Refactor main

src/main.rs

@@ -85,7 +85,7 @@ struct Arg {
 
 fn main() -> Result<()> {
     let arg = Arg::parse();
-    let mut file = arg.output.map(|path| {
+    let mut output = arg.output.map(|path| {
         //TODO automatically add file extension
         let file_out = File::create(path).expect("Error opening file for writing");
         let header = PcapHeader {
@@ -101,8 +101,8 @@ fn main() -> Result<()> {
             let file = io::BufReader::new(io::stdin());
             thread::spawn(move || tnc_loop(tx, file).unwrap());
         }
-        s if Path::new(s).exists() => {
-            let file = io::BufReader::new(File::open(s)?);
+        path if Path::new(path).exists() => {
+            let file = io::BufReader::new(File::open(path)?);
             thread::spawn(move || tnc_loop(tx, file).unwrap());
         }
         addr => {
@@ -113,37 +113,28 @@ fn main() -> Result<()> {
     }
 
     while let Ok(pkt) = rx.recv() {
-        //let time = SystemTime::now();
-        //let timestamp = time.duration_since(SystemTime::UNIX_EPOCH);
-        let mut s = String::new();
-        for byte in pkt.data.iter() {
-            //if byte >= ' '.into() && byte <= '~'.into() {
-            if *byte >= 32 && *byte <= 126 {
-                s.push((*byte).into());
-            } else {
-                s.push_str(&format!("\\{:x?} ", *byte));
-            }
-        }
-
-        if arg.verbose {
-            if let Ok(frame) = Ax25Frame::from_bytes(&pkt.data[1..]) {
+        if let Ok(frame) = Ax25Frame::from_bytes(&pkt.data[1..]) {
+            if arg.verbose {
                 frame.print_long();
             } else {
-                //TODO print time stamp
-                println!("{}", s);
+                frame.print_short();
             }
         } else {
-            if let Ok(frame) = Ax25Frame::from_bytes(&pkt.data[1..]) {
-                frame.print_short();
-            } else {
-                //TODO print time stamp
-                println!("{}", s);
+            let mut s = String::new();
+            for byte in pkt.data.iter() {
+                if *byte >= 32 && *byte <= 126 {
+                    s.push((*byte).into());
+                } else {
+                    s.push_str(&format!("\\{:x?} ", *byte));
+                }
             }
+            //TODO print time stamp
+            println!("{}", s);
         }
 
-        if let Some(ref mut writer) = file {
-            let pkt = PcapPacket::new_owned(pkt.timestamp, pkt.orig_len, pkt.data);
-            writer.write_packet(&pkt).unwrap();
+        if let Some(ref mut writer) = output {
+            let pcpkt = PcapPacket::new_owned(pkt.timestamp, pkt.orig_len, pkt.data);
+            writer.write_packet(&pcpkt).unwrap();
         }
     }