adding interface listing

Author: Mzack9999

pkg/runner/banners.go

@@ -1,6 +1,9 @@
 package runner
 
 import (
+	"net"
+	"strings"
+
 	"github.com/projectdiscovery/gologger"
 	"github.com/projectdiscovery/naabu/pkg/runas"
 )
@@ -36,6 +39,26 @@ func showNetworkCapabilities() {
 	gologger.Infof("Scan Type: %s\n", scanType)
 }
 
+func showNetworkInterfaces() error {
+	interfaces, err := net.Interfaces()
+	if err != nil {
+		return err
+	}
+	for _, itf := range interfaces {
+		addresses, err := itf.Addrs()
+		if err != nil {
+			gologger.Warningf("Could not retrieve addresses for %s: %s\n", itf.Name, err)
+			continue
+		}
+		var addrstr []string
+		for _, address := range addresses {
+			addrstr = append(addrstr, address.String())
+		}
+		gologger.Infof("Interface %s:\nMAC: %s\nAddresses: %s\nMTU: %d\nFlags: %s\n", itf.Name, itf.HardwareAddr, strings.Join(addrstr, " "), itf.MTU, itf.Flags.String())
+	}
+	return nil
+}
+
 func handlePrivileges(options *Options) error {
 	if options.Privileged {
 		return runas.Root()

pkg/runner/options.go

@@ -42,6 +42,7 @@ type Options struct {
 	SourceIp           string
 	Interface          string
 	WarmUpTime         int
+	InterfacesList     bool
 }
 
 // ParseOptions parses the command line flags provided by a user
@@ -79,6 +80,7 @@ func ParseOptions() *Options {
 	flag.BoolVar(&options.Unprivileged, "unprivileged", false, "Drop root privileges")
 	flag.BoolVar(&options.ExcludeCDN, "exclude-cdn", false, "Avoid scanning CDN ips")
 	flag.IntVar(&options.WarmUpTime, "warm-up-time", 2, "Time in Seconds between scan phases")
+	flag.BoolVar(&options.InterfacesList, "interface-list", false, "list available interfaces and exit")
 	flag.Parse()
 
 	// Check if stdin pipe was given
@@ -95,6 +97,12 @@ func ParseOptions() *Options {
 		os.Exit(0)
 	}
 
+	// Show network configuration and exit if the user requested it
+	if options.InterfacesList {
+		showNetworkInterfaces()
+		os.Exit(0)
+	}
+
 	// Validate the options passed by the user and if any
 	// invalid options have been used, exit.
 	err := options.validateOptions()
@@ -104,6 +112,7 @@ func ParseOptions() *Options {
 
 	showNetworkCapabilities()
 
+	// Handle privileges - most probably elevation will fail as the process would need to invoke fork()
 	err = handlePrivileges(options)
 	if err != nil {
 		gologger.Warningf("Could not set privileges:%s\n", err)