WIP

README.md

@@ -1,32 +1,41 @@
-# Woly
+# Wolz
 
-Broadcast Wake on Lan (WoL) magic packet to network devices in the local network.
+- Broadcast Wake on Lan (WoL) magic packet to network devices in the local network.
+- WoL only works if the target network interface supports it and is not in low power mode. Check [arch wiki](https://wiki.archlinux.org/title/Wake-on-LAN) on this subject to setup your device to wakup
 
-## Magic Packet
+## Usage
 
-If MAC = aa:bb:cc:dd:ee:ff
+Run `wolz` to view the help text.
 
-UDP packet is constructed as follows, and sent to 255.255.255.255:9
+## Troubleshooting
 
-FF x 6; Mac Address x 16
+This tool broadcasts the magic packet to the limited broadcast address 255.255.255.255 and port 9.
 
-eg.
+Install `tcpdump` to inspect the network traffic published to the limited broadcast address (255.255.255.255) and port 9
+
+```bash
+$> # Update `enp42s0` to your interface name.
+$> # To find out the interface to which the kernel 
+$> # routes the packets to, do
+$> # ip route get 255.255.255.255
+$> sudo tcpdump -i enp42s0 udp and host 255.255.255.255 and port 9 -n -XX
+$>
+$> # Sample output for mac 04:7c:16:6e:c0:2f 
+0x0000:  4500 0082 6153 4000 4011 ceb6 0a60 0002  E...aS@.@....`..
+0x0010:  ffff ffff 8bd0 0009 006e b739 ffff ffff  .........n.9....
+0x0020:  ffff 047c 166e c02f 047c 166e c02f 047c  ...|.n./.|.n./.|
+0x0030:  166e c02f 047c 166e c02f 047c 166e c02f  .n./.|.n./.|.n./
+0x0040:  047c 166e c02f 047c 166e c02f 047c 166e  .|.n./.|.n./.|.n
+0x0050:  c02f 047c 166e c02f 047c 166e c02f 047c  ./.|.n./.|.n./.|
+0x0060:  166e c02f 047c 166e c02f 047c 166e c02f  .n./.|.n./.|.n./
+0x0070:  047c 166e c02f 047c 166e c02f 047c 166e  .|.n./.|.n./.|.n
+0x0080:  c02f                                     ./
 ```
-FF FF FF FF FF FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
-AA BB CC DD EE FF
+
+If you have VPN enabled, depending on the configuration the kernel might route it to the tunnel interface, and the tool will not work.
+
+To debug TCP packets intended to wolz-daemon, run
+
+```
+$> sudo tcpdump -i lo tcp and port 21367 -n -XX
 ```

crates/wolz-client/src/main.rs

@@ -9,10 +9,18 @@ fn main() -> WResult<()> {
         return Ok(());
     };
 
+    match arg_1.as_str() {
+        "-h" | "--help" => {
+            print_usage();
+            return Ok(());
+        }
+        _ => {
             let wolz = Wolz::create()?;
             wolz.wake_up(&arg_1)?;
             Ok(())
         }
+    }
+}
 
 fn print_usage() {
     println!(
@@ -22,17 +30,16 @@ fn print_usage() {
 Options:
          ARG   Either the mac address of the device to send the wol magic
                packet to, or a nickname specified in woly.conf to lookup
-            the mac.
+               the mac. See details about config file below.
                Eg: woly aa:bb:cc:dd:ee:ff
                Eg: woly potato
-                where potato is configured in the woly.conf file as
-                potato=aa:bb:cc:dd:ee:ff
 
 Config file:
     Filename   woly.conf
     Location   $WOLY_CONFIG_DIR/woly.conf, then $XDG_CONFIG_DIR/woly.conf,
                then $HOME/woly.conf
-    Format     one KEY=VALUE per line without spaces
+      Format   KEY=VALUE
+               one per line without spaces, no comments allowed
      Example   potato=aa:bb:cc:dd:ee:ff
                idly=12:34:23:e2:3d:ff
 "#

crates/wolz-daemon/src/main.rs

@@ -11,7 +11,7 @@ use std::{
 fn main() -> DResult<()> {
     let address = "0.0.0.0:21367";
     let listener = TcpListener::bind(address).map_err(DError::TcpBindError)?;
-    println!("Listening on {}", address);
+    println!("Listening for TCP packets at {}", address);
     for mut stream in listener.incoming() {
         match &mut stream {
             Ok(stream) => {

crates/wolz-lib/src/config.rs

@@ -47,6 +47,7 @@ impl Config {
                     &nick.name
                 )))
                 .map(|mac| mac.clone()),
+            Device::IpV4(ip_v4) => todo!(),
         }
     }
 

crates/wolz-lib/src/wolz.rs

@@ -30,7 +30,4 @@ impl Wolz {
         println!("Magic packet sent to 255.255.255.255:9 for Mac {:}", mac);
         Ok(())
     }
-
-    pub fn shutdown(&self, ip_or_nick: &str) -> WResult<()> {
-    }
 }