Fix err on empty IFACES

Author: aceberg

CHANGELOG.md

@@ -1,6 +1,10 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
+## [v2.0.2] - 2024-09-
+### Fixed
+- Error when `IFACES`=""
+
 ## [v2.0.1] - 2024-09-02
 ### Added
 - `Vlans` and `docker0` support [#47](https://github.com/aceberg/WatchYourLAN/issues/47). Thanks [thehijacker](https://github.com/thehijacker)!

README.md

@@ -7,7 +7,8 @@
 [![Go Report Card](https://goreportcard.com/badge/github.com/aceberg/WatchYourLAN)](https://goreportcard.com/report/github.com/aceberg/WatchYourLAN)
 [![Maintainability](https://api.codeclimate.com/v1/badges/46b17f99edc1726b5d7d/maintainability)](https://codeclimate.com/github/aceberg/WatchYourLAN/maintainability)
 ![Docker Image Size (latest semver)](https://img.shields.io/docker/image-size/aceberg/watchyourlan)
-![Docker Pulls](https://img.shields.io/docker/pulls/aceberg/watchyourlan)
+![GitHub Discussions](https://img.shields.io/github/discussions/aceberg/WatchYourLAN)
+
 
 Lightweight network IP scanner with web GUI. Features:
 - Send notification when new host is found

internal/arp/arpscan.go

@@ -68,17 +68,21 @@ func parseOutput(text, iface string) []models.Host {
 // Scan all interfaces
 func Scan(ifaces, args string, strs []string) []models.Host {
 	var text string
+	var p []string
 	var foundHosts = []models.Host{}
 	arpArgs = args
 
-	p := strings.Split(ifaces, " ")
+	if ifaces != "" {
 
-	for _, iface := range p {
-		slog.Debug("Scanning interface " + iface)
-		text = scanIface(iface)
-		slog.Debug("Found IPs: \n" + text)
+		p = strings.Split(ifaces, " ")
+
+		for _, iface := range p {
+			slog.Debug("Scanning interface " + iface)
+			text = scanIface(iface)
+			slog.Debug("Found IPs: \n" + text)
 
-		foundHosts = append(foundHosts, parseOutput(text, iface)...)
+			foundHosts = append(foundHosts, parseOutput(text, iface)...)
+		}
 	}
 
 	for _, s := range strs {