	}
+}
+
 impl RuntimeConfigAcme {
 	pub fn new(opts: ConfigOptsAcme) -> Result<Option<Self>> {
 		if !opts.enable {
@@ -63,8 +78,7 @@ impl RuntimeConfigAcme {
 		}
 
 		let email = opts.email.expect(
-			"'DIPLONAT_ACME_EMAIL' environment variable is required \
-			if 'DIPLONAT_ACME_ENABLE' == 'true'");
+			"'DIPLONAT_ACME_EMAIL' is required if ACME is enabled");
 
 		Ok(Some(Self {
 			email,
@@ -72,34 +86,29 @@ impl RuntimeConfigAcme {
 	}
 }
 
-impl RuntimeConfigConsul {
-	pub(super) fn new(opts: ConfigOptsConsul) -> Result<Self> {
-		let node_name = opts.node_name.expect(
-			"'DIPLONAT_CONSUL_NODE_NAME' environment variable is required");
-		let url = opts.url.unwrap_or(super::CONSUL_URL.to_string());
-
-		Ok(Self {
-			node_name,
-			url,
-		})
-	}
-}
-
 impl RuntimeConfigFirewall {
-	pub(super) fn new(opts: ConfigOptsBase) -> Result<Self> {
+	pub(super) fn new(opts: ConfigOptsFirewall) -> Result<Option<Self>> {
+		if !opts.enable {
+			return Ok(None);
+		}
+
 		let refresh_time = Duration::from_secs(
 				opts.refresh_time.unwrap_or(super::REFRESH_TIME).into());
 
-		Ok(Self {
+		Ok(Some(Self {
 			refresh_time,
-		})
+		}))
 	}
 }
 
 impl RuntimeConfigIgd {
-	pub(super) fn new(opts: ConfigOptsBase) -> Result<Self> {
+	pub(super) fn new(opts: ConfigOptsIgd) -> Result<Option<Self>> {
+		if !opts.enable {
+			return Ok(None);
+		}
+
 		let private_ip = opts.private_ip.expect(
-			"'DIPLONAT_PRIVATE_IP' environment variable is required");
+			"'DIPLONAT_IGD_PRIVATE_IP' is required if IGD is enabled");
 		let expiration_time = Duration::from_secs(
 				opts.expiration_time.unwrap_or(super::EXPIRATION_TIME).into());
 		let refresh_time = Duration::from_secs(
@@ -112,10 +121,10 @@ impl RuntimeConfigIgd {
 	        refresh_time.as_secs()));
 	    }
 
-		Ok(Self {
+		Ok(Some(Self {
 			private_ip,
 			expiration_time,
 			refresh_time,
-		})
+		}))
 	}
 }

src/consul.rs

@@ -1,6 +1,7 @@
-use serde::{Serialize, Deserialize};
 use std::collections::HashMap;
+
 use anyhow::{Result, anyhow};
+use serde::{Serialize, Deserialize};
 
 #[derive(Serialize, Deserialize, Debug)]
 pub struct ServiceEntry {

src/consul_actor.rs

@@ -1,14 +1,17 @@
 use std::cmp;
+use std::collections::HashSet;
 use std::time::Duration;
-use log::*;
-use tokio::sync::watch;
-use tokio::time::delay_for;
+
 use anyhow::Result;
+use log::*;
 use serde::{Serialize, Deserialize};
 use serde_lexpr::{from_str,error};
-use crate::messages;
+use tokio::sync::watch;
+use tokio::time::delay_for;
+
+use crate::config::RuntimeConfigConsul;
 use crate::consul;
-use std::collections::HashSet;
+use crate::messages;
 
 #[derive(Serialize, Deserialize, Debug)]
 pub enum DiplonatParameter {
@@ -27,6 +30,7 @@ pub struct ConsulActor {
   consul: consul::Consul,
   node: String,
   retries: u32,
+
   tx_open_ports: watch::Sender<messages::PublicExposedPorts>
 }
 
@@ -72,18 +76,18 @@ fn to_open_ports(params: &Vec<DiplonatConsul>) -> messages::PublicExposedPorts {
 }
 
 impl ConsulActor {
-  pub fn new(url: &str, node: &str) -> Self {
+  pub fn new(config: RuntimeConfigConsul) -> Self {
     let (tx, rx) = watch::channel(messages::PublicExposedPorts{
       tcp_ports: HashSet::new(),
       udp_ports: HashSet::new()
     });
 
     return Self {
-      consul: consul::Consul::new(url),
+      consul: consul::Consul::new(&config.url),
+      node: config.node_name,
+      retries: 0,
       rx_open_ports: rx,
       tx_open_ports: tx,
-      node: node.to_string(),
-      retries: 0,
     };
   }
 

src/diplonat.rs

@@ -1,4 +1,4 @@
-use anyhow::Result;
+use anyhow::{Result, anyhow};
 use tokio::try_join;
 
 use crate::config::ConfigOpts;
@@ -8,43 +8,60 @@ use crate::igd_actor::IgdActor;
 
 pub struct Diplonat {
   consul: ConsulActor,
-  firewall: FirewallActor,
-  igd: IgdActor,
+
+  firewall: Option<FirewallActor>,
+  igd: Option<IgdActor>,
 }
 
 impl Diplonat {
   pub async fn new() -> Result<Self> {
-    let rt_cfg = ConfigOpts::from_env()?;
-    println!("{:#?}", rt_cfg);
+    let config = ConfigOpts::from_env()?;
+    println!("{:#?}", config);
     
-    let ca = ConsulActor::new(&rt_cfg.consul.url, &rt_cfg.consul.node_name);
+    let consul_actor = ConsulActor::new(config.consul);
 
-    let fw = FirewallActor::new(
-        rt_cfg.firewall.refresh_time,
-        &ca.rx_open_ports
+    let firewall_actor = FirewallActor::new(
+        config.firewall,
+        &consul_actor.rx_open_ports
     ).await?;
     
-    let ia = IgdActor::new(
-      &rt_cfg.igd.private_ip, 
-      rt_cfg.igd.refresh_time, 
-      rt_cfg.igd.expiration_time, 
-      &ca.rx_open_ports
+    let igd_actor = IgdActor::new(
+      config.igd,
+      &consul_actor.rx_open_ports
     ).await?;
 
+    if firewall_actor.is_none() && igd_actor.is_none() {
+      return Err(anyhow!(
+        "At least enable *one* module, otherwise it's boring!"));
+    }
+
     let ctx = Self {
-      consul: ca,
-      igd: ia,
-      firewall: fw
+      consul: consul_actor,
+      firewall: firewall_actor,
+      igd: igd_actor,
     };
 
     return Ok(ctx);
   }
 
   pub async fn listen(&mut self) -> Result<()> {
+    let firewall = &mut self.firewall;
+    let igd = &mut self.igd;
+
     try_join!(
       self.consul.listen(),
-      self.igd.listen(),
-      self.firewall.listen()
+      async {
+        match firewall {
+          Some(x) => x.listen().await,
+          None => Ok(())
+        }
+      },
+      async {
+        match igd {
+          Some(x) => x.listen().await,
+          None => Ok(())
+        }
+      },
     )?;
 
     return Ok(());

src/fw.rs

@@ -1,9 +1,11 @@
-use iptables;
-use regex::Regex;
 use std::collections::HashSet;
-use crate::messages;
+
 use anyhow::{Result,Context};
+use iptables;
 use log::*;
+use regex::Regex;
+
+use crate::messages;
 
 pub fn setup(ipt: &iptables::IPTables) -> Result<()> {
 

src/fw_actor.rs

@@ -1,37 +1,47 @@
+use std::collections::HashSet;
+
 use anyhow::Result;
+use iptables;
+use log::*;
 use tokio::{
   select, 
   sync::watch, 
   time::{
+    Duration,
     self, 
-    Duration
 }};
-use log::*;
 
-use iptables;
-use crate::messages;
+use crate::config::RuntimeConfigFirewall;
 use crate::fw;
-use std::collections::HashSet;
+use crate::messages;
+
 
 pub struct FirewallActor {
   pub ipt: iptables::IPTables,
-  rx_ports: watch::Receiver<messages::PublicExposedPorts>,
+
   last_ports: messages::PublicExposedPorts,
-  refresh: Duration
+  refresh: Duration,
+
+  rx_ports: watch::Receiver<messages::PublicExposedPorts>,
 }
 
 impl FirewallActor {
-  pub async fn new(_refresh: Duration, rxp: &watch::Receiver<messages::PublicExposedPorts>) -> Result<Self> {
+  pub async fn new(config: Option<RuntimeConfigFirewall>, rxp: &watch::Receiver<messages::PublicExposedPorts>) -> Result<Option<Self>> {
+    if config.is_none() {
+      return Ok(None);
+    }
+    let config = config.unwrap();
+
     let ctx = Self { 
       ipt: iptables::new(false)?,
-      rx_ports: rxp.clone(),
       last_ports: messages::PublicExposedPorts::new(),
-      refresh: _refresh,
+      refresh: config.refresh_time,
+      rx_ports: rxp.clone(),
     };
 
     fw::setup(&ctx.ipt)?;
     
-    return Ok(ctx);
+    return Ok(Some(ctx));
   }
 
   pub async fn listen(&mut self) -> Result<()> {

src/igd_actor.rs

@@ -1,43 +1,52 @@
+use std::net::SocketAddrV4;
+
+use anyhow::{Result, Context};
 use igd::aio::*;
 use igd::PortMappingProtocol;
-use std::net::SocketAddrV4;
 use log::*;
-use anyhow::{Result, Context};
 use tokio::{
   select, 
   sync::watch, 
   time::{
+    Duration,
     self, 
-    Duration
 }};
+
+use crate::config::RuntimeConfigIgd;
 use crate::messages;
 
 pub struct IgdActor {
-  last_ports: messages::PublicExposedPorts,
-  rx_ports: watch::Receiver<messages::PublicExposedPorts>,
+  expire: Duration,
   gateway: Gateway,
+  last_ports: messages::PublicExposedPorts,
+  private_ip: String,
   refresh: Duration,
-  expire: Duration,
-  private_ip: String
+
+  rx_ports: watch::Receiver<messages::PublicExposedPorts>,
 }
 
 impl IgdActor {
-  pub async fn new(priv_ip: &str, refresh: Duration, expire: Duration, rxp: &watch::Receiver<messages::PublicExposedPorts>) -> Result<Self> {
+  pub async fn new(config: Option<RuntimeConfigIgd>, rxp: &watch::Receiver<messages::PublicExposedPorts>) -> Result<Option<Self>> {
+    if config.is_none() {
+      return Ok(None);
+    }
+    let config = config.unwrap();
+
     let gw = search_gateway(Default::default())
               .await
               .context("Failed to find IGD gateway")?;
     info!("IGD gateway: {}", gw);
 
     let ctx = Self { 
+      expire: config.expiration_time,
       gateway: gw,
+      last_ports: messages::PublicExposedPorts::new(),
+      private_ip: config.private_ip,
+      refresh: config.refresh_time,
       rx_ports: rxp.clone(),
-      private_ip: priv_ip.to_string(),
-      refresh: refresh,
-      expire: expire,
-      last_ports: messages::PublicExposedPorts::new()
     };
 
-    return Ok(ctx);
+    return Ok(Some(ctx));
   }
 
   pub async fn listen(&mut self) -> Result<()> {