wrote the skeleton of ACME. Involved solving the cosmetic warnings about CamelCase for enums (without changing the API).

src/acme_actor.rs

@@ -0,0 +1,70 @@
+use anyhow::Result;
+use log::*;
+use tokio::{
+  select, 
+  sync::watch, 
+  time::{
+    Duration,
+    self, 
+}};
+
+use crate::config::RuntimeConfigAcme;
+use crate::messages;
+
+pub struct AcmeActor {
+  email: String,
+  last_ports: messages::PublicExposedPorts,
+  refresh: Duration,
+
+  rx_ports: watch::Receiver<messages::PublicExposedPorts>,
+}
+
+impl AcmeActor {
+  pub async fn new(
+      config: Option<RuntimeConfigAcme>,
+      rxp: &watch::Receiver<messages::PublicExposedPorts>
+      ) -> Result<Option<Self>> {
+
+    if config.is_none() {
+      return Ok(None);
+    }
+    let config = config.unwrap();
+
+    let ctx = Self { 
+      email: config.email,
+      last_ports: messages::PublicExposedPorts::new(),  
+      refresh: config.refresh_time,
+      rx_ports: rxp.clone(),
+    };
+
+    Ok(Some(ctx))
+  }
+
+  pub async fn listen(&mut self) -> Result<()> {
+    let mut interval = time::interval(self.refresh);
+    loop {
+      // 1. Wait for an event
+      let new_ports = select! {
+        Some(ports) = self.rx_ports.recv() => Some(ports),
+        _ = interval.tick() => None,
+        else => return Ok(()) // Sender dropped, terminate loop.
+      };
+
+      // 2. Update last ports if needed
+      if let Some(p) = new_ports { self.last_ports = p; }
+
+      // 3. Flush IGD requests
+      match self.do_acme().await {
+        Ok(()) => debug!("Successfully updated ACME"),
+        Err(e) => error!("An error occured while updating ACME. {}", e),
+      }
+    }
+  }
+
+  pub async fn do_acme(&self) -> Result<()> {
+    debug!("Doing ACME!!!");
+    debug!("{:#?}", self.last_ports);
+
+    Ok(())
+  }
+}

src/config/options.rs

@@ -34,6 +34,8 @@ pub struct ConfigOptsAcme {
 
 	/// The default domain holder's e-mail [default: None]
 	pub email: Option<String>,
+	/// Refresh time for firewall rules [default: 300]
+	pub refresh_time: Option<u16>,
 }
 
 /// Firewall configuration options

src/config/runtime.rs

@@ -20,6 +20,7 @@ pub struct RuntimeConfigConsul {
 #[derive(Debug)]
 pub struct RuntimeConfigAcme {
 	pub email: String,
+	pub refresh_time: Duration,
 }
 
 #[derive(Debug)]
@@ -79,9 +80,12 @@ impl RuntimeConfigAcme {
 
 		let email = opts.email.expect(
 			"'DIPLONAT_ACME_EMAIL' is required if ACME is enabled");
+		let refresh_time = Duration::from_secs(
+				opts.refresh_time.unwrap_or(super::REFRESH_TIME).into());
 
 		Ok(Some(Self {
 			email,
+			refresh_time,
 		}))
 	}
 }

src/consul_actor.rs

@@ -14,9 +14,11 @@ use crate::consul;
 use crate::messages;
 
 #[derive(Serialize, Deserialize, Debug)]
+#[serde(rename_all = "snake_case")]
 pub enum DiplonatParameter {
-  tcp_port(HashSet<u16>),
+  TcpPort(HashSet<u16>),
-  udp_port(HashSet<u16>)
+  UdpPort(HashSet<u16>),
+  Acme(HashSet<String>)
 }
 
 #[derive(Serialize, Deserialize, Debug)]
@@ -57,17 +59,19 @@ fn to_parameters(catalog: &consul::CatalogNode) -> Vec<DiplonatConsul> {
 }
 
 fn to_open_ports(params: &Vec<DiplonatConsul>) -> messages::PublicExposedPorts {
-  let mut op = messages::PublicExposedPorts { 
+  // let mut op = messages::PublicExposedPorts { 
-    tcp_ports: HashSet::new(),
+  //   tcp_ports: HashSet::new(),
-    udp_ports: HashSet::new()
+  //   udp_ports: HashSet::new()
-  };
+  // };
+  let mut op = messages::PublicExposedPorts::new();
 
   for conf in params {
     let DiplonatConsul::diplonat(c) = conf;
     for parameter in c {
       match parameter {
-        DiplonatParameter::tcp_port(p) => op.tcp_ports.extend(p),
+        DiplonatParameter::TcpPort(p) => op.tcp_ports.extend(p),
-        DiplonatParameter::udp_port(p) => op.udp_ports.extend(p),
+        DiplonatParameter::UdpPort(p) => op.udp_ports.extend(p),
+        DiplonatParameter::Acme(urls) => op.acme.extend(urls.clone()),
       };
     }
   }
@@ -77,10 +81,11 @@ fn to_open_ports(params: &Vec<DiplonatConsul>) -> messages::PublicExposedPorts {
 
 impl ConsulActor {
   pub fn new(config: RuntimeConfigConsul) -> Self {
-    let (tx, rx) = watch::channel(messages::PublicExposedPorts{
+    let (tx, rx) = watch::channel(messages::PublicExposedPorts::new());
-      tcp_ports: HashSet::new(),
+    // let (tx, rx) = watch::channel(messages::PublicExposedPorts{
-      udp_ports: HashSet::new()
+    //   tcp_ports: HashSet::new(),
-    });
+    //   udp_ports: HashSet::new()
+    // });
 
     return Self {
       consul: consul::Consul::new(&config.url),

src/diplonat.rs

@@ -1,14 +1,17 @@
 use anyhow::{Result, anyhow};
+use log::debug;
 use tokio::try_join;
 
 use crate::config::ConfigOpts;
 use crate::consul_actor::ConsulActor;
+use crate::acme_actor::AcmeActor;
 use crate::fw_actor::FirewallActor;
 use crate::igd_actor::IgdActor;
 
 pub struct Diplonat {
   consul: ConsulActor,
 
+  acme: Option<AcmeActor>,
   firewall: Option<FirewallActor>,
   igd: Option<IgdActor>,
 }
@@ -16,10 +19,15 @@ pub struct Diplonat {
 impl Diplonat {
   pub async fn new() -> Result<Self> {
     let config = ConfigOpts::from_env()?;
-    println!("{:#?}", config);
+    debug!("{:#?}", config);
     
     let consul_actor = ConsulActor::new(config.consul);
 
+    let acme_actor = AcmeActor::new(
+      config.acme,
+      &consul_actor.rx_open_ports
+    ).await?;
+
     let firewall_actor = FirewallActor::new(
         config.firewall,
         &consul_actor.rx_open_ports
@@ -30,13 +38,16 @@ impl Diplonat {
       &consul_actor.rx_open_ports
     ).await?;
 
-    if firewall_actor.is_none() && igd_actor.is_none() {
+    if acme_actor.is_none() && 
+       firewall_actor.is_none() && 
+       igd_actor.is_none() {
       return Err(anyhow!(
         "At least enable *one* module, otherwise it's boring!"));
     }
 
     let ctx = Self {
       consul: consul_actor,
+      acme: acme_actor,
       firewall: firewall_actor,
       igd: igd_actor,
     };
@@ -45,11 +56,18 @@ impl Diplonat {
   }
 
   pub async fn listen(&mut self) -> Result<()> {
+    let acme = &mut self.acme;
     let firewall = &mut self.firewall;
     let igd = &mut self.igd;
 
     try_join!(
       self.consul.listen(),
+      async {
+        match acme {
+          Some(x) => x.listen().await,
+          None => Ok(())
+        }
+      },
       async {
         match firewall {
           Some(x) => x.listen().await,

src/fw.rs

@@ -1,4 +1,4 @@
-use std::collections::HashSet;
+// use std::collections::HashSet;
 
 use anyhow::{Result,Context};
 use iptables;
@@ -31,10 +31,11 @@ pub fn open_ports(ipt: &iptables::IPTables, ports: messages::PublicExposedPorts)
 }
 
 pub fn get_opened_ports(ipt: &iptables::IPTables) -> Result<messages::PublicExposedPorts> {
-    let mut ports = messages::PublicExposedPorts {
+    let mut ports = messages::PublicExposedPorts::new();
-        tcp_ports: HashSet::new(),
+    // let mut ports = messages::PublicExposedPorts {
-        udp_ports: HashSet::new()
+    //     tcp_ports: HashSet::new(),
-    };
+    //     udp_ports: HashSet::new()
+    // };
 
     let list = ipt.list("filter", "DIPLONAT")?;
     let re = Regex::new(r"\-A.*? \-p (\w+).*\-\-dport (\d+).*?\-j ACCEPT").context("Regex matching open ports encountered an unexpected rule")?;

src/fw_actor.rs

@@ -73,7 +73,8 @@ impl FirewallActor {
 
     let ports_to_open = messages::PublicExposedPorts {
         tcp_ports: diff_tcp,
-        udp_ports: diff_udp
+        udp_ports: diff_udp,
+        acme: HashSet::new()
     };
 
     fw::open_ports(&self.ipt, ports_to_open)?;

src/main.rs

@@ -1,3 +1,4 @@
+mod acme_actor;
 mod config;
 mod consul;
 mod consul_actor;

src/messages.rs

@@ -3,14 +3,16 @@ use std::collections::HashSet;
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct PublicExposedPorts {
   pub tcp_ports: HashSet<u16>,
-  pub udp_ports: HashSet<u16>
+  pub udp_ports: HashSet<u16>,
+  pub acme: HashSet<String>
 }
 
 impl PublicExposedPorts {
   pub fn new() -> Self {
     return Self {
       tcp_ports: HashSet::new(),
-      udp_ports: HashSet::new()
+      udp_ports: HashSet::new(),
+      acme: HashSet::new()
     }
   }
 }