1 files changed, 71 insertions, 78 deletions

diff --git a/src/fw.rs b/src/fw.rs
index f416e6a..6745b3f 100644
--- a/src/fw.rs
+++ b/src/fw.rs
@@ -8,96 +8,89 @@ use regex::Regex;
 use crate::messages;
 
 pub fn setup(ipt: &iptables::IPTables) -> Result<()> {
-  // ensure we start from a clean state without any rule already set
-  cleanup(ipt)?;
-
-  info!("{}: creating DIPLONAT chain using", ipt.cmd);
-  ipt
-    .new_chain("filter", "DIPLONAT")
-    .context("Failed to create new chain")?;
-  ipt
-    .insert_unique("filter", "INPUT", "-j DIPLONAT", 1)
-    .context("Failed to insert jump rule")?;
-
-  Ok(())
+    // ensure we start from a clean state without any rule already set
+    cleanup(ipt)?;
+
+    info!("{}: creating DIPLONAT chain using", ipt.cmd);
+    ipt.new_chain("filter", "DIPLONAT")
+        .context("Failed to create new chain")?;
+    ipt.insert_unique("filter", "INPUT", "-j DIPLONAT", 1)
+        .context("Failed to insert jump rule")?;
+
+    Ok(())
 }
 
 pub fn open_ports(ipt: &iptables::IPTables, ports: messages::PublicExposedPorts) -> Result<()> {
-  for p in ports.tcp_ports {
-    info!("{}: opening TCP port {}", ipt.cmd, p);
-    ipt
-      .append(
-        "filter",
-        "DIPLONAT",
-        &format!("-p tcp --dport {} -j ACCEPT", p),
-      )
-      .context("Failed to insert port rule")?;
-  }
-
-  for p in ports.udp_ports {
-    info!("{}: opening UDP port {}", ipt.cmd, p);
-    ipt
-      .append(
-        "filter",
-        "DIPLONAT",
-        &format!("-p udp --dport {} -j ACCEPT", p),
-      )
-      .context("Failed to insert port rule")?;
-  }
-
-  Ok(())
+    for p in ports.tcp_ports {
+        info!("{}: opening TCP port {}", ipt.cmd, p);
+        ipt.append(
+            "filter",
+            "DIPLONAT",
+            &format!("-p tcp --dport {} -j ACCEPT", p),
+        )
+        .context("Failed to insert port rule")?;
+    }
+
+    for p in ports.udp_ports {
+        info!("{}: opening UDP port {}", ipt.cmd, p);
+        ipt.append(
+            "filter",
+            "DIPLONAT",
+            &format!("-p udp --dport {} -j ACCEPT", p),
+        )
+        .context("Failed to insert port rule")?;
+    }
+
+    Ok(())
 }
 
 pub fn get_opened_ports(ipt: &iptables::IPTables) -> Result<messages::PublicExposedPorts> {
-  let mut ports = messages::PublicExposedPorts {
-    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")?;
-  for i in list {
-    let caps = re.captures(&i);
-    match caps {
-      Some(c) => {
-        if let (Some(raw_proto), Some(raw_port)) = (c.get(1), c.get(2)) {
-          let proto = String::from(raw_proto.as_str());
-          let number = String::from(raw_port.as_str()).parse::<u16>()?;
-
-          if proto == "tcp" {
-            ports.tcp_ports.insert(number);
-          } else {
-            ports.udp_ports.insert(number);
-          }
-        } else {
-          error!("Unexpected rule found in DIPLONAT chain")
+    let mut ports = messages::PublicExposedPorts {
+        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")?;
+    for i in list {
+        let caps = re.captures(&i);
+        match caps {
+            Some(c) => {
+                if let (Some(raw_proto), Some(raw_port)) = (c.get(1), c.get(2)) {
+                    let proto = String::from(raw_proto.as_str());
+                    let number = String::from(raw_port.as_str()).parse::<u16>()?;
+
+                    if proto == "tcp" {
+                        ports.tcp_ports.insert(number);
+                    } else {
+                        ports.udp_ports.insert(number);
+                    }
+                } else {
+                    error!("Unexpected rule found in DIPLONAT chain")
+                }
+            }
+            _ => {}
         }
-      }
-      _ => {}
     }
-  }
 
-  Ok(ports)
+    Ok(ports)
 }
 
 pub fn cleanup(ipt: &iptables::IPTables) -> Result<()> {
-  if ipt.chain_exists("filter", "DIPLONAT")? {
-    info!("{}: removing old DIPLONAT chain", ipt.cmd);
-    ipt
-      .flush_chain("filter", "DIPLONAT")
-      .context("Failed to flush the DIPLONAT chain")?;
-
-    if ipt.exists("filter", "INPUT", "-j DIPLONAT")? {
-      ipt
-        .delete("filter", "INPUT", "-j DIPLONAT")
-        .context("Failed to delete jump rule")?;
-    }
+    if ipt.chain_exists("filter", "DIPLONAT")? {
+        info!("{}: removing old DIPLONAT chain", ipt.cmd);
+        ipt.flush_chain("filter", "DIPLONAT")
+            .context("Failed to flush the DIPLONAT chain")?;
+
+        if ipt.exists("filter", "INPUT", "-j DIPLONAT")? {
+            ipt.delete("filter", "INPUT", "-j DIPLONAT")
+                .context("Failed to delete jump rule")?;
+        }
 
-    ipt
-      .delete_chain("filter", "DIPLONAT")
-      .context("Failed to delete chain")?;
-  }
+        ipt.delete_chain("filter", "DIPLONAT")
+            .context("Failed to delete chain")?;
+    }
 
-  Ok(())
+    Ok(())
 }