add example library import

README.md

@@ -14,6 +14,7 @@
   <a href="#installation">Installation</a> •
   <a href="#usage">Usage</a> •
   <a href="#running-fingerprintx">Running fingerprintx</a> •
+  <a href="#using-as-a-library">Using as a library</a> •
   <a href="#why-not-nmap">Why not nmap?</a> •
   <a href="#notes">Notes</a> •
   <a href="#acknowledgements">Acknowledgements</a>
@@ -169,6 +170,9 @@ $ cat input.txt | fingerprintx --json
 {"host":"telehack.com","ip":"64.13.139.230","port":23,"service":"telnet","transport":"tcp","metadata":{"serverData":"fffb03"}}
 ```
 
+# Using as a library
+`fingerprintx` can be imported into your project to scan for services on open ports. Example code on how one might do this is provided [here in the examples directory](examples/scan.go). Build with `go build scan.go`. Another file that might be of use as a reference when importing `fingerprintx` into your own project is the [command line runner](pkg/runner/root.go).
+
 # Why Not Nmap?
 [Nmap](https://nmap.org/) is the standard for network scanning. Why use `fingerprintx` instead of nmap? The main two reasons are:
 

examples/scan.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/netip"
+	"time"
+
+	"github.com/praetorian-inc/fingerprintx/pkg/plugins"
+	"github.com/praetorian-inc/fingerprintx/pkg/scan"
+)
+
+func main() {
+	// setup the scan config (mirrors command line options)
+	fxConfig := scan.Config{
+		DefaultTimeout: time.Duration(2) * time.Second,
+		FastMode:       false,
+		Verbose:        false,
+		UDP:            false,
+	}
+
+	// create a target list to scan
+	ip, _ := netip.ParseAddr("146.148.61.165")
+	target := plugins.Target{
+		Address: netip.AddrPortFrom(ip, 443),
+		Host:    "praetorian.com",
+	}
+	targets := make([]plugins.Target, 1)
+	targets = append(targets, target)
+
+	// run the scan
+	results, err := scan.ScanTargets(targets, fxConfig)
+	if err != nil {
+		log.Fatalf("error: %s\n", err)
+	}
+
+	// process the results
+	for _, result := range results {
+		fmt.Printf("%s:%d (%s/%s)\n", result.Host, result.Port, result.Transport, result.Protocol)
+	}
+}