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Lanscan - Blazing fast, local network scanning in Go

Introduction

Lanscan is a small, blazing fast and easy to use golang library to scan for hosts in your local network. It's job is to identify hosts nearby that are listening on a specified port. The goal is to make scans like these as fast and simple as possible. Just provide a port, the number of parallel threads and a timeout. Lanscan will take care of the rest...

Features

• Automatic restriction to your link local network
• Automatic prioritization of nearby IPs
• Automatic scan on all network interfaces
• Automatic adaption to your network latency
• Full support for parallel scanning
• Ability to stop after a timeout

Getting started

package main

import "github.com/stefanwichmann/lanscan"
import "time"
import "log"

func main() {
  // Scan for hosts listening on tcp port 80.
  // Use 20 threads and timeout after 5 seconds.
  hosts, err := lanscan.ScanLinkLocal("tcp4", 80, 20, 5*time.Second)
  if err != nil {
    log.Fatal(err)
  }
  for _, host := range hosts {
    log.Printf("Host %v responded.", host)
  }
}

Status

Lanscan is still work in progress and far from done! Right now it's working stable in an IPv4 environment when scanning for TCP services. Once a TCP handshake is successfully completed Lanscan considers the host reachable. Open tasks right now are:

• IPv6 discovery
• UDP discovery
• Provide a proper command line tool for scanning