add option to change scanner port

README.md

@@ -33,5 +33,6 @@ nano Snowstorm.toml # modify Snowstorm.toml to your liking
 cd web
 npm run build
 cd ..
+iptables -A INPUT -p tcp --dport 61000 -j DROP # prevent os from closing the connections
 cargo r -r --bin snowstorm
 ```

Snowstorm.toml.example

@@ -27,6 +27,7 @@ secret = "some random key"
 [scanner]
 enabled = true
 interface_name = "eth0"
+source_port = 61000
 task_size_sanity_limit = 1000000
 mode_duration = 300
 push_to_db = true

crates/config/src/lib.rs

@@ -64,6 +64,8 @@ pub struct ScannerConfig {
     #[default = false]
     pub enabled: bool,
     pub interface_name: String,
+    #[serde(default = "default_source_port")]
+    pub source_port: u16,
     pub task_size_sanity_limit: u64,
     pub mode_duration: u64,
     #[serde(default = "_true")]
@@ -113,6 +115,9 @@ pub struct OauthForgejoConfig {
     pub user_api_uri: String,
 }
 
-fn _true() -> bool {
+const fn _true() -> bool {
     true
 }
+const fn default_source_port() -> u16 {
+    61000
+}

crates/io/src/pnet/mod.rs

@@ -27,7 +27,7 @@ impl PnetScanner {
         state: Arc<Mutex<ScannerState>>,
         sender: Sender<(PingResult, Vec<PlayerInfo>)>,
     ) -> Self {
-        let source_port = SourcePort::Number(61000);
+        let source_port = SourcePort::Number(config::get().scanner.source_port);
         let socket = StatelessTcp::new(source_port);
         let syn_writer = socket.write.clone();
         tokio::spawn(async move { receive::start_server(socket, sender).await });