Struct PortScanner 

pub struct PortScanner { /* private fields */ }

Concurrent TCP port scanner.

The Arc<Semaphore> caps TCP connects across all concurrent scan_host calls on the same scanner instance. buffer_unordered alone would only bound a single call. SweepEngine reuses one scanner across hundreds of hosts in parallel, so without the shared permit pool a /24 sweep could attempt hosts × ports simultaneous connects (easily 64k sockets).

Implementations

impl PortScanner

pub fn new(concurrency: usize) -> Self

pub async fn scan_host( &self, target: IpAddr, ports: Vec<u16>, timeout_ms: u64, ) -> Result<Vec<PortResult>>

pub async fn scan_host_with_progress( &self, target: IpAddr, ports: Vec<u16>, timeout_ms: u64, progress: Option<Arc<dyn Fn(PortScanProgress) + Send + Sync>>, ) -> Result<Vec<PortResult>>

Scan ports on target.

Validates the port list rather than trusting the caller. Ops does the same check before calling in, but this is public API on a published crate: a consumer building a Vec<u16> by hand reached the scanner directly and neither the 4,096-port cap nor the port-0 rejection applied. The doc comment on Ops::resolve_ports claimed “every scanning entry point funnels through here”, and this was one of two that did not.

Trait Implementations

impl Clone for PortScanner

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.